Curable composition

Details Curable composition Curable composition

1992-09-08

1993-06-29

Kight, III, John

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

Synthetic resins

From silicon reactant having at least one...

25218214, 525409, 528 33, 528 35, C08G 7712

Patent

active

052235971

ABSTRACT:
A curable composition comprising (A) a reactive silicon group-containing oxypropylene polymer having a ratio of Mw.sup.1 /Mn.sup.1 of higher than 1.6 and (B) a reactive silicon group-containing oxypropylene polymer having a ratio of Mw.sup.2 /Mn.sup.2 of not higher than 1.6 and a number-average molecular weight (Mn.sup.2) of not less than the number-average molecular weight (Mn.sup.1) of the oxypropylene polymer (A). A problem caused by the high viscosity of the oxypropylene polymer having a ratio of Mw.sup.1 /Mn.sup.1 of higher than 1.6 can be solved and the viscosity the polymer (A) before curing can be lowered without greatly lowering excellent rubber elasticity of cured articles by mixing the polymer (A) with the oxypropylene polymer (B) having a ratio of Mw.sup.2 /Mn.sup.2 of not higher than 1.6.

REFERENCES:
patent: 4302571 (1981-11-01), Arai et al.
Database WPIL, Abstract, AN 88-171026 Derwent Publications Ltd., London, GB; of JP-A-63 108 058 (Toshiba Silicone KK) May 12, 1988.

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