Patent Application
20170145357
The present invention relates to a cleaning product. In particular, it relates to a cleaning product comprising a spray dispenser and a cleaning composition. The product makes the cleaning of dishware easier and faster.
Traditionally manual dishwashing has been performed by filling a sink with water, adding a dishwashing detergent to create a soapy solution, immersing the soiled articles in the solution, scrubbing the articles and rinsing to remove the remaining soils and remove the suds generated from the soapy solution from the washed articles. Traditionally an entire load of soiled dishware has usually been washed in one go. Nowadays some users prefer to clean articles as soon as they have finished with them rather than wait until they have a full load. This involves washing one article or a small number of articles at the time. The washing is usually performed under running water rather than in a full sink. The cleaning should be fast and involve minimum effort from the user.
Nowadays, a high number of users prefer to do the washing under the tap. This usually involves the use of a cleaning implement, such as a sponge. The user delivers detergent to the sponge. When the number of items to be cleaned is small, there is the risk of dosing more detergent than required, this will require the need for more rinsing for the dishware and the cleaning implement. Another disadvantage associated to this method, is that some time is required to mix the detergent with water in the sponge, this can slow down the cleaning process.
The level and type of soil found on dishware varies considerably depending on the use of the dishware. Dishware can be lightly soiled or can have hard to remove soils such as baked-, cooked- and/or burnt-on soils. It might be easier to design different products for different types/degrees of soils however this might not be very practical because the user would have to have a large number of dishwashing products.
When the cleaning of a lightly soiled article is done under running water, it is desirable that the cleaning is performed quickly and with minimum effort. Ideally, the product should be applied and then immediately rinsed obviating or reducing the need for scrubbing.
When articles are soiled with difficult to remove soils, it is desirable that the product facilitates the cleaning task by softening the well-attached soils. It is desirable that the softening takes place in a short time. In cases in which the soils are really tough it is common practice to soak the items before cleaning. The soaking time should be short.
Spray products are well liked by users. A sprayable composition for use in hand dishwashing should be easy to spray, deliver fast and long lasting suds, easy to rinse and at the same time should provide fast and good cleaning of a variety of soils. The composition should be such that when sprayed onto the dishware spreading to the surrounding atmosphere should be minimised or avoided. Spreading to the surrounding atmosphere can not only give rise to waste of the product but it can also have inhalation risks associated to it.
The object of the present invention is to facilitate cleaning, especially the manual dishwashing task, in particular by reducing the time and effort needed to achieve the cleaning.
According to a first aspect of the invention, there is provided a cleaning product. The product is suitable for the cleaning of any kind of surfaces but preferably the product is a hand dishwashing cleaning product. The product comprises a spray dispenser and a cleaning composition. The composition is a foaming composition and it is suitable for spraying. The composition is housed in the spray dispenser. The “composition” of the cleaning product of the invention is herein sometimes referred to as “the composition of the invention”.
By “spray dispenser” is herein meant a container comprising a housing to accommodate the composition and means to spray that composition. The preferred spraying means being a trigger spray. The composition foams when it is sprayed. Foaming is a property that users associate with cleaning therefore it is important that the composition of the invention foams to send the user the signal that the composition is cleaning.
The composition of the invention comprises:
The compositions of the invention provide very good and fast cleaning and it helps with the foaming of the product. Preferred C4-C6 linear mono-alcohols for use herein are C5-C6 linear mono-alcohols, most preferably 1-pentanol, 1-hexanol, and mixtures thereof. Preferred branched C4-C10 mono-alcohols having one or more C1-C4 branching groups for use herein are C4-C8 primary mono-alcohols having one or more C1-C4 branching groups, preferably the primary 1-alcohol family member thereof. Especially preferred branched C4-C10 mono-alcohols having one or more C1-C4 branching groups for use herein include methyl butanol, ethyl butanol, methyl pentanol, ethyl pentanol, methyl hexanol, ethyl hexanol, propyl hexanol, dimethyl hexanol trimethyl hexanol, methyl hepanol, ethyl heptanol, propyl heptanol, dimethyl heptanol, trimethyl heptanol, methyl octanol, ethyl octanol, propyl octanol, butyl octanol, dimethyl octanol, trimethyl octanol, methyl nonanol, ethyl nonanol, propyl nonanol, butyl nonanol, dimethyl nonanol and trimethyl nonanol, in particular butyl octanol, trimethyl hexanol, ethyl hexanol, propyl heptanol, methyl butanol, and mixtures thereof, preferably the primary 1-alcohol family member thereof, more in particular ethyl hexanol, butyl octanol and trimethyl hexanol, especially 2-ethyl-1-hexanol, 2-butyl-1-octanol, 3,5,5 trimethyl-1-hexanol, and mixtures thereof.
Preferred alkyl mono-glycerols are selected from the group consisting of branched alkyl mono-glycerols and mixtures thereof, more preferably branched C4-C8 alkyl mono-glycerols with one or more C1 to C4 alkyl branching groups, more preferably selected from the group consisting of ethylhexylglycerol, propylheptylglycerol, and mixtures thereof, most preferably 2-ethylhexylglycerol.
Most preferred for use herein are branched C4-C10 mono-alcohols having one or more C1-C4 branching groups.
Especially preferred for use herein are mixtures of mono-alcohols, in particular mixtures comprising a branched C4-C10 mono-alcohol, more in particular mixtures comprising an alcohol selected from the group comprising C4-C8 more preferably C6-C7 branched primary alcohols. Preferably for use herein is a mixture of alcohols comprising an alcohol selected from the group comprising C4-C8 branched primary alcohols with an alcohol selected of the group of C4-C6 linear mono-alcohols and alkylglycerols. Ethylhexanol especially 2-ethyl-1-hexanol, propylhexanol especially 2-propyl-1-heptanol, and methyl hexanol, in particular trimethyl hexanol especially 3,5,5 trimethyl-1-hexanol, have been found particularly good when they are part of a mixture, in terms of cleaning and speed of cleaning. Compositions comprising mixtures of alcohols can be more effective across a plurality of different oily soils.
Preferably, the surfactant system and the alcohol are in a weight ratio of from about 5:1 to about 1:1, preferably from about 3:1 to about 1:1. The surfactant system seems to help with the cleaning and foam generation. The alcohol helps with the speed of cleaning and with foam generation and stabilization.
Furthermore, the composition of the invention provides good cleaning, including cleaning of though food soils such as cooked-, baked- and burnt-on soils and good cleaning of light oily soils. The composition of the invention not only provides outstanding cleaning but also very fast cleaning, requiring reduced scrubbing effort by the consumer. Thus the product of the invention is especially suitable for cleaning dishware under the tap. When the dishware is only lightly soiled the composition of the invention provides very good cleaning with reduced scrubbing or in the absence of scrubbing. The dishware can be cleaned by simply spraying the composition followed by a rinse with water, optionally aided by a low force wiping action.
In the case of heavily soiled dishware the product of the invention is very good to facilitate the removal of the soil when the product is used to pre-treat the dishware. Pre-treatment usually involves leaving the soiled dishware with the neat product.
Preferably, the composition of the invention has a pH greater than 8, more preferably from 10 to 12, most preferably from 10.5 to 11.5 as measured at 10% solution in distilled water at 20° C. and a reserve alkalinity of from about 0.1 to about 1, more preferably from about 0.1 to about 0.5. Reserve alkalinity is herein expressed as grams of NaOH/100 ml of composition required to titrate product from a pH 10 to the pH of the finished composition. This pH and reserve alkalinity further contribute to the cleaning of tough food soils.
