Ultrafine iron-containing rutile titanium oxide and process for

Details Ultrafine iron-containing rutile titanium oxide and process for Ultrafine iron-containing rutile titanium oxide and process for

1997-08-22

1998-11-17

Marcheschi, Michael

Compositions: coating or plastic

Materials or ingredients

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

106436, 424600, 424646, 424 59, 428402, C09C 136, C09D 533, C09D 100, C01G 4900

Patent

active

058370501

ABSTRACT:
Ultrafine iron-containing rutile type titanium dioxide particles useful for UV shielding cosmetics, pharmaceutical compositions and UV shielding paints are disclosed. They are rutile type crystalline titanium dioxide particles having an average single particle size of 0.01 to 0.1 .mu.m and containing an iron component at a concentration of 1 to 15% by weight as expressed as Fe based on the titanium dioxide in the crystalline structure. They can be produced by using a fine titania sol comprising rutile crystallites as basic particles, precipitating iron oxide or hydrated iron oxide onto the surfaces of the titania particles to effect coating, then firing and grinding.

REFERENCES:
patent: 5165995 (1992-11-01), Losoi
patent: 5468289 (1995-11-01), Herget et al.

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