Method for surface treating metal carbonate

Details Method for surface treating metal carbonate Method for surface treating metal carbonate

1988-03-31

1989-08-22

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523205, 427221, 427213, 428407, C08K 904, C08K 326

Patent

active

048597180

ABSTRACT:
A method of producing a calcium carbonate, magnesium carbonate or calcium-magnesium carbonate which is surface modified with an organic material wherein the carbonate in substantially dry, particulate form is contacted with an organic monomer, copolymers or a prepolymer, and surface polymerization or reaction in situ on the carbonate in the presence of a gaseous hydrogen atmosphere is effected. In the case where the carbonate has been wet processed and residues of a dispersing agent employed remain as a coating on the carbonate particles after drying, a minor amount of a calcined kaolin or TiO.sub.2 is used as a polymerization catalyst. When the carbonate has been dry ground so that the particles are free from processing chemicals, no catalyst is needed to initiate the polymerization.

REFERENCES:
patent: 3471439 (1969-10-01), Bixler et al.
patent: 3763084 (1973-10-01), Grudus et al.
patent: 3773708 (1973-11-01), Takahashi et al.
patent: 4196012 (1980-04-01), Windle
patent: 4248765 (1981-02-01), Patil et al.

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