Compositions having a surfactant system comprising an anionic surfactant and a co-surfactant have been found to be very good from a cleaning and sudsing viewpoint. They have also been found very good from a spray pattern view point. The presence of small droplets (and therefore the risk of inhalation) is minimized when the surfactant system of the composition of the invention contains anionic surfactant. By co-surfactant is herein meant a surfactant that is present in the composition in an amount lower than the main surfactant. By main surfactant is herein meant the surfactant that is present in the composition in the highest amount. Preferably the anionic surfactant is a sulfate surfactant, more preferably an alkyl ethoxylate sulfate or a branched short chain alkyl sulfate. It has been found that alkyl ethoxylated sulfate with an average degree of ethoxylation from about 2 to about 4, more preferably about 3, performs better in terms of cleaning and speed of cleaning than other ethoxylate alkyl sulfate surfactants with a lower degree of ethoxylation.
By a “branched short chain alkyl sulfate” is herein meant a surfactant having a linear alkyl sulfate backbone, the backbone comprising from 4 to 8, preferably from 5 to 7 carbon atoms, substituted with one or more C1-C5 preferably C1-C3 alkyl branching groups in the C1, C2 or C3, preferably C2 position on the linear alkyl sulfate backbone. This type of anionic surfactant has been found to deliver strong grease cleaning as well as good foaming performance, especially immediate foaming performance upon spraying when the composition comprises amine oxide or betaine, preferably amine oxide as co-surfactant. Preferred branched short chain alkyl sulfate for use herein is a branched hexyl sulfate, more preferably 2-ethyl hexyl sulfate.
Preferably, the co-surfactant is selected from the group consisting of betaine, amine oxide and mixtures thereof. Amine oxide is the preferred co-surfactant for use herein. The co-surfactant seems to help with the sudsing of the product. Particularly good performing products are those in which the anionic surfactant and the co-surfactant are present in a weight ratio of about 4:1 to about 1:1, preferably in a weight ratio of from about 3:1 to about 1:1, most preferably in a weight ratio from about 2:1 to about 1:1. When the anionic surfactant comprises an alkoxylated alkyl sulphate the preferred anionic surfactant:co-surfactant weight ratio is from 3:1 to 2:1. When the anionic surfactant comprises a short chain branched alkyl sulphate surfactant the preferred anionic surfactant:co-surfactant weight ratio is from 2:1 to 1:1. Especially preferred are compositions in which the co-surfactant comprises amine oxide.
Alternatively, composition comprising a main surfactant selected from the group consisting of betaine, amine oxide and mixtures thereof have been found to provide good performance. Amine oxide is the preferred main surfactant for use herein. The co-surfactant is selected from the group consisting of non-ionic surfactant, anionic surfactant and mixtures thereof. Particularly good performing products are those in which the primary surfactant and the co-surfactant are present in a weight ratio of about 10:1 to about 4:1, preferably in a weight ratio of from about 8:1 to about 3:1, most preferably in a weight ratio from about 7:1 to about 2:1. Especially preferred are compositions in which the co-surfactant comprises a non-ionic surfactant.
Compositions having a surfactant system comprising a non-ionic surfactant and a co-surfactant, preferably a mixture of an anionic surfactant and an amine oxide surfactant as co-surfactant have been found to be very good from a cleaning viewpoint. They have also been found good from a spray pattern view point. The presence of small droplets (and therefore the risk of inhalation) is minimized when the surfactant system of the composition of the invention contains anionic surfactant. Preferably, the co-surfactant is selected from the group consisting of from anionic, amphoteric, zwitteronic and mixtures thereof. Preferred co-surfactant for use herein is a mixture of amine oxide surfactant and linear alkyl benzene sulfonate. The co-surfactant seems to help with the sudsing of the product. Particularly good performing products are those in which the non-ionic surfactant and the co-surfactant are present in a weight ratio of about 6:1 to about 1:1, preferably in a weight ratio of from about 5:1 to about 1:1, most preferably in a weight ratio from about 4:1 to about 1.5:1. Especially preferred are compositions in which the co-surfactant comprises amine oxide and a linear alkyl benzene sulfonate.
The composition of the invention can comprise glycol ethers selected from the group consisting of glycol ethers of Formula I: R1O(R2O)nR3, Formula II: R4O(R5O)nR6 and mixtures thereof wherein R1 is a linear or branched C4, C5 or C6 alkyl or a substituted or unsubstituted phenyl, R2 is ethyl or isopropyl, R3 is hydrogen or methyl and n is 1, 2 or 3, R4 is n-propyl or isopropyl, R5 is isopropyl, R6 is hydrogen or methyl and n is 1, 2 or 3 and mixtures thereof. It has been found that these glycol ethers further help not only with the speed of cleaning of the product but also with the cleaning, especially greasy soils cleaning. This does not seem to happen with glycol ethers having a different formula to Formula I and Formula II. Mixtures of an alcohol according to the invention, in particular a C4-C8 branched primary mono-alcohol with a glycol ether of Formula I, II or mixtures thereof have also been found to provide an unexpected good cleaning and speed of cleaning. In particular mixtures with ethylhexanol especially 2-ethyl-1-hexanol, propylhexanol especially 2-propyl-1-heptanol, and methyl hexanol, in particular trimethyl hexanol especially 3,5,5 trimethyl-1-hexanol, have been found particularly good when they are part of a mixture, in terms of cleaning and speed of cleaning, especially mixtures of these alcohols with propyleneglycol n-butyl ether, dipropyleneglycol n-butyl ether, and mixtures thereof, especially dipropyleneglycol n-butyl ether.
The composition of the invention can comprise a cyclic diamine of Formula (I):
wherein two of the Rs are selected from the group consisting of NH2, (C1-C4)NH2 and mixtures thereof and the remaining Rs are independently selected from H, linear or branched alkyl or alkenyl having from 1 to 10 carbon atoms.
The composition of the invention can comprise cleaning amines such as polyetheramines selected from the group consisting of polyetheramines of Formula (I), Formula (II), Formula (III) and a mixture thereof:
Other preferred amines for use herein are amines of Formula (1):
and mixtures thereof.
Preferred cyclic diamines for use herein include 1,3-bis (aminomethyl) cyclohexane (1,3-BAC), 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine and mixtures thereof. Compositions comprising 1,3-BAC, 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine and mixtures thereof, provide very good grease removal from dishware and the dishware does not feel slippery during rinse. Especially preferred are composition comprising 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine and mixtures thereof.
Preferably, the composition of the invention further comprises a chelant, preferably an aminocarboxylate chelant, more preferably GLDA. The aminocarboxylate not only act as a chelant but also contributes to the reserve alkalinity, this seems to help with the cleaning of cooked-, baked- and burnt-on soils. Preferably, the composition of the invention comprises bicarbonate and/or monoethanol and/or carboxylate builder preferably citrate builder, that as in the case of the of the aminocarboxylate chelant also contribute to the reserve alkalinity.
The composition of the invention can be Newtonian or non-Newtonian. Preferably the composition is a shear thinning fluid. This is important to allow the composition to be easily sprayed. The viscosity of the composition of the invention should also make the fluid to stay in vertical surfaces to provide cleaning and at the same time be easy to rinse. Especially suitable have been found compositions having a starting viscosity at high shear (10,000 s-1) of from about 1 to about 10 mPa s. Preferably, the composition is a shear thinning composition having a low shear (100 s-1) to high shear (10,000 s-1) viscosity ratio of from about 10:1 to about 1.5:1 at 20° C. as measured using the method defined herein below. Preferably the composition of the invention comprises a rheology modifier, more preferably xanthan gum.
