Diesters or polyesters of naphthalene dicarboxylic acid for...

Details Diesters or polyesters of naphthalene dicarboxylic acid for... Diesters or polyesters of naphthalene dicarboxylic acid for...

C - Chemistry, Metallurgy

08

G

C08G 63/189 (2006.01) A61K 8/85 (2006.01)

Patent

CA 2397330

A hair-treating composition containing a diester or polyester of a naphthalene dicarboxylic acid having compound formula (I), (II), (III) or mixtures; for imparting gloss and/or hair color stabilization, wherein each R1, same or different, is an alkyl group having 1 to 22 carbon atoms, a diol having the structure HO-R2-OH, or a polyglycol having the structure HO-R3-(-O-R2-)m-OH, wherein R2 and R3, same or different, are each an alkylene group, straight chain or branched, having 1 to 6 carbon atoms, and wherein m and n are each 1 to about 100, or a mixture thereof. These diesters and polyesters of formula (I) or (II) are quite effective in stabilizing the dibenzoylmethane derivative UV-A filter compounds making them more effective, and effective for longer periods of time.

L'invention concerne une composition de traitement des cheveux renfermant un diester ou un polyester d'un acide dicarboxylique de naphtalène de formule de composés (I), (II), (III) ou des mélanges, ladite composition permettant d'intensifier l'aspect brillant des cheveux et/ou de stabiliser leur couleur. Dans lesdites formules (I), (II), (III), chaque R?1¿, identique ou différent, représente un groupe alkyle renfermant 1 à 22 atomes de carbone, un diol doté de la structure HO-R?2¿-OH, ou un polyglycol doté de la structure HO-R?3¿-(-O-R?2¿-)¿m?-OH; R?2¿ et R?3¿, identiques ou différents, représentent respectivement un groupe alkylène, une chaîne droite ou ramifiée dotée de 1 à 6 atomes de carbone; et m et n sont respectivement compris entre 1 et environ 100, ou un mélange correspondant. Ces diesters et polyesters de formule (I) ou (II) sont suffisamment efficaces pour stabiliser les composés de filtrage des UV-A dérivés du dibenzoylméthane, ce qui les rend encore plus efficaces, et ce pour des périodes de temps plus importantes.

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