Hydrophilic polysiloxane compositions
First Claim
1. A composition comprising a first component comprising:
- (a) a polydiorganosiloxane that contains at least two hydrosilylatable unsaturated hydrocarbon groups per molecule;
(b) an effective amount of hydrosilylation catalyst;
(c) a hydrophilic, unsaturated polysiloxane-polyether copolymer having from 2 to 5 silicon atoms, at least one aliphatic unsaturation and at least one-polyether functionality; and
(d) a compatibilizing additive.
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Accused Products
Abstract
The instant invention provides a method for improving the miscibility of the lower molecular weight unsaturated siloxane-polyether copolymers with the α, ω-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 α, ω-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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Citations
10 Claims
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1. A composition comprising a first component comprising:
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(a) a polydiorganosiloxane that contains at least two hydrosilylatable unsaturated hydrocarbon groups per molecule; (b) an effective amount of hydrosilylation catalyst; (c) a hydrophilic, unsaturated polysiloxane-polyether copolymer having from 2 to 5 silicon atoms, at least one aliphatic unsaturation and at least one-polyether functionality; and (d) a compatibilizing additive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification