Acrylic polymer
The present invention relates to acrylic emulsion polymers having excellent hair styling properties as well as their use in hair care preparations in particular hair styling preparations.
1. A cosmetic composition comprising:
(a) an acrylic emulsion polymer which is an emulsion polymerized reaction product of a monomer mixture of raw monomer materials consisting of methacrylic acid, n-butyl methacrylate, ethyl acrylate, ethyl methacrylate, and less than 5 wt. %, based on 100 wt. % of the monomer mixture, of impurities or additives which may be present in the raw monomer materials, and
(b) a cosmetically acceptable carrier.
2. The cosmetic composition according to claim 1 , wherein the composition comprises 0.01-20 wt. %, based on total weight of the cosmetic composition, of the acrylic emulsion polymer.
3. The cosmetic composition according to claim 2 , wherein the composition comprises 0.05-10 wt. % of the acrylic emulsion polymer.
4. The cosmetic composition according to claim 1 , wherein the monomer mixture consists of 10-30 wt. % of methacrylic acid, 40-60 wt. % of n-butyl methacrylate, 5-15 wt. % of ethyl acrylate and 10-30 wt. % of ethyl methacrylate, and less than 5 wt. % of impurities or additives, based on 100 wt. % of the monomer mixture.
5. The cosmetic composition according to claim 1 , wherein the monomer mixture consists of 17-22 wt. % of methacrylic acid, 45-56 wt. % of n-butyl methacrylate, 9-15 wt. % of ethyl acrylate and 15-25 wt. % of ethyl methacrylate, and less than 5 wt. % of impurities or additives, based on 100 wt. % of the monomer mixture.
6. The cosmetic composition according to claim 1 , wherein the ethyl methacrylate (EMA) and ethyl acrylate (EA) in the monomer mixture are present in an amount to provide a coefficient of EMA to EA (w/w) in a range of 4 to 1.
7. The cosmetic composition according to claim 6 , wherein the coefficient of EMA to EA (w/w) is in the range of 2 to 1.
8. The cosmetic composition according to claim 6 , wherein the coefficient of EMA to EA (w/w) is in the range of about 2.0 to 1.3.
9. The cosmetic composition according to claim 1 , wherein the methacrylic acid in the monomer composition is present in an amount less than 25 wt. %.
10. A hair styling preparation which comprises the cosmetic composition according to claim 1 .
11. The hair styling preparation according to claim 10 , wherein the hair styling preparation is in the form of a styling cream, styling gel, liquid hair-setting preparation, hair foams or hairspray.
12. The hair styling preparation according to claim 10 , wherein the hair styling preparation is an aerosol hairspray.
13. The hair styling preparation according to claim 10 , which further comprises at least one additional hair fixative resin.
14. A hair styling polymer which comprises an acrylic emulsion polymer which is an emulsion polymerization reaction product of a monomer mixture consisting of methacrylic acid, n-butyl methacrylate, ethyl acrylate and ethyl methacrylate, and less than 5 wt. % of impurities or additives, based on 100 wt. % of the monomer mixture.