Method of polymerizing polydiorganosiloxane fluid-filler mixture

Details Method of polymerizing polydiorganosiloxane fluid-filler mixture Method of polymerizing polydiorganosiloxane fluid-filler mixture

1983-03-14

1984-11-13

Marquis, Melvyn I.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524862, 524863, 524847, 524493, 528 23, 528 24, 528 33, 528 37, C08L 8304

Patent

active

044826702

ABSTRACT:
A method of polymerizing an oligomer comprising a polydiorganosiloxane, polydiorganocyclosiloxane, or mixture thereof in the presence of reinforcing filler using a catalytic amount of sulfuric or sulfonic acid is described. The sulfonic acid is of the formula XSO.sub.3 H wherein X is selected from the group consisting of halogen, alkyl, aryl, alkoxy, and alkaryl radicals. The dispersion of reinforcing filler in polydiorganosiloxane is produced using less energy, with fewer manufacturing steps than current commerical processes. The silicone polymer-filler mixture produced by this method is useful as electrical insulation compounds, in greases, and in producing curable compositions useful as sealants, caulking compounds, and heat curable silicone elastomeric compositions.

REFERENCES:
patent: 2469883 (1949-05-01), Marsden et al.
patent: 3078255 (1963-02-01), Pike
patent: 3294725 (1966-12-01), Findlay et al.

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