Amorphous silica particles having a double structure, process fo

Details Amorphous silica particles having a double structure, process fo Amorphous silica particles having a double structure, process fo

1998-06-12

2000-12-12

Griffin, Steven P.

Compositions: coating or plastic

Coating or plastic compositions

Wax containing

423335, 524493, 428404, C01B 3312

Patent

active

061592773

ABSTRACT:
The present invention provides the amorphous silica particles having a double structure of a core of the dense amorphous silica and a shell of the bulky amorphous silica, having a volume-based median diameter of from 1 to 5 .mu.m and containing not more than 10% by volume of fine particles having a particle diameter of not larger than 0.5 .mu.m. The amorphous silica particles of the double structure have constant particle diameters not only in the powdery state but also in a state where they are blended in a coating material or in a resin, without developing fine particles, exhibit excellent delustering action and antiblocking action, exhibit decreased abrading property, and exhibit excellent resistance against scars or abrasion.

REFERENCES:
patent: 2885366 (1959-05-01), Iler
patent: 3591518 (1971-07-01), McMillan
XP 002078481 Derwent Publications Ltd., Section CH, Week 9130, Class A60 AN 91-218507 Jun. 13, 1991.

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