Neutralization method for polyorganosiloxanes

Details Neutralization method for polyorganosiloxanes Neutralization method for polyorganosiloxanes

1997-09-29

1998-08-04

Shaver, Paul F.

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

Organic compounds

Silicon containing

556450, C07F 708

Patent

active

057896127

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

REFERENCES:
patent: 4816541 (1989-03-01), Koerner et al.
patent: 5239101 (1993-08-01), Bokerman et al.
patent: 5241032 (1993-08-01), Kobayashi et al.
patent: 5493041 (1996-02-01), Biggs et al.
patent: 5514828 (1996-05-01), Evans
patent: 5616756 (1997-04-01), Nakashima

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