Low VOC hair spray compositions containing terpolymers of vinyl pyrrolidone, vinyl caprolactam and 3-(N-dimethylaminopropyl) methacrylamide
AssigneeISP Investments Inc.
InventorsKou-Chang Liu, Colleen M. Rocafort, Lowell R. Anderson, Yakir Reuven
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Abstract
Low VOC hair spray resin compositions containing homogeneous terpolymers of vinyl pyrrolidone, vinyl caprolactam and 3-(N-dimethylaminopropyl) methacrylamide are described. The hair spray compositions are made using a solution of the terpolymer which is clear and low in viscosity, and which provides a spray of relative small particle size. The hair spray compositions exhibit an effective high humidity curl retention property.
Claims17
A homogeneous polymerization process for forming a clear solution of a hair fixative resin which is a homogeneous terpolymer of vinyl pyrrolidone (VP), vinyl caprolactam (VCL) and 3-(N-dimethylaminopropyl) methacrylamide (DMAPMA) monomers, in a compositional range of 60-95% VCL, 1-20% VP and 1-10% DMAPMA, by weight in alcohol or water, or mixtures thereof, at a solids content of 10-70%, having a clarity of less than 10 NTU, and a Brookfield viscosity of less than 300,000 cps, at a polymerization temperature of about 65.degree. C., for about 5 hours, in the presence of a radical initiator at a pH of about 7.5, which consists essentially of the steps of:
- (a) charging a reactor with VCL, optionally with an amount of VP and/or DMAPMA, and
- (b) introducing VP and DMAPMA incrementally into the reactor wherein the rate of disappearance of VCL, VP and DMAPMA are matched during the polymerization.
A 55% VOC pump hair spray composition comprising about 2-10 wt. % of the homogeneous terpolymer of claim 5, 55 wt. % or less of alcohol, and the rest water and adjuvants.
A 55% VOC aerosol hair spray composition comprising about 1-10 wt. % of the homogeneous terpolymer of claim 7, 20 wt. % or less alcohol and 35 wt. % or less propellant, the rest water and adjuvants.
Dependencies are inferred from the claim text.