Hydrophilic silicone rubber article and process for its preparation
First Claim
1. An improved process for hydrophilizing the surface of a molded silicone rubber article in which the silicone rubber at its surface is reacted in a catalyzed equilibration reaction with an organosiloxane, wherein the improvement comprisesusing as the organosiloxane a preformed organosiloxane containing hydroxyalkyl or protected hydroxyalkyl moieties, synthesized by reacting a siloxane containing a Si--H group with an allyloxy compound in the presence of a catalyst.
1 Assignment
0 Petitions
Accused Products
Abstract
Hydrophilic silicone rubber article, the surface of which is hydrophilized partly or completely by reaction (equilibration reaction) with organosiloxanes, the organosiloxanes being synthesized by the reaction of SiH-group-containing siloxanes with allyl compounds which contain protected OH groups. These articles are particularly useful as contact lenses and intraocular lenses.
-
Citations
12 Claims
-
1. An improved process for hydrophilizing the surface of a molded silicone rubber article in which the silicone rubber at its surface is reacted in a catalyzed equilibration reaction with an organosiloxane, wherein the improvement comprises
using as the organosiloxane a preformed organosiloxane containing hydroxyalkyl or protected hydroxyalkyl moieties, synthesized by reacting a siloxane containing a Si--H group with an allyloxy compound in the presence of a catalyst.
Specification