Preparation of aqueous suspensions of talc

Details Preparation of aqueous suspensions of talc Preparation of aqueous suspensions of talc

1981-10-22

1984-02-07

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

106291, 106308Q, 1621816, 252314, B01J 1300, C04B 3140, C08K 700, C09C 306

Patent

active

044302495

ABSTRACT:
In order to make talc more readily dispersible in an aqueous medium, it is contacted, in a finely divided form, with an aqueous solution of an alkali metal hydroxide or ammonium hydroxide, it is then washed with clean water, whereafter it is thermally dried to remove at least a substantial proportion of the water associated therewith. The talc thus treated can be suspended in water containing a dispersing agent.

REFERENCES:
patent: 2259457 (1941-10-01), Croll
patent: 2844486 (1958-07-01), Lamar
patent: 3227607 (1966-01-01), Mays et al.
patent: 3798174 (1974-03-01), Acker et al.
patent: 4187192 (1980-02-01), Sheridan
Tappi Monograph No. 38 on "Paper Coating Pigments" (Tappi, 1976), Chap. 9, Talcs, pp. 178-190.

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