Vesiculated silica microspheres

Details Vesiculated silica microspheres Vesiculated silica microspheres

1975-06-10

1977-03-08

Garvin, Patrick P.

Compositions: coating or plastic

Materials or ingredients

423335, 423338, 106293, 106296, 106297, 106299, 106300, 106307, 252448, 252449, C04B 3100

Patent

active

040110966

ABSTRACT:
Vesiculated silica microspheres having an average diameter from 0.5.mu. to 50.mu., a maximum vesicle diameter less than 50.mu. and a volume of vesicles from 5 to 95% of the total volume of the microspheres, produced by acidifying an oil-in-water-in-oil emulsion prepared by a double emulsion technique. The vesiculated silica microspheres are particularly useful as opacifying agents for coating compositions and as fillers for paper.

REFERENCES:
patent: 2384946 (1945-09-01), Marisic
patent: 2528767 (1950-11-01), Marisic
patent: 2697066 (1954-12-01), Sieg
patent: 2757073 (1956-07-01), Drexel
patent: 3301635 (1967-01-01), Bergn et al.
patent: 3848059 (1974-11-01), Erneta
patent: 3855172 (1974-12-01), Iler et al.
patent: 3857924 (1974-12-01), Halasz et al.

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