Amorphous silica filler
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United States of America Patent
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Jan 24, 1995
Issued Date -
N/A
app pub date -
Jul 22, 1993
filing date -
Mar 15, 1991
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The amorphous silica has a large apparent specific gravity despite of its BET specific surface area of 200 to 500 m.sup.2 /g, has an oil-absorption amount of as small as 50 to 120 ml/100 g, has an agglomeration degree (D1/D0=DA) defined by the ratio of silica elementary particle diameter D0 to primary particle diameter D1 of from 10 to 50, and has nearly a spherical particulate structure which is quite different from that of the conventional gelation method silica (DA=.infin.). The amorphous silica-type filler exhibits excellent properties in regard to handling, processability, dispersion property and abrasion-resistant property and, when added as, for example, an anti-blocking agent, makes it possible to obtain resin films having transparency and scratch-resistant property without fisheyes or voids. Owing to the above properties, the amorphous silica that is used as a filler for the heat-sensitive recording papers suppresses ground fogging, improves the image concentration, makes it possible to apply a highly viscous coating solution since the filler dispersed in an aqueous solution creates very small viscosity, and imparts excellent abrasion resistance to the apparatus during the step of coating.

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Patent Owner(s)
Patent Owner | Address | |
---|---|---|
MIZUSAWA INDUSTRIAL CHEMICALS LTD | 5-9 NIHONBASHI-HONCHO 1-CHOME CHUO-KU TOKYO 1030023 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Abe, Kiyoshi | Shibata, JP | 41 | 693 |
Enomoto, Kazumitsu | Kita-kanbara, JP | 4 | 43 |
Kitsu, Toshio | Shibata, JP | 5 | 79 |
Ogawa, Masahide | Shibata, JP | 41 | 471 |
Takahashi, Masao | Kita-kanbara, JP | 109 | 1664 |
Washio, Yuuzi | Kita-kanbara, JP | 3 | 30 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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