Compositions: coating or plastic – Materials or ingredients
Patent
1977-03-02
1978-02-07
Douglas, Winston A.
Compositions: coating or plastic
Materials or ingredients
106306, 106308B, 106 72, 106 73, 428404, C09C 128
Patent
active
040725375
ABSTRACT:
A composite silicate pigment is prepared according to a precipitation reaction when spherical, hydrous metal silicate particles are precipitated on the planar surfaces of clay particles having a platelet-type structure. The result of the precipitation reaction is to produce a product having an unexpected improvement in optical efficiency as compared with the optical efficiency of the clay component alone. When incorporated in a sheet of paper or the like, the spherical metal silicate particles act as spacers between individual clay particles to produce void volume or light scattering sites which in turn provide improved optical properties to the paper.
REFERENCES:
patent: 2296637 (1942-09-01), Hanahan
patent: 3433704 (1969-03-01), Hecklan et al.
Douglas Winston A.
Howard J. V.
Westvaco Corporation
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