Acrylic hair setting resins having high resistance to moisture and rapid removability from the hair with shampoo
AssigneeRohm and Haas Company
InventorsDavid R. Gehman, William A. Kirn
Life of this patent
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Abstract
Acrylic polymer solutions having superior properties when used as hair setting or holding resins are disclosed. Specific polymers disclosed are derived from (1) alkyl acrylates with 2-8 carbon alkyl groups, (2) methyl methacrylate, (3) hydroxyethyl methacrylate, and (4) methacrylic acid in proportions yielding a film forming resin readily soluble in shampoo, with a Tg between about 40.degree. C. and 80.degree. C., a molecular weight between about 25,000 and 250,000 and not more than 50 ppm of unreacted alkyl acrylate monomer.
Claims10
A hair setting composition for application to human hair to cosmetically set and hold the same for a reasonable period of time and which is readily removable therefrom by shampoo treatment which comprises (A) a film forming copolymer of (1) 10-30% by weight of an alkyl acrylate having a straight or branched chain alkyl group of 2 to less than 8 carbon atoms or mixture thereof, (2) 41-60% by weight of methyl methacrylate, (3) 5-20% by weight of hydroxyethyl methacrylate, and (4) 12-30% methacrylic acid, which copolymer has a calculated glass transition temperature, Tg, within the range of about 40.degree.-80.degree. C., a molecular weight within the range of about 25,000 to 250,000, and not more than about 50 ppm of unreacted alkyl acrylate monomer, and (B) a cosmetically acceptable organic solvent for said film forming copolymer, wherein (A) is dissolved in (B) in an amount of 1 to 15% by weight of the composition with the required amount of organic amine neutralizer to achieve acceptable performance.
A water insoluble, shampoo soluble hair setting polymer which comprises (a) 10-30% by weight of an alkyl acrylate having a straight or branched chain alkyl group of 2 to less than 8 carbon atoms or mixtures thereof (b) 41-60% by weight of methyl methacrylate, (c) 5-20% by weight of hydroxyethyl methacrylate and (d) 12-30% by weight of methacrylic acid.
Dependencies are inferred from the claim text.