Aqueous or aqueous-alcoholic body-cleansing compositions...

Details Aqueous or aqueous-alcoholic body-cleansing compositions... Aqueous or aqueous-alcoholic body-cleansing compositions...

2002-11-06

2004-12-21

Mruk, Brian P. (Department: 1751)

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

Polymer containing

C510S119000, C510S130000, C510S158000, C510S159000, C510S299000, C510S342000, C510S361000, C510S434000, C510S476000, C510S479000, C510S488000, C510S533000

Reexamination Certificate

active

06833129

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to aqueous or aqueous-alcoholic body-cleansing compositions for the mild cleansing and care of the skin, characterized by a content of oligoesters, comprising dicarboxylic acid units and diol units (glycol, alkylglycol and/or polyalkylene polyglycol units).
Body-cleansing and body care in two steps is time-consuming, meaning that many consumers prefer compositions with a combined cleansing and care action.
A large number of cosmetic products attempt to satisfy this demand.
U.S. Pat. No. 5,612,307 claims aqueous, liquid body-cleansing compositions which, in addition to customary surfactant systems, comprise a care component from the group of silicone oils, fats, oils, waxes, hydrophobic plant extracts, fatty acids, alcohols, esters, lipids and/or phospholipids.
WO 94/03152 claims shower gels consisting essentially of a surfactant, silicone oil and a cationic polymer.
One unsatisfactory aspect is that care and moisture-donating compounds cannot be incorporated into aqueous cleanser formulations in a sufficient amount. A further problem is that aqueous dispersions of surfactant systems and moisture-donating and care components separate over the course of time and are therefore not very storage-stable.
SUMMARY OF THE INVENTION
The object was therefore to develop novel skincare body-cleansing compositions which combine cleansing and care action and which are free from the abovementioned disadvantages.
The invention provides aqueous or aqueous-alcoholic body-cleansing compositions, with the exception of hair-treatment compositions, comprising oligoesters obtained by condensation of one or more dicarboxylic acids or esters thereof and one or more polyhydric alcohols.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
These oligoesters are preferably obtained by polycondensation of one or more aromatic dicarboxylic acids or esters thereof with ethylene glycol and/or propylene glycol. Optionally, these esters may also contain polyethylene glycol, polypropylene glycol, sulfoisophthalic acid, sulfobenzoic acid, isethionic acid, C
1
-C
4
-alcohols, oxalkylated C
1
-C
24
-alcohols, oxalkylated C
6
-C
18
-alkylphenols and/or oxalkylated C
8
-C
24
-alkylamines as monomers.
Particular preference is given to the use of those oligoesters obtained by polycondensation of
a) 40 to 52 mol %, preferably 45 to 50 mol %, of one or more aromatic dicarboxylic acids or esters thereof,
b) 10 to 40 mol %, preferably 20 to 35 mol %, of ethylene glycol and/or propylene glycol,
c) 3 to 20 mol %, preferably 10 to 15 mol %, of polyethylene glycol,
d) 0 to 10 mol % of a water-soluble addition product of from 5 to 89 mol of an alkylene oxide with 1 mol of C
1
-C
24
-alcohols, C
6
-C
18
-alkylphenols or C
8
-C
24
-alkylamines and
e) 0 to 10 mol % of one or more polyols having 3 to 6 hydroxyl groups.
Suitable as component a) for the preparation of the copolyesters are, for example, terephthalic acid, phthalic acid, isophthalic acid, and the mono- and dialkyl esters with C
1
-C
6
-alcohols, such as dimethyl terephthalate, diethyl terephthalate and di-n-propyl terephthalate. Further examples of compounds which may be used as component a) for the preparation of the polyesters are oxalic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, maleic acid, itaconic acid, and the mono- and dialkyl esters of the carboxylic acids with C
1
-C
6
