Substantially homogeneous copolymers of vinyl pyrrolidone and N-

Details Substantially homogeneous copolymers of vinyl pyrrolidone and N- Substantially homogeneous copolymers of vinyl pyrrolidone and N-

1994-12-28

1997-03-11

Webman, Edward J.

Drug, bio-affecting and body treating compositions

Solid synthetic organic polymer as designated organic active...

Aftertreated polymer

424 47, 424DIG1, 424DIG2, 424 7015, 526264, 5263285, A61K 711, C08F 210, C08F22060, C08F22610

Patent

active

056098650

ABSTRACT:
Substantially homogeneous copolymers comprising 20-99% of vinyl pyrrolidone (VP) and 1-80% of N-3,3-dimethylaminopropyl methacrylamide, (DMAPMA), preferably 50-95% VP and 5-50% DMAPMA, and, most preferably, about 80:20, by weight, having a weight average molecular weight of about 200,000 to 1,500,000, as a clear, low viscosity aqueous solution of the homogeneous copolymer, at a 5-20% solids level, preferably about 10-15%, by weight of the solution, having a viscosity of about 5,000 to 80,000 cps, preferably about 10,000 to 70,000 cps. The solution obtained herein has lower viscosity and better clarity, and provides hair care products with enhanced curl retention (hold), when compared to non-homogeneous copolymers of the same composition, or related existing commercial products.

REFERENCES:
patent: 4039734 (1977-08-01), Hendy
patent: 4223009 (1980-09-01), Chakrabarti
patent: 4923694 (1980-05-01), Shih et al.
patent: 5045617 (1991-09-01), Shih et al.

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