Neutralization method for polyorganosiloxanes

Details Neutralization method for polyorganosiloxanes Neutralization method for polyorganosiloxanes

1997-12-15

1998-12-08

Shaver, Paul F.

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

Organic compounds

Silicon containing

C07F 708

Patent

active

058471804

ABSTRACT:
A method for neutralizing a polyorganosiloxane mixture. The method comprises (A) contacting a mixture comprising a polyorganosiloxane and a base with a neutralizing amount of a solid organic acid at a mixture temperature above the melting temperature of the solid organic acid forming a molten organic acid and forming an insoluble adduct of the base with the molten organic acid, (B) lowering the mixture temperature to effect solidification of residual molten organic acid to residual solid organic acid, and (C) effecting separation of the insoluble adduct and the residual solid organic acid from the polyorganosiloxane mixture. The present invention is especially useful for neutralizing mixtures comprising polyorganosiloxane mixtures where the polyorganosiloxane comprises hydrocarbyl groups bonded to silicon.

REFERENCES:
patent: 4157337 (1979-06-01), Evans
patent: 4250290 (1981-02-01), Petersen
patent: 5210254 (1993-05-01), Ritscher et al.
patent: 5659056 (1997-08-01), Hergenrother et al.

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