Patent · US Expired

Method for stabilizing organic polymers against oxidative decomposition

US4418170A · kind A · utility

1Cited by

4References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Wolfgang von Gentzkow · Kleinsendelbach, DE
Manfred Schmiedel · Bremerhaven, DE

Key dates

Filing date	Jul 19, 1982
Grant date	Nov 29, 1983
Priority date	—
Expiry date	Jul 19, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/25
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A method for stabilizing organic polymers against copper-catalyzed oxidative decomposition by means of N,N-bis-salicyloyl hydrazine as a metal deactivator is described wherein dust development of the metal deactivator is precluded with certainty and negative property changes of the stabilized organic polymers are avoided. For this purpose, it is provided that a paste which contains finely-crystalline N,N'-bis-salicyloyl hydrazine in fine distribution in a liquid to wax-like aliphatic hydrocarbon of low volatility is worked into the polymer. The method is particularly well suited for stabilizing polyolefins for cable and wire insulation.

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