Method of producing a greener shade Alkali Blue product and prod

Details Method of producing a greener shade Alkali Blue product and prod Method of producing a greener shade Alkali Blue product and prod

1978-09-05

1980-02-19

McCarthy, Helen M.

Compositions: coating or plastic

Materials or ingredients

260392, C09B 1110

Patent

active

041893280

ABSTRACT:
This invention is concerned with the modification of the hue of Alkali Blue pigments of known organic structures by intimate incorporation under aqueous alkaline conditions of a minor amount of a phenolic compound, illustratively beta naphthol. Upon recovery of the treated pigment under aqueous acid conditions, the hue of Alkali Blue is modified from a generally red shade blue to the greener end of the spectrum. The invention provides a novel means of color control and color modification with consequent correlative new compositions of matter.

REFERENCES:
patent: 2429081 (1947-10-01), Steuber
patent: 3057776 (1962-10-01), Short et al.
patent: 4032357 (1977-06-01), Rees et al.

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