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Waterproof agent for paper making coating and preparation method thereof

A water-resistant agent and coating technology, which is applied in the field of papermaking, can solve the problems of poor viscosity stability, not widely used, and high cost of ammonium zirconium carbonate, and achieve the effects of easy implementation and control, good stability, and good water resistance

Active Publication Date: 2018-09-28
寿光德圣造纸化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity stability of ammonium zirconium carbonate is poor, and its stability decreases when it is close to neutral and the pH value is less than 7. Compared with other water repellent agents with high solid content, the cost is high and the smell is heavy, so it is not widely used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A water-resistant agent for papermaking coating, the water-resistant agent is prepared from zirconium salt (zirconium hydroxide) and polybasic acid (malic acid), the pH of the water-resistant agent is 5.8, and the water-resistant agent is ZrO 2 The solid content is 9.3%.

[0024] Its preparation method comprises the following steps:

[0025] (1) Add 297.98g of malic acid solution with a mass fraction of 90% into the reaction vessel, then add 210.3g of ammonium hydroxide solution with a mass fraction of 25%, control the reaction temperature at 42°C, and react for 1.5h to obtain malic acid ammonium solution;

[0026] (2) Take the ammonium malate solution in step (1), add 500 g of zirconium hydroxide solution (containing 20% ​​zirconium oxide), control the reaction temperature at 40° C., stir and mix, and react for 2.5 hours to obtain the reaction solution;

[0027] (3) Take the reaction solution in step (2), add 0.1% sodium citrate by weight of the reaction solution, s...

Embodiment 2

[0029] A water-resistant agent for papermaking coating, prepared from zirconium salt (zirconium hydroxide) and polybasic acid (oxalic acid and tartaric acid), the pH of the water-resistant agent is 6-7, and ZrO in the water-resistant agent 2 The solid content is 9.8%.

[0030] The preparation method comprises the following steps:

[0031] (1) with 112.5g, massfraction is 80% oxalic acid and 375g, massfraction is 80% tartaric acid joins in the reaction vessel, then add 304.7g, massfraction is 23% ammonium hydroxide solution, control temperature of reaction 70 °C, after 1.5h of reaction, a mixed solution of ammonium oxalate and ammonium tartrate was obtained;

[0032] (2) Take the mixed solution of ammonium oxalate and ammonium tartrate in step (1), add 500g of zirconium hydroxide (containing 20% ​​zirconium oxide), control the reaction temperature at 52°C, stir and mix, and react for 3 hours to obtain a reaction solution;

[0033] (3) Take the reaction solution in step (2), a...

Embodiment 3

[0035] A water-resistant agent for papermaking coating, prepared from zirconium salt (zirconium hydroxide) and polybasic acid (malic acid, oxalic acid and tartaric acid), the pH of the water-resistant agent is 3.5-4.5, ZrO in the water-resistant agent 2 The solid content is 11.5%.

[0036] Its preparation method comprises the following steps:

[0037] (1) 223.48g (mass fraction is 90%) malic acid, 168.83g (mass fraction is 80%) tartaric acid and 469.03g (mass fraction is 80%) drop into reaction vessel, then add 761.96g ( The mass fraction is 23%) ammonium hydroxide solution is mixed, control reaction temperature 68 ℃, obtain the mixed solution of ammonium malate, ammonium oxalate and ammonium tartrate through 2h reaction;

[0038] (2) Take the mixed solution of ammonium malate, ammonium oxalate and ammonium tartrate in step (1), add 500g of zirconium hydroxide solution (containing 20% ​​zirconium oxide), control the reaction temperature at 55°C, stir and mix well, and react a...

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PUM

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Abstract

The invention relates to the technical field of paper making, in particular to a waterproof agent for paper making coating. The waterproof agent is prepared from zircon salt and polyacid, pH of the waterproof agent is 3.5-10, and solid content of ZrO2 in the waterproof agent is 9.3-12.8%. The invention further relates to a preparation method of the waterproof agent. The preparation method includes: (1), mixing the polyacid with ammonia water or an ammonium hydroxide solution, controlling reaction temperature, and allowing reaction to obtain a polyacid ammonium solution; (2), taking the polyacid ammonium solution in the step (1), adding the zircon salt, controlling reaction temperature, stirring and mixing well, and allowing reaction to obtain reaction liquid; (3), taking the reaction liquid in the step (2), adding a stabilizer, and stirring and mixing well to obtain liquid which is the waterproof agent. The waterproof agent has high stability, is not subject to pH impact and is used for being added into paper coating paint, and waterproof and hydroscopic experiments prove that the waterproof agent has good waterproof performance.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a water-resistant agent for papermaking coating and a preparation method thereof. Background technique [0002] The main components of the paint formulation for paper coating are pigments and adhesives, and dispersants, water-resistant agents, lubricants, etc. that can impart special properties to the product or enable normal processing operations are also added. As a component of coatings, water repellents can reduce the water solubility of pigments and adhesives after drying into films, improve the wet friction resistance and napping strength of coated paper, effectively improve the printability of coated paper, reduce hair loss, Phenomena such as falling powder. When coated paper is used for color printing, its surface must have good wet friction resistance, and for special waterproof or water-resistant coated paper such as water-soaked label paper and outdoor advertising...

Claims

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Application Information

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IPC IPC(8): D21H21/14
CPCD21H21/14
Inventor 桑杰儒王越彬梁玉强
Owner 寿光德圣造纸化工有限公司
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