Chemically modified polyesters and process for making

US11525045B2 · kind B2 · utility

Assignee

• DDP Specialty Electronic Materials US, LLC. · US

Inventors

• Michal Elizabeth Porter · Midland, US
• Mark A. Barger · Midland, US
• Yiyong He · Midland, US
• Stephane Costeux · Midland, US
• Gerald F. Billovits · Midland, US
• Wenyi Huang · Midland, US
• Edoardo Nicoli · Midland, US

Key dates

• Filing date: Mar 27, 2020
• Grant date: Dec 13, 2022
• Expiry date: Jan 1, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2369/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Chemically modified polyesters, foamable compositions thereof that form low density foams, and methods of making the foamable compositions and foams are disclosed. The compositions comprise an amorphous copolyester, or amorphous co-polyesterpolycarbonate or amorphous co-polyesterpolyether or combination thereof. Additionally, uses for the low density foams are disclosed.