Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1993-01-05
1994-04-26
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 31, 528 32, C08G 7706, C08G 7712, C08G 7720
Patent
active
053067975
ABSTRACT:
The present organopolysiloxane composition comprises (A) an organopolysiloxane in which 5 to 30 mol % of the molecule ends is made up of an (R.sup.1).sub.3 Si.sub.0.5 unit and 95 to 70 mol % of the molecule ends is made up of at least one unit selected from the group consisting of an R.sup.1 (R.sup.2).sub.2 SiO.sub.0.5 unit, an (R.sup.1).sub.2 R.sup.2 SiO.sub.0.5 unit, and an (R.sup.2).sub.3 SiO.sub.0.5 unit, in which units R.sup.1 represent a vinyl group and R.sup.2 represents a hydrocarbon group excluding aliphatic unsaturated groups, (B) an organohydrogenpolysiloxane having two or more Si--H groups in the molecule, and (C) an addition reaction catalyst. By curing this composition, a gel cured product having high resistance to poisoning by solder fluxes can be obtained.
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Bleutge John C.
Dean Karen A.
Shin-Etsu Chemical Co. , Ltd.
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