Low-irritation compositions and methods of making the same
View Patent ↗Provided are compositions comprising a low molecular weight, non-crosslinked, linear acrylic copolymer and at least one surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, and combinations of two or more thereof, and methods of using such compositions.
1. A personal care composition comprising a low molecular weight, non-crosslinked, linear acrylic copolymer derived from at least one first monomeric component selected from the group consisting of (meth)acrylic acid and at least one second monomeric component selected from the group consisting of one or more C 1 to C 9 alkyl (meth)acrylates, and at least one surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, nonionic surfactants and combinations of two or more thereof, wherein said composition comprises from 0.025 to about 4.5 weight percent of said low molecular weight copolymer and said low molecular weight copolymer has a number average molecular weight of about 100,000 or less.
2. The composition of claim 1 having a clarity of at least about 90% transmittance.
3. The composition of claim 1 having a clarity of at least about 95% transmittance.
4. The composition of claim 1 having a turbidity of less than about 20 NTU.
5. The composition of claim 1 having a turbidity of less than about 10 NTU.
6. The composition of claim 1 wherein said copolymer and said at least one surfactant exhibit a C 90 that is greater than about 250 mg/L.
7. The composition of claim 1 wherein said copolymer and said at least one surfactant exhibit a C 90 that is greater than about 500 mg/L.
8. The composition of claim 1 wherein said copolymer has a number average molecular weight of from about 5,000 to about 80,000.
9. The composition of claim 1 wherein said copolymer has a number average molecular weight of from about 10,000 to about 50,000.
10. The composition of claim 1 wherein said copolymer has a viscosity of 500 mPa·s or less at a 5 wt. % polymer solids concentration in deionized water and neutralized to pH 7 with an 18 wt. % NaOH solution.
11. The composition of claim 1 wherein said second monomeric component is selected from the group consisting of ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, vinyl acetate, 1-methylvinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl pivalate, vinyl neodecanoate, and mixtures of two or more thereof.
12. The composition of claim 1 wherein the ratio of said first monomer component to said second monomer component ranges from about 20:80 wt. % to about 50:50 (wt./wt.) based on the total weight of the monomers in the polymerization medium.
13. The personal care product of claim 1 wherein said product is selected from the group consisting of shampoos, washes, baths, gels, lotions, creams, wipes, and combinations of two or more thereof
14. A method of cleansing at least a portion of the human body comprising applying a composition of claim 1 to the body.
15. The composition of claim 1 wherein said composition comprises from about 0.1 to about 4.5 active weight percent of said low molecular weight copolymer.
16. The composition of claim 15 wherein said second monomeric component comprises ethyl acrylate.