Patent Application
20160045424
The present invention relates to formulations comprising certain copolymers and at least one surfactant selected from the group consisting of sulphosuccinates and biosurfactants.
A long-standing problem in the teaching of formulation of cosmetic compositions has been to achieve sufficiently high viscosities for formulations comprising sulphosuccinates or biosurfactants.
Carbomer thickeners for use in cosmetics are known; such carbomers are generally copolymers of (meth)acrylic acid and alkyl (meth)acrylates which have thickening properties when neutralised in aqueous solution, for example, with alkali. EP1953176 and EP 1950231 describe carbomers which have the capacity, unlike conventional carbomers, to provide neutralised solutions in the presence of salt which do not decrease in viscosity or transmission.
The object of the invention was to thicken cosmetic formulations comprising sulphosuccinates or biosurfactants.
Surprisingly, it has been found that the cosmetic formulations described below and the use of the carbomers described are able to solve the problem addressed by the invention.
The present invention therefore relates to formulations comprising certain copolymers and at least one surfactant selected from the group consisting of sulphosuccinates and biosurfactants.
The invention further relates to the use of the particular copolymers for thickening cosmetic formulations comprising sulphosuccinates or biosurfactants.
An advantage of the present invention is that particularly mild, surfactant formulations are obtained.
A further advantage of the present invention is that the formulations do not leave behind any sticky skin sensation.
A further advantage of the present invention is that the formulations have good temperature stability, both in the warm and in the cold.
A further advantage of the invention is that the formulations have good flow properties.
A further advantage of the present invention is that the formulations have good foam quality.
A further advantage of the present invention is that the formulations have good foam stability.
A further advantage of the present invention is that the formulations foam rapidly.
A further advantage of the present invention is that the formulations work with a low WAS content and are therefore economically favourable.
A further advantage of the present invention is that the formulations readily moisten the skin.
A further advantage of the present invention is that the formulations are easily washed off.
A further advantage of the present invention is that the formulations may be prepared without heating.
A further advantage of the present invention is that the formulations are very reproducible, particularly with respect to the viscosity.
A further advantage of the present invention is that the formulations stabilise or solubilise insoluble additives, e.g. oil phases.
A further advantage of the present invention is that the formulations have very high transparency.
The present invention therefore provides cosmetic formulations comprising
In the context of the present invention, the term “neutralised” solution is understood to mean a solution of the polymer which has been adjusted to a pH of 7.0, measured at 25° C.
The viscosity specified in the context of the present invention is measured at 25° C. after one minute of rotation at a spin speed of 20 rpm using a BH type rotary viscometer and spindle no. 6.
The transmission specified in the context of the present invention is measured at a wavelength of 425 nm in a cuvette with an optical path of 1 cm after degassing the sample by centrifugation.
Within the context of the present invention, “biosurfactant” is understood to mean any glycolipid produced by fermentation.
Unless otherwise stated, all percentages (%) given are percentages by weight.
In a preferred embodiment, the formulation according to the invention comprises a component A), which is at least one water-soluble copolymer having alkyl-modified carboxyl groups, obtainable by polymerisation of
In an alternative preferred embodiment, the formulation according to the invention comprises a component A), which is at least one water-soluble copolymer having alkyl-modified carboxyl groups, obtainable by polymerisation of
The copolymers present in the formulations according to the invention can be prepared by known methods; a detailed method description for preparing the copolymers present according to the invention is described in EP1953176 and EP 1950231.
Commercially available polymers have the names, for example, TEGO® Carbomer SER 841 (Evonik Industries), Aqupec SER W150C and Aqupec SER W300C (Sumitomo Seika)
Preferred formulations according to the invention are characterised in that the substance comprising two or more ethylenically unsaturated residues is selected from the group consisting of pentaerythritol allyl ether, diethylene glycol diallyl ether, polyethylene glycol diallyl ether and polyallyl sucrose.
