Polyurethane diacrylate compositions useful for contact lenses a

Details Polyurethane diacrylate compositions useful for contact lenses a Polyurethane diacrylate compositions useful for contact lenses a

1982-06-14

1983-10-04

Cockeram, H. S.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

20415913, 525 28, 525455, 525539, 525920, 525937, 528 75, C08G 1832, C08G 1867, C08F28304, C08G 7104

Patent

active

044080239

ABSTRACT:
Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 30 to about 95 weight percent of a hydrophilic polyurethane resin. The resulting products will form a hydrogel upon immersion in water and are permeable to gases, ions and other low molecular weight species. The hydrophilic polyurethane diacrylate compositions may be molded to form shaped products that are dimensionally stable after repeated exposure to boiling water and exhibit memory. The compositions are useful for making contact lenses and numerous forms of surgical devices, among other things.

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