Patent · US Expired

Polyester and polyester carbonate from terephthalic or isophthalic acid, phosgene and phenols with heat resistance and light stability

US5110895A · kind A · utility

1Cited by

0References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Richard Weider · Leverkusen, DE
Dieter Arlt · Cologne, DE
Christian Leuschke · Dormagen, DE
Thomas Scholl · New Haven, US

Key dates

Filing date	Aug 13, 1990
Grant date	May 5, 1992
Priority date	—
Expiry date	Aug 13, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G63/64
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyester and polyester carbonates corresponding to the following formula ##STR1## in which R.sup.1 to R.sup.4, o to r, n, a and b and also X.sup.1 and Y.sup.1 are as defined in the specification, PA0 may be obtained by interfacial condensation from bisphenols corresponding to the following formula. ##STR2## aromatic dicarboxylic acid chlorides corresponding to the following formula ##STR3## and phosgene. The new polyesters and polyester carbonates combine outstanding heat resistance and light stability. They may be used both as thermoplastic materials as such or as constituents of polymer blends or even as UV (light) stabilizers or as UV (light)-stabilizing coatings. Accordingly, they have degrees of polycondensation n in the range from 2 to 100.

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