Storage-stable curable hydrophilic polysiloxane compositions

Details Storage-stable curable hydrophilic polysiloxane compositions Storage-stable curable hydrophilic polysiloxane compositions

C - Chemistry, Metallurgy

08

L

C08L 83/07 (2006.01) A61K 6/093 (2006.01) A61K 6/10 (2006.01) C08L 83/04 (2006.01) C08L 83/12 (2006.01)

Patent

CA 2240924

The instant invention provides a method for improving the miscibility of the lower molecular weight unsaturated siloxane - polyether copolymers with the .alpha., .omega.-divinylpolysiloxanes without loss of storage stability, or delay of cure at the vulcanization temperature, or loss of permanent hydrophilicity or other desirable features of the cured polysiloxane. The compositions of the present invention comprise one or more .alpha., .omega.-divinylpolysiloxanes, unsaturated polysiloxane - polyether copolymers having from 2 to 5 silicon atoms per molecule which are preferably trisiloxanes, and a compatibilizing additive. The permanently hydrophilic, rapidly wettable polysiloxane compositions yield static water contact angles < 50° dynamic advancing contact angles of less than about 100.

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