A preferred composition has a pH of from 10 to 11.5 as measured in a 10% solution in distilled water at 20° C., a reserve alkalinity of from 0.1 to 0.3 expressed as gNAOH/100 ml of composition at a pH of 10, the composition comprising:
A preferred composition has a pH of from 10 to 11.5 as measured in a 10% solution in distilled water at 20° C., a reserve alkalinity of from 0.1 to 0.3 expressed as g NAOH/100 ml of composition at a pH of 10, the composition comprising:
Another preferred composition has a pH of from 10 to 11.5 as measured in a 10% solution in distilled water at 20° C., a reserve alkalinity of from 0.1 to 0.3 expressed as g NAOH/100 ml of composition at a pH of 10, the composition comprising:
According to the second aspect of the invention, there is provided a method of cleaning soiled dishware using the product according to any of the preceding claims comprising the steps of:
The method of the invention allows for faster and easier cleaning of dishware under running tap, especially when the dishware is lightly soiled. When the dishware is soiled with tough food soils such as cooked-, baked- or burnt-on soils the method of the invention facilitates the cleaning when the soiled dishware is soaked with the product of the invention in neat form or diluted in water.
The present invention envisages a cleaning product, preferably a hand dishwashing cleaning product, the product comprises a spray dispenser and a cleaning composition. The cleaning composition comprises a surfactant system, a specific alcohol and optionally a glycol ether solvent and/or a specific cyclic diamine. The product of the invention simplifies the cleaning task, in particular the manual cleaning task, by making the task easier and faster. The product of the invention is particularly suitable for the manual cleaning of dishware.
For the purpose of the present invention “dishware” encompasses all the items used to either cook or used to serve and eat food.
The cleaning composition is preferably a hand dishwashing cleaning composition, preferably in liquid form.
Preferably the pH of the composition is greater than 8, more preferably from about 10 to about 12 and most preferably from about 10.5 to about 11.5, as measured at 20° C. and 10% concentration in distilled water. Preferably, the composition has a reserve alkalinity of from about 0.1 to about 1, more preferably from about 0.1 to about 0.5 measured as detailed herein below.
Reserve alkalinity is defined as the grams of NaOH per 100 g of composition required to titrate the test composition at pH 10 to come to the test composition pH. The reserve alkalinity for a solution is determined in the following manner.
A pH meter (for example An Orion Model 720A) with an Ag/AgCl electrode (for example an Orion sure flow Electrode model 9172BN) is calibrated using standardized pH 7 and pH 10 buffers. A 100 g of a 10% solution in distilled water at 20° C. of the composition to be tested is prepared. The pH of the 10% solution is measured and the 100 g solution is titrated down to pH 10 using a standardized solution of 0.1 N of HCl. The volume of 0.1N HCl required is recorded in ml. The reserve alkalinity is calculated as follows:
Reserve Alkalinity=ml0.1N HCl×0.1 (equivalent/liter)×Equivalent weight NaOH (g/equivalent)×10
The cleaning composition comprises from about 5% to about 15%, preferably from about 6% to about 14%, more preferably from about 7% to about 12% by weight thereof of a surfactant system. The surfactant system preferably comprises an anionic surfactant, more preferably a sulfate surfactant. The system preferably comprises a co-surfactant preferably selected from the group consisting of amphoteric surfactants, zwitterionic surfactants and mixtures thereof. The system can optionally comprise a non-ionic surfactant.
Alkyl sulfates are preferred for use herein, especially alkyl ethoxy sulfates; more preferably alkyl ethoxy sulfates with an average degree of ethoxylation from about 2 to about 5, most preferably about 3. Branched short chain alkyl sulfate surfactant are also preferred for use herein.
The composition of the invention preferably comprises an amphoteric and/or zwitterionic surfactant, preferably the amphoteric surfactant comprises an amine oxide and the zwitteronic surfactant comprises a betaine surfactant.
Preferably, the anionic surfactant and the co-surfactant are present in the composition of the invention in a weight ratio of about 4:1 to about 1:1, preferably from 3:1 to 1:1 and more preferably from 2.8:1 to 1.3:1.
The most preferred surfactant system for the detergent composition of the present invention comprise: (1) 4% to 10%, preferably 5% to 8% by weight of the composition of an anionic surfactant, preferably an alkyl alkoxy sulfate surfactant or a branched short chain alkyl sulfate; (2) 1% to 5%, preferably from 1% to 4% by weight of the composition of a surfactant selected from the group consisting of amphoteric surfactant, zwitterionic surfactant and mixtures thereof, preferably an amine oxide surfactant. It has been found that such surfactant system in combination with the alcohol of the invention provides excellent cleaning and good foaming profile.
Anionic surfactants include, but are not limited to, those surface-active compounds that contain an organic hydrophobic group containing generally 8 to 22 carbon atoms or generally 8 to 18 carbon atoms in their molecular structure and at least one water-solubilizing group preferably selected from sulfonate, sulfate, and carboxylate so as to form a water-soluble compound. Usually, the hydrophobic group will comprise a linear or branched C8-C22 alkyl, or acyl group. Such surfactants are employed in the form of water-soluble salts and the salt-forming cation usually is selected from sodium, potassium, ammonium, magnesium and mono-, di- or tri-alkanolammonium, with the sodium, cation being the usual one chosen.
The anionic surfactant is preferably a sulfate surfactant. A preferred sulfate surfactant is alkyl ethoxy sulfate, more preferably an alkyl ethoxy sulfate with an average degree of ethoxylation from about 2 to about 5, most preferably about 3. Another preferred sulfate surfactant is a branched short chain alkyl sulphate, in particular 2-ethyl hexyl sulfate.
A preferred sulfate anionic surfactant is an alkoxylated, more preferably, an alkoxylated sulfate anionic surfactant having an average alkoxylation degree from about 2 to about 5, most preferably about 3. Preferably, the alkoxy group is ethoxy. When the sulfate anionic surfactant is a mixture of sulfate anionic surfactants, the average alkoxylation degree is the weight average alkoxylation degree of all the components of the mixture (weight average alkoxylation degree). In the weight average alkoxylation degree calculation the weight of sulfated anionic surfactant components not having alkoxylate groups should also be included.
Weight average alkoxylation degree=(x1*alkoxylation degree of surfactant 1+x2*alkoxylation degree of surfactant 2+ . . . )/(x1+x2+ . . . )
wherein x1, x2, are the weights in grams of each sulfate anionic surfactant of the mixture and alkoxylation degree is the number of alkoxy groups in each sulfate anionic surfactant.
If the surfactant is branched, the preferred branching group is an alkyl. Typically, the alkyl is selected from methyl, ethyl, propyl, butyl, pentyl, cyclic alkyl groups and mixtures thereof. Single or multiple alkyl branches could be present on the main hydrocarbyl chain of the starting alcohol(s) used to produce the sulfate anionic surfactant used in the detergent of the invention.
The branched sulfate anionic surfactant can be a single anionic surfactant or a mixture of anionic surfactants. In the case of a single surfactant the percentage of branching refers to the weight percentage of the hydrocarbyl chains that are branched in the original alcohol from which the surfactant is derived.
