Hydrophilic copolymer of N,N-di(C.sub.1 -C.sub.2 alkyl)acrylamid

Details Hydrophilic copolymer of N,N-di(C.sub.1 -C.sub.2 alkyl)acrylamid Hydrophilic copolymer of N,N-di(C.sub.1 -C.sub.2 alkyl)acrylamid

1975-12-22

1977-07-12

Wong, Jr., Harry

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

264 1, 351160, 526230, 526273, C08F22400, C08L 3700, G02C 704

Patent

active

040353303

ABSTRACT:
A hydrophilic copolymer of an N,N-di(C.sub.1 -C.sub.2 alkyl)acrylamide is disclosed. The copolymer is formed by reacting, based on 100 parts, from about 20-80 parts of a C.sub.1 -C.sub.2 alkyl substituted acrylamide, about 10-80 parts of a C.sub.1 -C.sub.4 alkyl acrylate, methacrylate, or combinations of acrylate and methacrylate, and about 2-20 parts of a glycidyl ester of acrylic, methacrylic or crotonic acid. The resulting copolymerization product can be equilibrated with water or other aqueous solutions to form hydrogels useful in forming shaped hydrogel articles. One particular shaped article which can be formed is a hydrophilic contact lens. A process for forming the hydrogels is also disclosed.

REFERENCES:
patent: 3082178 (1963-03-01), Coover
patent: 3112296 (1963-11-01), Maeder
patent: 3563953 (1971-02-01), Lehmann et al.
patent: 3787380 (1974-01-01), Stamberger

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