Patent · US Expired

Inherently light- and heat-stabilized polyamides

US6423817B1 · kind B1 · utility

12Cited by

5References

29Claims

0Family size

Assignee

BASF SE

Inventors

Klaus Weinerth · Neustadt, DE
Karlheinz Mell · Ludwigshafen, DE
Paul Matthies · Heidelberg, DE
Ludwig Beer · Ludwigshafen, DE

Key dates

Filing date	Dec 31, 1996
Grant date	Jul 23, 2002
Priority date	—
Expiry date	Dec 31, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/30
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for preparing inherently light- and heat-stabilized polyamides comprises polymerizing in the presence of at least one triacetonediamine compound of the formula where R is hydrogen or hydrocarbyl having from 1 to 20 carbon atoms, preferably alkyl having from 1 to 18 carbon atoms, or benzyl.

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