Modified silicone vulcanization activator

Details Modified silicone vulcanization activator Modified silicone vulcanization activator

1991-10-25

1993-04-20

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525276, 525281, 525288, 525477, 525479, 528 24, C08F 800

Patent

active

052044084

ABSTRACT:
A modified organopolysiloxane comprising [R.sup.1.sub.2 SiO.sub.2/2 ] or [R.sup.1.sub.3 SiO.sub.1/2 ] units wherein R.sup.1 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms, at least two R.sup.1 substituents per molecule being replaced by specific isocyanurate or cyanurate groups is a vulcanization activator for assisting in vulcanization of fluorocarbon rubber or fluorocarbon/silicon rubber compositions with peroxide vulcanizing agents. It is prepared by reacting triallyl isocyanurate, triallyl cyanurate or a derivative thereof with dimethylchlorosilane or methyldichlorosilane in the presence of a platinum catalyst to form a chlorosilane containing diallylisocyanurate or diallylcyanurate groups, followed by hydrolysis. An alternative process is by reacting triallyl isocyanurate, triallyl cyanurate or a derivative thereof with a siloxane in the presence of a platinum catalyst.

REFERENCES:
patent: 2679496 (1954-05-01), Bunnell
patent: 3892643 (1975-07-01), Tanaka et al.
patent: 3896123 (1975-07-01), De Zuba et al.
patent: 4980396 (1990-12-01), Yoshida

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