Terpolymer of (a) crotonic acid (b) vinyl acetate and (c) allyl or methallyl esters
AssigneeL'oreal
InventorsChristos Papantoniou, Jean-Claude Grognet
Life of this patent
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Abstract
Terpolymer of crotonic acid, vinyl acetate and an allyl or methallyl ester having the formula ##STR1## wherein R' is hydrogen or CH.sub.3, R.sub.1 is a saturated hydrocarbon chain containing 1-6 carbon atoms and R.sub.2 is --CH.sub.3 or --CH(CH.sub.3).sub.2, with the proviso that the sum of the number of carbon atoms in R.sub.1 + R.sub.2 is equal to or less than 7. The terpolymer is employed with a cosmetic carrier or vehicle to provide a cosmetic composition for the hair, such as a hair lacquer or hair setting lotion, generally in amounts of about 1-4 weight percent of the composition.
Claims9
Terpolymer of
- a. crotonic acid,
- b. vinyl acetate and
- c. an allyl or methallyl ester of the formula ##STR3## wherein R' is selected from the group consisting of hydrogen and --CH.sub.3,
- R.sub.1 is a saturated hydrocarbon chain, linear or branched, having 1-6 carbon atoms, and
- R.sub.2 is selected from the group consisting of --CH.sub.3 and --CH(CH.sub.3).sub.2, with the proviso that the sum of the number of carbon atoms in R.sub.1 and R.sub.2 is equal to or less than 7.
A process for preparing a terpolymer comprising copolymerizing in an aqueous suspension in the presence of an effective amount of a polymerization catalyst, monomers consisting of crotonic acid, vinyl acetate and an allyl or methallyl ester having the formula ##STR4## wherein R' is selected from the group consisting of hydrogen and --CH.sub.3, R.sub.1 is a saturated hydrocarbon chain, linear or branched, having 1-6 carbon atoms and R.sub.2 is selected from the group consisting of --CH.sub.3 and --CH(CH.sub.3).sub.2, with the proviso that the sum of the number of carbon atoms in R.sub.1 and R.sub.2 is equal to or less than 7.
Dependencies are inferred from the claim text.