In the case of a surfactant mixture the percentage of branching is the weight average and it is defined according to the following formula:
Weight average of branching (%)=[(x1*wt % branched alcohol 1 in alcohol 1+x2*wt % branched alcohol 2 in alcohol 2+ . . . )/(x1+x2+ . . . )]*100
wherein x1, x2, are the weight in grams of each alcohol in the total alcohol mixture of the alcohols which were used as starting material for the anionic surfactant for the detergent of the invention. In the weight average branching degree calculation the weight of anionic surfactant components not having branched groups should also be included.
When the surfactant system comprises a branched anionic surfactant, the surfactant system comprises at least 50%, more preferably at least 60% and preferably at least 70% of branched anionic surfactant by weight of the surfactant system, more preferably the branched anionic surfactant comprises more than 50% by weight thereof of an alkyl ethoxylated sulfate having an average ethoxylation degree of from about 2 to about 5 and preferably a level of branching of from about 5% to about 40%.
Suitable sulfate surfactants for use herein include water-soluble salts of C8-C18 alkyl, preferably C8-C18 alkyl comprising more than 50% by weight of the C8 to C18 alkyl of C12 to C14 alkyl or hydroxyalkyl, sulfate and/or ether sulfate. Suitable counterions include alkali metal cation earth alkali metal cation, alkanolammonium or ammonium or substituted ammonium, but preferably sodium.
The sulfate surfactants may be selected from C8-C18 alkyl alkoxy sulfates (AExS) wherein preferably x is from 1-30 in which the alkoxy group could be selected from ethoxy, propoxy, butoxy or even higher alkoxy groups and mixtures thereof. Especially preferred for use herein is a C12-C14 alkyl ethoxy sulfate with an average degree of ethoxylation from about 2 to about 5, preferably about 3.
Alkyl alkoxy sulfates are commercially available with a variety of chain lengths, ethoxylation and branching degrees. Commercially available sulfates include, those based on Neodol alcohols ex the Shell company, Lial-Isalchem and Safol ex the Sasol company, natural alcohols ex The Procter & Gamble Chemicals company.
If the anionic surfactant is branched, it is preferred that the branched anionic surfactant comprises at least 50%, more preferably at least 60% and especially at least 70% of a sulfate surfactant by weight of the branched anionic surfactant. Preferred from a cleaning view point are those branched surfactants in which the branched anionic surfactant comprises more than 50%, more preferably at least 60% and especially at least 70% by weight thereof of sulfate surfactant and the sulfate surfactant is selected from the group consisting of alkyl sulfate, alkyl ethoxy sulfates and mixtures thereof. Even more preferred are those in which the branched anionic surfactant has an average degree of ethoxylation of from about 2 to about 5, more preferably about 3 and even more preferably when the anionic surfactant has an average level of branching of from about 10% to about 35%, %, more preferably from about 20% to 30%.
Linear alkyl alkoxylate sulfate surfactants are preferred for use in the composition of the invention.
This type of anionic surfactants has been found to deliver strong grease cleaning. They also present good foaming performance, when used in combination with amine oxide or betaine especially amine oxide surfactants, especially immediate foaming performance upon spraying.
The branched short chain alkyl sulfate surfactants according to the current invention have a linear alkyl sulfate backbone comprising from 4 to 8 carbon atoms, substituted with one or more C1-C5 alkyl branching groups in the C1, C2 or C3 position on the linear alkyl sulfate backbone. The sulfate group within the branched short chain alkyl sulfate surfactant is bonded directly to said C4-C8 linear backbone in terminal position.
Preferably the linear alkyl sulfate backbone comprises from 5 to 7 carbon atoms. Preferably the one or more alkyl branching groups are selected from methyl, ethyl, propyl or isopropyl. Preferably the branched short chain alkyl sulfate surfactant has only one branching group substituted on its linear backbone chain. Preferably the alkyl branching group is on the C2 position in the linear alkyl sulfate backbone.
More preferably the branched short chain alkyl sulfate according to the current invention has a linear alkyl backbone comprising from 5 to 7 carbons, substituted on the C2 position in the linear alkyl sulfate backbone with one alkyl branching group selected from methyl, ethyl, propyl. Most preferably the branched short chain alkyl sulfate surfactant is 2-ethylhexylsulfate. This compound is commercially available under the Syntapon EH tradename from Enaspol and Empicol 0585U from Huntsman.
The branched short chain alkyl sulfate surfactant will be formulated from about 3% to about 10%, preferably from about 4% to about 8% by weight of the composition.
The branched short chain alkyl sulfate surfactant will be formulated from about 50% to about 100%, preferably from about 55% to about 75% by weight of the total surfactant composition.
Preferably the amphoteric surfactant is an amine oxide. Preferred amine oxides are alkyl dimethyl amine oxide or alkyl amido propyl dimethyl amine oxide, more preferably alkyl dimethyl amine oxide and especially coco dimethyl amino oxide. Amine oxide may have a linear or mid-branched alkyl moiety. Typical linear amine oxides include water-soluble amine oxides containing one R1 C8-18 alkyl moiety and 2 R2 and R3 moieties selected from the group consisting of C1-3 alkyl groups and C1-3 hydroxyalkyl groups. Preferably amine oxide is characterized by the formula R1-N(R2)(R3) O wherein R1 is a C8-18 alkyl and R2 and R3 are selected from the group consisting of methyl, ethyl, propyl, isopropyl, 2-hydroxethyl, 2-hydroxypropyl and 3-hydroxypropyl. The linear amine oxide surfactants in particular may include linear C10-C18 alkyl dimethyl amine oxides and linear C8-C12 alkoxy ethyl dihydroxy ethyl amine oxides. Preferred amine oxides include linear C10, linear C10-C12, and linear C12-C14 alkyl dimethyl amine oxides. As used herein “mid-branched” means that the amine oxide has one alkyl moiety having n1 carbon atoms with one alkyl branch on the alkyl moiety having n2 carbon atoms. The alkyl branch is located on the a carbon from the nitrogen on the alkyl moiety. This type of branching for the amine oxide is also known in the art as an internal amine oxide. The total sum of n1 and n2 is from 10 to 24 carbon atoms, preferably from 12 to 20, and more preferably from 10 to 16. The number of carbon atoms for the one alkyl moiety (n1) should be approximately the same number of carbon atoms as the one alkyl branch (n2) such that the one alkyl moiety and the one alkyl branch are symmetric. As used herein “symmetric” means that |n1−n2| is less than or equal to 5, preferably 4, most preferably from 0 to 4 carbon atoms in at least 50 wt %, more preferably at least 75 wt % to 100 wt % of the mid-branched amine oxides for use herein.
The amine oxide further comprises two moieties, independently selected from a C1-3 alkyl, a C1-3 hydroxyalkyl group, or a polyethylene oxide group containing an average of from about 1 to about 3 ethylene oxide groups. Preferably the two moieties are selected from a C1-3 alkyl, more preferably both are selected as a C1 alkyl.
Other suitable surfactants include zwitterionic surfactants, preferably betaines, such as alkyl betaines, alkylamidobetaine, amidazoliniumbetaine, sulfobetaine (INCI Sultaines) and phosphobetaines. A preferred betaine is, for example, Cocoamidopropylbetaine.
Nonionic surfactant, when present, is comprised in a typical amount of from 0.1% to 10%, preferably 0.2% to 8%, most preferably 0.5% to 6% by weight of the composition. Suitable nonionic surfactants include the condensation products of aliphatic alcohols with from 1 to 25 moles of ethylene oxide. The alkyl chain of the aliphatic alcohol can either be straight or branched, primary or secondary, and generally contains from 8 to 22 carbon atoms. Particularly preferred are the condensation products of alcohols having an alkyl group containing from 10 to 18 carbon atoms, preferably from 10 to 15 carbon atoms with from 2 to 18 moles, preferably 2 to 15, more preferably 5-12 of ethylene oxide per mole of alcohol. Highly preferred nonionic surfactants are the condensation products of guerbet alcohols with from 2 to 18 moles, preferably 2 to 15, more preferably 5-12 of ethylene oxide per mole of alcohol.
