Process for expanding microspheres

Details Process for expanding microspheres Process for expanding microspheres

1983-11-22

1985-04-23

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264DIG9, 521 56, 521 60, C08J 922

Patent

active

045131066

ABSTRACT:
A process for expanding expandable thermoplastic microspheres containing a blowing agent which will be volatilized at heating. A slurry of the unexpanded spheres is fed to a pressure zone together with steam whereby volatilization of the blowing agent occurs in the zone and the expanded microspheres are then allowed to leave the zone at a considerable pressure drop.

REFERENCES:
patent: 2944292 (1960-07-01), Norrhede
patent: 3914360 (1975-10-01), Gunderman

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