Patent · US Expired

Precipitated silica

US6077466A · kind A · utility

10Cited by

10References

4Claims

0Family size

Assignee

Degussa-Huels AG · DE

Inventors

Gunter Turk · Hanau, DE
Gerold Schmidt · Hamburg, DE
Mustafa Siray · Hanau, DE
Karl Meier · Bornheim, DE

Key dates

Filing date	Oct 19, 1998
Grant date	Jun 20, 2000
Priority date	—
Expiry date	Oct 19, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A process for preparing microporous separating elements for batteries by intensive mixing of a high molecular weight polyethylene with a precipitated silica having specific chemical and physical characteristics, a process liquid and a stabilizer to form a powder mixture, which is extruded to form a film, from which the process liquid is removed, thereby leaving the desired microporous separating elements which are recovered.

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