Patent Application
20050003994
The present invention relates to surface-active compositions and to the use of such compositions for the antimicrobial treatment of human skin and hair and for the treatment of hard surfaces and textile fibre materials.
Cleaning and disinfectant compositions comprising antimicrobial active ingredients, e.g. personal care preparations, hand and machine dishwashing formulations, cleaning and disinfecting formulations for hard surfaces and liquid and solid textile washing formulations, are becoming ever more widespread. Phenol derivatives and diphenyl ether compounds are known as antibacterial active ingredients.
It has now been found, surprisingly, that a combination of diphenyl ether compounds and phenol derivatives exhibits strong bactericidal effects.
The present invention accordingly relates to a surface-active composition comprising
Preferably, the present invention accordingly relates to a surface-active composition comprising
The composition according to the invention preferably comprises as component (a1) a hydroxy-diphenyl ether of formula
Very special preference is given to a compound of formula
As component (a1) there can also be used a non-halogenated hydroxydiphenyl ether of formula
U1, U2, U3 and U4 having the meaning of C1-C20alkyl are straight-chain or branched alkyl radicals, for example methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, isopentyl, tert-pentyl, hexyl, cyclohexyl, heptyl, octyl, isooctyl, nonyl, decyl and the like.
U1, U2 and U3 as C1-C20alkoxy are straight-chain or branched alkoxy radicals, for example methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, pentyloxy, iso-pentyloxy, tert-pentyloxy, heptyloxy, octyloxy, isooctyloxy, nonyloxy, decyloxy and the like.
U1, U2, U3 and U4 having the meaning of C1-C6alkylcarbonyl are straight-chain or branched carbonyl radicals, for example acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl, pivaloyl and the like.
U1, U2 and U4 having the meaning of hydroxy-substituted C1-C20alkyl are, for example, hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, hydroxypentyl, hydroxyhexyl, hydroxyheptyl, hydroxyoctyl, hydroxynonyl, hydroxydecyl and the like.
According to the invention, preference is given to the use of compounds of formula (1′) wherein OH is in the meta- or para-position relative to the ether bond.
Preferably, U1 and U2 are each independently of the other hydrogen, C1-C20alkyl, C1-C6alkylcarbonyl or C1-C20alkoxy.
U3 is preferably hydrogen, C1-C20alkyl or C1-C20alkoxy.
U4 is preferably hydrogen, C1-C20alkyl, hydroxy, formyl, acetonyl, allyl, carboxymethyl, carboxyallyl, hydroxy-substituted C1-C20alkyl or C1-C6alkylcarbonyl.
Compounds of formula (1′) that are of special interest are:
Other compounds of formula (1′) that are of special interest are:
U1 is C1-C5alkyl, for example the compound of formula
Also of interest are compounds of formula
U4 is C1-C5alkyl, for example the compound of formula
The following compounds are of special interest:
The compounds of formula (1′) are known or can be prepared using methods analogous to those known.
Compounds suitable as component (a2) are preferably those selected from phenol derivatives of formula
Exemplary compounds are chlorophenols (o-, m-, p-chlorophenols), 2,4-dichlorophenol, p-nitrophenol, xylenol, p-chloro-m-xylenol, cresols (o-, m-, p-cresols), p-chloro-m-cresol, pyrocatechol, resorcinol, orcinol, 4-n-hexylresorcinol, pyrogallol, phloroglucinol, carvacrol, thymol, p-chlorothymol, o-phenylphenol, o-benzylphenol and p-chloro-o-benzylphenol.
Further exemplary representatives of component (a2) are chlorhexidines, for example 1,1′-hexamethylene-bis(5-(p-chlorophenyl)biguanide), together with organic and inorganic acids and chlorhexidine derivatives, such as their diacetates, digluconates or dihydrochloride compounds.
Further exemplary phenol derivatives are 1-phenoxypropan-2-ol and 3-(4-chlorophenoxy)-1,2-propanediol.
Very special preference is given to the use of o-phenylphenol as component (a2).
In the composition according to the invention, the combination of (a1) the compound of formula (2) or (3) and (a2) o-phenylphenol is especially used.
The following compounds are suitable as component (b):
All the organic acids mentioned under (b) can also be in the form of their water-soluble salts, such as the alkali metal salts, especially the sodium or potassium salts, or the amine (NR1R2R) salts wherein
Component (b) can consist of a single compound or a plurality of different compounds.