Other suitable non-ionic surfactants for use herein include fatty alcohol polyglycol ethers, alkylpolyglucosides and fatty acid glucamides.
The composition of the invention comprises from 0.1 to 10%, preferably from 1 to 9%, more preferably from 2 to 8%, most preferably from 4 to 6% by weight of the composition of an alcohol selected from the group consisting of C4-C6 linear mono-alcohols, branched C4-C10 mono-alcohols having one or more C1-C4 branching groups, alkyl mono-glycerols, and mixtures thereof.
Preferred C4-C6 linear mono-alcohols are selected from pentanol, hexanol, and mixtures thereof, preferably 1-pentanol, 1-hexanol, and mixtures thereof.
Preferred branched C4-C10 mono-alcohols having one or more C1-C4 branching groups for use herein are C4-C8 primary mono-alcohols having one or more C1-C4 branching groups, and mixtures thereof. Especially preferred branched C4-C10 mono-alcohols having one or more C1-C4 branching groups for use herein include methyl butanol, ethyl butanol, methyl pentanol, ethyl pentanol, methyl hexanol, ethyl hexanol, propyl hexanol, dimethyl hexanol trimethyl hexanol, methyl hepanol, ethyl heptanol, propyl heptanol, dimethyl heptanol, trimethyl heptanol, methyl octanol, ethyl octanol, propyl octanol, butyl octanol, dimethyl octanol, trimethyl octanol, methyl nonanol, ethyl nonanol, propyl nonanol, butyl nonanol, dimethyl nonanol and trimethyl nonanol, and mixtures thereof. More preferred for use herein are the primary 1-alcohol member of branched C4-C10 mono-alcohols having one or more C1-C4 branching groups, especially preferred are the primary 1-alcohol family members of methyl butanol, ethyl butanol, methyl pentanol, ethyl pentanol, methyl hexanol, ethyl hexanol, propyl hexanol, dimethyl hexanol trimethyl hexanol, methyl hepanol, ethyl heptanol, propyl heptanol, dimethyl heptanol, trimethyl heptanol, methyl octanol, ethyl octanol, propyl octanol, butyl octanol, dimethyl octanol, trimethyl octanol, methyl nonanol, ethyl nonanol, propyl nonanol, butyl nonanol, dimethyl nonanol, trimethyl nonanol, and mixtures thereof.
More preferred alcohols are butyl octanol, trimethyl hexanol, ethyl hexanol, propyl heptanol, methyl butanol, and mixtures thereof, in particular the primary 1-alcohol family member, more in particular ethyl hexanol, butyl octanol, trimethyl hexanol, and mixtures thereof, especially 2-ethyl-1-hexanol, 2-butyl-1-octanol, 3,5,5 trimethyl-1-hexanol, and mixtures thereof.
Preferred alkyl mono-glycerols are selected from the group consisting of branched alkyl mono-glycerols and mixtures thereof, more preferably branched C4-C8 alkyl mono-glycerols with one or more C1 to C4 alkyl branching groups, more preferably selected from the group consisting of ethylhexylglycerol, propylheptylglycerol, and mixtures thereof, most preferably 2-ethylhexylglycerol.
The alcohol of the product of the invention can boost foaming.
Especially preferred for use herein are mixtures of mono-alcohols, in particular mixtures comprising a branched C4-C10 mono-alcohol, more in particular mixtures comprising an alcohol selected from the group comprising C4-C8 more preferably C6-C7 branched primary alcohols. Preferably for use is a mixture of alcohols comprising an alcohol selected from the group comprising C4-C8 branched primary alcohols with an alcohol selected of the group of C4-C6 linear mono-alcohols and alkylglycerols. Mixtures can boost foaming and improve cleaning over a plurality of different oily soils.
The composition of the invention can comprise a glycol ether solvent selected from glycol ethers of Formula I or Formula II.
Formula I=R1O(R2O)nR3 wherein R1 is a linear or branched C4, C5 or C6 alkyl, a substituted or unsubstituted phenyl, preferably n-butyl. Benzyl is one of the substituted phenyls for use herein. R2 is ethyl or isopropyl, preferably isopropyl. R3 is hydrogen or methyl, preferably hydrogen, n is 1, 2 or 3, preferably 1 or 2
Formula II=R4O(R5O)nR6 wherein R4 is n-propyl or isopropyl, preferably n-propyl. R5 is isopropyl. R6 is hydrogen or methyl, preferably hydrogen n is 1, 2 or 3 preferably 1 or 2.
Suitable glycol ether solvents according to Formula I include ethyleneglycol n-butyl ether, diethyleneglycol n-butyl ether, triethyleneglycol n-butyl ether, propyleneglycol n-butyl ether, dipropyleneglycol n-butyl ether, tripropyleneglycol n-butyl ether, ethyleneglycol n-pentyl ether, diethyleneglycol n-pentyl ether, triethyleneglycol n-pentyl ether, propyleneglycol n-pentyl ether, dipropyleneglycol n-pentyl ether, tripropyleneglycol n-pentyl ether, ethyleneglycol n-hexyl ether, diethyleneglycol n-hexyl ether, triethyleneglycol n-hexyl ether, propyleneglycol n-hexyl ether, dipropyleneglycol n-hexyl ether, tripropyleneglycol n-hexyl ether, ethyleneglycol phenyl ether, diethyleneglycol phenyl ether, triethyleneglycol phenyl ether, propyleneglycol phenyl ether, dipropyleneglycol phenyl ether, tripropyleneglycol phenyl ether, ethyleneglycol benzyl ether, diethyleneglycol benzyl ether, triethyleneglycol benzyl ether, propyleneglycol benzyl ether, dipropyleneglycol benzyl ether, tripropyleneglycol benzyl ether, ethyleneglycol isobutyl ether, diethyleneglycol isobutyl ether, triethyleneglycol isobutyl ether, propyleneglycol isobutyl ether, dipropyleneglycol isobutyl ether, tripropyleneglycol isobutyl ether, ethyleneglycol isopentyl ether, diethyleneglycol isopentyl ether, triethyleneglycol isopentyl ether, propyleneglycol isopentyl ether, dipropyleneglycol isopentyl ether, tripropyleneglycol isopentyl ether, ethyleneglycol isohexyl ether, diethyleneglycol isohexyl ether, triethyleneglycol isohexyl ether, propyleneglycol isohexyl ether, dipropyleneglycol isohexyl ether, tripropyleneglycol isohexyl ether, ethyleneglycol n-butyl methyl ether, diethyleneglycol n-butyl methyl ether triethyleneglycol n-butyl methyl ether, propyleneglycol n-butyl methyl ether, dipropyleneglycol n-butyl methyl ether, tripropyleneglycol n-butyl methyl ether, ethyleneglycol n-pentyl methyl ether, diethyleneglycol n-pentyl methyl ether, triethyleneglycol n-pentyl methyl ether, propyleneglycol n-pentyl methyl ether, dipropyleneglycol n-pentyl methyl ether, tripropyleneglycol n-pentyl methyl ether, ethyleneglycol n-hexyl methyl ether, diethyleneglycol n-hexyl methyl ether, triethyleneglycol n-hexyl methyl ether, propyleneglycol n-hexyl methyl ether, dipropyleneglycol n-hexyl methyl ether, tripropyleneglycol n-hexyl methyl ether, ethyleneglycol phenyl methyl ether, diethyleneglycol phenyl methyl ether, triethyleneglycol phenyl methyl ether, propyleneglycol phenyl methyl ether, dipropyleneglycol phenyl methyl ether, tripropyleneglycol phenyl methyl ether, ethyleneglycol benzyl methyl ether, diethyleneglycol benzyl methyl ether, triethyleneglycol benzyl methyl ether, propyleneglycol benzyl methyl ether, dipropyleneglycol benzyl methyl ether, tripropyleneglycol benzyl methyl ether, ethyleneglycol isobutyl methyl ether, diethyleneglycol isobutyl methyl ether, triethyleneglycol isobutyl methyl ether, propyleneglycol isobutyl methyl ether, dipropyleneglycol isobutyl methyl ether, tripropyleneglycol isobutyl methyl ether, ethyleneglycol isopentyl methyl ether, diethyleneglycol isopentyl methyl ether, triethyleneglycol isopentyl methyl ether, propyleneglycol isopentyl methyl ether, dipropyleneglycol isopentyl methyl ether, tripropyleneglycol isopentyl methyl ether, ethyleneglycol isohexyl methyl ether, diethyleneglycol isohexyl methyl ether, triethyleneglycol isohexyl methyl ether, propyleneglycol isohexyl methyl ether, dipropyleneglycol isohexyl methyl ether, tripropyleneglycol isohexyl methyl ether, and mixtures thereof.
