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Surface treatment method of kaolin used for offset ink

An offset printing ink and surface treatment technology, which is applied in the field of industrial preparation of superfine kaolin coated with polymer emulsion, can solve the problems of kaolin unevenness, organic solvent volatilization and pollution of the environment, etc.

Active Publication Date: 2012-10-10
WUHU ZHUOYUE NANO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to disclose a surface treatment method of kaolin for offset printing ink, so as to overcome the disadvantages of inhomogeneity and environmental pollution caused by organic solvent volatilization in the prior art coupling agent dry treatment of kaolin. Among high-grade offset printing inks, it can significantly improve the emulsification resistance, anti-fog resistance, drying balance, etc. of offset printing inks in the high-speed printing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 800 kilograms of tap water in the coating kettle of 1 cubic meter, add particle diameter again and be less than 2 μ m, whiteness is 200 kilograms of superfine kaolin dry powders of 91, is mixed with the kaolin suspension that solid content is 20% (weight concentration), in 15 kg of polymethacrylate polymer emulsion with a solid content of 30% was added under high-speed stirring at 200 rpm to prepare the mixture to be treated.

[0022] Adjust the pH of the mixture to be treated to 8 with 5% sodium hydroxide, raise the temperature to 75°C, and coat it at a constant temperature for 1.5 hours under the dispersion of a strong shear emulsification pump. The emulsification pump is a general-purpose equipment, such as Qidong Huilong Mixing Equipment Factory The produced HDX1 / 140 emulsification pump has a power of 5kw and a speed of 2000 rpm.

[0023] Filter the slurry while it is hot until the filter cake has a water content of less than 60%, and dry it at 105°C to obtain t...

Embodiment 2

[0025] Add 700 kilograms of tap water in the coating still of 1 cubic meter, add particle diameter again and be less than 2 μ m, whiteness is 300 kilograms of superfine kaolin dry powders of 91, is mixed with the kaolin suspension that solid content is 30% (weight concentration), in 25 kg of styrene and butyl acrylate copolymer emulsion with a solid content of 40% were added under high-speed stirring at 200 rpm to prepare the mixture to be treated.

[0026] Adjust the pH of the mixture to be treated to 7 with 10% sodium hydroxide solution, raise the temperature to 65° C., and coat at a constant temperature for 2.5 hours under the dispersion of a strong shear emulsification pump.

[0027] Filter the slurry while it is hot, and dry it at 105°C to obtain the product of the present invention. The product has an average particle size of 2 μm, a whiteness of 91, a high polymer content of 3.3%, an oil absorption value of 19.5, and no agglomeration. The offset printing ink made of the...

Embodiment 3

[0030] Add 750 kilograms of tap water in the coating still of 1 cubic meter, add particle diameter again and be less than 2 μ m, whiteness is 250 kilograms of superfine kaolin dry powders of 91, is mixed with the kaolin suspension that solid content is 25% (weight concentration), in 10 kg of polymethacrylate polymer emulsion with a solid content of 40% and 15 kg of 40% vinyl acetate homo / copolymer emulsion were added under high-speed stirring to prepare the mixture to be treated.

[0031] Adjust the pH of the mixture to be treated to 9 with 15% sodium hydroxide solution, raise the temperature to 85° C., and coat at a constant temperature for 3 hours under the dispersion of a strong shear emulsification pump.

[0032] Filter the slurry while it is hot, and dry it at 105°C to obtain the product of the present invention. The product has an average particle diameter of 2 μm, a whiteness of 90.1, a high polymer content of 4%, an oil absorption value of 18.0, and no agglomeration. T...

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Abstract

The invention discloses a surface treatment method of kaolin used for offset ink. The principle includes that high polymer is coated on the surface of superfine kaolin. The main steps includes that suspension of ground superfine kaolin is added with polymer emulsion; temperature is controlled to be 60-85 DEG C and pH value is controlled to be 7-9, under the action of high shearing force of an emulsification pump, dispersion of the superfine kaolin and coating of the polymer emulsion are synchronously completed; and finally filtering and dry depolymerization at 80-110 DEG C are carried out to obtain the high polymer coated superfine kaolin powder. The product prepared by the invention can obviously improve the advantages of demulsibility, misting resistance, dry balance and the like of inkin quick printing of high-grade offset ink.

Description

technical field [0001] The invention relates to a surface treatment method of functional filler kaolin used in offset printing ink, in particular to an industrialized preparation method of superfine kaolin coated with high polymer emulsion. Background technique [0002] The role of fillers for ink is to adjust the consistency and ink properties of the ink, such as the viscosity, fluidity, and color density of the ink, while reducing the production cost of the ink. With the updating of printing machinery and equipment and the improvement of printing technology, the printing speed of a single sheet has risen from thousands of sheets per hour to more than 20,000 sheets, which puts forward higher requirements for the quality of offset printing inks. Concentration, high transparency and gloss, suitable viscosity and fluidity, it must also have anti-emulsification, anti-fogging, drying balance, etc. in high-speed printing, and the traditional ultra-fine calcium carbonate filler ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/42C09C3/10C09D11/00C09D11/03
Inventor 顾达姚成邓丽丽王旭辉
Owner WUHU ZHUOYUE NANO NEW MATERIALS
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