Heat stable yellow iron oxides containing antimony

Details Heat stable yellow iron oxides containing antimony Heat stable yellow iron oxides containing antimony

1981-12-07

1983-02-22

Bell, Mark

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106304, 106308B, 106309, 423617, 423633, 427218, 428403, C01G 4902, C09C 124

Patent

active

043746764

ABSTRACT:
Yellow iron oxide pigments having improved heat stability are prepared by mixing a conventional yellow iron oxide pigment with an aqueous alkaline solution of a soluble antimony compound. This yields a yellow pigment whose particle surface is coated with "antimony-bloom", and this product has a higher heat stability temperature than does the starting yellow iron oxide. When the product coated with "antimony-bloom" is subjected to hydrothermal treatment (autoclaving), the resultant material has a yet-higher heat stability temperature. Other, related treatments furnish products with improved heat stability temperatures.

REFERENCES:
patent: 3946103 (1976-03-01), Hund
patent: 3969494 (1976-07-01), Nobuoka et al.

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