Biodegradable polymers, the production thereof and the use thereof for producing biodegradable moldings

US6414108B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Volker Warzelhan · Bad Dürkheim, DE
• Bernd Bruchmann · Ludwigshafen, DE
• Dieter Boeckh · Schifferstadt, DE
• Ursula Seeliger · Ludwigshafen, DE
• Motonori Yamamoto · Mannheim, DE
• Peter Bauer · Ludwigshafen, DE

Key dates

• Filing date: Sep 21, 1999
• Grant date: Jul 2, 2002
• Expiry date: Sep 21, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/40
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Biodegradable polyether esters P1 obtainable by the reaction of a mixture consisting essentially of: (a1) a mixture essentiall) of 20 to 95 mol % adipic acid or ester-forming derivatives thereof or mixtures thereof, 5 to 80 mol % terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and 0 to 5 mol % of a sulphonate group-containing compounds In which the sum of the individual mol percentages is 100; and (a2) a mixture of dihydroxy compounds consisting essentially of (a21) 15 to 99 mol % of a dihydroxy compound selected from the group consisting of C2-C6 alkane diols and C5-C10 cycloalkane diols; (a22) 85 to 0.2 mol % of an ether function-containing dihydroxy compound as in formula I HO—[(CH2)n—O]m—H in which n is 2, 3 or 4 and m is a whole number from 2 to 250, or mixtures thereof, in which the molar ratio of (a1) to (a2) is in the range from 0.4:1 to 1.5:1 with the proviso that the polyether esters P1 have molar weight (Mn) in the range from 5,000 to 80,000 g/mol, a viscosity index in the range from 30 to 450 g/ml (measured in o-dichlorobenzole/phenol (weight ratio 50/50) at a concentration of 0.5 wt. % polyether esters P1 at a temperature o…