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US 4,261,875 AGranted
Contact lenses containing hydrophilic silicone polymers
AssigneeAmerican Optical Corporation
InventorAlbert R. LeBoeuf
Life of this patent
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Abstract
Homopolymers and copolymers of compounds according to the formula; ##STR1## wherein R is an alkyl having 1 to 3 carbons, a+b+c+d=e, b=0 to e, c=0 to e, b+c>1, d=0 to 5, e=1 to 100, and Y is an organic group containing at least one >C=C< are hydrophilic as well as exhibiting properties similar to silicone compounds. The polymers are particularly useful in contact lenses having enhanced oxygen permeability.
Claims8
A solid polymer comprising a polymerization product of a hydrophilic siloxane having the formula:
- ##STR21## wherein R is an alkyl having 1 to 3 carbons, a+b+c+d=e, b=0 to e, c=0 to e, b+c>1, d=0 to 5, e=1 to 100, and Y is an organic group containing at least one >C=C<.
Dependencies are inferred from the claim text.