Biodegradable polymers, the preparation thereof and the use thereof for the production of biodegradable moldings

US5863991A · kind A · utility

Assignee

• BASF SE

Inventors

• Volker Warzelhan · Bad Dürkheim, DE
• Gunnar Schornick · Neuleiningen, DE
• Matthias Kroner · Eisenberg, DE
• Ursula Seeliger · Ludwigshafen, DE
• Motonori Yamamoto · Mannheim, DE
• Gerhard G. Ramlow · Grosse Ile Township, US

Key dates

• Filing date: Jul 3, 1997
• Grant date: Jan 26, 1999
• Expiry date: Jul 3, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W90/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Biodegradable polyetheresteramides Q1 with a molecular weight (M.sub.n) in the range from 6000 to 80,000 g/mol, a viscosity number in the range from 30 to 450 g/ml (measured in o-dichlorobenzene/phenol (50/50 ratio by weight) at a concentration of 0.5% by weight polyetheresteramide Q1 at 25.degree. C.), and a melting point in the range from 50.degree. to 200.degree. C., obtained by reacting a1) from 95 to 99.9% by weight polyetheresteramide P1, obtained by reacting a mixture of PA1 b1) 20-95 mol % adipic acid or ester-forming derivatives thereof, and PA2 5-80 mol % terephthalic acid or ester-forming derivatives thereof, and PA1 b2) a mixture of a dihydroxy compound selected from C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols, PA1 b22) a dihydroxy compound which contains ether functionalities and has the formula I EQU HO--((CH.sub.2).sub.n --O)).sub.m --H I where n is 2, 3 or 4 and m is an integer from 2 to 250, and PA1 b23) from 0.5 to 80 mol % of an amino-C.sub.2 -C.sub.12 -alkanol or an amino-C.sub.5 -C.sub.10 -cycloalkanol, with or without PA1 b24) a diamino-C.sub.1 -C.sub.8 -alkane, and/or PA1 b25) a 2,2'-bisoxazoline where the molar ratio of (b1) to (b2)…