Process for preparing a silicone resin-modified phenolic resin

Details Process for preparing a silicone resin-modified phenolic resin Process for preparing a silicone resin-modified phenolic resin

1990-08-23

1993-01-05

Seidleck, James J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525474, 525485, 525487, C08F28312, C08G 7704, C08G 810

Patent

active

051771578

ABSTRACT:
A two-step process for the preparation of a silicone resin-modified phenolic resin is disclosed wherein an alkoxysilane-modified phenolic resin is first prepared by reacting an alkoxysilane with a phenolic resin. In a subsequent step, the alkoxysilane-modified phenolic resin is hydrolyzed and condensed by heating and stirring it with water. The resulting silicone resin-modified phenolic resin, which is free of diorganopolysiloxane units, has excellent heat resistance and excellent electrical insulating properties.

REFERENCES:
patent: 4022753 (1971-05-01), Lohse et al.
patent: 4474930 (1984-10-01), Mikami et al.
patent: 4657951 (1987-04-01), Takarada et al.
patent: 4808483 (1989-02-01), Nakasuji et al.
W. Noll, Chemistry and Technology of Silicones (1968), pp. 197 and 371.

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