Bausch-lomb Incorporated

Alcon Laboratories, Inc.

Joon S Park

Gary D Friends

John B Melpolder

William G Deichert

Jay Friedrich Kunzler

Evan P Kyba

Ronald E Bambury

Dong J Choo

Edward C Holloman

A process for preparing defined molecular weight polymers, particularly polyquaternary ammonium compounds, is disclosed. As the molecular weights of these compounds can be absolutely defined, rather than defined merely in terms of 'number average molecular weight,' these compounds are particularly useful as identification standards for other polymers which are made using conventional polymerization processes. The polyquaternary ammonium compounds described are further suitable for use as antimicrobial agents, particularly in ophthalmic compositions.

Absolute molecular weight polymers and methods for their use

The invention relates to polymeric quaternary ammonium compounds which are useful as disinfectants and/or preservatives in ophthalmic compositions.

Polymeric quaternary ammonium compounds and their use as ophthalmic

Novel ultraviolet absorbing compounds useful in contact lenses and methods for curing contact lenses containing UV absorbers are disclosed.

Ultraviolet blocking agents for contact lenses

The surface wetting characteristics of polysiloxanes prepared from monomeric polysiloxanes endcapped with activated unsaturated groups and modulus modifiers are improved by the inclusion of small amounts of an N-alkenoyl trialkylsilyl aminate. The improved polymeric compositions can be used to form hard, gas permeable contact lenses and other biomedical devices.

Polysiloxane composition with improved surface wetting characteristics

Monomeric polysiloxanes endcapped with activated unsaturated groups are copolymerized with polycyclic modulus modifiers and tear film stabilizers to form hard, gas permeable, polysiloxane contact lenses and other biomedical devices.

Polysiloxane with polycyclic modifier composition and biomedical devices

Monomeric polysiloxanes endcapped with activated unsaturated groups are copolymerized with a modulus modifier and tear film stabilizers to form hard, gas permeable, polysiloxane contact lenses and other biomedical devices.

Polysiloxane composition and biomedical devices

Monomeric polysiloxanes endcapped with activated unsaturated groups are copolymerized with cycloalkyl modulus modifiers and tear film stabilizers to form hard, gas permeable, polysiloxane contact lenses and other biomedical devices.

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Rochester, NY, United States of America

Joon S Park