Very special preference is given to a combination of cumenesulfonate and citric acid monohydrate.
As component (c), anionic, nonionic, or zwitterionic and amphoteric synthetic detergents are suitable.
Suitable anionic detergents are
Also used as anionic surfactants are fatty acid methyl taurides, alkyl isothionates, fatty acid polypeptide condensation products and fatty alcohol phosphoric acid esters. The alkyl radicals occurring in those compounds preferably have from 8 to 24 carbon atoms.
The anionic surfactants are generally in the form of their water-soluble salts, such as the alkali metal, ammonium or amine salts. Examples of such salts include lithium, sodium, potassium, ammonium, triethylamine, ethanolamine, diethanolamine and triethanolamine salts. The sodium, potassium or ammonium (NR1R2R3) salts, especially, are used, with R1, R2 and R3 each independently of the others being hydrogen, C1-C4alkyl or C1-C4hydroxyalkyl.
Especially preferred anionic surfactants in the composition according to the invention are monoethanolamine lauryl sulfate or the alkali metal salts of fatty alcohol sulfates, especially sodium lauryl sulfate and the reaction product of from 2 to 4 mol of ethylene oxide and sodium lauryl ether sulfate.
Suitable zwitterionic and amphoteric surfactants include C8-C18betaines, C8-C18sulfobetaines, C8-C24alkylamido-C1-C4alkylenebetaines, imidazoline carboxylates, alkylamphocarboxycarboxylic acids, alkylamphocarboxylic acids (e.g. lauroamphoglycinate) and N-alkyl-β-aminopropionates or -iminodipropionates, with preference being given to C10-C20alkylamido-C1-C4akylenebetaines and especially to coconut fatty acid amide propylbetaine.
Nonionic surfactants that may be mentioned include, for example, derivatives of the adducts of propylene oxide/ethylene oxide having a molecular weight of from 1000 to 15 000, fatty alcohol ethoxylates (1-50 EO), alkylphenol polyglycol ethers (1-50 EO), polyglucosides, ethoxylated hydrocarbons, fatty acid glycol partial esters, for example diethylene glycol monostearate, fatty acid alkanolamides and dialkanolamides, fatty acid alkanolamide ethoxylates and fatty amine oxides.
As component (c) there may also be used the salts of saturated and unsaturated C8-C22 fatty acids either alone or in the form of a mixture with one another or in the form of a mixture with other detergents mentioned as component (c). Examples of such fatty acids include, for example, capric, lauric, myristic, palmitic, stearic, arachidic, behenic, caproleic, dodecenoic, tetradecenoic, octadecenoic, oleic, eicosenoic and erucic acid, and the commercial mixtures of such acids, such as, for example, coconut fatty acid. Such acids are present in the form of salts, there coming into consideration as cations alkali metal cations, such as sodium and potassium cations, metal atoms, such as zinc and aluminium atoms, and nitrogen-containing organic compounds of sufficient alkalinity, such as amines and ethoxylated amines. Such salts may also be prepared in situ.
As component (d) there come into consideration as dihydric alcohols especially those compounds having from 2 to 6 carbon atoms in the alkylene moiety, such as ethylene glycol, 1,2- or 1,3-propanediol, 1,3-, 1,4- or 2,3-butanediol, 1,5-pentanediol and 1,6-hexanediol.
Preference is given to 1,2-propanediol (propylene glycol).
Preferred monohydric alcohols are ethanol, n-propanol and isopropanol and mixtures of those alcohols.
The composition according to the invention comprises, as component (e), builders (zeolites/layered silicates), bleaching agents or bleaching systems (perborate/percarbonate plus TAED), fluorescent whitening agents and enzymes.
Furthermore, the washing composition can comprise enzymes, enzyme stabilisers, thickeners, sequestering agents, for example EDTA or phosphoric acid salts, corrosion inhibitors, colourants, perfumes, fluorescent whitening agents, buffer compounds or the like.
Compositions according to the invention can be prepared by mixing components (a) and optionally (b), (c), (d) and (e) in any desired order with the requisite amount of deionised water and stirring the batch until homogeneous. The composition is made up to 100% with tap water or deionised water. The procedure is purely physical. No chemical reaction takes place between the individual components.
Cleaning and disinfecting formulations according to the present invention may further comprise thickening agents, sequestering agents, antioxidants, UV absorbers, dyes, perfumes, buffer compounds, vitamins, moisturizers, body care substances, solids like waxes etc.
