Room-temperature curable polyorganosiloxane composition

Details Room-temperature curable polyorganosiloxane composition Room-temperature curable polyorganosiloxane composition

1993-06-25

1994-12-06

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 15, 528 19, 528 34, 528901, C08G 7706

Patent

active

053711645

ABSTRACT:
A room-temperature curable polyorganosiloxane composition comprising the following components (A) to (C): (A) 100 parts by weight of (1) a mixture of a terminally reactive polyorganosiloxane represented by the formula R.sup.1.sub.a (R.sub.2 O).sub.3-a SiZ[R.sub.2 SiO].sub.n SiR .sup.1.sub.2 ZSi(OR.sup.2).sub.3-a R.sup.1.sub.a ; (2) a silane represented by the formula R.sup.3.sub.b Si(OR.sup.4).sub.4-b or a partially hydrolyzed condensation product thereof; the amount of (A) (1) being from 85 to 100 parts by weight; (B) from 0.01 to 20 parts by weight of a curing catalyst; and (C) from 0.5 to 20 parts by weight of a polycondensation reaction product of an amino group-containing silane represented by the formula X.sub.c Si(WNH.sub.2)Y.sub.3-c and a silazane represented by the formula X.sub.d Y.sub.3-d SiNHSiY.sub.3-d X.sub.d ; where all symbols are defined in the specification.

REFERENCES:
patent: 4011360 (1977-03-01), Walsh
patent: 4536540 (1985-08-01), Dziark
patent: 4720531 (1988-01-01), Chung et al.

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