Method for continuous emulsifying organopolysiloxane gums

Details Method for continuous emulsifying organopolysiloxane gums Method for continuous emulsifying organopolysiloxane gums

1996-10-24

1998-09-15

Glass, Margaret W.

Agitating

Stirrer within stationary mixing chamber

Rotatable stirrer

524830, B01F 718

Patent

active

058069755

ABSTRACT:
A method of continuous emulsification that can emulsify high-viscosity organopolysiloxane gums and is capable of continuous mass production. A compounding extruder is used whose barrel 1 contains at least 2 mixing element-equipped shafts 3 installed in parallel. On each shaft elevations and depressions are formed along the axial direction and the elevations and depressions on respective shafts intermesh. Organopolysiloxane gum, emulsifying agent, and water are continuously supplied as starting materials to this compounding extruder, and an organopolysiloxane-in-water emulsion is produced by mixing and homogenizing the starting materials by subjecting them through rotation of the mixing element-equipped shafts to a shearing action at a shear rate of at least 10/second (i.e. 10 reciprocal seconds).

REFERENCES:
patent: 3575382 (1971-04-01), Loomans
patent: 4073013 (1978-02-01), Blach
patent: 5048971 (1991-09-01), Wall et al.
patent: 5302658 (1994-04-01), Gee
patent: 5466746 (1995-11-01), Geck
patent: 5505591 (1996-04-01), Tynan
patent: 5520455 (1996-05-01), Yamada et al.

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