Hydrophilic polysiloxane compositions

Details Hydrophilic polysiloxane compositions Hydrophilic polysiloxane compositions

1998-06-09

2000-01-11

Dawson, Robert

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524315, 524493, 524730, 524731, 524773, 524789, 528 15, G08L 8306

Patent

active

060137118

ABSTRACT:
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.degree. dynamic advancing contact angles of less than about 100.

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