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

US5817721A · 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
• Rainer Buschl · Böhl-Iggelheim, DE

Key dates

• Filing date: May 12, 1997
• Grant date: Oct 6, 1998
• Expiry date: May 12, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/60
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A biodegradable polyester obtainable by reacting a mixture comprising PA1 (a1) from 95 to 99.9% by weight of a polyester P1 obtainable by reacting a mixture essentially comprising PA2 (b1) a mixture comprising PA3 35-95 mol % of adipic acid or ester-forming derivatives thereof, PA3 5-65 mol % of terephthalic acid or ester-forming derivatives thereof, and PA3 0-5 mol % of a compound containing sulfonate groups, and PA2 (b2) a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols, PA1 with the proviso that a compound D with at least three groups capable of ester formation is employed to prepare the polyester P1, PA1 (a2) from 0.1 to 5% by weight of a divinyl ether C1 and PA1 (a3) from 0 to 5 mol %, based on component (b1) from the preparation of P1, of compound D, PA1 and other biodegradable polymers and thermoplastic molding compositions, processes for the preparation thereof, the use thereof for producing biodegradable moldings and adhesives.