Thermoplastic silicone-containing hydrogels
First Claim
Patent Images
1. A thermoplastic polymer including units of the formula:
- ##STR6## wherein M is a hydrophilic radical derived from a hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000;
each R is independently selected from an alkylene group having 1 to 10 carbon atoms wherein the carbon atoms may include ether, urethane or ureido linkages therebetween;
each R'"'"' is independently selected from hydrogen, monovalent hydrocarbon radicals or halogen substituted monovalent hydrocarbon radicals wherein the hydrocarbon radicals have 1 to 18 carbon atoms which may include ether linkages therebetween;
a is an integer equal to or greater than 1;
each Z is independently a divalent urethane or ureido segment;
and x is greater than or equal to 1, and y is greater than or equal to 1.
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Abstract
Thermoplastic silicone-containing composition are useful as a hydrogel contact lens material. The compositions are based on polymers including a siloxane segment and a highly hydrophilic segment.
137 Citations
32 Claims
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1. A thermoplastic polymer including units of the formula:
- ##STR6## wherein M is a hydrophilic radical derived from a hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000;
each R is independently selected from an alkylene group having 1 to 10 carbon atoms wherein the carbon atoms may include ether, urethane or ureido linkages therebetween; each R'"'"' is independently selected from hydrogen, monovalent hydrocarbon radicals or halogen substituted monovalent hydrocarbon radicals wherein the hydrocarbon radicals have 1 to 18 carbon atoms which may include ether linkages therebetween; a is an integer equal to or greater than 1; each Z is independently a divalent urethane or ureido segment; and x is greater than or equal to 1, and y is greater than or equal to 1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- ##STR6## wherein M is a hydrophilic radical derived from a hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000;
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17. A contact lens formed of a thermoplastic polymer including units of the formula:
- ##STR8## wherein M is a hydrophilic radical derived from a hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000;
each R is independently selected from an alkylene group having 1 to 10 carbon atoms wherein the carbon atoms may include ether, urethane or ureido linkages therebetween; each R is independently selected from hydrogen, monovalent hydrocarbon radicals or halogen substituted monovalent hydrocarbon radicals wherein the hydrocarbon radicals have 1 to 18 carbon atoms which may include ether linkages therebetween; a is an integer equal to or greater than 1; each Z is independently a divalent urethane or ureido segment; and x is greater than or equal to 1, and y is greater than or equal to 1. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- ##STR8## wherein M is a hydrophilic radical derived from a hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000;
Specification