Black printing ink

 

(57) Abstract:

Features black printing ink. As pigment ink contains chimney soot with the degree of coalescence of particles in the aggregate in the range of 0.005-0,09 and mineral oil, oleic acid, liquid rubber, asphalt enamel, indulin. Paint is characterized by high technological properties, quick fixing on paper, a pronounced blue tint. Used for letterpress printing. table 1.

The invention relates to the printing industry, namely, black printed colors.

Famous black printing ink containing carbon black as a pigment having on its surface polycyclic hydrocarbons, insoluble in paraffinic solvents and, in addition, oleic acid, inulin, engine oil [1]

Known paint (poor technological properties (poor dispersibility, low values of yield strength and flow, high viscosity), the duration of final fixation on the paper, in addition, the paint has a slight blue tint.

Known also black paint containing as pigment carbon black gas channel and the mixture channel soot from the furnace, and so is Kimi properties reduced time for final fastening on paper, but currently does not meet the increasing demands of the printing industry [2]

The purpose of the invention improve the technological properties of the paint, reducing the time the final fixing on paper, the deepening blue hue.

The objective is achieved by the fact that the black printing ink contains as a pigment chimney soot with the degree of coalescence of particles in the aggregate in the range of 0.005-0,09, as well as industrial oil, oleic acid, inulin, varnish, bitumen oil, addition of liquid rubber SKDP-N, and the components of the paint are taken in the following ratio, wt.

Carbon black with a degree of coalescence of particles in the aggregate in the range of 0.005-0,09 - 15-20

Liquid rubber SKDP-N 2-4

Oleic acid 2-10

Indulin 2-4

Bitumen oil 15-20

Mineral oil the Rest.

Carbon black having a degree of accretion of particles in the unit within 0,005-0,09 receive new technology, adjusting the reaction the number of particles and the size of the unit. The degree of coalescence of particles in the unit is the main feature.

As the liquid rubber used is a copolymer of butadiene with Pieper the acid is used in the production of AA indoline and as an excellent wetting agent, increasing the fluidity of the paint. Is used in the amount of 2-10 wt.

Solid resin oil bitumen special brand of G is used as the foaming agent in the amount of 15-20 wt. soluble in mineral oil. For example, a solution of bitumen in the industrial oil AND 40A in the amount of 20-40% is called bitumen varnish and can be used directly in the manufacture of paints.

As the mineral oil can be used any oil used in the printing industry: all industrial (I-8A to-40A) spun, machine, printing (MP-1 MP-13), oil for rolling machines (PS-28), etc. from 42 to 70%

The basis of the invention lies established fact (unexpected effect), which consists in the fact that the technological properties of the ink, the speed of its fastening and tone depend not only on the known characteristics of soot: particle size, structure and surface chemistry, but also on the degree of fusion of the particles in unit of soot, or in other words, the degree of openness has a particulate primary aggregate. In a certain interval of values of the degree of fusion of the particles in unit of 0,005 0,09 carbon black as the pigment used in the black printing ink, gives (KRA is OK paint.

Existing methods of determining the openness of the aggregate of carbon black based on the statistical relationship between the form of a flat image of the unit on the electron micrograph with the volume of voids in the aggregate. They provide a relationship between the known physico-chemical properties of the carbon black and the amount of its units expressed by the system of two equations:

< / BR>
where

SMspecific surface area, determined by electron microscope;

S specific external surface, taking into account the loss of part of the square on the contacts, which is determined by the adsorption of cetyltrimethylammonium bromide (CTAB);

M the rate of absorption of dibutyl phthalate;

K the average number of contacts for a single particle;

the average degree of coalescence of particles in the aggregate;

n the number of particles in the aggregate.

Carbon black is used in the proposed composition has a degree of accretion of particles in the range of 0.005-0,09.

When using carbon black with a degree of coalescence of particles in the unit above 0,09 properties of the ink remain on the level of the prototype: falls blue tint increases the time of fixing the ink on the paper and to get the soot with a degree of coalescence of particles less than 0,005 technically very difficult, the yield of soot falls down, the LASS="ptx2">

A paint was prepared as follows.

In the apparatus with stirrer pour mineral oil and liquid rubber, heat the mixture to a temperature of 85oC, soot fall asleep, stirred for 12 h to obtain a homogeneous coarse dispersion, which is then fray on the appropriate equipment to the degree of dispersion of 10 μm. The resulting paste is mixed with bitumen varnish and oleate of indoline, passed through a dye-grater to remove air bubbles and stariway in metal drums (possible options are a separate download of oleic acid and indoline).

Example 1. In the apparatus with stirrer at 45 rpm load 660 kg of industrial AND oil-40A, 20 kg of oleic acid, 20 kg of liquid rubber, SKDP-N, mix the contents of the apparatus 2 including Load 300 kg of carbon black with a degree of coalescence of the particles in unit of 0.003, mix system 12 h and fray on kraskoterke to the degree of dispersion of 2-3 μm. 500 kg of the prepared dispersion with a content of carbon black 30 wt. loaded into the apparatus with stirrer, add 500 kg of bitumen varnish containing bitumen 30 wt. and 10 kg of indoline. The paint is stirred for 4 h at 80oC, then cooled to 40oC, passed through kraskoterke to remove air bubbles and analizu as pigment commercially used in the printing industry soot channel K-354, with the degree of coalescence of particles in the unit 0,124. Paint analyze. The data given in the table.

Conditions of experience again, but use soot with the degree of coalescence of particles in the unit 0,003, 0,005, 0,01, 0,025, 0,05, 0,09, 0,11. As soot with the degree of coalescence of particles in the unit 0,11 used a commercially available oven soot P 234. Data on the properties of the colors shown in the table.

As follows from the analysis of the data table, the viscosity of the dye obtained according to the attached invention, is almost two times lower than that of the paint using a serial soot, fluidity four times higher, spreading on 8-16 mm longer, which confirms the increasing technological properties of the paint. At the same time, the final consolidation of the ink is reduced in 2-2,5 times, the prints have a distinct blue on

Black printing ink containing a pigment based on carbon black, indulin, oleic acid, petroleum bitumen and mineral oil, characterized in that as a pigment it contains soot with the degree of coalescence of particles in the unit within 0,005 0,09 and additionally rubber SDPN on the basis of a copolymer of butadiene with piperylene in the following ratio, wt.

Pigment 15 20

Oleic acid 2 10BR>
Mineral oil Ostalnoe

 

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,

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