Patent · US Expired

Polyacetal compositions containing a non-meltable polymer stabilizer improved with at least one amide-containing phenolic antioxidant

US4972014A · kind A · utility

3Cited by

24References

12Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Richard Allen Hayes · Brentwood, US
Leonard E. R. Kosinski · Washington, US
Mark E. Wagman · Wilmington, US

Key dates

Filing date	Jun 15, 1989
Grant date	Nov 20, 1990
Priority date	—
Expiry date	Jun 15, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L83/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Incorporation into polyacetal molding compositions stabilized with a non-meltable polymer stabilizer of 0.02-1.0 weight percent of at least one amide-containing phenolic antioxidant results in significantly improved long term stability, as evidenced by greater retention of physical properties over time, of such compositions.

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