Curable organopolysiloxane compositions

Details Curable organopolysiloxane compositions Curable organopolysiloxane compositions

1978-08-16

1980-04-01

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

260 37SB, 528 31, 528 32, 528 33, 528 34, 528 43, 428429, 428428, 428447, 428448, C08G 7706

Patent

active

041962737

ABSTRACT:
The present invention presents a novel curable organopolysiloxane composition capable of being adhesively bonded firmly to the surface of various substrates with which it has been in contact during its curing by heating without the primer treatment of the surface. The composition is essentially composed of a diorganopolysiloxane terminated at both chain ends with vinyl groups as the base component, optionally, in combination of a copolymeric organopolysiloxane composed of vinyl-containing monofunctional siloxane units and tetrafunctional siloxane units SiO.sub.2, an organohydrogen-polysiloxane having at least three silicon-bonded hydrogen atoms per molecule as a crosslinking agent by the addition reaction with the vinyl groups in the base component, a platinum catalyst to accelerate the above addition reaction and an alkoxy silane having an aliphatically unsaturated group which serves as a "self-bonding" improver in the composition with or without the addition of a filler.

REFERENCES:
patent: 3814731 (1974-06-01), Nitzsche et al.
patent: 3892707 (1975-07-01), Itoh et al.
patent: 4045390 (1977-08-01), Itoh et al.
patent: 4077943 (1978-03-01), Sato et al.

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