Transparent cobalt blue pigment prodn. - from cobalt and aluminium salt solns. by two=stage pptn. at controlled pH, for use in lacquers and plastics

In the prodn. of transparent cobalt blue (I) from a Co and an Al salt soln. by pptn. of Co hydroxide (IIA) or Co carbonate (IIB) with alkali or soda, a ppte. of Al hydroxide (IIIA) or Al carbonate (IIIB) is formed on the (II) suspension with pH is approx. 8 by simultaneous addn. of an Al salt soln....

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Bibliographische Detailangaben
1. Verfasser:	SEITZ,AUGUST,.DR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ADHESIVES CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DYES INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES PREPARATION OF CARBON BLACK TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	In the prodn. of transparent cobalt blue (I) from a Co and an Al salt soln. by pptn. of Co hydroxide (IIA) or Co carbonate (IIB) with alkali or soda, a ppte. of Al hydroxide (IIIA) or Al carbonate (IIIB) is formed on the (II) suspension with pH is approx. 8 by simultaneous addn. of an Al salt soln. and an alkali or soda soln. (I) is used as pigment for transparent lacquers and plastics. These pigments extend the range of applications of (I) and also broaden the palette of transparent blue colours. They have better lightfastness, esp. in pale tones, then familiar transparent blue colours.