Aliphatic polyester

US9234073B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Kai Oliver Siegenthaler · Mannheim, DE
• Andreas Füßl · Kressbronn am Bodensee, DE
• Gabriel Skupin · Speyer, DE
• Motonori Yamamoto · Mannheim, DE

Key dates

• Filing date: Mar 22, 2013
• Grant date: Jan 12, 2016
• Expiry date: Mar 22, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L69/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of producing a molded article involving preparing a copolymer obtained by condensation of (i) 90 to 99.5 mol %, based on components i) to ii), of succinic acid; (ii) 0.5 to 10 mol %, based on components i) to ii), of 4 to 10 mol % sebacic acid; (iii) 98 to 102 mol %, based on components i) to ii), of 1,3-propanediol or 1,4-butanediol; (iv) 0.05 to 0.5% by weight, based on the total weight of components i) to iii), of a crosslinker; and (v) 0.35 to 2% by weight, based on the total weight of components i) to iii), of 1,6-hexamethylene diisocyanate. The copolymer is injection molded or blow molded to form a molded article having a wall thickness above 200 μm.