Materials for contact lenses comprising a macromer having the polysiloxane structure in the side chain
AssigneeHoya Healthcare Corporation
InventorSuguru Imafuku
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Abstract
A material for contact lenses having excellent flexibility and oxygen permeability are disclosed. The material comprises a copolymer essentially comprising a siloxane macromer of component (A) which has the number-average molecular weight of from about 1,000 to 10,000 and is represented by the general formula (I), a water-insoluble monoolefin monomer of component (B), and a water-soluble monoolefin monomer of component (C). A soft contact lens which is obtained by injecting to a mold in the shape of contact lens the components (A), (B) and (C); copolymerizing the monomer mixture; and making the resulting copolymer contain water,
Claims15
A material for contact lenses which comprises a copolymer essentially comprising a siloxane macromer of component (A) which has the number-average molecular weight of from about 1,000 to 10,000 and is represented by the general formula (I):
- wherein R1, R2 and R3 are independently selected from C1-C4 alkyl groups;
- R4 is selected from C1-C6 alkyl groups;
- R5 is a residue obtained by removing NCO group from an aliphatic, alicyclic or aromatic diisocyanate;
- R6, R7, R8 and R9 are independently selected from C1-C3 alkylene groups;
- n is an integer of from 4 to 80;
- and m and p are independently an integer of from 3 to 40,
- a water-insoluble monoolefin monomer of component (B), and a water-soluble monoolefin monomer of component (C).
A soft contact lens which is obtained by injecting to a mold in the shape of contact lens a monomer mixture comprising a siloxane macromer of component (A) which has the number-average molecular weight of from about 1,000 to 10,000 and is represented by the general formula (I):
- wherein R1, R2 and R3 are independently selected from C1-C4 alkyl groups;
- R4 is selected from C1-C6 alkyl groups;
- R5 is a residue obtained by removing NCO group from an aliphatic, alicyclic or aromatic diiocyanate;
- R6, R7, R8 and R9 are independently selected from C1-C3 alkylene groups;
- n is an integer of from 4 to 80;
- and m and p are independently an integer of from 3 to 40,
- a water-insoluble monoolefin monomer of component (B), and a water-soluble monoolefin monomer of component (C);
- copolymerizing the monomer mixture;
- and making the resulting copolymer contain water.
Dependencies are inferred from the claim text.