Scratch resistance waterborne polyurethane coating and preparation method thereof

A water-based polyurethane and scratch-resistant technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of loss improvement effect, narrowing of coating application range, poor ductility of coating film, etc., and achieve good ductility and application range Broad, low-cost effects

Active Publication Date: 2012-07-11
ANHUI TIANAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large surface free energy of nanoparticles, the particles are easy to agglomerate, thus losing part of the improvement effect of adding nanoparticles
[0005] In addition, by one-sidedly increasing the hardness of the polymer coating film to improve the scratch resistance of the coating film, the ductility of the coating film will be poor due to too high hardness, which will narrow the scope of application of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example is used to illustrate the coating preparation method of the present invention.

[0034] The steps to make paint are:

[0035] (1) Take 3 parts of reactive silicone, and add 2 parts of co-solvent isopropanol to it, and after the reactive silicone is dissolved, a reactive silicone solution is obtained and set aside;

[0036] (2) Take 35 parts of water-based acrylic resin and stir, and add 17 parts of nano-calcium carbonate, 35 parts of water-based polyurethane, the organic silicon solution and 20 parts of curing agent polyisocyanate to the water-based acrylic resin while stirring, and mix evenly to obtain paint;

[0037] (3) Apply the paint on the surface of the product;

[0038] (4) Send the coated product into a drying oven at 70° C. for curing.

[0039] The paint has strong adhesion, plump appearance, smooth and smooth paint film, good toughness, high scratch resistance and good stability.

Embodiment 2

[0041] Add a small amount of leveling agent, defoamer and catalyst in step (2) of Example 1, and the rest are the same as in Example 1.

[0042] The coating effect is basically the same as that of Example 1, but due to the addition of corresponding auxiliary agents, the reaction speed is faster.

Embodiment 3

[0044] Change the content of some components in Example 1 to: water-based acrylic resin: 50 parts; curing agent polyisocyanate: 30 parts; nano calcium carbonate: 25 parts; water-based polyurethane: 20 parts; reactive silicone: 5 parts; 3 parts of solvent isopropyl alcohol; All the other are the same as the method of embodiment 1.

[0045] The coating has strong adhesion, the appearance of the paint film is plump, smooth and smooth, and the hardness is particularly prominent, with good stability. It is suitable for products that require high hardness.

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PUM

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Abstract

The invention discloses a scratch resistance waterborne polyurethane coating. The scratch resistance waterborne polyurethane coating comprises the following raw materials in percentage by weight: 20-50 of waterborne acrylic acid resin, 10-30 of curing agent, 10-25 of nanometer calcium carbonate, 20-50 of waterborne polyurethane, 1-5 of reactive organic silicon and 1-3 of cosolvent. Correspondingly, the invention also discloses a preparation method of the scratch resistance waterborne polyurethane coating. According to the preparation method, the scratch resistance waterborne polyurethane coating is prepared by uniformly mixing the waterborne acrylic acid resin, the nanometer calcium carbonate, the waterborne polyurethane, an organic silicon solution and the curing agent. After the coating prepared by the method is cured, a coating film formed on the surface of a base material has scratch resistance and good extensibility and lubricative appearance; and simultaneously, a proportion of the hardness to toughness of the coating can be adjusted according to different applications of the coating; and the scratch resistance waterborne polyurethane coating has wide range of application and is low in cost.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a scratch-resistant water-based polyurethane coating and a preparation method thereof. Background technique [0002] The coating film on the surface of automobiles, furniture and other objects is easily damaged by sand, stones, washing or artificial scratches during use, resulting in weakened gloss and obvious scratches, which seriously affect the quality and appearance of the coating film. Therefore, scratch resistance has become a measure of coating quality. An important indicator of membrane performance. High scratch resistance means that the coating film can keep the surface of the material shiny and beautiful for a long time, so that the service life of the decorative material is longer. [0003] At present, to improve the scratch resistance, generally, resins with higher hardness are selected to increase the hardness of the coating film, or nano-inorganic particles are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12
Inventor 吴启超丰俊湘任少东
Owner ANHUI TIANAN NEW MATERIAL CO LTD
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