Patent · US Expired

Impact modified polyacetal compositions

US5919849A · kind A · utility

10Cited by

11References

4Claims

0Family size

Assignees

Rohm and Haas Company · US
Hoechst GmbH · DE

Inventors

Nazir A. Memon · Yardley, US
Richard H. Weese · Washington Crossing, US
Ursula Ziegler · Hochheim, DE

Key dates

Filing date	Sep 9, 1996
Grant date	Jul 6, 1999
Priority date	—
Expiry date	Sep 9, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L59/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to improved polyacetal compositions composed of polyoxymethylene (component A) and a stabilized MBS core shell graft copolymer (component B) formed from a rubber-elastic core based on polybutadiene, and a hard graft shell. The stabilized MBS core shell graft copolymer (component B) contains a special stabilization formulation of at least one hindered phenol, a phosphite, a sulfide, and a pH buffer system. The shaped articles produced from these mixtures are particularly distinguished by an excellent low-temperature impact strength and a good heat aging performance.

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