Patent · US Expired

Terephthalic acid copolyesters which can be dyed in the absence of carriers

US4042570A · kind A · utility

2Cited by

1References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Claus-Rudiger Bernert · Walsrode, DE
Eduard Radlmann
Gunther Nischk · Dormagen, DE

Key dates

Filing date	Aug 26, 1975
Grant date	Aug 16, 1977
Priority date	—
Expiry date	Aug 26, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G63/672
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

High molecular weight polyesters from terephthalic acid and 1,4 cyclohexane dimethanol, containing in polycondensed form a polytetrahydrofurane diol Fibers and filaments produced from these polyesters can be dyed carrier-free.

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