Silica powder and use thereof

Details Silica powder and use thereof Silica powder and use thereof

2007-03-19

2010-10-26

Cano, Milton I (Department: 1796)

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...

C423S335000, C523S220000, C524S492000

Reexamination Certificate

active

07820750

ABSTRACT:
The present invention herein provides silica powder which can be incorporated into a sealing material at a high content to thus give a sealing material having excellent moldability. The silica powder at least has, in the volume-based frequency distribution of particle size as determined by the laser diffraction-scattering technique, a maximum frequency value for a mode peak1present in a particle size range extending from 1 to 4 μm and a maximum frequency value for a mode peak2present in a particle size range extending from 15 to 55 μm, wherein the maximum frequency value for the mode peak2is greater than that for the mode peak1, the mode peak2has a shoulder, and the content of particles whose particle size ranges from 15 to 55 μm is larger than that of particles whose particle size ranges from 1 to 4 μm.

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Machine Translation of JP 2005-306923.
International Search Report for PCT/JP2007/055503, Mailed Jul. 3, 2007. (Present in file wrapper).
Translation of Harada et al. (JP 2005-306923).

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