Two-component waterborne polyurethane industrial paint with excellent physical performance and preparation method thereof

A technology of water-based polyurethane and physical properties, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor surface effect, high cost, good hardness, etc., to ensure excellent performance, high cost performance, The effect of high impact resistance

Inactive Publication Date: 2017-03-15
中山蓝海洋水性涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkyd water-based paint has good brightness but low hardness and poor anti-corrosion performance
One-component polyurethane water-based paint has good flexibility, but low hardness and high cost
Acrylic water-based paint has good hardness but poor toughness and poor adhesion
Epoxy water-based industrial paint has good anti-corrosion performance, but the surface effect is not good and the decoration is poor
Therefore, most of the existing water-based industrial paints on the market have certain defects.

Method used

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  • Two-component waterborne polyurethane industrial paint with excellent physical performance and preparation method thereof
  • Two-component waterborne polyurethane industrial paint with excellent physical performance and preparation method thereof
  • Two-component waterborne polyurethane industrial paint with excellent physical performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0077] The preparation method of the above-mentioned two-component waterborne polyurethane industrial paint with excellent physical properties comprises the following process steps:

[0078] Ⅰ. Preparation of component A: Add water, water-based hydroxyacrylic resin emulsion, water-based hydroxyurethane resin, dispersant, wetting agent, and part of defoamer to the dispersion tank, and disperse at a medium speed; then slowly add titanium dioxide and talc Powder, superfine calcium carbonate, sericite powder, aluminum zinc phosphomolybdate antirust pigment, add water to wash the tank wall, disperse at high speed for 20-50 minutes until the fineness is ≤50 microns; then add organic bismuth / Zinc composite catalyst, leveling agent, thickener, alkoxysilane adhesion promoter and the rest of the defoamer, dispersed at a medium speed for 20 to 40 minutes; take samples to test the fineness and viscosity of the finished product, filter and pack to obtain Group A point.

[0079] Ⅱ. Prepar...

Embodiment 1

[0085] A two-component waterborne polyurethane industrial paint with excellent physical properties consists of the following components by weight percentage:

[0086] A component

[0087]

[0088]

[0089] Wherein the weight percentage sum of A component is 100%.

[0090] B component

[0091] Sulfonate modified HDI trimer 100%

[0092] Wherein the sum of weight percentages of component B (curing agent) is 100%.

[0093] Component A (main paint) and component B (curing agent) are mixed according to the NCO / OH equivalent ratio of n(-NCO):n(-OH)=1.3, that is, the -NCO functional group in component A and component B The molar ratio of equivalents of -OH functional groups in a part is 1.3.

[0094] Process steps for preparing the above-mentioned two-component waterborne polyurethane industrial paint with excellent physical properties:

[0095] 1. Preparation of component A: Weigh the raw materials according to the weight percentage of the above components, add water, wat...

Embodiment 2

[0100] A two-component waterborne polyurethane industrial paint with excellent physical properties consists of the following components by weight percentage:

[0101] A component

[0102]

[0103] Wherein the weight percentage sum of A component is 100%.

[0104] B component

[0105] Sulfonate modified HDI trimer 100%

[0106] Wherein the sum of weight percentages of component B (curing agent) is 100%.

[0107] Component A (main paint) and component B (curing agent) are mixed according to the NCO / OH equivalent ratio of n(-NCO):n(-OH)=1.3, that is, the -NCO functional group in component A and component B The molar ratio of equivalents of -OH functional groups in a part is 1.3.

[0108] Process steps for preparing the above-mentioned two-component waterborne polyurethane industrial paint with excellent physical properties:

[0109] 1. Preparation of component A: Weigh the raw materials according to the weight percentage of the above components, add water, water-based hyd...

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Abstract

The invention provides a two-component waterborne polyurethane industrial paint with the excellent physical performance. According to the industrial paint, mixed hydroxyl resin of waterborne acrylic resin emulsion and waterborne polyurethane resin is adopted as a main film forming agent, an environment-friendly organic bismuth and organic zinc composite catalyst and other auxiliaries are adopted, a sulfonate modification HDI trimer is adopted as a curing agent, uniform dispersion can be achieved without hydrotropy agents, an obtained paint film is excellent in hardness and scratch resistance, and the ultra-strong adhesive force and impact resistance are achieved. The two-component waterborne polyurethane industrial paint is a quick-drying waterborne two-component polyurethane coating, the drying speed is increased by three times compared with the drying speed of general industrial paint products, the outstanding environment-friendly advantage is achieved, and TVOC can be controlled to be 65 g / L or below. The invention further provides a preparation method of the two-component waterborne polyurethane industrial paint with the excellent physical performance.

Description

technical field [0001] The invention relates to the field of water-based polyurethane coatings, in particular to a two-component water-based polyurethane industrial paint with excellent physical properties and a preparation method thereof. Background technique [0002] Water-based paint is the mainstream direction of the world's paint development. With the continuous advancement of industrialization and urbanization, people have gradually realized that economic development cannot be at the expense of the environment, and began to pursue low-pollution or even non-pollution industrial development models. In order to meet the requirements of environmental protection and energy saving, the development of low-VOC environmentally friendly water-based coatings has become an inevitable trend in the development of the coatings industry. In recent years, the development of domestic water-based coatings has been rapid, especially the demand for industrial water-based coatings is the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/12C08G18/64C08G18/62C08G18/22
CPCC08G18/222C08G18/227C08G18/6216C08G18/6229C08G18/6415C08K3/22C08K3/26C08K3/32C08K3/34C08K5/544C08K13/02C08K2003/2241C08K2003/265C08K2201/014C09D5/08C09D175/04C09D7/61C09D7/63
Inventor 陈小文阙小玲蒋建平肖国钦蒋建伟
Owner 中山蓝海洋水性涂料有限公司
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