Organic pigment composition for color filters, method for producing same, and color filter
AssigneeDIC Corporation
InventorsShogo Yamada, Ikuro Kiyoto
Life of this patent
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Abstract
Provided is an organic pigment composition for color filters, which can be used preferably for a color filter that allows to produce a liquid crystal display device which has excellent heat resistance, a brighter display screen, and accordingly higher brightness; a method for producing the same; and a color filter which includes the organic pigment composition for color filters. The color filter has higher heat resistance by using the organic pigment composition for color filters which includes a phthalocyanine pigment and a pigment derivative in which the ratio of a multi-substituted phthalimide alkyl group to the whole amount of the pigment derivative is limited.
Claims20
An organic pigment composition for color filters, comprising:
- a phthalocyanine pigment (A);
- and
- a pigment derivative (B) represented by General Formula (1):
- wherein in General Formula (1), M represents a metal which may have a substituent or 2H, Z represents a phthalimide alkyl group which may have a substituent, n1, n2, n3, and n4 represent the number of the substituent Z and each independently is an integer of 0 to 4, provided that when N=n1+n2+n3+n4, a relation of 1≤N≤8 is satisfied, a sum of the strength ratio of pigment derivatives having an N of 3 to 8 in field desorption ionization mass spectrometry is 30% or less of a sum of the strength ratio of pigment derivatives having an N of 1 to 8, a strength ratio of pigment derivative of N=2 in field desorption ionization mass spectrometry is 20% or more of a sum of the strength ratio of pigment derivatives having an N of 1 to 8, and a strength ratio of pigment derivative of N=5 is 0.7% or more and less than 5.1% of a sum of the strength ratio of pigment derivatives having an N of 1 to 8.
Dependencies are inferred from the claim text.