Phthalocyanine pigment preparations

Details Phthalocyanine pigment preparations Phthalocyanine pigment preparations

2007-08-14

2007-08-14

Green, Anthony J. (Department: 1755)

Compositions: coating or plastic

Materials or ingredients

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

C106S031780, C106S410000, C106S412000, C430S105000, C430S108210, C524S088000

Reexamination Certificate

active

10539034

ABSTRACT:
A copper phthalocyanine pigment preparation contains a copper phthalocyanine pigment and at least one pigment dispersant from the group of copper phthalocyanine sulfonic acids and copper phthalocyanine sulfonic acid salts. The inventive pigment preparation is characterized by a) a maximum dynamic viscosity of 180 mPas and/or a maximum thixotropy of 800 Pa/s, the dynamic viscosity and the thixotropy being determined by a rotary viscometer at a temperature of 23° C. in a pigment dispersion comprising 28 percent by weight of dry copper phthalocyanine pigment preparation, 9 percent by weight of nitrocellulose, 62.3 percent by weight of ethanol, and 0.7 percent by weight of ethyl acetate; and b) a color intensity such that a printing ink consisting of an ethanol
itrocellulose gravure varnish, containing 75 to 65 percent by weight of ethanol and 9 to 11 percent by weight of nitrocellulose at a ratio of 2 to 7.5, and a maximum amount of dry copper phthalocyanine pigment preparation of 6.6 percent by weight relative to the total weight of the printing ink, reaches the ⅓ standard depth of shade of the corresponding tone.

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