Preferred glycol ether solvents according to Formula I are ethyleneglycol n-butyl ether, diethyleneglycol n-butyl ether, triethyleneglycol n-butyl ether, propyleneglycol n-butyl ether, dipropyleneglycol n-butyl ether, tripropyleneglycol n-butyl ether, and mixtures thereof.
Most preferred glycol ethers according to Formula I are propyleneglycol n-butyl ether, dipropyleneglycol n-butyl ether, and mixtures thereof.
Suitable glycol ether solvents according to Formula II include propyleneglycol n-propyl ether, dipropyleneglycol n-propyl ether, tripropyleneglycol n-propyl ether, propyleneglycol isopropyl ether, dipropyleneglycol isopropyl ether, tripropyleneglycol isopropyl ether, propyleneglycol n-propyl methyl ether, dipropyleneglycol n-propyl methyl ether, tripropyleneglycol n-propyl methyl ether, propyleneglycol isopropyl methyl ether, dipropyleneglycol isopropyl methyl ether, tripropyleneglycol isopropyl methyl ether, and mixtures thereof.
Preferred glycol ether solvents according to Formula II are propyleneglycol n-propyl ether, dipropyleneglycol n-propyl ether, and mixtures thereof.
Most preferred glycol ether solvents are propyleneglycol n-butyl ether, dipropyleneglycol n-butyl ether, and mixtures thereof, especially dipropyleneglycol n-butyl ether.
Suitable glycol ether solvents can be purchased from The Dow Chemical Company, more particularly from the E-series (ethylene glycol based) Glycol Ethers and the P-series (propylene glycol based) Glycol Ethers line-ups. Suitable glycol ether solvents include Butyl Carbitol, Hexyl Carbitol, Butyl Cellosolve, Hexyl Cellosolve, Butoxytriglycol, Dowanol Eph, Dowanol PnP, Dowanol DPnP, Dowanol PnB, Dowanol DPnB, Dowanol TPnB, Dowanol PPh, and mixtures thereof.
The glycol ether of the product of the invention can boost foaming.
Mixtures of an alcohol, in particular a C4-C8 branched primary mono-alcohol with a glycol ether of Formula I, II or mixtures thereof have also been found to provide an unexpected good cleaning and speed of cleaning. Ethylhexanol especially 2-ethyl-1-hexanol, propylhexanol especially 2-propyl-1-heptanol, and methyl hexanol, in particular trimethyl hexanol especially 3,5,5 trimethyl-1-hexanol, have been found particularly good when they are part of a mixture, in terms of cleaning and speed of cleaning, especially mixtures of these alcohols with propyleneglycol n-butyl ether, dipropyleneglycol n-butyl ether, and mixtures thereof, especially dipropyleneglycol n-butyl ether.
The mixtures of alcohols and glycol ethers can boost foaming.
The glycol ether solvent typically is present from about 1% to about 10%, preferably from about 2 to about 8%, most preferably from about 3% to about 7% by weight of the composition. Preferably, weight ratio glycol ether to alcohol is from about 9:1 to about 1:9, preferably from about 7:3 to about 3:7 and more preferably from about 3:2 to about 2:3.
The composition of the invention preferably comprises from about 0.1% to about 10%, more preferably from about 0.2% to about 5%, and especially from about 0.3% to about 2%, by weight of the composition, of a cleaning amine. The term “cleaning amine” herein encompasses a single cleaning amine and a mixture thereof. A “cleaning amine” herein means a molecule comprising amine functionalities that helps cleaning as part of a cleaning composition.
The amine can be subjected to protonation depending on the pH of the cleaning medium in which it is used.
Preferably the cleaning amine is a cyclic diamine of Formula (I):
two of the substituents Rs(R1-R6, R1′-R6′) are independently selected from the group consisting of NH2, (C1-C4)NH2 and mixtures thereof and the remaining substituents Rs are independently selected from H, linear or branched alkyl or alkenyl having from 1 to 10 carbon atoms.
The term “cyclic diamine” herein encompasses a single cleaning amine and a mixture thereof. The amine can be subjected to protonation depending on the pH of the cleaning medium in which it is used.
The amine of Formula (I) is a cyclic amine with two primary amine functionalities. The primary amines can be in any position in the cycle but it has been found that in terms of grease cleaning, better performance can be obtained when the primary amines are in positions 1,3. It has also been found advantageous in terms of grease cleaning amines in which one of the substituents is —CH3 and the rest are H.
Preferred cyclic diamines for use herein are selected from the group consisting of:
and a mixture thereof.
Especially preferred for use herein are cyclic diamines selected from the group consisting of 1,3-bis(methylamine)-cyclohexane, 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine and mixtures thereof. 1, 3-bis(methylamine)-cyclohexane is especially preferred for use herein. Mixtures of 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine are also preferred for use herein.
Preferred cleaning amines include polyetheramines. One of the polyetheramine preferred for use in the composition of the invention is represented by the structure of Formula (I):
where each of R1-R6 is independently selected from H, alkyl, cycloalkyl, aryl, alkylaryl, or arylalkyl, where at least one of R1-R6 is different from H, typically at least one of R1-R6 is an alkyl group having 2 to 8 carbon atoms, each of A1-A6, is independently selected from linear or branched alkylenes having 2 to 18 carbon atoms, each of Z1-Z2 is independently selected from OH or NH2, where at least one of Z1-Z2 is NH2, typically each of Z1 and Z2 is NH2, where the sum of x+y is in the range of about 2 to about 200, typically about 2 to about 20, more typically about 2 to about 10 or about 3 to about 8 or about 4 to about 6, where x≧1 and y≧1. and the sum of x1+y1 is in the range of about 2 to about 200, typically about 2 to about 20, more typically about 2 to about 10 or about 3 to about 8 or about 2 to about 4, where x1≧1 and y1≧1.