-alcohols, e.g. diethyl oxalate, diethyl succinate, diethyl glutarate, methyl adipate, diethyl adipate, di-n-butyl adipate, ethyl fumarate and dimethyl maleate. If the dicarboxylic acids which are suitable are able to form anhydrides, the anhydrides of the carboxylic acids having at least 2 carboxyl groups are also suitable as compound of component a) for the preparation of the oligoesters, e.g. maleic anhydride, phthalic anhydride or succinic anhydride. As compound of component a), particular preference is given to using terephthalic acid, phthalic acid, isophthalic acid, and the dimethyl, diethyl, dipropyl and dibutyl esters thereof. It is of course possible to use mixtures of different carboxylic acids or different esters. It is likewise also possible, for example, to use mixtures of carboxylic acids and esters, or mixtures of carboxylic acids and anhydrides in the condensation.
As component c), polyethylene glycols having molar masses of from 500 to 5000, preferably from 1000 to 3000, are used.
Suitable as component d) for the preparation of the oligoesters are water-soluble addition products of from 5 to 80 mol of at least one alkylene oxide with 1 mol of C
1
-C
24
-alcohols, C
6
-C
18
-alkylphenols or C
8
-C
24
-alkylamines. Preference is given to monomethyl ethers of polyethylene glycols. As alkylene oxides for the preparation of the compounds of component d), preference is given to using ethylene oxide, and mixtures of ethylene oxide and propylene oxide. Also suitable are mixtures of ethylene oxide together with propylene oxide and/or butylene oxide, mixtures of ethylene oxide, propylene oxide and isobutylene oxide, or mixtures of ethylene oxide and at least one butylene oxide. These water-soluble addition products of alkylene oxides are surfactants. If mixtures of alkylene oxides have been used for their preparation, then they may contain the alkylene oxides in blocks or also in random distribution.
Suitable alcohols which are alkoxylated are, for example, octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol or stearyl alcohol, but in particular methanol, and the alcohols having 8 to 24 carbon atoms obtainable by the Ziegler process, or the corresponding oxo alcohols. Of the alkylphenols, octylphenol, nonylphenol and dodecylphenol are of particular importance. Of the suitable alkylamines, use is made in particular of the C
12
-C
18
-monoalkylamines. Suitable as polyols (component e) are, for example, pentaerythritol, trimethylolethane, trimethylolpropane, 1,2,3-hexanetriol, sorbitol, mannitol and glycerol.
The oligoesters according to the invention are synthesized by processes known per se, by heating components a, b and c, and optionally d and e, with the addition of a catalyst, firstly at atmospheric pressure to temperatures of from 160 to about 220° C. The reaction is then continued under reduced pressure at temperatures of from 160 to about 240° C. with removal of excess glycols by distillation. The known transesterification and condensation catalysts of the prior art are suitable for the reaction such as, for example, titanium tetraisopropoxide, dibutyltin oxide and/or antimony trioxide/calcium acetate. For further details on carrying out the process, reference is made to EP 442 101.
Also suitable are the polyesters known from EP 241 985 which, in addition to oxyethylene groups and terephthalic acid units, contain 1,2-propylene, 1,2-butylene and/or 3-methoxy-1,2-propylene groups, and glycerol units and are terminally capped with C
1
-C
4
-alkyl groups, the soil release polymers described in EP 253 567 having a molar mass of from 900 to 9000 g/mol of ethylene terephthalate and polyethylene oxide terephthalate, where the polyethylene glycol units have molecular weights of from 300 to 3000 g/mol and the molar ratio of ethylene terephthalate to polyethylene oxide terephthalate is 0.6 to 0.95, and the polyesters containing polypropylene terephthalate and polyoxyethylene terephthalate units known from EP 272 033 and terminally capped at least proportionately by C
1
-C
4
-alkyl or acyl radicals.
Likewise preferred are oligoesters of ethylene terephthalate and polyethylene oxide terephthalate in which the polyethylene glycol units have molecular weights of from 750 to 5000 g/mol and the molar ratio of ethylene terephthalate to polyethylene oxide terephthalate is 50:50 to 90:10, and the use of which in detergents is described in German Patent DE 28 57 292, and oligoesters having molecular weights of from 15,000 to 50,000 g/mol of ethylene terephthalate and polyethylene oxide terephthalate, where the polyethylene glycol units have molecular weights of from 1000 to 10,000 g/mol and the molar ratio of ethylene terephthalate

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