Coated spherical SiO.sub.2 particles

Details Coated spherical SiO.sub.2 particles Coated spherical SiO.sub.2 particles

1997-04-21

1998-12-08

Marcheschi, Michael

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106446, 106457, 106445, 106490, 428403, 428404, 428405, 424724, C09C 128

Patent

active

058463100

ABSTRACT:
Spherical SiO.sub.2 particles with a size of from 5 to 500 nm coated at individual points with TiO.sub.2, Fe.sub.2 O.sub.3 or ZrO.sub.2 particles with a size of less than 60 nm. The coated SiO.sub.2 particles can be aftercoated with silanes or further metal oxides. The products obtained are used for pigmenting paints, printing inks, plastics and coatings or as sunscreen agents.

REFERENCES:
patent: 4600646 (1986-07-01), Stout
patent: 4775520 (1988-10-01), Unger et al.
patent: 4911903 (1990-03-01), Unger et al.
patent: 5139980 (1992-08-01), Nakahara et al.
patent: 5512094 (1996-04-01), Linton

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