The proportion of component A) in the formulation according to the invention is preferably from 0.01 to 10% by weight, preferably from 0.1 to 5% by weight and particularly preferably from 0.5 to 3% by weight, based on the total formulation.
The proportion of component B) in the formulation according to the invention is preferably from 0.1 to 30% by weight, preferably from 1 to 20% by weight and particularly preferably from 2 to 10% by weight, based on the total formulation.
The formulations according to the invention may comprise sulphosuccinates as component B). These include the salts of alkyl sulphosuccinic acid, also referred to as sulphosuccinic acid esters, and which include the monoesters and/or diesters of sulphosuccinic acid with alcohols, preferably fatty alcohols and particularly ethoxylated fatty alcohols. Preferred sulphosuccinates comprise C8-C18 fatty alcohol residues or mixtures thereof. Particularly preferred sulphosuccinates comprise a fatty alcohol residue which is derived from ethoxylated fatty alcohols. In this case, sulphosuccinates whose fatty alcohol residues are derived from ethoxylated fatty alcohols with a narrow homologue distribution are in turn particularly preferred. It is also possible to use alk(en)yl succinic acid preferably having 8 to 18 carbon atoms in the alk(en)yl chain or salts thereof. Particularly preferred sulphosuccinates are PEG- and sulphate-free. Examples of such PEG- and sulphate-free sulphosuccinates are the monosulphosuccinates of polyglyceryl-6 cocoate, polyglyceryl-4 caprate, polyglyceryl-4 caprylate, polyglyceryl-3 caprate or polyglyceryl-3 caprylate and also mixtures thereof. Particularly preferred PEG- and sulphate-free sulphosuccinates and preparation thereof are described in PCT/EP2013/050367.
The formulation according to the invention preferably has rhamnolipids, sophorolipids, glucose lipids, cellulose lipids and/or trehalose lipids, preferably rhamnolipids and/or sophorolipids, as component B) “biosurfactant”. The biosurfactants, in particular glycolipid surfactants, can be produced e.g. as in EP 0 499 434, U.S. Pat. No. 7,985,722, WO 03/006146, JP 60 183032, DE 19648439, DE 19600743, JP 01 304034, CN 1337439, JP 2006 274233, KR 2004033376, JP 2006 083238, JP 2006 070231, WO 03/002700, FR 2740779, DE 2939519, U.S. Pat. No. 7,556,654, FR 2855752, EP 1445302, JP 2008 062179 and JP 2007 181789 or the documents cited therein. Suitable biosurfactants can be acquired e.g. from Soliance, France.
The formulation according to the invention preferably has, as biosurfactants, rhamnolipids, in particular mono-, di- or polyrhamnolipids and/or sophorolipids. The formulation according to the invention particularly preferably has one or more of the rhamnolipids and/or sophorolipids described in EP 1 445 302 A with the formulae (I), (II) or (III).
A preferred formulation according to the invention is characterised in that said formulation comprises an additional component C), which is selected from the group of compounds containing ammonium, phosphonium, imidazolinium or imidazolium groups, preferably compounds containing quaternised ammonium groups, particularly preferably alkyl quats such as cetrimonium chloride (VARISOFT® 300), dialkyl quats or ester quats, or from the group of cationic polymers, preferably cationic guar, cationic siloxanes, and polyquaternium compounds, particularly polyquaternium 1 to polyquaternium 94, particularly preferably hydroxypropyl guar hydroxypropyltrimonium chloride, polyquaternium 7, polyquaternium 10 and polyquaternium 11, and silicone quaterniurn-22 (ABIL® T Quat 60 and ABIL ME 45).
In the context of the present invention, the term “compound containing ammonium, phosphonium, imidazolinium or imidazolium groups” includes compounds which, under the conditions of the given formulation, for example, due to the pH, predominantly have a proton on the aforementioned group and are therefore cationically charged. Such substances are preferably selected from the group of the aminosiloxanes, particularly preferably aminopropyl dimethicone (ABIL Soft AF 200) or amodimethicone.
