C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 183/07 (2006.01) C09J 183/04 (2006.01)
Patent
CA 2061978
Docket No.: 60Sl-1449 Abstract of the Disclosure A solventless or high solids-containing organopolysiloxane composition curable to produce a pressure sensitive adhesive having high tack and high peel adhesion, comprising (A) a toluene soluble, resinous copolymer comprising R3SiO1/2 units and SiO4/2 units; (B) an alkenyl-terminated polydiorganosiloxane having a viscosity of from about 10 to about 500 centipoise at 25°C; (C) from 0 to about 90 mole % of a hydride-terminatedorganohydtogenpolysiloxane having a viscosity of from about 10 to about 1000 centipoise at 25°C; (D) from about 10 to about 100 mole % of a hydrogen- containing polydiorganosiloxane crosslinking agent; the combined average hydride equivalent weight of (C) and (D) being at least 1500 grams/silicon- bonded hydrogen atom; the mole percentages of (C) and (D) being based on the total silicon-bonded hydrogen content of (C) and (D); the total of (B), (C) and (D) being from about 25 to about 50 parts by weight; the total of (A), (B), (C) and (D) being 100 parts by weight; the ratio of silicon-bonded hydrogen atoms in (C)and (D) to olefinically unsaturated radicals in the total of (A) and (B) being in the range of from about 1.1:1 to about 15.0:1; (E) a catalytic amount of a hydrosilation catalyst; and (F) from 0 to about 40% by weight of an organic solvent.
Company General Electric
Oldham And Company
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