Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1982-08-09
1984-05-22
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
556453, C08F 3008, C08F13008, C08F23008
Patent
active
044502648
ABSTRACT:
There are prepared acrylates and methacrylates of the formula ##STR1## wherein R is hydrogen or methyl, y is 1 to 3, z is 0 to 2, y+z is 3, and wherein A is the unit (I) ##STR2## wherein x is 0 to 4, or the unit (II) ##STR3## with the proviso that when A is unit II, then z is zero. The novel siloxane compounds can be copolymerized with (1) a monoethylenically unsaturated monomer having a polymerizable carbon-to-carbon double bond, and (2) a cross-linking agent having at least two polymerizable, ethylenically unsaturated bonds. The resulting copolymers have high oxygen permeability and proper hydrophilic property. They can be made substantially water non-absorptive. Contact lenses fabricated from such copolymers can, if desired, be worn continuously for long periods of time.
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Kulkosky Peter F.
Polymatic Investment Corp., N.V.
Schofer Joseph L.
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