Acrylic hair fixative copolymers and compositions
A hair fixative composition comprising a film forming polymer that is prepared from monomers comprising (a) 10-30% by weight of one or more copolymerizable comonomers selected from the group consisting of N-alkyl (meth)acrylamide wherein the alkyl group thereof contains from 2 to 12 carbon atoms, wherein for at least one of said copolymerizable comonomers the alkyl group contains from 5 to 12 carbon atoms; (b) 14-21% by weight of copolymerizable comonomers comprising acrylic acid and optionally one or more acidic copolymerizable comonomers selected from the group consisting of methacrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, and the (C 1 -C 4 )alkyl half esters of maleic and fumaric acids; and (c) 40-76% by weight two or more copolymerizable comonomers selected from the group consisting of (C 1 -C 12 )alkyl(meth)acrylates, wherein at least one of said two or more copolymerizable comonomers is a (C 1 -C 2 )alkyl(meth)acrylate; said film forming polymer being optionally completely or partially neutralized with a basic reagent.
1. A hair fixative composition comprising a film forming polymer that is prepared from:
(a) 26% to 30% by weight of N-tert-octylacrylamide;
(b) 12.5% to 20% by weight of acrylic acid and 0% to 7.5% by weight of methacrylic acid, wherein the film forming polymer is prepared from acrylic acid and methacrylic acid in a combined total of 19.2% to 20% by weight;
(c) 15% to 25% by weight of isobutylmethacrylate and 24.5% to 39.3% by weight of methylmethacrylate, wherein the film forming polymer is prepared from isobutylmethacrylate and methylmethacrylate in a combined total of 49.9% to 54.7% by weight; and
(d) 0% to 0.1% by weight of tert-butylaminoethylmethacrylate.
2. The hair fixative composition of claim 1 , wherein the film forming polymer is selected from the group consisting of film forming polymers A, B, C, D, E, and F comprising a copolymer of monomers according to the following table:
Polymer
t-OA
AA
MAA
iBMA
MMA
t-BAEMA
A
30
12.5
7.5
25
25
0
B
30
12.5
7.5
24.95
24.95
0.1
C
30
12.5
7.5
24.95
24.95
0.1
D
26
14
6
15
38.9
0.1
E
26
20
0
15
38.9
0.1
F
26
14.5
4.7
15.4
39.3
0.1
wherein
t-OA represents N-tert-octylacrylamide;
AA represents acrylic acid;
MAA represents methacrylic acid;
iBMA represents isobutylmethacrylate;
MMA represents methylmethacrylate; and
tBAEMA represents tert-butylaminoethylmethacrylate; and
the numbers given in the table each represent percentages by weight, in each case based on a total weight of the film forming polymer.
3. The hair fixative composition of claim 2 , wherein the film forming polymer is selected from the group consisting of film forming polymers D, E, and F comprising a copolymer of monomers according to the following table:
Polymer
t-OA
AA
MAA
iBMA
MMA
t-BAEMA
D
26
14
6
15
38.9
0.1
E
26
20
0
15
38.9
0.1
F
26
14.5
4.7
15.4
39.3
0.1
wherein
t-OA represents N-tert-octylacrylamide;
AA represents acrylic acid;
MAA represents methacrylic acid;
iBMA represents isobutylmethacrylate;
MMA represents methylmethacrylate; and
tBAEMA represents tert-butylaminoethylmethacrylate; and
the numbers given in the table each represent percentages by weight, in each case based on a total weight of the film forming polymer.
4. The hair fixative composition of claim 1 , wherein from 50 to 100% of the available carboxyl groups of the polymer are neutralized.
5. The hair fixative composition of claim 1 wherein the composition is in an aerosol spray and further comprises a solvent and an aerosol propellant therefor.
6. A process for fixing hair comprising applying to the hair the hair fixative composition of claim 1 .