Solid state reactions with MgCO.sub.3 /MgOH

Details Solid state reactions with MgCO.sub.3 /MgOH Solid state reactions with MgCO.sub.3 /MgOH

1988-06-23

1990-03-06

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106467, 106468, C09C 102

Patent

active

049063006

ABSTRACT:
In the method for producing a low abrasion calcined kaolin clay pigment by providing a feed kaolin which is at least sufficiently fine that substantially 100% by weight of the particles are of less than 1 micrometer E.S.D., and heating said feed in a calciner to a temperature of at least 900.degree. C., and under conditions such that substantially none of said kaolin is heated to a temperature in excess of 1100.degree. C.; a reduction in the abrasivity of the calcined product is achieved by incorporating into the feed from 1 to 4% by weight of MgCO.sub.3 and/or Mg(OH).sub.2.

REFERENCES:
patent: 3014836 (1961-12-01), Proctor, Jr.
patent: 3586523 (1971-06-01), Fanselow et al.
patent: 3690907 (1972-09-01), Krsoning et al.
patent: 3753753 (1973-08-01), Kirby et al.
patent: 3784392 (1974-01-01), Bertorelli
patent: 3876443 (1975-04-01), Conley et al.
patent: 4098762 (1978-07-01), Miyata et al.
patent: 4381948 (1983-05-01), McConnell et al.

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