MATERIAL FORMED FROM DENDRITIC MOLECULES CONTAINING ASSOCIATIVE GROUPS

摘要

The present invention relates to a material comprising dendritic molecules each constituted of fragments that are at least bifunctional and of fragments that are of least trifunctional joined together by ester or thioester bridges, alone or in combination with amide or urea bridges, said bridges being formed from two functions carried by different fragments, said molecules containing, on the fragments located at the ends of the dendritic branches, associative end groups capable of forming associations with one another by hydrogen bonds and joined covalently to the functions that are not involved in said bridges. It also relates to the method of production thereof, as well as to its uses and to compositions, notably cosmetic, containing this material.

主权项

1. Material comprising branched molecules whose backbone has at least two branchings, wherein each molecule is constituted of fragments that are at least bifunctional, obtained from compounds (C) containing at least two functions, identical or different, and of fragments that are at least trifunctional, obtained from compounds (A) containing at least three functions, identical or different, such that these fragments are joined together by ester bridges formed on each end of the bifunctional fragments, said bridges being formed by reacting one function from compound (C) with one function from compound (A), said molecules containing moreover, on the at least trifunctional fragments located at the ends of the branches, associative end groups capable of forming associations with one another by hydrogen bonds, wherein said associative end groups are connected to the trifunctional fragments via a direct bond or via a chain, wherein said associative end groups are obtained by reacting compounds (B) bearing each at least one of such associative end groups with functions of compound (A) that have not been involved in the formation of said ester bridges, wherein the associative end groups are selected from the imidazolidonyl, triazolyl, triazinyl, bis-ureyl, and ureido-pyrimidyl groups;
and wherein the material contains at least 25% by number of said branched molecules.