Process for the preparation of organopolysiloxane copolymers

Details Process for the preparation of organopolysiloxane copolymers Process for the preparation of organopolysiloxane copolymers

1991-03-18

1992-10-06

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 25, 524773, 524777, 556467, 556457, 556479, C08G 7706

Patent

active

051532930

ABSTRACT:
An improved process is provided for the preparation of siloxane-oxyalkylene block copolymer surfactant compositions which utilize a hydrosilylation reaction with a monocarboxylate ester of an alkanediol as the reaction solvent. The reaction solvent need not be removed from the block copolymer, particularly when the block copolymer is used as a surfactant for polyurethane foam formulations. 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate is the preferred reaction solvent.

REFERENCES:
patent: 3280160 (1966-10-01), Bailey
patent: 3401192 (1968-09-01), Kollonitsch
patent: 3518288 (1970-06-01), Haluska
patent: 3980688 (1976-09-01), Litteral et al.
patent: 4122029 (1978-10-01), Gee et al.
patent: 4857583 (1989-08-01), Austin et al.
patent: 4877854 (1989-10-01), Hattori et al.

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