Polysiloxane-polyurethanes and contact lenses thereof

Details Polysiloxane-polyurethanes and contact lenses thereof Polysiloxane-polyurethanes and contact lenses thereof

C - Chemistry, Metallurgy

08

G

402/17, 400/2006

C08G 18/61 (2006.01) A61K 9/70 (2006.01) A61L 15/26 (2006.01) C08G 18/10 (2006.01) C08G 18/63 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2001969

A novel polysiloxane polyurethane is described which is obtained by reaction of an isocyanate capped polysiloxane prepolymer with a polysiloxane-disilanol and which contains O-silyl-urethane linkages. The novel polysiloxane-poly-urethanes are useful as oxygen permeable membranes or films, as bandages and drug carriers, for example in transdermal drug delivery, and especially as highly oxygen permeable, soft contact lenses.

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