Method of producing optically clear hydrophilic copolymers and c

Details Method of producing optically clear hydrophilic copolymers and c Method of producing optically clear hydrophilic copolymers and c

1977-06-07

1978-08-22

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 296H, 351160, 526320, C08F22020, C08L 3102, C02B 300

Patent

active

041090705

ABSTRACT:
In the process of making optically clear hydrophilic copolymers formed by copolymerizing a glycol monoester of acrylic or methacrylic acid with an alkoxy monomer having the formula: ##STR1## wherein R is a C.sub.1 -C.sub.4 straight or branched chain alkoxy group, R' is a C.sub.2 or C.sub.3 straight or branched chain alkylene group, X is hydrogen or a methyl group, m is either 1 or 0, and n is an integer from 1 to 20, the improvement comprising distilling at least said alkoxy monomer under high vacuum and low temperature prior to copolymerization, promptly adding to said distilled monomer an amount of polymerization inhibitor below that which would inhibit copolymerization, but sufficient to provide a hydrated copolymer of high optical clarity, and then copolymerizing said monomer and said glycol monoester to form said hydrophilic copolymer. The invention also comprises the improved method of making hydrophilic buttons and contact lenses, particularly corneal contact lenses, from said hydrophilic copolymers.

REFERENCES:
patent: 3784540 (1974-01-01), Kliment et al.
patent: 3822089 (1974-07-01), Wichterle
patent: 3893988 (1975-07-01), Seymour et al.

Affiliated with

Also associated with

Rating

Method of producing optically clear hydrophilic copolymers and c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing optically clear hydrophilic copolymers and c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing optically clear hydrophilic copolymers and c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1559610