Hydrophilic polymers and contact lenses therefrom

Details Hydrophilic polymers and contact lenses therefrom Hydrophilic polymers and contact lenses therefrom

1979-07-27

1981-06-23

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 296TA, 351160H, C08F22020, C08F22054, G03B 2146

Patent

active

042751837

ABSTRACT:
There is prepared a hydrophilic water swellable, water insoluble copolymer of (1) at least 35% of a hydroxy (C.sub.2 -C.sub.4 -alkyl)-2-alkenoate, (2) 30 to 60% of a 2-alkenamide or an N, N-di (C.sub.1 -C.sub.6 -alkyl)2-alkenamide, (3) 5 to 20% of R --OR.sub.1 --.sub.x Z where R is C.sub.1 -C.sub.6 alkyl, R.sub.1 is C.sub.2 -C.sub.4 alkylene, x is an integer of 1 to 4 and Z is 2-alkenoyloxy and (4) 0.3 to 5% of a polyethylenically unsaturated crosslinking agent having a relatively long aliphatic chain, the copolymer being capable of holding 50 to 80 weight % of water. The polymers are particularly useful in preparing hydrophilic contact lenses of high burst strength and extended wear properties.

REFERENCES:
patent: 3927199 (1975-12-01), Micchelli
patent: 3927203 (1975-12-01), Seymour et al.
patent: 3948841 (1976-04-01), Dusek
patent: 3963685 (1976-06-01), Abrahams
patent: 3985697 (1976-10-01), Urbach
patent: 4038264 (1977-07-01), Rostoker et al.
patent: 4045547 (1977-08-01), Le Boeuf et al.
patent: 4059688 (1977-11-01), Rosenberg et al.
patent: 4062831 (1977-12-01), Kopecek et al.
patent: 4067839 (1978-01-01), Schultz
patent: 4074039 (1978-02-01), Lim et al.
patent: 4128520 (1978-12-01), Barabas et al.

Affiliated with

Also associated with

Rating

Hydrophilic polymers and contact lenses therefrom does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrophilic polymers and contact lenses therefrom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrophilic polymers and contact lenses therefrom will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2208834