Patent · US Active

Obtaining melt viscosity stability of polyoxymethylene compositions

US8741202B2 · kind B2 · utility

1Cited by

6References

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	Jun 3, 2014
Priority date	—
Expiry date	Jun 27, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2650/30
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Processes for improving melt flow properties of molten compositions with polyoxymethylene polymers and polymer/polyol additives having a certain core-link-arm structure, which include: obtaining melt viscosity stability while improving notched Izod, decreasing relative apparent capillary melt viscosity, and increasing elongation at break relative to molten compositions of polyoxymethylene polymers without the polymer/polyol additives.

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