Oil-resistant, room temperature-curable organopolysiloxane compo

Details Oil-resistant, room temperature-curable organopolysiloxane compo Oil-resistant, room temperature-curable organopolysiloxane compo

1983-10-27

1984-11-27

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...

524723, 524728, 524783, 524787, 525477, C08K 535

Patent

active

044852061

ABSTRACT:
The invention provides a room temperature-curable organopolysiloxane composition comprising (a) a diorganopolysiloxane terminated at both molecular chain ends with silanolic hydroxy groups, (b) a methylpolysiloxane composed of monofunctional siloxy units Me.sub.3 SiO.sub.1/2 tetrafunctional siloxane units SiO.sub.2 in a specified molar ratio, (c) an organosilane or organopolysiloxane having at least three hydrolyzable groups bonded to the silicon atom(s) per molecule, (d) oxide, carbonate or hydroxycarbonate of zinc, and (e) a thiazole, thiuram or dithiocarbamate compound. The composition is curable by standing in air into a rubbery elastomer which is highly resistant against oils, e.g. engine oils and gear oils in automobiles, even at elevated temperatures.

REFERENCES:
patent: 3696127 (1972-10-01), Matherly

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