Process for the production of foamed poymer particles

Details Process for the production of foamed poymer particles Process for the production of foamed poymer particles

1991-11-22

1992-07-14

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 91, 521143, C08J 918

Patent

active

051303418

ABSTRACT:
Disclosed herein is a production process of foamed polymer particles, wherein particles of a polymer, which contain a silica-alumina absorbent in which the molar ratio of SiO.sub.2 Al.sub.2 O.sub.3 is at least 1.15:1 are dispersed in a dispersion medium in the presence of carbon dioxide in a closed vessel, the resultant dispersion is heated to a temperature not lower than the softening temperature of the polymer to impregnate the polymer particles with carbon dioxide, and the polymer particles and the dispersion medium are then released into an atmosphere of a pressure lower than the internal pressure of the vessel, thereby expanding the polymer particles. The polymer may be an uncrosslinked propylene polymer, uncrosslinked, linear low-density polyethylene or crosslinked polymer.

REFERENCES:
patent: 4937271 (1990-06-01), Akamatsu et al.
patent: 4968723 (1990-11-01), Senda et al.

Affiliated with

Also associated with

Rating

Process for the production of foamed poymer particles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of foamed poymer particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of foamed poymer particles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-335000