Thin silica flakes and method of making

Details Thin silica flakes and method of making Thin silica flakes and method of making

1989-02-23

1990-11-20

Cannon, James C.

Liquid purification or separation

Filter

Material

210635, 210657, 4283055, 4283115, 4283179, 435803, B01D 1508, B01D 3906, B01D 3916, B01D 3920

Patent

active

049716972

ABSTRACT:
Hydrated sodium silicate particles can be expanded by heat to form thin-walled bubbles that can be broken, neutralized, washed and dried to provide hydrated silica flakes. These flakes can be mixed with non-swelling sorptive particles such as TLC grade silica and used to make chromatographic articles. One such article is a composite of a poly(tetrafluoroethylene) fibril matrix in which those particles and hydrated or fired silica flakes are enmeshed. The hydrated silica flakes can be fired to a refractory state and then incorporated into protective coatings to enhance their resistance to abrasion while also better protecting the coated substrates from corrosion.

REFERENCES:
patent: 3794503 (1974-02-01), Netting
patent: 3795524 (1974-03-01), Sowman
patent: 3796777 (1974-03-01), Netting
patent: 3960583 (1976-06-01), Netting et al.
patent: 4153661 (1979-05-01), Ree et al.
patent: 4349456 (1982-09-01), Sowman
patent: 4373519 (1983-02-01), Errede et al.
patent: 4460642 (1984-07-01), Errede et al.
patent: 4565663 (1986-01-01), Errede et al.
patent: 4810381 (1989-03-01), Hagen et al.

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