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US 9,804,297 B2Granted
Material for contact lenses, method for manufacturing contact lenses and contact lenses obtained thereby
AssigneeBenQ Materials Corporation
InventorsFan-Dan Jan, Hsiu-Hao Chang
Life of this patent
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Abstract
The invention provides a material for contact lenses, including a first siloxane macromer shown as formula (I): wherein R1, R2 and R3 are independently C1-C4 alkyl groups, R4 is C1-C6 alkyl group, R5 is C1-C3 alkylene group, R6 is —OR7O— or —NH—, R7 and R8 are independently C1-C2 alkylene groups and m is an integer of about 1-2, n is an integer of about 4-80; at least one hydrophilic monomer; a surfactant which is an urethane (meth)acrylate containing poloxamer and an initiator.
Claims17
A material for manufacturing contact lenses comprising:
- a first siloxane macromer with the number average molecular weight in a range of 500 to 10,000, represented by the following formula (I)
- wherein R1, R2 and R3 are independently C1-C4 alkyl groups, R4 is C1-C6 alkyl group, R5 is C1-C2 alkylene group, R6 is —OR7O— or —NH—, R7, R8 are independently C1-C4 alkylene groups, m is an integer of 1 to 2 and n is an integer of 4 to 80;
- a second siloxane macromer with cross-linking functional groups in the both end caps;
- at least one hydrophilic monomer;
- a surfactant which is an urethane (meth)acrylate containing poloxamer, wherein the urethane (meth)acrylate containing poloxamer is obtained from modified poloxamer 407, modified poloxamer 124, modified poloxamer 188, or modified poloxamer 338;
- and
- an initiator.
4 more elements
A method for manufacturing contact lenses comprising:
- (a) mixing a first siloxane macromer represented by the following formula (I), a second siloxane macromer with cross-linking functional groups in the both end caps, at least one hydrophilic monomer, a surfactant which is an urethane (meth)acrylate containing poloxamer, an initiator and a solvent to form a mixture, wherein the urethane (meth)acrylate containing poloxamer is obtained from modified poloxamer 407, modified poloxamer 124, modified poloxamer 188, or modified poloxamer 338;
- and
- (b) injecting the mixture into a mold of contact lens and conducting a thermal treatment or a UV irradiating treatment to the mixture to form contact lenses;
- wherein the number average molecular weight of the first siloxane macromer of formula (I) is 500 to 10,000:
- wherein R1, R2 and R3 are independently C1-C4 alkyl groups, R4 is C1-C6 alkyl group, R5 is C1-C4 alkylene group, R6 is —OR7O— or —NH—, R7, R8 are independently C1-C2 alkylene groups, m is an integer of 1 to 2 and n is an integer of 4 to 80.
2 more elements
Dependencies are inferred from the claim text.