Acid equilibration method for organcpolysiloxanes having carbon-

Details Acid equilibration method for organcpolysiloxanes having carbon- Acid equilibration method for organcpolysiloxanes having carbon-

1988-10-24

1990-01-23

Shaver, Paul F.

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

Organic compounds

Silicon containing

C07F 708, C07F 710

Patent

active

048959685

ABSTRACT:
A method is provided for the acidic equilibration of aromatic organic-substituted siloxanes, such as diphthalic anhydrode tetraorganicsiloxane with poly(aliphatic organicsiloxane) without significant cleavage of carbon-silicon-bonded aromatic organic radicals. A reduction in the generation of aromatic organic compounds, such as phthalic anhydride, can be achieved by effecting equilibration by adding the aromatic organic-substituted siloxane to a preformed mixture of acid-catalyzed poly(aliphatic organicsiloxane).

REFERENCES:
patent: 3222320 (1965-12-01), Wolf
patent: 3978104 (1976-08-01), Razzano
patent: 4260715 (1981-04-01), de Montiguy et al.
patent: 4310679 (1982-01-01), Finke et al.
patent: 4599437 (1986-07-01), Riederer

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