Acid resistant carbonate composition containing an aluminum or m

Details Acid resistant carbonate composition containing an aluminum or m Acid resistant carbonate composition containing an aluminum or m

1995-10-20

1997-01-14

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

106465, 106471, 1621811, 1621814, 1621815, 162183, C09C 102

Patent

active

055934897

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 are provided. This acid resistant calcium carbonate comprises a mixture of at least about 0.1 percent, based on the dry weight of the calcium carbonate, of an aluminum or magnesium hydroxide, together with at least about 0.1 percent, based on the dry weight of the calcium carbonate, of a mixture of weak acids.

REFERENCES:
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patent: 3639158 (1972-02-01), Maskel et al.
patent: 3869299 (1975-03-01), Periard
patent: 3941610 (1976-03-01), Maskel et al.
patent: 4242318 (1980-12-01), Brahm et al.
patent: 5043017 (1991-08-01), Passaretti
patent: 5075093 (1991-12-01), Tanaka et al.
patent: 5156719 (1992-10-01), Passaretti
patent: 5230734 (1993-07-01), Kumasaka et al.

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