Biodegradable polyester mixture

US9056979B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Xin Yang · 浮桥镇, CN
• Jörg Auffermann · Freinsheim, DE
• Carsten Sinkel · Mannheim, DE
• Jerome Lohmann · Landau, DE
• Robert Loos · Ludwigshafen, DE
• Gabriel Skupin · Speyer, DE
• Andreas Künkel · Neustadt, DE
• Lars Börger · Mannheim, DE

Key dates

• Filing date: Nov 8, 2013
• Grant date: Jun 16, 2015
• Expiry date: Nov 8, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/642
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is a biodegradable polyester mixture comprising 45 to 95 wt %, based on the total weight of polyester I and II, of a polyester I constructed from an aliphatic C9-C18 dicarboxylic acid or a C9-C18 dicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C3-C6 diol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 5 to 55 wt %, based on the total weight of polyester I and II, of a polyester II constructed from an aliphatic C4-C6 dicarboxylic acid or a C4-C6 dicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C3-C6 diol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 10 to 25 wt %, based on the total weight, of calcium carbonate; and 3 to 15 wt %, based on the total weight, of talc.