D - Textiles – Paper – 06 – P
Patent
D - Textiles, Paper
06
P
6/197
D06P 1/06 (2006.01) C08K 5/23 (2006.01) C09B 63/00 (2006.01) C09B 67/22 (2006.01) C09D 11/00 (2006.01)
Patent
CA 1202151
ABSTRACT OF THE DISCLOSURE There are described organic-inorganic ternary com- posite pigments consisting of 70% - 90% by weight of an inorganic binary titanium dioxide/aluminum hydrate component and, from 10% to 30% by weight, of a co-precipitated organic component consisting of an organic dye, containing in its structure at least one carboxylic and/or sulphonic acid function, having the formula: Image (I) wherein R1 is selected from the group consisting of: NO2 -SO3H and -COOH; R2 is selected from the group consisting of NO2, -SO3H, alkyl (having 1 to 4 car- bon atoms) and alkoxyl (having 1 to 4 carbon atoms); R3 is selected from the group consisting of H, hal- ogen and alkyl (having 1 to 4 carbon atoms); R4 and R5 are each selected from the group consisting of H, halogen, alkyl (having 1 to 4 carbon atoms) and alkoxyl (having 1 to 4 carbon atoms); R6 is selected from the group consisting of H, halogen and alkoxyl (having 1 to 4 carbon atoms); and wherein the -COOH and/or -SO3H group of dye (I) is salified with metal cations. The pigments are obtained by co-precipitation, acidifying an aqueous solution and/or dispersion of acid dye (I) in sodium aluminate, in the presence of Tio2, maintain- ed at 40-80°C and at pH = 9.5 - 10.5, by then treating it with any aqueous solution of an alkaline-earth (Ca, Ma, Al, Ba, Sr) salt or of Mn or Zn.
442505
Bottaccio Giorgio
Carlini Filippo M.
Osti Alberto
Paffoni Camillo
Marks & Clerk
Montedison S.p.a.
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