Preferably in the polyetheramine of Formula (I), each of A1-A6, is independently selected from ethylene, propylene, or butylene, typically each of A1-A6, is propylene. More preferably, in the polyetheramine of Formula (I), each of R1, R2, R5, and R6, is H and each of R3 and R4 is independently selected from C1-C16 alkyl or aryl, typically each of R1, R2, R5, and R6 is H and each of R3 and R4 is independently selected from a butyl group, an ethyl group, a methyl group, a propyl group, or a phenyl group. More preferably, in the polyetheramine of Formula (I), R3 is an ethyl group, each of R1, R2, R5, and R6 is H, and R4 is a butyl group. Especially, in the polyetheramine of Formula (I), each of R1 and R2 is H and each of R3, R4, R5, and R6, is independently selected from an ethyl group, a methyl group, a propyl group, a butyl group, a phenyl group, or H.
In the polyetheramine represented by the structure of Formula (II):
each of R7-R12 is independently selected from H, alkyl, cycloalkyl, aryl, alkylaryl, or arylalkyl, where at least one of R7-R12 is different from H, typically at least one of R7-R12 is an alkyl group having 2 to 8 carbon atoms, each of A7-A9 is independently selected from linear or branched alkylenes having 2 to 18 carbon atoms, each of Z3-Z4 is independently selected from OH or NH2, where at least one of Z3-Z4 is NH2, typically each of Z3 and Z4 is NH2, where the sum of x+y is in the range of about 2 to about 200, typically about 2 to about 20, more typically about 2 to about or about 3 to about 8 or about 2 to about 4, where x≧1 and y≧1 and the sum of x1+y1 is in the range of about 2 to about 200, typically about 2 to about 20, more typically about 2 to about 10 or about 3 to about 8 or about 2 to about 4, where x1≧1 and y1≧1.
Preferably in the polyetheramine of Formula (II), each of A7-A9 is independently selected from ethylene, propylene, or butylene, typically each of A7-A9 is propylene. More preferably, in the polyetheramine of Formula (II), each of R7, R8, R11, and R12 is H and each of R9 and R10 is independently selected from C1-C16 alkyl or aryl, typically each of R7, R8, R11, and R12 is H and each of R9 and R10 is independently selected from a butyl group, an ethyl group, a methyl group, a propyl group, or a phenyl group. More preferably, in the polyetheramine of Formula (II), R9 is an ethyl group, each of R7, R8, R11, and R12 is H, and R10 is a butyl group. In some aspects, in the polyetheramine of Formula (II), each of R7 and R8 is H and each of R9, R10, R11, and R12 is independently selected from an ethyl group, a methyl group, a propyl group, a butyl group, a phenyl group, or H.
Preferred polyetheramines are selected from the group consisting of Formula A, Formula B, and mixtures thereof:
Preferably, the polyetheramine comprises a mixture of the compound of Formula (I) and the compound of Formula (II).
Typically, the polyetheramine of Formula (I) or Formula (II) has a weight average molecular weight of less than about grams/mole 1000 grams/mole, preferably from about 100 to about 800 grams/mole, more preferably from about 200 to about 450 grams/mole.
The cleaning amine of Formula (1) has an ethylene diamine core with at least one primary amine functionality. The cleaning amine also comprises at least another nitrogen atom, preferable in the form of a tertiary amine functionality. Herein the term “core” refers to the alkyl chain between two nitrogen radicals. The number of carbons in the core does not include the radicals attached to the core.
The cleaning amine has the formula:
Preferably, the cleaning amine is aliphatic in nature. The cleaning amine preferably has a molecular weight of less than about 1000 grams/mole and more preferably less than about 450 grams/mole.
“n” varies from 0 to not more than 3, preferably “n” is 0. The amine molecule contains at least one primary amine functionality and preferably a tertiary amine functionality.
Suitable cleaning amines for use herein include amines wherein R1 and R2 are selected from isopropyl and butyl, preferably R1 and R2 are both isopropyl or both butyl.
Preferably cleaning amines include those in which R1 and R2 are isopropyl and preferably, n is 0. Also preferred are amines in which R1 and R2 are butyl and preferably, n is 0
R5 is preferably —CH3 or —CH2CH3. Cleaning amines in which R5 is —CH3 or —CH2CH3 could be good in terms of composition stability. Without being bound by theory, it is believed that the methyl or ethyl radical can provide stearic hinderance that protects the cleaning amine from negative interaction with other components of the cleaning composition.
The cleaning amine of formula (2) has a C3-C6 diamine core with at least one of the amine functionalities being a primary amine. Herein the term “core” refers to the alkyl chain between two nitrogen radicals. The number of carbons in the core does not include the radicals attached to the core.
The cleaning amine of formula (2) preferably has a molecular weight of less than about 1000 grams/mole and more preferably less than about 450 grams/mole.
“n” varies from 0 to not more than 3, preferably “n” is 0. The amine molecule contains at least one primary amine functionality and preferably a tertiary amine functionality.
Suitable cleaning amines include amines wherein R1 and R2 are selected from propyl, butyl and hexyl, preferably R1 and R2 are both propyl, butyl or hexyl. Preferably n is 0.
Another preferred cleaning amine for use herein is cyclohexyl propylenediamine (wherein n=0, R1 is cyclohexanyl and R2 is H)
The amine of formula (3):
Is preferred for use herein
The composition herein may optionally further comprise a chelant at a level of from 0.1% to 10%, preferably from 0.2% to 5%, more preferably from 0.2% to 3%, most preferably from 0.5% to 1.5% by weight of the composition.
Suitable chelating agents can be selected from the group consisting of amino carboxylates, amino phosphonates, polyfunctionally-substituted aromatic chelating agents and mixtures thereof.
Amino carboxylates include ethylenediaminetetra-acetates, N-hydroxyethylethylenediaminetriacetates, nitrilo-triacetates, ethylenediamine tetraproprionates, triethylenetetraaminehexacetates, diethylenetriaminepentaacetates, and ethanoldiglycines, alkali metal, ammonium, and substituted ammonium salts therein and mixtures therein, as well as MGDA (methyl-glycine-diacetic acid), and salts and derivatives thereof and GLDA (glutamic-N,N-diacetic acid) and salts and derivatives thereof. GLDA (salts and derivatives thereof) is especially preferred according to the invention, with the tetrasodium salt thereof being especially preferred.
The composition herein may comprise a builder, preferably a carboxylate builder. Salts of carboxylic acids useful herein include salts of C1-6 linear or at least 3 carbon containing cyclic acids. The linear or cyclic carbon-containing chain of the carboxylic acid or salt thereof may be substituted with a substituent group selected from the group consisting of hydroxyl, ester, ether, aliphatic groups having from 1 to 6, more preferably 1 to 4 carbon atoms, and mixtures thereof.
Preferred salts of carboxylic acids are those selected from the salts from the group consisting of salicylic acid, maleic acid, acetyl salicylic acid, 3 methyl salicylic acid, 4 hydroxy isophthalic acid, dihydroxyfumaric acid, 1,2, 4 benzene tricarboxylic acid, pentanoic acid, citric acid, and mixtures thereof, preferably citric acid.
Alternative carboxylate builders suitable for use in the composition of the invention includes salts of fatty acids like palm kernel derived fatty acids or coconut derived fatty acid, or salts of polycarboxylic acids.
The cation of the salt is preferably selected from alkali metal, alkaline earth metal, monoethanolamine, diethanolamine or triethanolamine and mixtures thereof, preferably sodium.
The carboxylic acid or salt thereof, when present, is preferably present at the level of from 0.1% to 5%, more preferably from 0.2% to 1% by weight of the total composition.
