Precipitated silica

Details Precipitated silica Precipitated silica

1998-10-19

2000-06-20

Copenheaver, Blaine

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

2642106, 26421123, 264464, 521 64, B29C 4700, C08J 928

Patent

active

060774665

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.

REFERENCES:
patent: 3351495 (1967-11-01), Larsen et al.
patent: 3445189 (1969-05-01), Maat et al.
patent: 4024323 (1977-05-01), Versteegh et al.
patent: 4237083 (1980-12-01), Young et al.
patent: 4874594 (1989-10-01), Chevallier
patent: 5034207 (1991-07-01), Kerner et al.
patent: 5110574 (1992-05-01), Reinhardt et al.
patent: 5342598 (1994-08-01), Perselb
patent: 5605569 (1997-02-01), Boyer et al.
patent: 5851502 (1998-12-01), Turk et al.
Chemical Abstracts, vol. 89, No. 26; Dec. 25, 1978; p. 36.

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