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Water-borne acrylic primer and preparation method thereof

A water-based acrylic and acrylic resin technology, used in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve problems such as chemical resistance, poor weather resistance, affecting coating film performance, and not participating in cross-linking reactions. Achieve better yellowing resistance, low cost and improved quality

Inactive Publication Date: 2015-10-28
黎司华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the primer made of thermoplastic acrylic resin, because the thermoplastic acrylic resin will yellow when baked at high temperature, which affects the performance of the coating film, and does not participate in the crosslinking reaction when curing, so its chemical resistance and weather resistance are not good. good

Method used

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  • Water-borne acrylic primer and preparation method thereof

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Effect test

Embodiment 1

[0027] The water-based acrylic primer of the present invention comprises the following components in parts by weight: 35 parts of silicone modified acrylic resin, 15 parts of amino resin, 2 parts of titanium dioxide, 9 parts of methyl propylene glycol, 5 parts of bentonite, 7 parts of ethanolamine , 12 parts of polyoxypropylene glyceryl ether, 4 parts of sodium dodecylbenzenesulfonate, and 20 parts of deionized water.

[0028] The preparation process steps are as follows:

[0029] (1) Weigh the materials in the raw material formula by weight fraction;

[0030] (2) Add silicone-modified acrylic resin, amino resin, and deionized water into a reaction kettle with a stirring device, heat up to 50°C, stir at a speed of 200 rpm, and stir for 1 hour;

[0031] (3) After the solid is completely dissolved, add ethanolamine, adjust the pH to 7, then raise the temperature to a reaction temperature of 70°C, stir at a speed of 300 rpm, and stir for 1 hour; then, add the rest of the raw mat...

Embodiment 2

[0033] The water-based acrylic primer of the present invention comprises the following components in parts by weight: 25 parts of epoxy modified acrylic resin, 25 parts of amino resin, 8 parts of titanium dioxide, 3 parts of methyl propylene glycol, 15 parts of zinc phosphate, 2 parts of ammonia water 4 parts, 4 parts of polyoxypropylene polyoxyethylene glyceryl ether, 10 parts of sodium cetylbenzenesulfonate, 30 parts of deionized water.

[0034] The preparation process steps are as follows:

[0035] (1) Weigh the materials in the raw material formula by weight fraction;

[0036] (2) Add epoxy-modified acrylic resin, amino resin, and deionized water into a reaction kettle with a stirring device, heat up to 70°C, stir at a speed of 400 rpm, and stir for 3 hours;

[0037] (3) After the solid is completely dissolved, add ammonia water, adjust the pH to 8, then raise the temperature to a reaction temperature of 90°C, stir at a speed of 500 rpm, and stir for 2 hours; then, add th...

Embodiment 3

[0039] The water-based acrylic primer of the present invention comprises the following components in parts by weight: 30 parts of polyester modified acrylic resin, 19 parts of amino resin, 5 parts of titanium dioxide, 6 parts of methyl propylene glycol, 9 parts of silicon dioxide, ethanolamine 4 parts, polydimethylsiloxane 8 parts, polysorbate 7 parts, deionized water 25 parts.

[0040] The preparation process steps are as follows:

[0041] (1) Weigh the materials in the raw material formula by weight fraction;

[0042] (2) Add polyester-modified acrylic resin, amino resin, and deionized water into a reaction kettle with a stirring device, heat up to 60°C, stir at a speed of 300 rpm, and stir for 2 hours;

[0043] (3) After the solid dissolves completely, add a pH regulator to adjust the pH to 7, then raise the temperature to a reaction temperature of 80°C, stir at a speed of 400 rpm, and stir for 1.5 hours; then, add the rest of the raw materials, and stir at a speed of 500 ...

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Abstract

The invention discloses water-borne acrylic primer and a preparation method thereof. The water-borne acrylic primer comprises, by weight, the following components of 25-35 parts of modified acrylic resin, 15-25 parts of amino resin, 2-8 parts of titanium dioxide, 3-9 parts of 2-methyl-1,3-propanediol, 5-15 parts of filler, 2-7 parts of a pH regulator, 4-12 parts of a defoaming agent, 4-10 parts of a dispersing agent and 20-30 parts of deionized water. The prepared water-borne acrylic primer can effectively prevent finishing coat from being eroded by wall body soluble substances, and the quality of the finishing coat is improved. No organic solvent is contained, no solvent evaporates during solidification, and the anti yellowing effect and the weather resistance are good. The preparation method of the water-borne acrylic primer has the advantages that the technology is simple, no special post-processing is needed, the cost is low, and the preparation method of the water-borne acrylic primer is suitable for requirements of industrial production.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a water-based acrylic primer and a preparation method thereof. Background technique [0002] Primer is the first coat of paint applied before painting the interior and exterior walls. Its main function is to close the base of the wall and block the capillary pores in the base, so as to effectively isolate the alkali of the substrate and prevent the seepage of alkali from damaging the coating. Acrylic primer is a one-component quick-drying primer composed of thermoplastic acrylic resin, saturated polyester, amino resin, pigments, additives and solvents. [0003] However, the primer made of thermoplastic acrylic resin, because the thermoplastic acrylic resin will yellow when baked at high temperature, which affects the performance of the coating film, and does not participate in the crosslinking reaction when curing, so its chemical resistance and weather resistance are not good. good. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D163/10C09D167/06C09D161/20C09D7/12C09D5/08
CPCC09D133/00C08L2205/03C08L2205/035C09D5/08C09D163/10C09D167/06C08L61/20C08L71/00C08K13/02C08K2003/2241C08K3/346C08K5/053C08K5/17C08K2003/328C08K5/42C08L83/04C08K3/36
Inventor 黎司华
Owner 黎司华
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