초록 ▼

The present invention relates to polyurethanes and a process for preparing them. These polyester polyurethanes contain units corresponding to the following formulae (I) and (II): [ STR 1 ] The polyester urethanes according to the present invention form pseudolatices which may be utilized in cosmetic

The present invention relates to polyurethanes and a process for preparing them. These polyester polyurethanes contain units corresponding to the following formulae (I) and (II): [ STR 1 ] The polyester urethanes according to the present invention form pseudolatices which may be utilized in cosmetic compositions.

대표청구항 ▼

[ What is claimed is:] [1.] An aqueous cosmetic composition having film-forming properties, comprising as film-forming resin, a neutralized non crosslinked polyester polyurethane in the form of particles in an aqueous dispersion, said aqueous dispersion being present in a proportion ranging from 0.5

[ What is claimed is:] [1.] An aqueous cosmetic composition having film-forming properties, comprising as film-forming resin, a neutralized non crosslinked polyester polyurethane in the form of particles in an aqueous dispersion, said aqueous dispersion being present in a proportion ranging from 0.5 to 30% by weight relative to the total weight of the composition, the average diameter of the particles being between 5 and 300 nm, and said non crosslinked polyester polyurethane containing units corresponding to the following formulae (I) and (II): [ STR 12 ] in which: R represents an alkylene or cycloalkylene radical or a bivalent aromatic radical having from 6 to 15 carbon atoms,n represents an integer such that the molecular weight of the recurring unit is between 400 and 5,000,R.sub.1 represents a bivalent radical selected from the group consisting of:(i) .paren open-st.CH.sub.2 .paren close-st..sub.m, m being an integer between 2 and 12, and(ii) [ STR 13 ] the movable bond being in the ortho, meta or para position, R.sub.2 represents a bivalent radical selected from the group consisting of: [ STR 14 ] R.sub.3 representing a hydrogen atom or a branched alkyl radical having from 1 to 3 carbon atoms,R.sub.4 representing a hydrogen atom or a linear or branched alkyl radical having from 1 to 4 carbon atoms,R.sub.5 representing a linear or branched alkyl radical having from 1 to 4 carbon atoms, andp being 0 or 1; [ STR 15 ] in which: R is as defined above for the units of formula (I),A represents an alkylene radical having from 2 to 20 carbon atoms, substituted with a carboxylic or sulphonic acid function, or interrupted by a tertiary nitrogen atom,and wherein said carboxylic acid or sulphonic acid function is neutralized with a neutralizing agent selected from the group consisting of an inorganic base and an organic base, and said tertiary nitrogen atom is neutralized with a neutralizing agent selected from the group consisting of an inorganic acid and an organic acid, the degree of neutralization being between 20 and 100%,the mole ratio between the units (II) and units (I) being between 1:1 and 10:1, and wherein the cosmetic composition is in the form of a nail varnish.