Method of forming a foamed thermoplastic polymer

Details Method of forming a foamed thermoplastic polymer Method of forming a foamed thermoplastic polymer

1984-11-21

1986-09-23

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 60, 521 841, 521 87, 521 88, 521134, C08J 912, C08J 914

Patent

active

046136290

ABSTRACT:
A method of forming a foamed thermoplastic polymer. A solid thermoplastic lymer is immersed in an immersant solution comprising a compatible carrier solvent and an infusant solution containing an incompatible liquid blowing agent for a time sufficient for the immersant solution to infuse into the polymer. The carrier solvent is then selectively extracted, preferably by a solvent exchange process in which the immersant solution is gradually diluted with and replaced by the infusant solution, so as to selectively leave behind the infusant solution permanently entrapped in the polymer. The polymer is then heated to volatilize the blowing agent and expand the polymer into a foamed state.

REFERENCES:
patent: 2744291 (1956-05-01), Stastny et al.
patent: 2893163 (1959-07-01), Cleland et al.
patent: 3085073 (1963-04-01), Litner et al.
patent: 3994840 (1976-11-01), Kajimura et al.
patent: 4376751 (1983-03-01), Duchane

Affiliated with

Also associated with

Rating

Method of forming a foamed thermoplastic polymer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of forming a foamed thermoplastic polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a foamed thermoplastic polymer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-766760