Thermal stabilizer for organopolysiloxane oils

Details Thermal stabilizer for organopolysiloxane oils Thermal stabilizer for organopolysiloxane oils

1986-10-09

1987-07-28

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556401, C07F 710

Patent

active

046833196

ABSTRACT:
A thermal stabilizer for organopolysiloxane oils is disclosed. The stabilizer is formed by the reaction of (A) an organopolysiloxane with (B) an aromatic aminophenol in the presence of (C) a quaternary phosphonium hydroxide, or in the presence of both the quaternary phosphonium hydroxide comprising component (C) and (D) an organopolysiloxane cyclic. Organopolysiloxane oils containing said thermal stabilizer are not subject to viscosity increases or gelation in long-term heating at high temperatures. Furthermore, such combinations show very little viscosity decline in long-term heating at high temperatures.

REFERENCES:
patent: Re28938 (1976-08-01), Koda et al.
patent: 2389803 (1945-11-01), McGregor et al.
patent: 2389804 (1945-11-01), McGregor et al.
patent: 2517536 (1950-08-01), Chenicek
patent: 2697114 (1954-12-01), Chenicek
patent: 4612055 (1986-09-01), Manis et al.

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