Polysiloxane prepolymers for biomedical devices
First Claim
Patent Images
1. A hydrogel copolymer that is the hydrated polymerization product of a monomeric mixture comprising a prepolymer represented by the general formula:
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M(*Dii*PS)x*Dii*M
(I)wherein;
each M is independently a polymerizable ethylenically unsaturated radical;
each Dii is independently a diradical residue of a diisocyanate;
each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine;
each * is independently —
NH—
CO—
NH—
, —
NH—
COO—
or OCO—
NH—
; and
x is at least 2, and a hydrophilic comonomer, and wherein the hydrogel copolymer has sufficient optical quality and an oxygen permeability of at least 150 barrers.
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Abstract
A polysiloxane prepolymer that is useful for forming biomedical devices has the formula:
M(*Dii*PS)x*Dii*M (I)
wherein:
- each M is independently a polymerizable ethylenically unsaturated radical;
- each Dii is independently a diradical residue of a diisocyanate;
- each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine;
- each * is independently —NH—CO—NH—, —NH—COO— or —OCO—NH—; and
- x is at least 2.
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Citations
24 Claims
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1. A hydrogel copolymer that is the hydrated polymerization product of a monomeric mixture comprising a prepolymer represented by the general formula:
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M(*Dii*PS)x*Dii*M
(I)wherein; each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine; each * is independently —
NH—
CO—
NH—
, —
NH—
COO—
or OCO—
NH—
; and
x is at least 2, and a hydrophilic comonomer, and wherein the hydrogel copolymer has sufficient optical quality and an oxygen permeability of at least 150 barrers.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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6. The hydrogel copolymer of claim 1, wherein:
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each M is 2-ethylenemethacrylate; each Dii is the diradical residue of isophorone diisocyanate; each PS is a diradical residue of a polydimethylsiloxane-diol having Mn of at least 2000 to 3600; and each * is —
NH—
COO—
or —
OCO—
NH—
.
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7. The hydrogel copolymer of claim 1, wherein the hydrophilic monomer is selected from the group consisting of:
- unsaturated carboxylic acids;
(meth)acrylic substituted alcohols;
vinyl lactams; and
(meth)acrylamides.
- unsaturated carboxylic acids;
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8. The hydrogel copolymer of claim 7, wherein the hydrophilic monomer is selected from the group consisting of:
- methacrylic acid;
acrylic acid;
2-hydroxyethylmethacrylate;
glyceryl methacrylate;
N-vinyl pyrrolidone;
methacrylamide; and
N,N-dimethylacrylamide.
- methacrylic acid;
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9. The hydrogel copolymer of claim 1, wherein the monomeric mixture further comprises a monofunctional silicone-containing monomer.
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10. The hydrogel copolymer of claim 9, wherein the monomeric mixture further comprises methacryloxypropyl tris(trimethylsiloxy)silane.
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11. The hydrogel copolymer of claim 1, having a water content of at least 20 weight percent.
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12. The hydrogel copolymer of claim 1, having a modulus no greater than 100 g/mm2.
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13. The hydrogel copolymer of claim 1, having a water content of at least 20 weight percent, and a modulus no greater than 100 g/mm2.
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14. A biomedical device comprising a hydrogel copolymer of claim 1.
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15. The hydrogel copolymer of claim 1, wherein x is at least 2 to about 5.
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16. The hydrogel copolymer of claim 1 wherein each PS is a diradical residue of a polydimethylsiloxane-diol having Mn of at least 2000 to 3600.
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17. An ophthalmic device comprising a hydrogel copolymer that is the hydrated polymerization product of a monomeric mixture comprising a prepolymer represented by the general formula:
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M(*Dii*PS)x*Dii*M
(I)wherein; each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine; each * is independently —
NH—
CO—
NH—
, —
NH—
COO—
or OCO—
NH—
; and
x is at least 2, and a hydrophilic comonomer, and wherein the hydrogel copolymer has sufficient optical quality and an oxygen permeability of at least 150 barrers, wherein the ophthalmic device is a contact lens or an intraocular lens.- View Dependent Claims (18, 19, 20, 21)
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22. A contact lens comprising a hydrogel copolymer that is the hydrated polymerization product of a monomeric mixture comprising a prepolymer represented by the general formula:
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M(*Dii*PS)x*Dii*M
(I)wherein; each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is a diradical residue of a polydimethylsiloxane-diol having Mn of at least 2000 to 3600; each * is independently —
NH—
CO—
NH—
, —
NH—
COO—
or OCO—
NH—
; and
x is at least 2, and a hydrophilic comonomer, and wherein the hydrogel copolymer has sufficient optical quality and an oxygen permeability of at least 100 barrers.- View Dependent Claims (23, 24)
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Specification