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A kind of high-gloss varnish and its preparation method and application

A clear finish and high-gloss technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as affecting the sound of musical instruments, brittle adhesion of paint films, and poor polishing

Active Publication Date: 2022-04-15
GUANGDONG MAYDOS BUILDING MATERIALS LTD CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness of the conventional PU bright clear topcoat is soft, which will affect the timbre of the musical instrument, and the polishing is poor. It is easy to get prickly heat when thickly applied in a high temperature environment, while the PE bright clear topcoat has no effect on the board surface under low temperature conditions. Good, easy to produce pinholes, and the paint film is too brittle and has poor adhesion

Method used

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  • A kind of high-gloss varnish and its preparation method and application
  • A kind of high-gloss varnish and its preparation method and application
  • A kind of high-gloss varnish and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of unsaturated resin

[0023] (1) Add 25g of dipentadiene petroleum resin (DCPD) and 95mL of n-heptane into a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, start stirring, adjust the temperature, dissolve the petroleum resin, and heat up to 85 0.75 g of azobisisobutyronitrile (AIBN) was added, and 28 mL of glycidyl methacrylate was slowly added dropwise. After the reaction was completed, a crude product was obtained.

[0024] (2) The crude product was added to a certain amount of absolute ethanol solution, precipitated, filtered with suction, and finally placed in a drying oven at 60° C. to dry to constant weight to obtain acrylated DCPD.

[0025] 2. Preparation of Fatty Acid Resin

[0026] Step 1: Add 21.11g of polyether diol and 19.03g of isophorone diisocyanate in a four-necked flask equipped with a mechanical stirrer, a thermometer and a reflux condenser, stir evenly, and then add 0.1g of tributyl tin hydride;

...

Embodiment 2

[0054] 1. Preparation of Aliphatic Polyurethane

[0055] 1.1 How to set up treatment groups

[0056] Set up 5 treatment groups, marked as treatment 1, treatment 2, treatment 3, treatment 4 and treatment 5, to prepare thiol-terminated modified aliphatic polyurethane, and the operation method of each treatment group is as follows.

[0057] (1) Processing 1

[0058] Step 1: Add 21.11g of polyether glycol and 19.03g of isophorone diisocyanate in a four-necked flask equipped with a mechanical stirrer, a thermometer and a reflux condenser, stir evenly, then add 0.15g of dilauric acid therein Dibutyltin;

[0059] Step 2: heating the mixed solution obtained in the step 1 to 70°C and keeping it warm for 5 hours;

[0060] Step 3: Add dimethylolpropionic acid (3.02g) / N-methylpyrrolidone (7g) solution to the mixed solution treated in step 2, so that the temperature of the resulting mixed solution is maintained at 70°C and kept for 5 hours ;

[0061] Step 4: Add 28.31 g of trimethylol...

Embodiment 3

[0099] 1. Explore the experiment setting method

[0100] This example is based on the performance test results of Example 1, using the formula 1-3 in Example 1 as the basic formula, changing the composition of the leveling agent component in the formula, and exploring the physical and chemical effects of the leveling agent component on the high-gloss clear topcoat performance impact. Prepare the test leveling agent component of this embodiment according to the component composition shown in table 4, and use the leveling agent component adopted in formula 1-3 in embodiment 1 as the contrast leveling agent of this embodiment components.

[0101] Table 4 The test leveling agent component composition of this embodiment (mass parts)

[0102]

[0103] The tested leveling agent components A to F of this example were used to replace the leveling agent components in the formulation 1-3 of Example 1 to prepare a high-gloss clear topcoat. In addition to the leveling agent component...

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Abstract

The invention provides a high-gloss clear finish paint, which comprises the following components according to mass percentage: 40-46% of unsaturated resin, 40-46% of fatty acid resin, 0.2-0.4% of dispersant component, and 0.5% of thickener component ~1%, leveling agent component 0.2~0.8%, conductive agent component 0.2~0.5%, defoamer component 0.2~0.4%, diluent component 8~13%. The paint film formed by the high-gloss clear topcoat provided by the present invention has excellent properties of high hardness, high fullness, high gloss, high adhesion and high wear resistance, and has good drying properties even under low temperature conditions , Even under high temperature conditions, it is not easy to cause prickly heat, so that the clear topcoat has a high degree of smoothness during construction and the formed paint film has a good appearance.

Description

technical field [0001] The invention belongs to the field of chemical coatings, and in particular relates to a high-gloss clear topcoat and its preparation method and application. Background technique [0002] With the development of social life, people's pursuit of the quality of musical instruments is getting higher and higher. Spraying is an important link in the production of industrial musical instruments. It can improve the corrosion resistance, wear resistance, hardness and aesthetics of musical instruments, and can protect Long-term use of musical instruments enables long-term collection of musical instruments. In recent years, musical instruments such as guitars have been developing towards high-grade, especially the glossy clear topcoat coated on the surface of musical instruments, not only requires good transparency, high brightness, high fullness and hardness enough to meet customer requirements. However, the hardness of the conventional PU bright clear topcoat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D151/00C09D7/43C09D7/47C09D7/20
CPCC09D175/08C09D151/003C09D7/43C09D7/47C09D7/20C08L2205/02C08L2205/035C08L51/003C08L83/12C08L33/08C08L33/04C08K7/26C08L75/08
Inventor 符成珊周伟建符传杰符英苑范昌平
Owner GUANGDONG MAYDOS BUILDING MATERIALS LTD CO