Microporous material exhibiting low alkali metal content

Details Microporous material exhibiting low alkali metal content Microporous material exhibiting low alkali metal content

1994-03-31

1996-12-10

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524264, 524266, 524280, 4283155, 4283179, 4283184, 4283197, 428331, 156409, 156400, 156401, C08J 307

Patent

active

055831710

ABSTRACT:
Microporous material comprising water insoluble thermoplastic organic polymer and particulate amorphous precipitated silica not only exhibits low particulate emissions during handling and use, but also has a low extactable alkali metal content. Microporous material having these characteristics is especially useful in clean rooms where electronic devices such as integrated circuits are manufactured. Such microporous material may be produced by employing amorphous precipitated silica particles having low alkali metal content as all or a substantial proportion of the amorphous precipitated silica particles constituting the microporous material.

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patent: 5047283 (1991-09-01), Leatherman
patent: 5196202 (1993-03-01), Schwarz
patent: 5256386 (1993-10-01), Nystrom et al.
patent: 5326391 (1994-07-01), Anderson et al.

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