Copolymers and their use in personal care compositions
The present invention relates to a copolymer derived from the polymerization of a) at least one cationic monomer of formula (I), where in R 1 is hydrogen or methyl, R 2 is hydrogen or C 1 -C 4 alkyl, R 3 , R 4 and R 5 are independently from each other hydrogen or C 1 -C 4 alkyl, n is a integer from 1-5, and Y is a counterion, and b) at least one monomer of formula (II) wherein R 6 signifies hydrogen or methyl, and R 7 , R 8 and R 9 signify independently from each other hydrogen or C 1 -C 4 alkyl, with the proviso that at least one of the substituents R 6 , R 7 , R 8 and R 9 and C 1-4 alkyl and c) optionally at least one cross-linking agent, which contains at least two ethylenically unsaturated moieties, as well as to their use in personal care product and to the personal care products.
1. A process of thickening a water- and/or oil based hair conditioner composition by adding a copolymer consisting of the components
(a) 40-90 wt-% of a cationic monomer of formula (I),
wherein
R 1 and R 2 are hydrogen,
R 3 , R 4 and R 5 are methyl,
n is 1, 2 or 3, and
Y is a counterion,
and
(b) 10-40 wt-% of a monomer of formula (II)
wherein
R 6 signifies hydrogen,
R 7 signifies hydrogen, and
R 8 and R 9 are methyl,
and
(c) at least one cross-linking agent, which contains at least two ethylenically unsaturated moieties to the hair conditioner composition.
2. The process according to claim 1 , wherein the amount of c) is 50-500 ppm, based on the total amount of the copolymer.
3. The process according to claim 1 characterized in that
Y is Cl; Br; I; hydrogensulfate or methosulfate.
4. The process according to claim 1 , characterized in that
(c) is at least one cross-linking agent selected from the group consisting of tetra allyl ammonium chloride; allyl-acrylamides and allyl-methacrylamides; bisacrylamidoacetic acid and N,N′-methylene-bisacrylamide.
5. The process according to claim 4 , wherein the amount of c) is 50-500 ppm, based on the total amount of the copolymer.
6. The process according to claim 1 , characterized in that c) is present in an amount of 100-300 ppm, based on the total amount of the copolymer and is selected from tetra allyl ammonium chloride and/or N,N′-methylene-bisacrylamide.
7. The process according to claim 1 which composition comprises:
0.5-10 wt-% of the copolymer,
2-25 wt-% of at least one oil-component,
0-25 wt-% of at least one adjuvant and/or additive, and
water up to 100 wt-%.
8. The process according to claim 1 , which composition comprises
0.5-10 wt-% of the copolymer,
50-99 wt-% of at least one oil-component, and
0-25 wt-% of at least one adjuvant and/or additive.