The proportion of component C) in the formulation according to the invention is preferably from 0.05 to 30% by weight, preferably from 0.2 to 20% by weight and particularly preferably from 0.5 to 10% by weight, based on the total formulation.
Particular preference is given to formulations according to the invention which are essentially free from alkoxylated compounds. The term “essentially free from alkoxylated compounds” in connection with the present invention is to be understood to mean that the formulations have no notable amounts of alkoxylated compounds which exert a surface-active effect. This is particularly understood to mean that these compounds are present in amounts of less than 1% by weight, preferably less than 0.1% by weight, particularly preferably less than 0.01% by weight, based on the total formulation, in particular no detectable amounts.
Particular preference is given to formulations according to the invention which are essentially free from sulphates. The term “essentially free from sulphates” in connection with the present invention is to be understood to mean that the formulations have no notable amounts of sulphated organic compounds which exert a surface-active effect. This is particularly understood to mean that sulphated organic compounds are present in amounts of less than 1% by weight, preferably less than 0.1% by weight, particularly preferably less than 0.01% by weight, based on the total formulation, in particular no detectable amounts. Examples of sulphate-containing surfactants are sodium laureth sulphate, sodium lauryl sulphate, ammonium laureth sulphate, ammonium lauryl sulphate, sodium myreth sulphate, sodium coco sulphate, sodium trideceth sulphate or MIPA laureth sulphate.
Especially preferred formulations according to the invention are essentially sulphate-free and essentially free from alkoxylated compounds.
The present invention further relates to the use of the copolymers defined above as component A) for thickening cosmetic formulations comprising at least one surfactant selected from the group consisting of sulphosuccinates and biosurfactants. Preferred use according to the invention uses the preferred components A) mentioned above. The same applies to the formulations to be thickened in the context of the use.
The examples adduced below illustrate the present invention by way of example, without any intention of restricting the invention, the scope of application of which is apparent from the entirety of the description and the claims, to the embodiments specified in the examples.
Values given in the Tables are % by weight based on the total formulation.
Thickening effect of TEGO® Carbomer SER 841 on difficult to thicken sulphosuccinate- and/or biosurfactant-containing formulations
The measured values in the following Table show that TEGO® Carbomer SER 841 is capable of thickening relevant formulations with lower salt content in the formulation, whereas Novethix® L-10 (INCI: acrylates/beheneth-25 methacrylate copolymer, [Novethix™ L-10 Polymer] manufactured by Lubrizol Advanced Materials, Inc.) either requires a lot of additional salt, or shows hardly any thickening effect.
Thickening effect of TEGO® Carbomer SER 841 on difficult to thicken sulphosuccinate- and biosurfactant-containing formulations having positively charged polymers
The following Table shows that guar quat and polyquaternium 10 additionally enhance the thickening of a sulphosuccinate- and biosurfactant-containing formulation by the carbomer.
Example formulations:
Mild Hair & Body Shampoo; PEG- and sulphate-free
Mild Hair & Body Shampoo; PEG-, sulphate- and betaine-free
Mild Hair & Body Shampoo; PEG- and sulphate-free
PEG-, sulphate- and betaine-free Conditioning Shampoo
Further formulations:
Mild Hair & Body Shampoo; PEG- and sulphate-free
Mild Hair & Body Shampoo; PEG- and sulphate-free
Mild Hair & Body Shampoo; PEG- and sulphate-free
Mild Hair & Body Shampoo; PEG- and sulphate-free
Body Wash
Mild Hair & Body Shampoo
Mild Hair & Body Shampoo
Mild Intimate Wash Gel
Mild Intimate Wash Gel
Creamy Anti-Dandruff Shampoo
Mild Shampoo
Body Wash
Mild Baby Shampoo
Body Wash
Body Wash
Body Wash
Body Wash
Body Wash
Body Wash
| Number | Date | Country | Kind |
|---|---|---|---|
| 102013206314.8 | Apr 2013 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2014/056637 | 4/3/2014 | WO | 00 |
