Method for continuously emulsifying organopolysiloxane gums

Details Method for continuously emulsifying organopolysiloxane gums Method for continuously emulsifying organopolysiloxane gums

1998-01-12

1999-08-24

Glass Moore, Margaret W.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C08K 320

Patent

active

059425741

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: 5806975 (1998-09-01), Hosokawa et al.

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