Aliphatic polyester

Patent metadata

Field	Value
Publication number	US-9234073-B2
Application number	US-201313848961-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Sep 29, 2008
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

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.

First claim

The invention claimed is:

1. A method of producing a molded article comprising preparing a copolymer obtained by condensation of:
i) 90 to 96 mol %, based on components i) to ii), of succinic acid;
ii) 4 to 10 mol %, based on components i) to ii), 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 selected from the group consisting of glycerol, trimethylolpropane, and trimethylolethane; and
v) 0.35 to 2% by weight, based on the total weight of components i) to iii), of 1,6-hexamethylene diisocyanate, and
injection molding or blow molding the copolymer to form a molded article having a wall thickness above 200 μm.

2. The method of producing the molded article according to claim 1 , wherein component iii) is 1,4-butanediol.

3. The method of producing the molded article according to claim 1 , wherein the crosslinker is glycerol.

Assignees

• Basf Se

Inventors

• Siegenthaler Kai Oliver
• Füβl Andreas
• Skupin Gabriel
• Yamamoto Motonori

Classifications

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08K5/0016

  Plasticisers · CPC title

• C08G63/20

  Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups · CPC title

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title

• C08L69/00

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title