Method for producing pigment for use in sizing compositions

Details Method for producing pigment for use in sizing compositions Method for producing pigment for use in sizing compositions

1979-10-24

1982-01-12

McCarthy, Helen M.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308C, 106288B, 162177, 162181A, 241 16, 241 22, 423555, C04B 3140

Patent

active

043103600

ABSTRACT:
Methods for producing pigment for use in sizing agents and filler agents for coating paper, cardboard and the like are disclosed. The method includes providing calcium sulphate dihydrate as the pigment and beating the calcium sulphate dihydrate in the presence of a dispersing agent comprising a polysaccharide substituted with carboxyl groups, preferably carboxymethyl cellulose.

REFERENCES:
patent: Re29295 (1977-07-01), Steel et al.
patent: 2177269 (1939-10-01), Sullivan
patent: 2197003 (1940-04-01), Mowlds
patent: 2572932 (1951-10-01), Horsey et al.
patent: 2810644 (1957-10-01), Shearer
patent: 3140915 (1964-07-01), Axelrad et al.
patent: 3262799 (1966-07-01), McCleary et al.
patent: 3951675 (1976-04-01), Krempff
patent: 4174998 (1979-11-01), Shiel
patent: 4196008 (1980-04-01), Kennedy-Skipton

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