The formulations according to the invention exhibit strong bactericidal activity in two respects:
This can be demonstrated, for example, by a suspension test, e.g. according to test method EN 1276.
This can be demonstrated, for example, by the AATCC 100-1993 method.
They are therefore suitable for disinfecting and cleaning human skin and hands, hard articles and textile fibre materials and can be applied thereto in dilute or undiluted form, an amount of at least 2 ml, preferably in the undiluted form, being suitable for disinfection of the hands.
The compositions according to the invention are very especially used in washing and cleaning formulations, for example in household washing formulations, powder washing formulations, washing pastes, fabric softeners, solid soaps, dishwashing formulations, all-purpose cleaners, especially in liquid washing formulations for textile fibre materials.
The invention accordingly relates also to a method for the antimicrobial treatment of textile fibre materials in washing liquor, which method comprises treating the textile fibre materials in the washing liquor with a composition comprising
In the method according to the invention preference is given to a washing liquor that is free of diphenyl ether compounds, that is to say contains no component (a1).
The invention relates also to a method for imparting antimicrobial properties to textile fibre materials, which method comprises treating the textile fibre materials in the washing liquor with a composition comprising
The textile materials that can be treated in accordance with the invention are undyed or dyed or printed, natural or synthetic fibre materials, for example of silk, wool, polyamide or polyurethanes, and especially cellulosic fibre materials of all kinds. Such fibre materials are, for example, natural cellulose fibres, such as cotton, linen, jute and hemp, as well as cellulose and regenerated cellulose. Preferred suitable textile fibre materials are of cotton.
Using the composition according to the invention it is possible to destroy bacteria present on the washing material in the dilute liquor during the washing procedure. At the same time, antimicrobial properties are imparted to the washed textile material, that is to say bacteria that get on the textile material while it is being worn are destroyed.
The following Examples illustrate the invention. Percentages and parts are percentages by weight and parts by weight, respectively.
Liquid formulations having the following compositions are prepared:
Test Principle:
1.0 ml of a bacterial suspension is added to 8.0 ml of the formulation in question (the test concentration is multiplied by a factor of 1.25) and to 1.0 ml of a suspension of 0.3% (factor 10) bovine albumin and mixed vigorously. After the contact time (see above) at 21° C. (+/−1° C.), a 0.1 ml sample is removed and added to 50 ml of TSB+inactivator (=test neutralisation mixture, 100). 500 μl of the neutralisation mixture are added to 9 ml of TSB+inactivator to give a 10−2 dilution. Each test neutralisation mixture and the dilutions are filtered over a membrane and washed with 150 ml of distilled water. The membranes are incubated for 48 hours on the surface of agar plates. After incubation, the colonies are counted and listed in a Table, and the log reduction is calculated.
The results are given in Table 1.
The results in Table 1 show that good bactericidal effects can be achieved on the textile material using the formulations according to the invention.
Test Principle:
Round cotton textile patches which have been washed under standard conditions (2.3 g detergent in a 300 ml liquor; 30 g textile; washing period: 10 minutes at 40° C.) are placed in sterile Petri dishes (diameter: 55 mm).
All the samples are then inoculated with 0.25 ml of a bacterial suspension (approx. ˜105 cfu/sample) and placed in a humidity chamber at 37° C.
Directly after inoculation and after 8 and 24 hours at 37° C., the inoculated textile patches are placed in 50 ml of 0.07 molar phosphate buffer (pH 7.4, containing 1% Tween 80 and 0.3% lecithin) and shaken for 1 minute. After shaking, a dilution series in sterile distilled water, down to a concentration of 10−2, is prepared. 100 μl samples of the undiluted solution and of the 10−1 and 10−2 dilutions are applied to the plates using a spiralometer. After incubation, the surviving colonies are counted, calculated as cfu/sample and given in Table 2 herein below.
S. aureus ATCC 6538
Klebsiella pneumoniae
Only detergent compositions comprising the compound of formula (3) show a distinct antimicrobial activity on the textile material.
Formulation 20: shower gel
Formulation 21: shampoo
Formulation 22: all purpose cleaner
Formulation 23: dish washing detergent
Formulation 24: softener detergent
| Number | Date | Country | Kind |
|---|---|---|---|
| 00811192.4 | Dec 2000 | EP | regional |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10450226 | Jun 2003 | US |
| Child | 10901733 | Jul 2004 | US |
