Stabilized calcium carbonate composition using sodium carbonate

Details Stabilized calcium carbonate composition using sodium carbonate Stabilized calcium carbonate composition using sodium carbonate

1995-10-20

1997-07-15

Bonner, Melissa

Compositions: coating or plastic

Materials or ingredients

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

106465, 1621811, 162158, C09C 102, D21H 1769

Patent

active

056479026

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 sodium carbonate, together with at least about 0.1 percent, based on the dry weight of the calcium carbonate, of a mixture of weak acids in admixture with the calcium carbonate.

REFERENCES:
patent: 3989195 (1976-11-01), Falcon-Steward
patent: 4420341 (1983-12-01), Ferrigno
patent: 5043017 (1991-08-01), Passaretti
patent: 5156719 (1992-10-01), Passaretti

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