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High-gloss varnish, preparation method and application thereof

A clear topcoat and high-gloss technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of affecting the sound of musical instruments, brittle adhesion of paint films, and easy pinholes, etc., to improve fullness and high adhesion , the effect of reducing the amount of paint

Active Publication Date: 2021-03-30
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 conventional PU bright clear topcoat is soft, which will affect the timbre of musical instruments, and the polishing performance is poor. It is easy to cause prickly heat when thickly applied in high tem

Method used

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  • High-gloss varnish, preparation method and application thereof
  • High-gloss varnish, preparation method and application thereof
  • High-gloss varnish, preparation method and application thereof

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) Add a certain amount of absolute ethanol solution to the crude product, precipitate, filter with suction, and finally place the product 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 0.1 g 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 groups of treatment groups, marked as treatment 1, treatment 2, treatment 3, treatment 4 and treatment 5 respectively, prepare the aliphatic polyurethane of mercapto-terminated modification, 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 0.15 g 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] Ste...

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] Adopt the leveling agent component A~F of this embodiment to replace the leveling agent component in the formula 1-3 of embodiment 1 respectively, prepare high-gloss clear topcoat. In addition to the leveling agent components, th...

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Abstract

The invention provides a high-gloss varnish, which comprises the following components in percentage by mass: 40-46% of unsaturated polyester resin, 40-46% of fatty acid resin, 0.2-0.4% of a dispersingagent component, 0.5-1% of a thickener component, 0.2-0.8% of a leveling agent component, 0.2-0.5% of a conductive agent component, 0.2-0.4% of an antifoaming agent component and 8-13% of a diluent component. A paint film formed by the high-gloss varnish provided by the invention has excellent properties of high hardness, high fullness, high gloss, high adhesive force and high wear resistance, has good drying property even under a low-temperature condition, and is not easy to generate blister protrusion even under a high-temperature condition, so that the varnish has higher smoothness duringconstruction, and the formed paint film has favorable 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 musical instruments in industry. 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 conventional PU bright clear topcoat is ...

Claims

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Application Information

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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
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