SU1076317A1 - Carbon paper coating composition - Google Patents

Abstract

COMPOSITION OF COPYING OF PAPER'S COPY, containing soot, monoxide of iron oxide, indulin, methyl violet dye, wax-montan, bleaching wax, para-, fin, oil, oleic acid, characterized in that, in order to reduce marking, reduce the time of preparation of the coating, and reduce the viscosity of the melt coating at 85-100s, it additionally contains sodium butadiene rubber with a plasticity of 0.62-0.66 in the following ratio of components, wt.%: 17-18-18.0 Soot Monohydrate 5, 0-6,0 iron oxide 0.8-1.2 Indulin Dye 2.0-3.0 methylf Purple Wax-montan 18.0–20.0 crude Wax-montan (L 14.8–17.6 bleached 3.0–4.0 Paraffin 28.0–33.0. l Oil Oleinov 3.0–4.0 Acid Sodium Butadi, 6-1.0 ene rubber o :)

Description

The invention relates to the production of carbon paper and can be used in the pulp and paper industry in the manufacture of carbon paper for many times using for machine, writing. A reusable copying paper coating composition is known for containing carbon black, iron oxide monohydrate, violet dioxazine dye, methyl violet dye, wax montan, petroleum jelly, polyethylene oxidized wax, ethylene-vinyl acetate copolymer, castor oil, new acid l. However, such a composition does not provide high-quality copies while copying. Closest to the proposed positive effect achieved is a copier paper coating composition containing carbon dioxide, iron oxide monohydrate, induced methyl violet dye, crude wax montan, bleached wax montan, paraffin oil, oleic acid in the following ratio of components, wt.%: carbon black 14.0-16.0, iron oxide monohydrate 4.0-8.0, dye 2.5-3.5, raw wax 14, 18.5, bleached wax-montan 16.520, five; paraffin 3.5-7.0, oil 25.038, 0, oleic acid 3.5-7.0, And However, copying paper made with a known composition has an improved mark-off, and the coating itself is non-technological. It requires a long peretir of pigment and has a high viscosity of the melt, which makes it difficult to use in industrial conditions, in particular, it is difficult to transfer the melt to rut with pumps and adjust the thickness of the coating, the coating homogeneity is disturbed due to crystallization of the coating at lower temperatures. soot particles are observed. The purpose of the invention is to reduce stamping, shorten the preparation time of the coating, decrease the viscosity of the coating melt at 85-100s. The goal is achieved by the fact that the coating composition of carbon paper containing soot, iron oxide monohydrate, Indulin, methyl violet dye, raw wax-montan, bleached wax-montan, paraffin, oil, oleic acid, additionally contains sodium butadiene rubber with a plasticity of 0.620, 66 at the following ratio of components, wt.%: Soot 17.0-18-18.0 Iron oxide monohydrate 5.0-6.0 Indulin 0.8-1.2 Methyl violet-1 dye 2.0-3.0 Wax montan crude 18.0-20.0 Wax-montan bleached 14.8-17.6 Paraffin. 3, 0-4, 0 Oil 28.0-33.0 Oleic acid 3.0-4.0 Sodium-butadiene rubber 0.6-1.0 The rubber used is a high molecular weight solid polymerization product of butadiene in the presence of metallic sodium, has plasticity of 0.62-0.66 and a molecular weight of 1.7-105 - 1.9-10. As a carbon black, low-structural furnace soot of the marks ПГМ-33Н and ПМ-40 Н with a specific conditional surface 28-33, obtained with thermal oxidative decomposition of oil (PM-4ON) or gas-oil (PGM-33 N) raw material. As montan wax bleached, montan wax twice bleached is used. Industrial oil or castor oil can be used as an oil. Paraffin may be replaced by ozocerite or ceresin. The invention uses yellow iron oxide monohydrate. With the combination of carbon black and iron oxide monohydrate in the presence of sodium butadiene rubber, the process of carbon black modification takes place, resulting in a pigment with new characteristics that reduce the viscosity of paint and mark paper. Example 1. In a container; Oleic acid is loaded with a jacket and a stirrer g and stirred at 95-100s with stirring until the foaming stops, then dyes are gradually added and stirring is continued for about 4 hours. A carbon black paste is prepared with a magnetic mixer; -33 N 32.7, industrial oil AND 20 A 55.9, iron oxide pigment 9.9, sodium butadiene rubber (plasticity 0.66) 1.5, with a dispersity of particles of 5-10 microns, In a reactor equipped with a jacket and an agitator, load wax montan crude, wax montan bleached paraffin. The mixture is melted and a soot paste is added to the resulting melt with stirring, and the solution is colored; Then the mass is measured at 100-110 C for 1.5 hours ,. A carbon coating composition is obtained, containing, in wt%: carbon black 17.8, iron oxide monohydrate 5.4, methyl violet dye 2.5} indulin 1.0 crude wax 18.5, bleached wax montan 16.5, paraffin 3.0, industrial oil 26.0, castor oil 5.0, oleic acid 3.5, sodium butadiene rubber-0.8, The resulting melt is fed to the paint mill and rubbed once, the prepared carbon coating is applied to the base paper with a mass of 1 m 16 g at 90 ° C on a spray gun using a wire scraper. The size of the pump is 11 g / m. Samples of black copy paper are obtained, which are tested in accordance with GOST 489-66 on the Yatran electromechanical typewriter for the number of simultaneous and consecutive prints. The marking of the copy paper is also determined by estimating it from the optical density of the trace, which is obtained on a special instrument. To this end, transfer paper is transferred that is in contact with the receiving paper under the load of a cylindrical head with a diameter of 20 mm, which does not move. The coating is characterized by high melt stability, pumped by heated pumps, and does not crystallize when the temperature of the paint roller shafts decreases to 85 °. Example2. The coating composition specified in example 1 was prepared by mixing a dye solution in oleic acid, a paste of technical carbon containing, in wt.%: Carbon black PM-4OH 36.3, industrial oil AND 20 A 62.1 / sodium utadiene rubber plasticity 0.66) 1.6 and iron oxide monohydrate 5.4, stirring for 3 hours and the subsequent single grinding in the spray mill. Obtaining and testing copying paper as in Example 1. Example 3. Coating composition containing, in wt%: carbon black “33 H18 carbon black iron oxide pigment 5.0 dye methyl violet fat soluble 2.0 Indulin 1.2, wax-montan crude 18 , 0 wax-montan bleached 14.8, paraffin 4.0, industrial oil 27.0, castor oil 6.0, oleic acid 3.0, sodium butadiene rubber (with a plasticity of 0.64) 1.0, Copy paper with this coating is made analogously to example 1, Indicators of carbon paper: the number of simultaneous prints 8, the number of consecutive Skov 18 otmaryvanie 0.18. PRI JMer 4, cover. Containing, wt.%: Carbon black PGM-ZZN 17.0, iron oxide pigment 6.0, dye methyl-violet, fat-soluble 3.0, indulin 0.8, wax-montan crude 20.0, wax-Sontan bleached 17.6, paraffin 3 , 0, industrial oil 28.0, oleic acid 4.0, sodium butadiene rubber (plasticity 0.62) i 0.6. - Copy paper with this. . coated make analogously to example 1. Indicators of carbon paper: the number of simultaneous prints 8, the number of consecutive prints 15, mark out 0.15. Example 5 (prototype). According to example 1, a copy paper coating composition is prepared containing, in wt%: carbon black 16.0 j ferric oxide monohydrate 8.0 dye methyl-violet 2.5; Indulin 1, Ojvoskmontan crude 17.5; montan wax bleached 16.5, paraffin wax 3.5; industrial oil brand And 20 A 26.5, castor oil 5.0; oleic acid 3,5. Copy paper made according to example 1. The results of the test paper are presented in the table. Increasing the amount of carbon black or iron oxide monohydrate leads to an increase in the melt viscosity of the coating, and the result is a decrease in the amount of oil or paraffin in the proposed coating composition. With a decrease in the content of carbon black, iron oxide monohydrate or dyes, a decrease in the optical density of the resulting prints is observed. Increasing the content of dyes, oil, paraffin or oleic acid increases the marking of the copying paper. With a decrease in the amount of oleic acid, the dissolution of the dyes used in it deteriorates. Increasing the amount of raw montan wax, paraffin or reducing the amount of bleached montan wax in a coating composition worsens the quality of consecutive prints, and reducing the amount of raw montan wax or increasing the amount of bleached montan wax worsens the quality of simultaneous impressions. The use of sodium butadiene rubber in smaller quantities does not allow for the reduction of mark-off and melt viscosity of the coating. Increasing the amount of sodium butadiene Boro rubber does not make Bcnejgg a deterioration in the copying properties of paper.

