Liquid silicone resin compositions

Details Liquid silicone resin compositions Liquid silicone resin compositions

1989-03-28

1990-05-29

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...

528 23, 556462, 556467, 556469, C08F28300

Patent

active

049296914

ABSTRACT:
Solventless liquid silicone resin compositions are prepared by first reacting a mixture of (A) a polydimethylsiloxane and (B) a methyltrialkoxysilane in the presence of (C) an equilibrating amount of a perfluoroalkane sulfonic acid; hydrolyzing the reaction product formed with sufficient water to provide from about 0.48 to about 0.81 mole of residual alkoxy functionality per 100 parts by weight of said liquid silicone resin; and neutralizing the acid catalyst. Alternatively, the above components can be similtaneously reacted and then neutralized to form the resins of the present invention. The liquid silicone resins are storage stable, have low viscosities and can be cured to form heat-resistant protective coatings on substrates.

REFERENCES:
patent: 3624030 (1971-11-01), Pruvost et al.
patent: 3846358 (1974-11-01), Roedel
patent: 4113665 (1978-09-01), Law et al.
patent: 4160858 (1979-07-01), Roedel
patent: 4508887 (1985-04-01), Kohl
patent: 4780338 (1988-10-01), Saad et al.

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