Blue phthalocyanine pigment composition and its preparation

Details Blue phthalocyanine pigment composition and its preparation Blue phthalocyanine pigment composition and its preparation

2011-03-15

2011-03-15

Green, Anthony J (Department: 1731)

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

C106S410000, C106S412000, C106S413000, C313S112000, C428S001100, C428S001600, C540S140000, C540S141000

Reexamination Certificate

active

07905952

ABSTRACT:
The invention pertains to pigment compositions comprising from 70 to 93%, preferably from 81 to 93%, of e copper phthalocyanine, from to 18% of an aminomethyl-substituted phthalocyanine, from 2 to 15% of an ammonium sulfonato phthalocyanine and less than 2% of other phthalocyanine compounds, preferably 5 made by wet-milling a mixture of a copper phthalocyanine and e copper phthalocyanine together with the aminomethyl-substituted phthalocyanine and a milling aid in an organic liquid and adding the ammonium sulfonato phthalocyanine before the milling aid and the organic liquid are separated from the wet-milled mixture.

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