Patent · US Active

Electret materials

US7947767B2 · kind B2 · utility

0Cited by

5References

10Claims

0Family size

Assignee

BASF SE

Inventors

Hui Chin · Katonah, US
Matthew E. Gande · New Fairfield, US
Andrew J. Leggio · Franklin Square, US

Key dates

Filing date	Jan 12, 2010
Grant date	May 24, 2011
Priority date	—
Expiry date	Jan 12, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/60
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Disclosed are electret materials with outstanding thermal and charge stability. The electret materials comprise a melt blend of a thermoplastic polymer and one or more hindered hydroxylamine ester compounds that comprise at least one moiety of the formula I

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