CS259938B1 - A phthalocyanine-based pigment formulation - Google Patents

Abstract

A preparation based on beta-modified copper phthalocyanine for the pigmentation of gravure inks consisting by weight of 74.0 to 95.5% copper phthalocyanine (mean primary particle size 0.01 to 0.1 µm), 4.0 to 20.0 » compound I, where Ry is alkyl or alkenyl with 10 to 20 carbon atoms, R2 is hydrogen or (CH2>n OH, n is 2 to 4 and 0.5 to 6.0 « compound II, where FCM is a copper phthalocyanine residue and m is 2 to 6.

Description

The invention relates to a preparation based on copper phthalocyanine beta modification for pigmentation of intaglio inks.

The blue pigment used in gravure printing is the phthalocyanine blue beta modification, i.e. C.I. Pigment Blue 15: 3. Phthalocianin blue with an average primary particle size of about 9.05 µm can be advantageously applied for pigmenting an intaglio ink, since the pigment then has a high spreading capacity, i.e. its dyeing power is utilized to the maximum extent. Such fine phthalocianin pigment particles both tend to form secondary particles, i.e., react, and cause poor flow properties of the intaglio ink. The formation of aggregates can be partially prevented by treating the surface of the particles with various excipients (U.S. Pat. Nos. 2,305,379, 3,775,149,

Briton. U.S. Pat. 900 757, 987 242, 1 100 103, MS. AO 234 629, etc.), however, the high apparent ink viscosity is a significant drawback that negatively affects the gravure printing technique.

Said drawback can be remedied according to the invention using a pigment preparation containing 74.0 to 95.5% by weight of copper phthalocyanine beta modification with a mean primary particle size of 0.01 to 0.1 µm, 4.0 to 20.0% by weight of the compound of formula I

X 2

R ₁ CON (CH ₂ ) _n OH where R 1 is alkyl or alkenyl having a carbon number of 10 to 20 R ₂ is hydrogen or (CH ₂ , _n OH n is 2 to 4, and 0.5 to 6.0 wt% compounds of formula II (I)

FCM CH, NH (CH.)

Z Z m Z wherein FCM is a copper phthalocyanine residue and m is 2 to 6

The pigment preparation of the invention contains 74.0 wt% copper phthalocyanine beta modification with a mean priming particle size of 0.001 to 0.1 µm. Copper phthalocyanine produced by known processes can be used, for example from phthalic anhydride, urea and cuprous chloride by reaction at elevated temperature and in the presence of ammonium molybdenum in an organic solvent such as trichlorobenzene or by a dry continuous process. The desired particle size can be achieved by microfining copper phthalocyanine in, for example, bead mills or malaxers. Preferably, the copper phthalocyanine meta modification can be micronized in the presence of a compound of formula (II) and the product is then treated with a mono- or dialkanolamide of formula (I), such as palmitic, stearic, oleic and other carboxylic acid mono- or diethanolamide. acids having a carbon number of 11 to 21.

The composition according to the invention contains 0.5 to 6.0% by weight of the compound of formula II, which is a substituted phthalocyanine, which anchors to the surface of the base pigment during micronization. The presence of substituted phthalocyanine II and the compound of formula I results in a markedly increased affinity of the copper phthacyanine beta modification particles for the aromatic solvent molecules and hence the advantageous flow properties of the intaglio ink.

The examples show the production possibilities of the compositions according to the invention as well as the properties of the products obtained.

He did

120 ml of water, 12.0 g of sodium di- (2-ethylhexyl) -sulfosuccinate, 100 g of copper phthalocyanine beta modification (96.4 S) were charged to a laboratory vertical bead mill.

2.0 g of FCMCH (CH3) 2NHCH2FCM and 520 ml of 0.7 mm diameter glass beads. The suspension was milled for 4 hours at 36 ° C, then glass beads were separated in a brass sieve funnel and washed with 1100 ml of water. An emulsion containing 320 ml of water, 1.2 g of sodium di- (2-ethylhexyl) sulfosuccinate and 12.0 g of oleic acid monoethanolamide was added to the diluted dispersion over 15 minutes with stirring. The mixture was heated to 80 ° C, acidified to 20 ml of hydrochloric acid and stirred for 30 min. The dispersion was then filtered, washed with water and the product dried at 90 ° C.

An intaglio ink was produced using the preparation, with which a test printing was performed. The flow properties were evaluated by measuring the apparent viscosity of the dispersion of the preparation in xylene (concentration 30% wt, shear rate 10 s \ temperature 25 ° C). The table shows the results compared to the properties of the product produced by the prior art.

Table I

Standard

55 practically the same

1,07 6,00 proof - dispersing hardness proof - shade% io ^(Pa - ^s)

It can be seen from Table I that the preparation according to the invention disperses very well in the gravure system and the dispersion in the aromatic solvent has a considerably lower apparent viscosity.

Example 2

A mixture of 35 g of copper phthalocyanine beta modification was malaxized in a two-blade kneader,

1.0 g of FCMCI-NH (CH ₂ ) 4 NHCH 3 -FCM, 120 g of sodium chloride and 45 g of 600 MW average polyethylene glycol. . The aqueous dispersion was heated to 80 ° C, filtered and the filter cake was washed. This cake was slurried in 300 ml of water and a solution of 4.0 g of stearic monoethanolamide in 30 ml of glacial acetic acid was added to the dispersion with stirring. The mixture was heated to 85 ° C, stirred for 30 minutes, filtered on a Bflchner filter and washed with hot water. The product was dried at 80 ° C and milled. The prepared product dispersed well in the production of intaglio ink, the ink had a low apparent viscosity, and the proof prints were of high quality in both density and shade.

Claims (1)

Pigment preparation based on copper phthalocyanine beta modification having a composition of 74.0 to 95.5% by weight of copper phthalocyanine beta modification with a mean primary particle size of 0.01 to 0.1 µm, 4.0 to 20.0% by weight of the compound of the formula AND R. CON ^7 - (CH ₂ ) _n OH (I) wherein R 1 is alkyl or alkenyl having a carbon number of 10 to 20, R ₂ is hydrogen or (CH ₂ ) _n OH, n is 2 to 4, The composition of claim 1, wherein said composition contains from 0.5 to 6.0% by weight of the composition of the compound of formula (II) FCMCH ₂ (CH ₂ ) _m NHCH ₂ FCM (II) wherein FCM is a copper phthalocyanine residue and _m is 2 to 6.