CS235187B1 - Pigment preparation based on beta modification of btalocyanine copper for printing and method of its preparation - Google Patents

Abstract

A pigment preparation based on beta modification of copper phthalocyanine for printing containing by weight 60 to 96% of beta modification copper phthalocyanine and 4 to 40% of a compound of the general formula R1.CO.N(CH2)„OH where Ri is a saturated or unsaturated aliphatic radical with a number of carbon atoms of 12 to 22, R2 is H or CH3 or (CH2jnOH and n = 2 to 4, is particularly suitable for printing systems due to its excellent dispersibility.

Description

The present invention relates to a phthalocyanine blue beta-based pigment preparation intended for illustrative intaglio printing and to a method for producing the preparation.

Modified forms of organic pigments CI Pigment Yellow 12, CI Pigment Yellow 13, CI Pigment Red 57 / Ca and CI Pigment Blue 15: 3 are used for illustrative intaglio printing. Phthalocyanine pigment beta modification (CI Pigment Blue 15) is known to have the best application properties : 3] when the average particle size of this pigment is about 0.05 cm, such fine particles are thermodynamically unstable and tend to form aggregates, thereby deteriorating the dispersibility of the pigment in printing systems. Considerable attention has been paid to solving the problem of preventing aggregate formation, for which purpose a phthalocyanine pigment has been treated with a variety of surfactants (US Pat. 2,305,379, 3,775,149, Jap. Pat. 45-20991, 46-32343, 48 -1821, 51-54620, British Pat. 900 757, 978 242, 1 100 103, etc.), but with which only partially The application of surfactants either failed to sufficiently suppress the formation of secondary particles and thus did not take advantage of the pigment's dyeing ability, or the pigment preparation caused poor flow properties of the paste after dispersion in toluene.

These drawbacks are overcome by a pigment preparation based on the beta modification of copper phthalocyanine for printing, which contains 60 to 96% by weight. % copper phthalocyanine beta modification and 4 to 40 wt. compounds of formula I

Ri. CO. N (CH 2) n OH

R2 (I) wherein

R1 is a saturated or unsaturated aliphatic radical having a carbon number of 12 to 22,

R 2 is H or CH 3 or (CH 2) n OH and n = 2-4.

A process for the preparation of a pigment preparation comprises adding an aqueous emulsion containing 10 to 80 g / l of a compound of formula (I) and 0.5 to 5 g / l of a compound of general formula to an aqueous suspension of phthalocyanine pigment at a concentration of 20 to 100 g / l. of formula II H2C-COOR3

HC — COOR3

AND

SO3Na (Π) where

R3 is a linear or branched aliphatic residue having a carbon number of 5 to 15, the mixture is stirred for 5 to 60 minutes. at a temperature of up to 90 ° C, acidified to pH 1-4 with hydrochloric acid, and the precipitate is filtered, washed and dried at 60 to 130 ° C.

A phthalocyanine beta modification pigment is used to prepare the preparation of the invention, preferably having a particle size of about 0.05 nm. This pigment can be produced, for example, by the method of Cs. aut. osv. 232 848 and in an aqueous suspension is treated with a surfactant of the formula I, which may be, for example, mono- or diethanolamide of palmitic acid, mono- or diethanolamide of stearic acid, mono- or diethanolamide of oleic acid, mono- or dipropanolamides of said acids or other carboxylic acids. number of carbon atoms 12 to 22, etc.

The surfactant (I) is applied in the presence of 1 to 18 wt. (based on the phthalocyanine pigment) of a compound of formula (II), which may be, for example, sodium diainylsulfosuccinate, sodium dihexylsulfosuccinate, sodium dioctylsulfosuccinate, sodium didecylsulfosuccinate, sodium ditridecylsulfosuccinate, etc. The presence of compound (II) the water-insoluble surfactant (I) perfectly "coating" the surface of the phthalocyanine pigment particles.

The surface treatment of the phthalocyanine pigment particles is carried out with the aid of the above-mentioned excipients in aqueous suspension with stirring, it being advantageous to finally heat the mixture to 50 to 90 ° C, since the product precipitates in the form of very filterable flakes. The pigment preparation is then separated, washed with water and dried in a suitable type of dryer.

The phthalocyanine blue beta-based pigment preparation prepared according to the invention is suitable for illustrative intaglio printing, somewhat dispersible in toluene, the toluene dispersion as well as the printing ink have favorable flow properties i.e. the desired viscosity and the printing ink provides high-quality printing. Halftone. The dispersion hardness of the pigment preparation, as evaluated from the gravure printing on the paper, is preferably very low, suggesting an optimal use of the coloring ability of the phthalocyanine pigment.

The examples illustrate the preparation for gravure printing according to the invention and the process for its preparation.

Example 1

To a 10 L kettle equipped with an anchor stirrer, thermometer, and duplicator was added 638 g of an aqueous paste of phthalocyanine blue beta modification with a dry matter content of 39.2 wt. and a mean pigment particle size of 0.04 nm, and 4500 ml of water. The mixture was stirred at room temperature for 80 minutes. An emulsion containing 500 ml of water, 30 g of stearic monoethanolamide and 1.5 g of sodium di- (2-ethylhexyl) sulfosuccinate was then added to the suspension with stirring over 10 minutes. The mixture was stirred for 30 min. was then heated to 70 ° C, acidified with 100 ml of 1: 1 dilute hydrochloric acid, and was maintained for 60 min. Thereafter, the suspension was filtered, the filter cake washed with water until the reaction to Cl- disappeared ^, and the product was dried at 80 ° C to constant weight. After grinding, 270 g of a pigment preparation was obtained, which was well wetted and dispersed in toluene. The printing ink prepared using modified phthalocyanine blue had a satisfactory viscosity and the test prints were of high quality both in shade and density.

Example 2

In the same manner as in Example 1, the phthalocyanine blue beta modification was treated with 16% by weight oleic acid diethanolamide. The pigment was treated in an aqueous suspension in the presence of sodium ditridecyl sulfosuccinate in an amount of 6% by weight. to phthalocyanine blue.

Example 3

A pigment preparation based on beta modification of copper phthalocyanine containing 12 wt. (calculated on copper phthalocyanine) palmitic acid monoethanolamide. The product had good application properties.

Example 4

A pigment preparation containing oleic acid dipropanolamide was prepared as in Example 1 and the application properties of the preparation were satisfactory.

Claims (2)

pRedmst A pigment preparation based on a beta modification of copper phthalocyanine for printing, characterized in that it comprises 60 to 96% by weight of copper phthalocyanine beta modification and 4 to 40% of a compound of the general formula I R 1. CO. N (CH 2) n OH where R1 is a saturated or unsaturated aliphatic radical having a carbon number of 12 to 22, R 2 is H or CH 3 or (CH 2) _n OH and _n = 2 to 4. 2. A process for the preparation of a pigment preparation as claimed in claim 1, comprising adding to the aqueous suspension of phthalocyanine pigment at a concentration of 20 to 100 g / l an aqueous emulsion of OBYLALEZ containing 10 to 80 g / l of a compound of formula (Ij). g / l of a compound of formula II IT2C — COOR3 HC — COOR3 SCbNa (Π) where R 5 is a linear or branched aliphatic residue having a carbon number of 5 to 15, the mixture is stirred for 5 to 60 min. at 50 to 90 ° C, acidified to pH 1 to 4 with hydrochloric acid, and the precipitate was filtered, washed and dried at 60 to 130 ° C.