The composition according to the invention might further comprise a rheology modifying agent, providing a shear thinning rheology profile to the product. Preferably the rheology modifying agent is a non crystalline polymeric rheology modifier. This polymeric rheology modifier can be a synthetic or a naturally derived polymer.
Examples of naturally derived polymeric structurants of use in the present invention include: hydroxyethyl cellulose, hydrophobically modified hydroxyethyl cellulose, carboxymethyl cellulose, polysaccharide derivatives and mixtures thereof. Polysaccharide derivatives include but are not limited to pectine, alginate, arabinogalactan (gum Arabic), carrageenan, gum karaya, gum tragacanth, gellan gum, xanthan gum and guar gum. Examples of synthetic polymeric structurants of use in the present invention include polymers and copolymers comprising polycarboxylates, polyacrylates, polyurethanes, polyvinylpyrrolidone, polyols and derivatives and mixtures thereof.
Preferably the composition according to the invention comprises a naturally derived rheology modifying polymer, most preferably Xanthan Gum.
Generally, the rheology modifying polymer will be comprised at a level of from 0.001% to 1% by weight, alternatively from 0.01% to 0.5% by weight, more alternatively from 0.05% to 0.25% by weight of the composition.
The composition herein may comprise a number of optional ingredients such as rheology trimming agents selected from inorganic salts preferably sodium chloride, ethanol, poly alkylene glycols, hydrotropes, and mixtures thereof. The composition might also comprise pH trimming and/or buffering agents such as sodium hydroxide, hydrogen chloride, alkanolamines including monoethanolamine, and bicarbonate inorganic salts. The composition might comprise further minor ingredients selected from preservatives, UV stabilizers, antioxidants, perfumes, coloring agents and mixtures thereof.
The flow curve of products is measured with the use of a Rheometer (TA instruments—model DHR1), a Peltier concentric cylinder temperature system (TA instruments) and a double gap cup and rotor (TA instruments). The flow curve procedure comprises a conditioning step and a flow ramp step at 20° C., the conditioning step comprising a 30 s pre-shear step at a shear rate of 10 s-1 followed by a 120 s zero shear equilibration time. The flow ramp step comprises a Logarithmical shear rate increase from 0.001 s-1 to 10000 s-1 in a time span of 300 s. A data filter is set at the instrument recommended minimum torque value of 20 μNm.
“Low shear viscosity” is defined as the viscosity measured at a shear rate of 100 s-1. “High shear viscosity” is measured at a shear rate of 10000 s-1.
The spray dispenser comprises a housing to accommodate the composition of the invention and spraying means. Suitable spray dispensers include hand pump (sometimes referred to as “trigger”) devices, pressurized can devices, electrostatic spray devices, etc. Preferably the spray dispenser is non-pressurized and the spray means are of the trigger dispensing type.
The ability to diffuse through a layer of oil has been assessed for compositions comprising alcohols inside and outside of the scope of the product of the invention.
The ability of the compositions to penetrate oil was assessed by measuring the breakthrough time, using the following methodology:
35 gram of an aqueous solution containing 0.15% by weight of xanthan gum (supplied by Keltrol™ RD from CP-kelco) was poured into a glossy white ceramic dish plate (Supplied by Ikea—Item:S.Pryle #13781 diameter 26.5 cm).
Olive oil (Sold by Unilever under the Bertoli brand, item number L5313R HO756 MI0002) was dyed red through the addition of 0.05% by weight of red dye (Waxoline Red, red dye pigment supplied by Avecia), stirring for 1 hour in order to provide a homogeneous dye distribution. Then 2.5 grams of the dyed olive oil was delicately deposited onto the water surface thus forming a thin disk of oil layer. The oil disk diameter was measured to ensure that the diameter did not exceed a variation amongst the replicates of more than 20% from the average value. A drop of the cleaning composition was delicately deposited on to the oil layer, in the middle of the oil disk from a 5 ml Pasteur pipette (Supplied by VWR—Item: 5 ml #612-1684), from a height of less than 5 mm. The breakthrough time was measured as the time recorded from the deposition of the solution drop to the opening of the oil disk identified by the appearance of the water layer in the middle of the oil disk. 8 replicates were required per sample to calculate the average breakthrough time.
A soil composition according to table below was prepared through homogeneously mixing the individual components at room temperature.
The beef fat composition is melted and homogenized with 0.05% of Red dye (Oil red EGN from Aldrich) at 50° C. for 1 hr prior to application. 2.5 g of this soil composition was homogeneously applied using a food brush (5 cm wide from Carrefour Home) over white polypropylene plastic tiles of 8 cm*25 cm. The tile is first kept at 50° C. in an oven during 5 minutes and then stored for 24 h under normal lab conditions (20° C., 40% relative humidity) prior to use. The tiles were placed on a four cleaning tracks and four sponge holders straight-line sheen machine tester (Wet Abrasion Scrub Tester Ref. 903PG/SA/B—Source: Sheen Instruments Limited). 10 ml of the compositions are homogeneously distributed over pre-wetted cellulosic sponges, i.e. cellulosic sponges (Artikel Nr. 33100200 Materialnummer Z 1470000 Zuschnitt Schwamm, feinporig 90×40×40-Source: MAPA GmbH—Bereich SPONTEX Industrie Germany), were pre-wetted with demineralized water (20° C.) and squeezed until no water drained from the sponge anymore (weight sponge: 21 g+/−1 g). Sponges were cut by the supplier to dimensions to fit sponge holders of the cleaning apparatus (9 cm*4 cm). New sponges were boil washed in a washing machine in absence of detergent 3 times prior to use. Four sponges were placed under normal lab conditions (20° C., 40% relative humidity) on the sponge holder of the sheen machine on to the soiled tiles. A weight of 200 g was placed on top of the sponges and the sheen machine was set at a moving speed of 20 cycles/minute. The number of strokes required to clean the soiled tiles were counted (end point=visual assessment) and the test result of 8 replicates (2 internal replicates*4 external replicates, i.e. 4 tiles each product tested twice on a tile) were averaged and reported as a grease cleaning index versus a reference product (grease cleaning index test product=(# strokes reference product/# strokes test product)*100). A higher grease cleaning index represents improved grease cleaning efficacy. Testing products were rotated over the different sponge slots between external replicates.
A reference base was formulated through mixing of individual raw materials at normal lab conditions, on top of which 5% by weight of the composition of the alcohols to be tested was added.
The oil breakthrough time of compositions comprising 5% by weight of the composition of the different single alcohols inside and outside the scope of the invention was compared.
From the data in Tables 1 to 3 below it is clear that a composition comprising an alcohol according to the invention (Example formulations) has a faster oil breakthrough time compared to the reference base formulation, while a composition comprising an alcohol outside of the scope of the invention (Comparative example formulations) has a slower oil breakthrough time compared to the reference base formulation.
The oil breakthrough time and beef fat cleaning performance of compositions comprising 5% by weight of the composition of a 50/50 mixture of alcohols or a mixture of alcohols with glycol ethers according to the scope of the invention was assessed versus compositions comprising 5% of the individual alcohol or glycol ether and versus the reference base formulation.
From the data in Table 4 below it is clear that a composition comprising a mixture according to the invention (Examples 3 and 6) has a faster oil breakthrough time and an improved beef fat cleaning performance compared to compositions comprising the individual alcohols or glycol ether (Examples 1, 2, 4 and 5) and compared to the reference base formulation.
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm”
Every document cited herein, including any cross referenced or related patent or application, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 15195708.1 | Nov 2015 | EP | regional |
