Gels formed by the interaction of polyvinylpyrrolidone with chit

Details Gels formed by the interaction of polyvinylpyrrolidone with chit Gels formed by the interaction of polyvinylpyrrolidone with chit

1994-01-13

1995-05-30

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

514 55, 5147727, 514777, 514944, 523122, 524 27, 536 20, 424286, 424426, C08G 6348, C08G 6391

Patent

active

054201977

ABSTRACT:
A composition includes a stable gel of neutralized chitosan and poly(N-vinyl lactam), the poly(N-vinyl lactam) having a K value of at least about 60 and mole equivalents of acid groups above about 1.4 from ring-opened pyrrolidones. The composition may also include a substrate and various additives incorporated with the gel. A method for making the gel includes mixing the chitosan and poly(N-vinyl lactam) in aqueous solution and curing. Products include wound packings, wound dressings, burn dressings, drug delivery dressings, cosmetic face masks and cosmetic wrap dressings.

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A. Conix and G. Smets, "Ring Opening in Lactam Polymers", J. Poly. Chem. 13, 221-229 (1955).
H. P. Frank "The Lactam-Amino Acid Equilibria for Ethylpyrrolidone and Polyvinylpyrrolidone", Journal of Polymer Science 12, 565-576 (1954).
General Aniline & Film Corporation Technical Bulletin 7583-033, "PVP".

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