JPH0457867A - Black printing ink composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a black printing ink composition, and more particularly to a black printing ink composition having excellent optical suitability and fluidity.

[Conventional technology]

Conventionally, various black printing inks have been used in various printing fields such as books, newspapers, magazines, and various pamphlets. Carbon black is generally used as the main pigment component in black printing ink formulations. Black printing inks are dispersed in a liquid medium consisting of carbon black and usually a tone modifier, oil, face or water and other compounds.

[Problem to be solved by the invention]

When preparing carbon black pigments suitable for black printing ink formulations, in addition to carbon black having the necessary properties as a pigment, there is a strong need to develop carbon black that can respond to high added value and diversification. It is requested.

Generally, the most desirable properties of carbon black as a black printing ink are good fluidity, high blackness or mass tone, and high tinting strength. Furthermore, since the shearing force of the dispersing machine generally used when dispersing carbon black in a suitable vehicle is relatively weak, the quality of the dispersibility of carbon black is also an important factor.

As printing speeds have increased in recent years, especially in offset printing, the thickness of ink after printing is thinner than in other printing methods, so a large amount of carbon black is blended in order to achieve the same degree of blackness. If a large amount of carbon black is blended, the fluidity of the ink will deteriorate significantly. For this reason, it is desired that the ink has good fluidity while maintaining a high degree of blackness.

To improve the fluidity of the ink, it is possible to change only the fluidity by reducing the amount of carbon blank blended or changing the carbon black particle size and oil absorption, but the black density and dispersion of the ink itself can be changed. This had the disadvantage that it affected the properties of the ink, disrupted the balance of the ink, and made it impossible to obtain the desired result. Therefore, carbon black, which is a black pigment, is considered to be an element to solve this problem, and there is a demand for modification of carbon black.

[Means to solve the problem]

The inventors of the present invention have conducted intensive studies to solve these problems, and have found that these problems can be improved by impregnating carbon black with a trace amount of an amine compound. That is, the present invention was achieved by discovering that by blending carbon black with an amine compound attached as a black pigment, it is possible to provide a black printing ink with good fluidity without significantly changing the blackness or formulation of the desired ink.

The present invention will be explained in detail below.

As the black color used in the black ink composition of the present invention,
Carbon black used for normal ink use, specifically particle size is 10 to 100 mμ, DBP oil absorption is 20 to 3
in the range of 50d/100g, preferably 950°
Examples include carbon black in which the amount of oxygen calculated from oxygen compounds in the volatile composition of carbon black is 5 .mu./g or more, more preferably 10 to 100 .mu./g.

Oxygen compounds may be added to the surface of carbon black by a known oxidation treatment using an oxidizing agent such as ozone gas, oxygen-containing gas, or nitric acid.

The black pigment used in the present invention is carbon black with an amine compound attached thereto, and the amount of the amine compound attached to the darkening carbon black is preferably 0.01 to 2.0% by weight based on the carbon black. can.

If the amount of impregnation is less than 0.01% by weight, no significant effect will be obtained, and if it is more than 2.0% by weight, no effect will be obtained compared to the ratio of the amount of impregnation. Examples of amine compounds include straight-chain hydrocarbons and side-chain hydrocarbons having 4 or less carbon atoms, specifically 1,4 diaminobutane, 1,3 diaminopropane, and di-2 diaminopropane. ,
Ethylenediamine and the like are preferably used.

The vehicle for black printing ink is linseed oil, alkyd resin,
Ink is made by kneading monoteari, which is a mixture of phenol resin and the like dissolved in mineral oil, with the black pigment carbon black, other drying agents such as hydroperoxide, and wax such as carnauba wax.

These blending ratios vary depending on the type of dispersion machine, the type of carbon black used, or the type of varnish, but -
For boat fishing, use 5-20% by weight of carbon black, 20-60% by weight of resin face, 5-25% by weight of linseed oil,
The solvent content is 10 to 30% by weight, the color tone modifier is 0 to 15% by weight, and the desiccant is 1 to 3% by weight.

As a dispersion method, the ink composition can be obtained by mixing and dispersing the above composition using a dispersing machine such as a vertical stirrer, a roll mill such as a three-roll mill, or a sand mill.

The black printing ink obtained as described above has excellent fluidity while maintaining blackness.

〔Example〕

The present invention will be explained in more detail with reference to Examples.

