Patent ID: 7456246

Claim:
A hydrophilic polyorganosiloxane composition, curable by means of a hydrosilylation reaction, comprising (A) a curable organopolysiloxane having a silicon atom-bonded alkenyl group and containing 10 to 50 mol % of diphenylsiloxane units or 20 to 50 mol % of methylphenylsiloxane units as a whole of component (A), (B) an organohydrogenpolysiloxane as a curing agent for curing the organopolysiloxane (A), (C) a polyether having the compositional formula (1): R 1 O(C 2 H 4 O) m (C 3 H 6 O) n R 1 (1) wherein R 1 is C 3 H 6 SiR 2 k (OR 2 ) 3-k (wherein R 2 is a monovalent hydrocarbon group and k is 0, 1, 2 or 3, wherein at least one R 2 is an alkenyl group) or an alkenyl group, two R 1 groups may be the same or different, m is an integer of 0 to 100, n is an integer of 0 to 350, and the sum of m+n is an integer of 3 to 350, and the polyether further comprises a polyether in which R 1 in formula (1) is hydrogen, C 3 H 6 SiR 2 k (OR 2 ) 3-k , or a monovalent hydrocarbon group and R 2 is a monovalent hydrocarbon group, provided that neither R 1 nor R 2 is an alkenyl group, and (D) an addition reaction catalyst, wherein said compositions cures to form a cured product having a contact angle of up to 55° as measured according to JIS R3257.