Printer Friendly

Improved foams.

U.S. Patent 8,329,294 (December 11, 2012), "Styrene-Modified Polypropylene Type Resin Particle, Foamable Styrene-Modified Polypropylene Type Resin Particle, Styrene-Modified Polypropylene Type Resin Foamed Particle, Styrene-Modified Polypropylene Type Resin Foamed Molded Product, and Production Methods thereof," Shinji Ishida, and Masahiko Ozawa (Sekisui Plastics Co., Ltd., Osaka, Japan).

Polystyrene foams are very common, but have poor chemical resistance and impact resistance. In contrast, polypropylene foams have excellent chemical resistance and impact resistance, but poor stiffness. Ishida and Ozawa developed a styrene-modified polypropylene foam with good stiffness, chemical resistance and impact strength. This material contains 30 to 600 parts by weight polystyrene per 100 parts poly-propylene, preferably a propylene-ethylene copolymer. The polystyrene is dispersed as 5 micron or less particles in the polypropylene matrix.

COPYRIGHT 2013 Society of Plastics Engineers, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2013 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:INDUSTRY PATENTS; recieved patent
Author:Corneliussen, Roger
Publication:Plastics Engineering
Article Type:Brief article
Date:Mar 1, 2013
Words:123
Previous Article:Processable performs.
Next Article:Processable Polylactic Acid (PLA) materials.
Topics:

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters