High bulking pigment and method of making same

Details High bulking pigment and method of making same High bulking pigment and method of making same

1985-06-26

1987-02-03

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

106137, 106148, 106214, 106288R, 106299, 4285375, 428511, 524447, C08L 8900, C08J 300, C04B 1400

Patent

active

046407162

ABSTRACT:
A pigment comprising particles of uncalcined kaolin clay combined in the absence of a binder with an amount of an added source of zirconium ion, such as ammonium zirconium carbonate, at least sufficient to enhance optical character of a dried composition containing the pigment. In application, the pigment may be utilized in a coating for paper or other fibrous web substrate to produce sheet materials of enhanced opacity. Alternatively, the pigment may be employed as a filler in a fibrous web substrate to provide improved optical character of the material. Also disclosed is a method preparing a pigment, including preparing a dispersed slurry of clay particles in an aqueous medium, wherein the improvement comprises utilizing an uncalcined kaolin clay and introducing into the slurry in the absence of a binder the source of zirconium ion in an amount at least sufficient to enhance the optical character afforded by the pigment.

REFERENCES:
patent: 2964403 (1960-12-01), Beekman et al.
patent: 4075030 (1978-02-01), Bundy et al.
patent: 4076548 (1978-02-01), Bundy et al.
patent: 4078941 (1978-03-01), Bundy
patent: 4375989 (1983-03-01), Makinen
patent: 4447270 (1984-05-01), Howard et al.
patent: 4447271 (1984-05-01), Howard et al.
"Ammonium Zirconium Carbonate, An Alternative Insolubilizer For Coating Binders", pp. 165-179.
TAPPI Proceedings of the 1982 Coating Conference.
W. M. Bundy et al, Chemically Induced Kaolin Floc Structures For Improved Paper Coating, TAPPI 1983 Coating Conference, pp. 175-187.
I. McAlpine, Zirconium Carbonate, An Alternative Insolubilizer For Coating Binders, TAPPI 1982 Coating Conference, pp. 165-179.

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