Elastomer-forming compositions comprising alkoxylated MQ resins

Details Elastomer-forming compositions comprising alkoxylated MQ resins Elastomer-forming compositions comprising alkoxylated MQ resins

1990-01-10

1992-02-25

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...

525479, 528 33, 528 17, C08F28300

Patent

active

050914847

ABSTRACT:
This invention discloses elastomer-forming compositions which have a low viscosity in the uncured state while retaining good physical properties when cured. They comprise an .alpha.,.omega. hydroxyl, trialkoxy or alkylenetrialkoxy end-blocked polydiorganosiloxane, a MQ silicone resin having tetrafunctional units of the formula SiO.sub.2 and monovalent units of the formula R.sub.a R'.sub.3-a SiO.sub.1/2 wherein R' denotes a group of the general formula --R"Si(OR.sup.*).sub.3, with R" being an alkylene group and R.sup.* an alkyl group and wherein a has a value of 2 or 3, preferably 2 for up to 30% of all monovalent units and a titanium catalyst.

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