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:
-
- (Danville, CA)
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 874792
- Patent Number(s):
- 6461550
- Assignee:
- Sandia National Laboratories (Livermore, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP
- 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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}