Process for the production of β type copper...

Details Process for the production of β type copper... Process for the production of β type copper...

2005-03-01

2005-03-01

Green, Anthony J. (Department: 1755)

Compositions: coating or plastic

Materials or ingredients

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

C106S410000, C106S411000, C106S413000, C106S031780, C540S122000, C540S140000, C540S141000

Reexamination Certificate

active

06860934

ABSTRACT:
A process for the production of a β type copper phthalocyanine pigment having an average primary crystal diameter of 80±40 nm and a primary crystal aspect ratio of 2.0±1.0 and having a crystallite diameter of 22±5 nm in the direction perpendicular to a monoclinic β (200) plane, a crystallite diameter of 27±5 nm in the direction perpendicular to a β (001) plane and a crystallite diameter of 15±5 nm in the direction perpendicular to a β (010) plane,which process comprises,dry-milling a crude copper phthalocyanine having a purity of 97 to 100% and a primary crystal diameter of 0.5 to 100 μm at 180 to 50° C., to prepare an α/β mixed crystal type copper phthalocyanine having an a ratio of 5 to 35%, andtreating the dry-milled product in a water-miscible organic solvent.

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