Cosmetic compositions for the hair or skin based on sulfone copo

Details Cosmetic compositions for the hair or skin based on sulfone copo Cosmetic compositions for the hair or skin based on sulfone copo

1998-06-29

2000-02-29

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

424 59, 424 701, 424 7012, 424 7024, 424 707, 424 7802, 424 7803, 424 7808, A61K 700, A61K 742, A61K 706, A61K 3174

Patent

active

060306300

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to cosmetic compositions intended for use on the hair and/or the skin. They are based on sulfonated copolyesters containing polyorganosiloxane units; they can contain various other ingredients, in particular hair and/or skin conditioners. On account of their external application to the skin, these compositions can also be used to transport and/or deliver a certain number of cosmetic or pharmaceutical active products through the skin.
The expression cosmetic composition or formulation is understood to refer to any cosmetic product or preparation such as those described in Appendix I ("illustrative list by category of cosmetic products") of the European Directive No. 76/768/EEC of Jul. 27, 1976, known as the Cosmetic Directive.
The Applicant has found that certain sulfonated copolyesters containing polyorganosiloxane units are particularly suitable for use in cosmetic hair or skin compositions.
The subject of the present invention is a cosmetic hair and/or skin composition which comprises at least one water-dispersible sulfonated copolyester containing polyorganosiloxane units containing a plurality of repeating sulfonated polyester units and polyorganosiloxane units, said sulfonated copolyester containing polyorganosiloxane units having about 8000 to 35,000, to 8%, relative to said sulfonated copolyesters containing polyorganosiloxane units, and most particularly from about 0.1 to 5%, by weight relative to said sulfonated copolyesters containing polyorganosiloxane units.
Said water-dispersible sulfonated copolyester containing polyorganosiloxane units is most particularly chosen from those which can be obtained by polymerization (esterification and/or transesterification and polycondensation) of a monomer composition (M) based on: anhydride or one of its diesters, sulfonated aliphatic dicarboxylic acids (SAM), their anhydrides or their diesters and sulfonated aliphatic or sulfonated aromatic diols (SDM), containing diacid, diester or anhydride functions, and of the sulfonated or non-sulfonated monomers containing diol functions corresponding to a ratio: number of OH functions in the monomer composition
umber of COOH functions or equivalent functions in the monomer composition, from about 1.05 to 4, preferably from about 1.1 to 3.5, most particularly from about 1.8 to 3; one polydiorganosiloxane reagent of formula (I) ##STR1## in which formula the symbols R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be identical or different, represent linear or branched C.sub.1 -C.sub.16, preferably C.sub.1 -C.sub.4, alkyl radicals, C.sub.5 -C.sub.15, preferably C.sub.6 -C.sub.8, cycloalkyl radicals, phenyl radicals or alkylphenyl radicals with a C.sub.1 -C.sub.4 alkyl part, the monomer composition (M) under the conditions of the polymerization operation, about 30 to 300 and most particularly from about 50 to 200; the amounts of sulfonated monomer (SM) and of polyorganosiloxane, as well as the polymerization conditions, being such that said sulfonated copolyesters containing polyorganosiloxane units which are obtained have about 8000 to 35,000, to 8%, relative to said sulfonated copolyesters containing polyorganosiloxane units, and most particularly from about 0.1 to 5%, by weight relative to said sulfonated copolyesters containing polyorganosiloxane units.
The number-average molecular masses are measured by gel permeation chromatography, in dimethylacetamide containing 10.sup.-2 N LiBr, at 25.degree. C. The results are expressed as polystyrene equivalents.
The non-sulfonated aromatic dicarboxylic acid monomers (A) are preferably chosen from terephthalic acid, isophthalic acid and 2,6-naphthalenedicarboxylic acid, their diesters or their anhydrides.
The non-sulfonated diacid monomer (A) preferably consists of about 0 to 100 mole %, preferably from about 50 to 100 mole %, most particularly from about 70 to 90 mole %, of terephthalic acid and/or isophthalic acid and/or 2,6-naphthalenedicarboxylic acid in the form of one of its (their) lower diesters (methyl, ethyl, propyl, isopropyl, butyl)

REFERENCES:
patent: 5283296 (1994-02-01), Canivenc et al.
patent: 5320836 (1994-06-01), Singleton

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