The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 2002
Filed:
Sep. 21, 1999
Volker Warzelhan, Weisenheim, DE;
Bernd Bruchmann, Ludwigshafen, DE;
Dieter Boeckh, Limburgerhof, DE;
Ursula Seeliger, Ludwigshafen, DE;
Motonori Yamamoto, Mannheim, DE;
Peter Bauer, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
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 C -C alkane diols and C -C cycloalkane diols; (a22) 85 to 0.2 mol % of an ether function-containing dihydroxy compound as in formula I HO—[(CH ) —O] —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 (M ) 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 of 25° C.) and a melting point in the range from 50 to 200° C., and with the further proviso that from 0.01 to 5 mol %, in relation to the molar quantity of the components (a) used of a compound D with at least three groups capable of ester formation are used to produce the polyether esters P1, and other biodegradable polymers and thermoplastic moulding compounds, process for their production and biodegradable mouldings, adhesives, foams and blends with starch obtainable from the polymers or moulding compounds of the invention.