Amorphous precipitated siliceous pigments and methods for their

Details Amorphous precipitated siliceous pigments and methods for their Amorphous precipitated siliceous pigments and methods for their

1976-03-24

1977-08-30

Garvin, Patrick P.

Compositions: coating or plastic

Materials or ingredients

423339, 423335, C01B 3318, C09C 128

Patent

active

040452409

ABSTRACT:
A method for producing precipitated silicic acid pigments and silicates having a unique combination of physical and chemical properties is disclosed. The pigments are produced by acidulating a solution of an alkali metal silicate with an acid until precipitation just begins. At this point the reaction mass is aged for a period of time and thereafter the acid addition is continued until the precipitated product is obtained. Pigments produced in accordance with the invention exhibit lower wet cake moisture (or higher percent solids).

REFERENCES:
patent: 3235331 (1966-02-01), Nauroth et al.
patent: 3503707 (1970-03-01), Burke, Jr.

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