Ink jet ink, ink cartridge, and ink jet recording method

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United States of America Patent

PATENT NO 8960879
APP PUB NO 20120127233A1
SERIAL NO

13291984

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Abstract

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An ink jet ink contains a resin A, a resin B, and a pigment, in which the pigment is a halogenated metal phthalocyanine pigment being dispersed by the resin B, the resin A is a random copolymer having a carboxy group, the resin B is a block copolymer having a carboxy group, the acid value of the resin A is less than the acid value of the resin B, and the ink further includes a polybasic acid having a functional group whose pKa is 4.3 or less and a functional group whose pKa is 5.0 or more and 6.6 or less.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furuse, Tsuyoshi Isehara, JP 24 216
Matsumoto, Nobuyuki Tokyo, JP 126 1177
Saito, Takashi Yokohama, JP 527 6556
Yamashita, Yoshihisa Kawasaki, JP 97 1210

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