Patent · US Active

Polyoxymethylene compositions with branched polymers

US9109112B2 · kind B2 · utility

0Cited by

9References

20Claims

0Family size

Assignee

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

Inventors

Ramabhadra Ratnagiri · Wilmington, US
Henry Keith Chenault · Hockessin, US

Key dates

Filing date	Jun 27, 2011
Grant date	Aug 18, 2015
Priority date	—
Expiry date	Nov 14, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1397
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyoxymethylene compositions with polyoxymethylene polymers polymer/polyol additives having a core-link-arm structure. Upon molding, these compositions exhibit stable melt viscosity and simultaneous improvement in notched Izod impact strength and/or decreased relative apparent capillary melt viscosity, and/or increased elongation at break, relative to polyoxymethylene compositions lacking such core-link-arm structure additives.

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