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Title: Method for forming a uniformly dense polymer foam body

Abstract

A method for providing a uniformly dense polymer foam body having a density between about 0.013 .sup.g /.sub.cm.sup..sub.3 to about 0.5 .sup.g /.sub.cm.sup..sub.3 is disclosed. The method utilizes a thermally expandable polymer microballoon material wherein some of the microballoons are unexpanded and some are only partially expanded. It is shown that by mixing the two types of materials in appropriate ratios to achieve the desired bulk final density, filling a mold with this mixture so as to displace all or essentially all of the internal volume of the mold, heating the mold for a predetermined interval at a temperature above about 130.degree. C., and then cooling the mold to a temperature below 80.degree. C. the molded part achieves a bulk density which varies by less then about .+-.6% everywhere throughout the part volume.

Inventors:
 [1]
  1. (Danville, CA)
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
874792
Patent Number(s):
US 6461550
Assignee:
Sandia National Laboratories (Livermore, CA)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; forming; uniformly; dense; polymer; foam; providing; density; 0013; supg; subcmsupsub3; 05; disclosed; utilizes; thermally; expandable; microballoon; material; microballoons; unexpanded; partially; expanded; shown; mixing; types; materials; appropriate; ratios; achieve; bulk; final; filling; mold; mixture; displace; essentially; internal; volume; heating; predetermined; interval; temperature; 130degree; cooling; below; 80degree; molded; achieves; varies; -6; throughout; polymer foam; /264/521/

Citation Formats

Whinnery, Jr., Leroy. Method for forming a uniformly dense polymer foam body. United States: N. p., 2002. Web.
Whinnery, Jr., Leroy. Method for forming a uniformly dense polymer foam body. United States.
Whinnery, Jr., Leroy. Tue . "Method for forming a uniformly dense polymer foam body". United States. https://www.osti.gov/servlets/purl/874792.
@article{osti_874792,
title = {Method for forming a uniformly dense polymer foam body},
author = {Whinnery, Jr., Leroy},
abstractNote = {A method for providing a uniformly dense polymer foam body having a density between about 0.013 .sup.g /.sub.cm.sup..sub.3 to about 0.5 .sup.g /.sub.cm.sup..sub.3 is disclosed. The method utilizes a thermally expandable polymer microballoon material wherein some of the microballoons are unexpanded and some are only partially expanded. It is shown that by mixing the two types of materials in appropriate ratios to achieve the desired bulk final density, filling a mold with this mixture so as to displace all or essentially all of the internal volume of the mold, heating the mold for a predetermined interval at a temperature above about 130.degree. C., and then cooling the mold to a temperature below 80.degree. C. the molded part achieves a bulk density which varies by less then about .+-.6% everywhere throughout the part volume.},
doi = {},
url = {https://www.osti.gov/biblio/874792}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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