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High-solid amino resin for synthetic coating and preparation method thereof

An amino resin, high solid content technology, applied in the direction of coating, can solve the problems of complex preparation process, high baking temperature and low gloss of paint film

Pending Publication Date: 2021-02-12
三棵树(上海)新材料研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation process of the existing methyl etherified amino resin is complicated, and the dehydration operation will generate a large amount of waste water, and the baking temperature of the paint made using the methyl etherified amino resin is high, and the gloss of the paint film is low

Method used

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  • High-solid amino resin for synthetic coating and preparation method thereof
  • High-solid amino resin for synthetic coating and preparation method thereof
  • High-solid amino resin for synthetic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of high-solid amino-containing resin for synthetic paint, method comprises the following steps:

[0023] ①Mix the alcoholic organic solvent and paraformaldehyde evenly, then raise the temperature to 70°C and keep it warm for 1 hour to obtain a transparent formaldehyde-polyol solution;

[0024] ②Then add melamine to the formaldehyde-polyol solution prepared in step ①, then raise the temperature to 90°C and keep it warm for 30min (carry out the methylolation reaction of melamine);

[0025] ③Then lower the temperature to 50°C, then add the modifier and catalyst, and keep the temperature at 50°C for 50 minutes to obtain the high-solid amino-containing resin for synthetic coatings.

Embodiment 2

[0027] A kind of preparation method of high-solid amino-containing resin for synthetic paint, method comprises the following steps:

[0028] ①Mix the alcoholic organic solvent and paraformaldehyde evenly, then raise the temperature to 80°C and keep it warm for 0.5h to prepare a transparent formaldehyde-polyol solution;

[0029] ②Then add melamine to the formaldehyde-polyol solution prepared in step ①, then raise the temperature to 100°C and keep it warm for 15min (carry out the methylolation reaction of melamine);

[0030] ③Then lower the temperature to 60°C, then add modifier and catalyst, and keep warm at 60°C for 30 minutes to obtain high-solid amino resin for synthetic coatings.

Embodiment 3

[0032] A kind of preparation method of high-solid amino-containing resin for synthetic paint, method comprises the following steps:

[0033] ①Mix the alcoholic organic solvent and paraformaldehyde evenly, then raise the temperature to 75°C and keep it warm for 0.8h to prepare a transparent formaldehyde-polyol solution;

[0034] ②Then add melamine to the formaldehyde-polyol solution prepared in step ①, then heat up to 95°C and keep it warm for 28min (carry out the methylolation reaction of melamine);

[0035] ③Then lower the temperature to 55°C, then add the modifier and catalyst, and keep the temperature at 55°C for 40 minutes to obtain the high-solid amino-containing resin for synthetic coatings.

[0036] The mass percent of each component of table 1 embodiment 1-3

[0037]

[0038] Compared with the conventional methanol-etherified amino resin for the high-solid amino resin for synthetic coatings, the specific parameters of product quality are shown in Table 2.

[0039]...

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Abstract

The invention relates to high-solid amino resin for a synthetic coating and a preparation method of the high-solid amino resin. The high-solid amino resin for the synthetic coating is mainly preparedfrom the following substances, by mass: 30-40 parts of paraformaldehyde, 15-25 parts of melamine, 25-30 parts of a modifier, 0.60-0.65 part of a catalyst and 16-19 parts of an alcohol organic solvent.Compared with common methylated amino resin, the high-solid amino resin for the coating is simple in synthesis process, free of purification steps, free of wastewater discharge, low in viscosity, lowin paint preparation baking temperature (110 DEG C) and high in gloss (larger than or equal to 100 Gu, 60 DEG C) of a paint film formed after crosslinking; the baking temperature of conventional methylated amino resin is 160 DEG C, and the gloss of a paint film is more than or equal to 90Gu and 60 degrees.

Description

technical field [0001] The invention relates to a high-solid amino resin for synthetic coatings and a preparation method thereof. Background technique [0002] With the urgent need for the rapid development of special coatings, special amino resins have gradually penetrated into all aspects of the coatings industry, making the performance of special coatings significantly improved and improved. Such as electrophoretic coatings, high-grade decorative coatings, high-temperature coatings, coil coatings, water-based fire-resistant coatings, automotive-specific primers and special anti-corrosion coatings, etc., achieve ideal functions due to the introduction of amino resins. There is every reason to believe that with the development of the coatings industry, the output of amino resins will increase substantially, and the quality will increase significantly. The application of amino resins in special coatings has considerable prospects. [0003] Amino resin is a multi-functional ...

Claims

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Application Information

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IPC IPC(8): C08G12/42C09D161/32
CPCC08G12/428C09D161/32
Inventor 朱恒付绍祥
Owner 三棵树(上海)新材料研究有限公司
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