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Water-based varnish with good resolubility and high water scrubbing resistance and preparation method therefor

A technology of resolubilization and water rub resistance, applied in the direction of coating, etc., can solve the problems of reduced surface water rub resistance, affecting the waterproof effect of products, and easy damage of varnish layer, so as to achieve good water rub resistance, solve varnish resolubility and water resistance The contradiction of rubbing property and the effect of not easy to block the board

Active Publication Date: 2014-03-19
SHANGHAI CHENGYING NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based varnishes can be dissolved with solvents after being coated into a film, but water-based varnishes cannot, so there will be different degrees of plate blocking problems when coating and using
Adding a good water-soluble resin to the formula can solve the problem of plate blocking, but it will reduce the water rub resistance of the surface after the varnish film is formed, and the varnish layer is easily damaged at the condensation roller of the coating machine and in a humid environment
Certainly, prior art also has to add common hydrophobic agent or add a waterproof coating, but the surfactant remaining in the varnish coating will always affect the waterproof effect of the product

Method used

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  • Water-based varnish with good resolubility and high water scrubbing resistance and preparation method therefor
  • Water-based varnish with good resolubility and high water scrubbing resistance and preparation method therefor
  • Water-based varnish with good resolubility and high water scrubbing resistance and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The water-based varnish of the present embodiment comprises each component of weight portion shown in table 1:

[0026] Table 1

[0027]

[0028] The preparation of the water-based varnish of the present embodiment comprises the following processing steps:

[0029] (1) Prepare materials according to the components and contents (parts by weight) shown in Table 1;

[0030] (2) First mix water-based alkali-soluble acrylic resin, neutralizer and 4 parts of deionized water, and raise the temperature to 60-70°C to obtain an aqueous solution of acrylate;

[0031] (3) Put the acrylate aqueous solution, water-based acrylic emulsion, water-based wax slurry and hydrophobic agent prepared in (2) into the reaction kettle, and stir evenly at a low speed of 300-500 rpm;

[0032] (4) After mixing the solvent ethanol and the remaining 11 parts of deionized water evenly, add it to the reaction kettle while stirring, and stir at a low speed of 300-500 rpm for 5-10 minutes;

[0033]...

Embodiment 2

[0035] The water-based varnish of the present embodiment comprises each component of weight portion shown in table 2:

[0036] Table 2

[0037]

[0038]

[0039] The preparation of the water-based varnish of the present embodiment comprises the following processing steps:

[0040] (1) Prepare materials according to the components and contents (parts by weight) shown in Table 2;

[0041] (2) First mix water-based alkali-soluble acrylic resin, neutralizer and 3 parts of deionized water, and raise the temperature to 60-70°C to obtain an aqueous solution of acrylate;

[0042] (3) Put the acrylate aqueous solution, water-based acrylic emulsion, water-based wax slurry and hydrophobic agent prepared in (2) into the reaction kettle, and stir evenly at a low speed of 300-500 rpm;

[0043] (4) After mixing the solvent ethanol and the remaining 7 parts of deionized water evenly, add it to the reaction kettle while stirring, and stir at a low speed of 300-500 rpm for 5-10 minutes...

Embodiment 3

[0046] The water-based varnish of the present embodiment comprises each component of weight portion shown in table 3:

[0047] table 3

[0048]

[0049] The preparation of the water-based varnish of the present embodiment comprises the following processing steps:

[0050] (1) Prepare materials according to the components and contents (parts by weight) shown in Table 3;

[0051] (2) First mix water-based alkali-soluble acrylic resin, neutralizer and 4 parts of deionized water, and raise the temperature to 60-70°C to obtain an aqueous solution of acrylate;

[0052] (3) Put the acrylate aqueous solution, water-based acrylic emulsion, water-based wax slurry and hydrophobic agent prepared in (2) into the reaction kettle, and stir evenly at a low speed of 300-500 rpm;

[0053] (4) After mixing the solvent ethanol and the remaining 16 parts of deionized water evenly, add it to the reaction kettle while stirring, and stir at a low speed of 300-500 rpm for 5-10 minutes;

[0054]...

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Abstract

The invention relates to a water-based varnish with good resolubility and high water scrubbing resistance and a preparation method therefor. The water-based varnish comprises the following ingredients, by weight, 30-50 parts of water-based acrylic emulsion, 5-30 parts of water-based alkali-soluble type acrylic resins, 10-20 parts of deionized water, 10-30 parts of ethanol, 0.5-8 parts of neutralizers, 5-15 parts of hydrophobic agents, 1-5 parts of water-based wax slurry, and 0.1-0.4 part of auxiliary agents. During preparation, part of deionized water is taken and mixed with water-based alkali-soluble type acrylic resins and neutralizers, the mixture is heated up to the temperature of 60-70 DEG C, and an acrylic ester aqueous solution is obtained; the acrylic ester aqueous solution, water-based acrylic emulsion, ethanol, hydrophobic agents, water-based wax slurry and the rest of deionized water are put into a reactor, and stirred uniformly at a low speed; then auxiliary agents are added, the above mixture is stirred at a high speed, and a water-based varnish is obtained. The water-based varnish has good resolubility during coating usage, does not block plates, can achieve high water scrubbing resistance after film forming, and well solves the problem of contradiction of resolubility and water scrubbing resistance after film forming of a varnish.

Description

technical field [0001] The invention relates to a water-based varnish used for inner lining paper of cigarette packs, in particular to a water-based varnish with good resolubility and high water rub resistance and a preparation method thereof. Background technique [0002] The existing water-based varnish has met the requirements of leveling, temperature resistance and VOC, basically replaced the original solvent-based varnish, and has been widely used in the field of cigarette packs and other paper packaging. Solvent-based varnishes can be dissolved with solvents after coating to form a film, but water-based varnishes cannot, so there will be different degrees of blocking problems when coating and using. Adding a good water-soluble resin to the formula can solve the problem of plate blocking, but this will reduce the water rub resistance of the surface after the varnish film is formed, and the varnish layer is easily damaged at the condensation roller of the coating machine...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D7/12
Inventor 虞明东戴胜杰段孔荣李付亚
Owner SHANGHAI CHENGYING NEW MATERIALS
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