Example 1 Carbon black “#40B” (Mitsubishi Kasei Corporation) 30g
0.03 g of 1.4 diaminobutane was dissolved in 33 g of water in advance, placed in a polyethylene bag, mixed and granulated, and then dried in a hot air dryer at 115°C for 4 hours.

Using the obtained carbon black, prepare a mixture according to the formulation in Table IJ, knead it according to the method in Table 2, measure the physical properties according to Table 3, and check the results. It is shown in "Table-4".

Example 2 Carbon black “#40B” (Mitsubishi Kasei tlJ) 30
After dissolving 0.3 g of 1.4 diaminobutane in 33 g of water in advance and placing it in a polyethylene bag, mixing and granulating it,
It was dried for 4 hours in a hot air dryer at 115°C.

Using the obtained carbon black, a mixture was prepared according to the formulation in "Table 1", kneaded according to the method in "Table 2", and the physical properties were measured according to "Table 3". are shown in "Table 4".

Example 3 Carbon black “#40B” (Mitsubishi Kasei ■) 30g
is placed in a glass rotary kiln, and the amount of ozone gas generated is 1
Air-containing gas generated at 1.0 g/h per hour3
/h was treated for 3 hours. The carbon black was taken out of the kiln, 0.3 g of 1.4 diaminobutane was dissolved in 33 g of water, placed in a polyethylene bag, mixed and granulated, and placed in a hot air dryer at 115°C for 4 hours. Dry.

Using the obtained carbon black, a mixture was prepared according to the formulation in "Table 1", kneaded according to the method in "Table 2", [physical properties were measured according to Table 3J, and the results were It is shown in "Table-4".

Example 4 Carbon black “#40B” (Mitsubishi Kasei ■) 30g
After dissolving 0.3 g of 1.3 diaminopropane in 33 g of water in advance and placing it in a polyethylene bag, mixing and granulating it,
It was dried for 4 hours in a hot air dryer at 115°C.

Using the obtained carbon black, a mixture was prepared according to the formulation of I[-1J, kneaded according to the method in "Table 2", and physical properties were measured according to "Table 3", and the results were It is shown in "Table-4".

Example 5 Carbon black “”#10B” (Mitsubishi Kasei ■) 30
After dissolving 0.3 g of 1.4 diaminobutane in 25 g of water in advance and placing it in a polyethylene bag, mixing and granulating it,
It was dried for 4 hours in a hot air dryer at 115°C.

Using the obtained carbon black, a mixture was prepared according to the formulation in "Table 1", kneaded according to the method in "Table 2", and the physical properties were measured according to "Table 3". are shown in "Table 4".

Comparative Example 1 A blend was prepared using carbon black "'440B" (Mitsubishi Kasei n) according to the blending recipe in "Table 1", and
The meat was kneaded according to the method shown in "Table 2", and the physical properties were measured according to "Table 3", and the results are shown in "Table 4".

Comparative Example 2 Using carbon black "#10B" (Mitsubishi Kasei ■), a mixture was prepared according to the formulation in "Table-1", and kneaded according to the method in "Table-2", and the mixture was prepared as shown in "Table-3". Physical properties were measured according to the following, and the results are shown in "Table 4".

The specific surface area was measured by the B, E, T method using a "Two Buttomatic Nitrogen Adsorption Apparatus" (manufactured by Carlo Erba).

The volatile composition is determined by weighing approximately 0.2 g of carbon black, placing it in a quartz sample tube, and reducing the pressure to 10-2 Hg.
The decompression system is closed and the carbon black is inserted into an electric furnace at 950°C to decompose and volatilize the oxygen compounds and hydrogen compounds present in the carbon black.

The volatile components are collected into a fixed volume gas collection tube through a Teppler pump. The amount of gas is calculated from pressure and temperature.

The composition of the gas is analyzed by gas chromatography to determine the amount of gas generated and the composition of each gas. Note that the insertion time into the electric furnace is 30 minutes.

The total amount of oxygen is calculated using the following formula.

Total oxygen amount (g/g) = CO (mg/g) x 16/28
+CO" ([/g) was measured using a glass electrode pH meter.

Table-1 Combination prescription Table-2 Kneading method table 〔Effect of the invention〕 According to the present invention, Excellent optical suitability and fluidity A black printing ink composition can be obtained.

Hitozo

Claims (1)

[Claims] (1) A black printing ink composition containing carbon black to which an amine compound is attached as a black pigment.