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Title: Method of forming a foamed thermoplastic polymer

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.

Inventors:
 [1];  [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865993
Patent Number(s):
4613629
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; forming; foamed; thermoplastic; polymer; solid; lymer; immersed; immersant; solution; comprising; compatible; carrier; solvent; infusant; containing; incompatible; liquid; blowing; agent; time; sufficient; infuse; selectively; extracted; preferably; exchange; process; gradually; diluted; replaced; leave; permanently; entrapped; heated; volatilize; expand; blowing agent; time sufficient; solution containing; solution comprising; thermoplastic polymer; exchange process; selectively extract; compatible carrier; foamed thermoplastic; solid thermoplastic; plastic polymer; liquid blowing; /521/

Citation Formats

Duchane, David V, and Cash, David L. Method of forming a foamed thermoplastic polymer. United States: N. p., 1986. Web.
Duchane, David V, & Cash, David L. Method of forming a foamed thermoplastic polymer. United States.
Duchane, David V, and Cash, David L. Wed . "Method of forming a foamed thermoplastic polymer". United States. https://www.osti.gov/servlets/purl/865993.
@article{osti_865993,
title = {Method of forming a foamed thermoplastic polymer},
author = {Duchane, David V and Cash, David L},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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