The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1999
Filed:
Jun. 30, 1997
Laurence Sebillote-Arnaud, L'Hay Les Roses, FR;
Raluca Lorant, Thiais, FR;
L'Oreal, Paris, FR;
Abstract
The invention relates to a cosmetic or dermatological composition containing at least one active principle precursor capable of releasing an active principle by enzymatic reaction on contact with the Stratum corneum and at least one crosslinked poly(2-acrylamido-2-methylpropanesulphonic acid) polymer neutralized to at least 90% and to its uses. It generally contains, distributed randomly: (a) from 90 to 99.9% by weight of units of formula (1): ##STR1## in which X.sup.+ denotes a cation or a mixture of cations, it being possible for at most 10 mol % of the cations X.sup.+ to be protons H.sup.+ ; and (b) from 0.01 to 10% by weight of crosslinking units resulting from at least one monomer having at least two olefinic double bonds, the proportions by weight being defined with respect to the total weight of the polymer.