Preparation method of silane modified water-based acrylic coating

A water-based acrylic and silane modification technology, applied in the direction of coating, can solve the problems of low adhesion, weak mechanical properties, poor water resistance, etc., and achieve the effect of improving adhesion, improving wear resistance and good wear resistance.

Inactive Publication Date: 2021-09-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, water-based acrylic coatings still have disadvantages such as low adhesion, poor water resistance, and weak mechanical properties, which greatly limit their application and development.

Method used

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  • Preparation method of silane modified water-based acrylic coating
  • Preparation method of silane modified water-based acrylic coating
  • Preparation method of silane modified water-based acrylic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare a kind of silane modified waterborne acrylic paint preparation method, its method is as follows:

[0039] 1) Water-based acrylic emulsion: 60 parts; calcium carbonate: 36 parts; surfactant stearic acid: 2 parts; defoamer polydimethylsiloxane: 1 part; leveling agent polyether modified polysiloxane : 1 part; Stir to mix evenly;

[0040] 2) The pH value of the coating described in the above step 1 is adjusted to be acidic 4;

[0041] 3) Mix 3 parts of silane crosslinking agent bis-(3-(triethoxysilane)propyl)-disulfide into the above coating and stir evenly;

[0042] 4) Carry out construction and complete the construction within 60 minutes.

Embodiment 2

[0044] Prepare a kind of silane modified waterborne acrylic paint preparation method, its method is as follows:

[0045] 1) Water-based acrylic emulsion: 80 parts; titanium dioxide: 18 parts; surfactant sodium dodecylbenzene sulfonate: 1 part; defoamer polyoxyethylene polyoxypropanolamine ether: 0.5 parts; Ether-modified polysiloxane: 0.5 parts; stir and mix evenly;

[0046] 2) The pH value of the coating described in the above step 1 is adjusted to be neutral 7;

[0047] 3) Mix 8 parts of silane crosslinking agent bis(3-triethoxysilylpropyl)amine into the above coating and stir evenly;

[0048] 4) Carry out construction and complete the construction within 15 minutes.

Embodiment 3

[0050] Prepare a kind of silane modified waterborne acrylic paint preparation method, its method is as follows:

[0051] 1) Water-based acrylic emulsion: 70 parts; silicon dioxide: 27 parts; surfactant cetyltrimethylammonium bromide: 1.5 parts; defoamer polyoxypropylene polyoxyethylene glyceryl ether: 0.75 parts; leveling Agent polyether modified polysiloxane: 0.75 parts; Stir and mix evenly;

[0052] 2) Adjust the pH value of the coating described in the above step 1 to be alkaline to 10;

[0053] 3) Mix 5 parts of silane crosslinking agent 1, 2-bis(triethoxysilyl)ethane into the above coating, and stir evenly;

[0054] 4) Carry out construction and complete the construction within 30 minutes.

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Abstract

The invention discloses a preparation method of silane modified water-based acrylic coating. The method mainly comprises the following steps: preparing water-based acrylic coating in advance, before construction, adjusting the pH value, compounding a modifier silane cross-linking agent with the water-based acrylic coating, uniformly stirring, and then carrying out construction. The modifier silane cross-linking agent firstly reacts with water in the water-based acrylic coating to hydrolyze to form a siloxy group; then silicon hydroxyl is condensed with each other to form a cross-linked network structure, so that the wear resistance, the water resistance and the mechanical property of the water-based acrylic coating are improved. Meanwhile, siloxane formed by hydrolysis has excellent interaction force with metal, inorganic, wood and polar macromolecules, so that the adhesive force of the coating on the base material can be remarkably improved. The modification technology is simple, convenient to construct and high in curing speed, and the performance of the coating is obviously improved, so that the modification technology has a relatively good application and development prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a method for preparing a silane-modified water-based acrylic coating. The coating has the advantages of high adhesion, high wear resistance, good water resistance and high mechanical properties. Background technique [0002] Coatings have functions such as protection, decoration, and color marking, and are widely used in social life, industry and agriculture. Most of the traditional coatings are solvent-based, which will produce a large amount of organic volatiles during the preparation and use, causing environmental pollution and harm to the human body. As the society pays more and more attention to environmental protection, the safety and environmental protection requirements for the coating production process, construction process and use space are becoming more and more stringent. Water-based paint is an environmentally friendly paint because of its low content of organic v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D7/63
CPCC09D133/00C09D7/63C08L2312/08C08K5/548C08K5/544C08K5/5419
Inventor 费正东梁初
Owner ZHEJIANG UNIV OF TECH
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