Pigmented microporous silica microspheres

Details Pigmented microporous silica microspheres Pigmented microporous silica microspheres

1978-01-09

1979-01-02

Peters, G. O.

Compositions: coating or plastic

Materials or ingredients

106293, 106296, 106297, 106300, 106308B, C04B 3100

Patent

active

041325605

ABSTRACT:
Pigmented silica microsphere having an average diameter from 2 .mu.m to 100 .mu.m and consisting essentially of from 10% to 70% by weight of particulate pigment, dispersed throughout a microporous silica matrix and, optionally, containing a coating of dense amorphous silica. The microspheres are produced by acidifying a water-in-oil emulsion. The pigmented silica microspheres are particularly useful as opacifying agents for coating compositions and as fillers for paper.

REFERENCES:
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patent: 2528767 (1950-11-01), Marisic
patent: 2782869 (1957-02-01), Gray
patent: 3301635 (1967-01-01), Bergna et al.
patent: 3321276 (1967-05-01), Burzynski et al.
patent: 3848059 (1974-11-01), Ernita
patent: 3855172 (1974-12-01), Iler et al.
patent: 4011096 (1977-03-01), Sandell

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