Irritation mitigating polymers and uses therefor
View Patent ↗A method for increasing the efficacy of hydrophobically modified (meth)acrylic based polymers to increase the critical micelle concentration of a surfactant composition by attenuating the degree of neutralization (DN) of the polymer is disclosed.
1. A method for increasing the critical micelle concentration of a surfactant composition comprising a linear hydrophobically modified (meth)acrylic polymer, said method comprises neutralizing said polymer in said surfactant composition to a degree of neutralization ranging from about 1 to about 50% based on the acid number of said polymer and wherein a 3 wt. % mucilage of said polymer in deionized water neutralized with an 18% solution of NaOH to about pH 7 has a yield value of 0 and a Brookfield viscosity of less than 1000 mPa·s (Brookfield RVT, 20 rpm, spindle No. 1) at a temperature range of 20 to 25° C.
2. A method of claim 1 wherein said degree of neutralization ranges from about 5 to about 40% based on the acid number of said polymer.
3. A method of claim 1 wherein said degree of neutralization ranges from about 15 to about 30% based on the acid number of said polymer.
4. A method of claim 1 wherein said linear polymer is polymerized from a monomer composition comprising at least one monounsaturated carboxylic acid containing monomer and at least one hydrophobically modified, ethylenically unsaturated comonomer represented by the formula:
wherein R is selected from hydrogen and methyl; X is selected from —C(O)OR 1 and —OC(O)R 2 ; R 1 is selected from linear and branched C 1 to C 9 alkyl; and R 2 is selected from hydrogen and linear or branched C 1 to C 9 alkyl.
5. A method of claim 4 wherein said linear polymer is polymerized from a monomer composition comprising at least one of (meth)acrylic acid, itaconic acid, citraconic acid, maleic acid, fumaric acid, crotonic acid, aconitic acid; anhydrides thereof; monoesters of C 1 to C 30 alkanols thereof; and mixtures thereof.
6. A method of claim 5 wherein said at least one hydrophobically modified, ethylenically unsaturated comonomer is selected from ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, vinyl formate, vinyl acetate, 1-methylvinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl pivalate, vinyl neodecanoate, and mixtures thereof.
7. A method of claim 6 wherein said linear polymer has a molecular weight of 100,000 M n or less.
8. A method of claim 4 wherein said a hydrophobically modified ethylenically unsaturated monomer is selected from a C 1 to C 9 alkyl(meth)acrylate, and wherein said polymer has a molecular weight of 100,000 Mn or less as measured by GPC calibrated with a PMMA standard and a Brookfield viscosity of 500 mPa·s or less (Brookfield RVT, 20 rpm, spindle No. 1) at a 5 wt. % polymer solids concentration in deionized water neutralized to pH 7 with an 18 wt. % NaOH solution.
9. A method for increasing the critical micelle concentration of a household care, pet care, animal care, industrial and institutional care detersive composition comprising a surfactant and a linear hydrophobically modified (meth)acrylic polymer, said method comprises neutralizing said polymer in said surfactant composition to a degree of neutralization ranging from about 1 to about 50% based on the acid number of said polymer and wherein a 3 wt. % mucilage of said polymer in deionized water neutralized with an 18% solution of NaOH to about pH 7 has a yield value of 0 and a Brookfield viscosity of less than 1000 mPa·s (Brookfield RVT, 20 rpm, spindle No. 1) at a temperature range of 20 to 25° C.
10. A method of claim 9 wherein said degree of neutralization ranges from about 5 to about 40% based on the acid number of said polymer.
11. A method of claim 9 wherein said degree of neutralization ranges from about 15 to about 30% based on the acid number of said polymer.
12. A method of claim 9 wherein said linear polymer is polymerized from a monomer composition comprising at least one monounsaturated carboxylic acid containing monomer and at least one hydrophobically modified, ethylenically unsaturated comonomer represented by the formula:
CH 2 ═CRX
wherein R is selected from hydrogen and methyl; X is selected from —C(O)OR 1 and —OC(O)R 2 ; R 1 is selected from linear and branched C 1 to C 9 alkyl; and R 2 is selected from hydrogen and linear or branched C 1 to C 9 alkyl.
13. A method of claim 12 wherein said linear polymer is polymerized from a monomer composition comprising at least one of (meth)acrylic acid, itaconic acid, citraconic acid, maleic acid, fumaric acid, crotonic acid, aconitic acid; anhydrides thereof; monoesters of C 1 to C 30 alkanols thereof; and mixtures thereof.
14. A method of claim 13 wherein said at least one hydrophobically modified, ethylenically unsaturated comonomer is selected from ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, vinyl formate, vinyl acetate, 1-methylvinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl pivalate, vinyl neodecanoate, and mixtures thereof.
15. A method of claim 14 wherein said linear polymer has a molecular weight of 100,000 M n or less.
16. A method of claim 9 wherein said surfactant is selected from anionic surfactant(s), cationic surfactant(s), amphoteric surfactant(s), nonionic surfactant(s), and mixtures thereof.