As can be seen from the above data, the coping paper with the proposed coating has a lower mark out and a lower viscosity of the carbon coating than the prototype; type that provides improvement. copy quality and improves the manufacturability of the process of making copy paper.

by and

36.2

The number of simultaneous prints

Number of consecutive impressions 18

Mark up, units optical density 0.20 0.20

36.2

46.2

86.4

42.2

18

18

15

0.15 0.23

0.18

Claims (1)

COMPOSITION OF COATING OF COPYING PAPER containing carbon black, iron oxide monohydrate, Indiline, dye methyl violet, wax-montan crude, wax-montan bleached, para-, fin, oil, oleic acid, characterized in that, in order to reduce pickling, reducing the time of preparation of the coating, and reducing the viscosity of the coating melt at 85-100 ° C, it additionally contains sodium butadiene rubber with a plasticity of 0.62-0.66 in the following ratio of components, wt.%: Soot 17.0-18.0 Monohydrate ’ iron oxide 5.0-6.0 Indulin 0.8-1.2 Dye methyl violet 2.0-3.0 Wax Montan raw 18.0-20.0 Wax Montan bleached 14.8-17.6 Paraffin 3.0-4.0 .Oil 28.0-33.0 Oleic acid 3.0-4.0 Sodium Butadi rubber rubber 0.6-1.0