Novel copolymer having utility as contact lens

Details Novel copolymer having utility as contact lens Novel copolymer having utility as contact lens

1975-01-27

1977-05-10

Wong,Jr., Harry

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

20415922, 260 296R, 260 296TA, 351160, 526264, 528503, C08F22610

Patent

active

040227545

ABSTRACT:
Water-swellable lightly cross-linked copolymers, specifically terpolymers, between 3-methoxy-2-hydroxy-propyl methacrylate (G-MEMA), at least one N-vinyl lactam and at least one copolymerizable monomer to increase strength and stiffness, have utility as contact lenses. Preferred examples contain methyl methacrylate (MMA) and vinylpyrrolidone (VP) as comonomers, and up to 5% e.g. 2% of a cross-linking agent, preferably with non-equivalent functional groups such as allyl methacrylate. Preferably the water content is up to 65% based on total gel, e.g. 50-60% by weight; the VP:MMA ratio is from 50:50 to 70:30 and from 10-75% by weight G-MEMA units are present.

REFERENCES:
patent: 3532679 (1970-10-01), Steckler
patent: 3780003 (1973-12-01), Seymour et al.
patent: 3784540 (1974-01-01), Kliment et al.
patent: 3792028 (1974-02-01), Seiderman

Affiliated with

Also associated with

Rating

Novel copolymer having utility as contact lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Novel copolymer having utility as contact lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Novel copolymer having utility as contact lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1982207