SILOXANE PREPOLYMER CONTAINING PENDANT AND END-CAPPING CATIONIC AND POLYMERIZABLE GROUPS

Abstract

The present invention relates to polymeric compositions useful in the manufacture of biocompatible medical devices. More particularly, the present invention relates to certain cationic random copolymers capable of polymerization to form polymeric compositions having desirable physical characteristics useful in the manufacture of ophthalmic devices. Such properties include the ability to extract the polymerized medical devices with water. This avoids the use of organic solvents as is typical in the art. The polymer compositions comprise siloxane prepolymer containing pendant and end-capping cationic and polymerizable groups.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

None

Claims

1. A random copolymer of formula (I):

2. The monomer of claim 1 wherein X− is selected from the group consisting of Cl−, Br−, I−, CF3CO2−, CH3CO2−, HCO3−, CH3SO4−, p-toluenesulfonate, HSO4−, H2PO4−, NO3−, CH3CH(OH)CO2−, SO42−, O32−, HPO42− and mixtures thereof.

3. The monomer of claim 1 wherein X− is at least a single charged counter ion and is selected from the group consisting of Cl−, Br−, I−, CF3CO2−, CH3CO2−, HCO3−, CH3SO4−, p-toluenesulfonate, HSO4−, H2PO4−, NO3−, and CH3CH(OH)CO2− and mixtures thereof.

4. The monomer of claim 1 wherein the monomer is selected from the group consisting of monomers having the following formulae:

5. A monomer mix useful for making polymerized biomaterials comprising at least one random copolymer of claim 1 and at least second monomer.

6. The monomer mix of claim 5, further compromising in addition to the second monomer a hydrophobic monomer and a hydrophilic monomer.

7. The monomer mix of claim 5 wherein the second monomer is selected from the group consisting of unsaturated carboxylic acids; methacrylic acids, acrylic acids; acrylic substituted alcohols; 2-hydroxyethylmethacrylate, 2-hydroxyethylacrylate; vinyl lactams; N-vinyl pyrrolidone (NVP), N-vinyl caprolactone; acrylamides; methacrylamide, N,N-dimethylacrylamide; methacrylates; ethylene glycol dimethacrylate, methyl methacrylate, allyl methacrylate; hydrophilic vinyl carbonates, hydrophilic vinyl carbamate monomers; hydrophilic oxazolone monomers, methacryloxypropyl tris(trimethylsiloxy)silane, ethylene glycol dimethacrylate (EGDMA), allyl methacrylate (AMA) and mixtures thereof.

8. A device comprising the random copolymer of claim 1 as a polymerized comonomer.

9. The device of claim 8 wherein the device is a contact lens.

10. The device of claim 8 wherein the contact lens is a rigid gas permeable contact lens.

11. The device of claim 8 wherein the lens is a soft contact lens.

12. The device of claim 8 wherein the lens is a hydrogel contact lens.

13. The device of claim 8 wherein the lens is an intraocular lens.

14. The device of claim 13 wherein the lens is a phakic intraocular lens.

15. The device of claim 13 wherein the lens is an aphakic intraocular lens.

16. The device of claim 8 wherein the device is a corneal implant.

17. The device of claim 8 wherein the device is selected from the group consisting of heart valves, intraocular lenses, films, surgical devices, vessel substitutes, intrauterine devices, membranes, diaphragms, surgical implants, blood vessels, artificial ureters, artificial breast tissue, membranes for kidney dialysis machines, membranes for heart/lung machines, catheters, mouth guards, denture liners, ophthalmic devices, and contact lenses.

18. A method of making a device comprising: providing a monomer mixture comprising the random copolymer of claim 1 and at least a second monomer;subjecting the monomer mixture to polymerizing and shaping conditions to provide a polymerized device;extracting the polymerized device; andpackaging and sterilizing the polymerized device.

19. The method of claim 18 wherein the step of extracting is performed with non-flammable solvents.

20. The method of claim 19 wherein the extraction solvent is water.