Expansion of polymeric microspheres insitu in a rigid PUR/PIR fo

Details Expansion of polymeric microspheres insitu in a rigid PUR/PIR fo Expansion of polymeric microspheres insitu in a rigid PUR/PIR fo

1998-09-22

2000-02-08

Niland, Patrick D.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

264 451, 264 453, 521 54, 523200, B29D 3100, B29C 3500, C08J 300, C08K 900, C08L 7500

Patent

active

060229128

ABSTRACT:
The present invention relates to a process for producing a dispersion of polymeric microspheres in a polyol comprising expanding 1 to 70% by weight of polymeric beads in a polyol with a twin screw extruder to simultaneously mix and expand the beads to create a uniform dispersion of the microspheres in the polyol such that the wetting of the microspheres by the polyol is maximized.

REFERENCES:
patent: 5424014 (1995-06-01), Glorioso et al.
patent: 5665785 (1997-09-01), McClellan et al.

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