Itaconate copolymeric compositions for contact lenses
First Claim
1. A copolymer useful as a contact lens material which is the polymerization product of a mixture comprising:
- (a) an itaconate;
(b) a siloxane compound represented by formula (I);
##STR7## wherein;
each A is independently an activated unsaturated radical;
each R is independently selected from the group consisting of a C1 -C12 monovalent hydrocarbon radical, a C1 -C12 monovalent hydrocarbon radical containing ether linkages, a halogen-substituted C1 -C12 monovalent hydrocarbon radical, and a halogen-substituted C1 -C12 monovalent hydrocarbon radical containing ether linkages;
each R'"'"' is independently a C1 -C22 divalent hydrocarbon radical; and
n averages about 15 to about 50;
(c) an ethylenically unsaturated, monofunctional organosiloxane monomer; and
(d) a hydrophilic monomer.
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Accused Products
Abstract
Copolymers useful as contact lens materials are the polymerization product of a mixture comprising:
(a) an itaconate;
(b) a compound represented by formula (I): ##STR1## wherein: each A is independently an activated unsaturated radical;
each R is independently selected from the group consisting of a C1 -C12 monovalent hydrocarbon radical, a C1 -C12 monovalent hydrocarbon radical containing ether linkages, a halogen-substituted C1 -C12 monovalent hydrocarbon radical, and a halogen-substituted C1 -C12 monovalent hydrocarbon radical containing ether linkages;
each R'"'"' is independently a C1 -C22 divalent hydrocarbon radical; and
n averages about 15 to about 50;
(c) an ethylenically unsaturated organosiloxane monomer; and
(d) a hydrophilic monomer.
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Citations
19 Claims
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1. A copolymer useful as a contact lens material which is the polymerization product of a mixture comprising:
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(a) an itaconate; (b) a siloxane compound represented by formula (I);
##STR7## wherein;
each A is independently an activated unsaturated radical;each R is independently selected from the group consisting of a C1 -C12 monovalent hydrocarbon radical, a C1 -C12 monovalent hydrocarbon radical containing ether linkages, a halogen-substituted C1 -C12 monovalent hydrocarbon radical, and a halogen-substituted C1 -C12 monovalent hydrocarbon radical containing ether linkages; each R'"'"' is independently a C1 -C22 divalent hydrocarbon radical; and n averages about 15 to about 50; (c) an ethylenically unsaturated, monofunctional organosiloxane monomer; and (d) a hydrophilic monomer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A rigid, gas permeable contact lens formed of a copolymer which is the polymerization product of a mixture comprising:
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(a) an itaconate; (b) a siloxane compound represented by formula (I);
##STR11## wherein;
each A is independently an activated unsaturated radical;each R is independently selected from the group consisting of a C1 -C12 monovalent hydrocarbon radical, a C1 -C12 monovalent hydrocarbon radical containing ether linkages, a halogen-substituted C1 -C12 monovalent hydrocarbon radical, and a halogen-substituted C1 -C12 monovalent hydrocarbon radical containing ether linkages; each R'"'"' is independently a C1 -C22 divalent hydrocarbon radical; and n average about 15 to about 50; and (c) an ethylenically unsaturated, monofunctional organosiloxane monomer; and (d) a hydrophilic monomer. - View Dependent Claims (16, 17, 18, 19)
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Specification