Water-free preparation process for multimodal thermoplastic polymer foam and foam therefrom

US6787580B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Yohannes Chonde · Midland, US
• Daniel D. Imeokparia · Midland, US
• John Bernard Horstman · Midland, US
• Robert A. Kirchhoff · Midland, US
• Kyung W. Suh · Seoul, KR

Key dates

• Filing date: Sep 28, 2001
• Grant date: Sep 7, 2004
• Expiry date: Jul 6, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2471/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Prepare a multimodal thermoplastic polymer foam having a distribution of large and small cells in a substantial absence of water by using a blowing agent stabilizer. Multimodal foams of the present invention have blowing agent stabilizer predominantly located proximate to large cells. The resulting multimodal foams have particular utility as thermal insulating materials.