Novel polysiloxane-polyurethanes and contact lens thereof

Details Novel polysiloxane-polyurethanes and contact lens thereof Novel polysiloxane-polyurethanes and contact lens thereof

1988-11-03

1990-10-09

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 28, 525453, 525474, 525477, C08G 7720, C08G 77388

Patent

active

049621785

ABSTRACT:
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-polyurethanes 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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