Surface modified calcium carbonate composition and uses therefor

Details Surface modified calcium carbonate composition and uses therefor Surface modified calcium carbonate composition and uses therefor

1995-08-24

1996-07-02

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

106401, 1621812, 1621813, 1621811, 423430, C09C 102

Patent

active

055318215

ABSTRACT:
An improved form of calcium carbonate which is acid resistant to enable its use as a filler material in the making of neutral to weakly acid paper, and a process for producing this acid-resistant calcium carbonate is provided. This acid-resistant calcium carbonate comprises calcium carbonate in admixture with at least about 0.5 to about 10 percent, based on the dry weight of the calcium carbonate, of a cationic salt, together with at least about 0.5 to about 10 percent, based on the dry weight of the calcium carbonate, of an anionic salt.

REFERENCES:
patent: 4242318 (1980-12-01), Brahm et al.
patent: 4610801 (1986-09-01), Matthews et al.
patent: 5007964 (1991-04-01), Tsukisaka et al.
patent: 5043017 (1991-08-01), Passaretti
patent: 5221435 (1993-06-01), Smith, Jr.

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