B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
88/40, 402/9, 26
B29D 11/02 (2006.01) A61L 27/18 (2006.01) A61L 27/50 (2006.01) C07F 7/10 (2006.01) C07F 7/18 (2006.01) C08F 30/08 (2006.01) C08F 283/12 (2006.01) C08K 5/54 (2006.01) G02B 1/04 (2006.01)
Patent
CA 1235136
- 1 - POLYSILOXANE COMPOSITION WITH IMPROVED SURFACE WETTING CHARACTERISTICS AND BIOMEDICAL DEVICES MADE THEREOF ABSTRACT OF THE DISCLOSURE The surface wetting characteristics of polysiloxanes prepared from monomeric polysiloxanes endcapped with ac- tivated unsaturated groups and modulus modifiers are improved by the inclusion of small amounts of an N-alkenoyl trialkyl- silyl aminate. The improved polymeric compositions can be used to form hard, gas permeable contact lenses and other biomedical devices. BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to hard, gas permeable, biomedi- cal devices including contact lenses prepared from polysiloxanes polymerized with a modulus modifier and an N-alkenoyl trialkylsilyl aminate wetting agent. 2. Prior Art Statement U. S. patent 4,153,641 discloses contact lenses made from polymers and copolymers comprising poly(organo-siloxane) polymers and copolymers formed by polymerizing a poly(organosiloxane) monomer alpha,omega terminally bonded through divalent hydrocarbon groups to polymerized, free radical polymerizably activated, unsaturated groups forming a polymer in a crosslinked network. Additionally, specific comonomers are disclosed which include lower esters of acrylic and methacrylic acid, styryls and N-vinyl pyr- rolidinone which may be copolymerized with the above described poly(organosiloxane) to form a copolymer. The instant invention preferred polysiloxane monomers include the same poly(organosiloxane) monomers described above.
448379
Friends Gary D.
Kunzler Jay F.
Melpolder John B.
Park Joon S.
Bausch & Lomb Incorporated
Gowling Lafleur Henderson Llp
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