SYNTHESIS OF CATIONIC SILOXANE PREPOLYMERS
First Claim
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1. A method of making a cationic siloxane prepolymer, the method comprising:
- reacting a bis-halide polysiloxane with an alkyl functionalized hydroxy secondary amine in a first polar solvent to provide a first reaction product;
reacting the first reaction product with a methacrylating agent in the presence of a acid scavenger in a second polar solvent to provide a second reaction product; and
reacting the second reaction product with a quaternizing agent in a third polar solvent to provide the cationic siloxane prepolymer.
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Abstract
This application is directed toward an improved method of synthesizing cationic siloxane prepolymers as well as a specific cationic siloxane prepolymer having improved compatibility with monofunctional siloxanyl methacrylate monomers and medical devices containing the cationic siloxane prepolymer.
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25 Claims
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1. A method of making a cationic siloxane prepolymer, the method comprising:
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reacting a bis-halide polysiloxane with an alkyl functionalized hydroxy secondary amine in a first polar solvent to provide a first reaction product; reacting the first reaction product with a methacrylating agent in the presence of a acid scavenger in a second polar solvent to provide a second reaction product; and reacting the second reaction product with a quaternizing agent in a third polar solvent to provide the cationic siloxane prepolymer. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. A monomer having the following formula:
Specification