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Finely divided epsilon-copper phthalocyanine composition (pigment blue 15:6) for use as pigment

A technology of pigment composition and copper phthalocyanine, applied in the direction of pigment slurry, azo dyes, organic dyes, etc., can solve the problem of hue shift

Inactive Publication Date: 2009-10-21
CLARIANT FIANCE (BVI) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they usually have the disadvantage of shifting the hue towards green

Method used

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  • Finely divided epsilon-copper phthalocyanine composition (pigment blue 15:6) for use as pigment
  • Finely divided epsilon-copper phthalocyanine composition (pigment blue 15:6) for use as pigment
  • Finely divided epsilon-copper phthalocyanine composition (pigment blue 15:6) for use as pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1: Solvent treatment in the presence of an additive of formula (3)

[0065] In a 2L flask, 50g of a 7 / 3 mixture of powdery α / ε-copper phthalocyanine (dried and pre-ground in a vibrating mill, unfinished), 2g of an additive of formula (3), 420ml of tetrahydrofuran and 630ml of water were mixed under stirring. Mix well. Then, the mixture was boiled at reflux for 8h. After this solvent treatment, the suspension was filtered off, the filter cake was washed with water at 50° C., dried in a convection oven at 80° C. for 16 h and pulverized with an IKA mill. 51.3 g of Pigment Blue 15:6 composition were obtained.

Embodiment 2

[0066] Example 2: Solvent treatment in the presence of an additive of formula (3)

[0067] In a 1 L flask, 24 g of a 9 / 1 mixture of powdered α / ε-copper phthalocyanine (dried and pre-ground in a vibrating mill, unfinished), 1 g of an additive of formula (3), 217 g of tetrahydrofuran and 256 g of dilute Sulfuric acid (5% by weight) was uniformly mixed. Then, the mixture was boiled under reflux for 6h. After this solvent treatment, the suspension was filtered off, the filter cake was washed with water at 50° C., dried in a convection oven at 60° C. for 18 h and pulverized with an IKA mill. 22.4 g of Pigment Blue 15:6 composition were obtained.

Embodiment 3

[0068] Example 3: Solvent treatment in the presence of 1 g of an additive of formula (2), wherein R 7 =R 8 =(CH 2 ) 2 (CH(CH 3 )) 2 (CH 2 CH(CH 3 )) 2 CH 3 )

[0069] Operation is carried out similarly to Example 2. 23.1 g of the corresponding Pigment Blue 15:6 composition are obtained.

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Abstract

The invention relates to a pigment composition of C.I. Pigment Blue 15:6, containing 0.5% to 15% by weight of an additive of the formula (1), based on the weight of the pigment, in which R, R, R, R, R and R independently of one another are hydrogen; C1-C22 alkyl or C2-C22 alkenyl, whose carbon chain in each case may be interrupted by one or more moieties -O-, -S-, -NR-, -CO- or -SO2- and / or may be substituted one or more times by hydroxyl, halogen, aryl, heteroaryl, C1-C4 alkoxy and / or acetyl; C3-C8 cycloalkyl, whose carbon framework may be interrupted by one or more moieties -O-, -S-, -NR-, -CO- or -SO2- and / or may be substituted one or more times by hydroxyl, halogen, aryl, heteroaryl, C1-C4 alkoxy and / or acetyl; dehydroabietyl or aryl or heteroaryl, with R and R independently of one another being hydrogen or C1-C22 alkyl. The pigment composition of the invention is produced with application of a wet grinding process, more particularly a salt kneading operation.

Description

technical field [0001] The invention relates to a pigment composition consisting of finely divided copper phthalocyanine in the ε-modification (Pigment Blue 15:6, CI 74160) and a process for the phase transformation from the α-phase or the γ-phase to the ε-phase. Background technique [0002] Three crystal modifications of commercially important copper phthalocyanines, the α-phase (Pigment Blue 15:1 and 15:2), the β-phase (Pigment Blue 15:3 and 15:4) and the ε-modification (Pigment Blue Blue 15:6), the ε-modification is the crystalline phase with the most reddish blue color. It additionally has a high tinting strength and exhibits particularly pure shades. These properties make C.I. Pigment Blue 15:6 of interest especially for special applications such as in the field of color filters used in varnishes, prints or plastics and in optical displays or as pigmented photoresists. [0003] Thermodynamically, the stability of the ε-phase is between that of the α- and β-phases. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/50C09B67/20C09B67/08C09D5/00C09D7/41
CPCC09B67/0026C08K5/0091C09D7/1233C09B67/0065C09D17/003C09B67/0008C09D7/41C09B47/04C09B67/0002C09B67/0016
Inventor T·梅茨G·梅尔特瑞特尔K·布里赫奇C·普拉格W·恰弗尔
Owner CLARIANT FIANCE (BVI) LTD