Hydrophilized cellulose esters, process for their preparation, t

Details Hydrophilized cellulose esters, process for their preparation, t Hydrophilized cellulose esters, process for their preparation, t

1983-12-27

1985-07-30

Kight, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 38, 524 39, 524 40, 524 41, 523106, 523108, 527300, 527311, 527312, 527314, 351160R, C08L 110, C08L 2308, C08L 3104, A61F 100

Patent

active

045322775

ABSTRACT:
Contact lenses and implants for human medicine can be fabricated from a polymer blend comprising 98-80% by weight of component A and 2-20% by weight of component B wherein:
component A is a cellulose ester of an aliphatic carboxylic acid with up to 40% by weight of total component A of an ethylene/vinyl acetate copolymer having 30-98% by weight, relative to ethylene/vinyl acetate, of incorporated vinyl acetate and
component B is a homopolymer or copolymer of water-soluble vinyl monomers and up to 10% by weight relative to the total polymer B of multifunctional crosslinker vinyl compounds.

REFERENCES:
patent: 4193897 (1980-03-01), Wingler et al.
patent: 4360635 (1982-11-01), Alberts et al.

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