C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
23/267
C09C 1/24 (2006.01) C01G 49/02 (2006.01) C01G 49/06 (2006.01) C09C 1/00 (2006.01)
Patent
CA 1231517
TRANSPARENT IRON OXIDE PIGMENTS Abstract of the Disclosure The present invention relates to a process for preparing transparent iron oxide pigments comprising reacting an iron compound, an ammonia releasing compound and water in a non-aqueous solvent in which both the iron compound and the ammonia releasing compound have appreciable solubility. The reaction is performed by refluxing this composition. Where a red pigment is desired, a high boiling alcohol may be employed whereby the refluxing is carried out above 200°C which thus converts the pigment to a red iron oxide pigment during the reflex step. In order to get a metallic finish, aluminum flake pigment may be added to a mixture of the iron compound and solvent prior to addition of the ammonia-releasing salt.
491603
Patil Arvind S.
Pepoy Louis J.
Basf Corporation
Robic Robic & Associes/associates
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