Patent · US Expired

Modified polyesters

US4178277A · kind A · utility

28Cited by

5References

34Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Peter Gebauer · Troisdorf, DE
Wilhelm Kaufer · Troisdorf, DE
Herbert Klinkenberg
Hilde Sontgerath · Troisdorf, DE

Key dates

Filing date	Jun 14, 1978
Grant date	Dec 11, 1979
Priority date	—
Expiry date	Jun 14, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G63/916
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A modified polyester composition comprising the condensation product of terephthalic acid or a polyester-forming derivative thereof and a diol, said polyester having an arithmetical mean molecular weight M.sub.n or more than 17,000, a carboxyl equivalent of at least 10 mVal/kg, a nitrogen content of less than 0.4 weight percent and urethane groups linked linearly to said polyester; a process for preparing such modified polyester and a molding composition comprising such modified polyester and an additive, suitably a filler and in particular glass fibers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.