High-leveling 50:50 polyester resin for MDF materials, as well as preparation method and application thereof

A polyester resin and leveling technology, used in polyester coatings, epoxy resin coatings, coatings, etc., can solve the problems of insufficient segment flexibility, poor surface leveling performance and high activity of powder coatings, and meet the needs of The effect of coating effect requirements, long gel time and low melt viscosity

Active Publication Date: 2019-06-28
黄山市向荣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to provide a kind of high leveling 50:50 polyester resin for MDF material, through two processes of mid-infrared pre-curing and low-temperature thermal curing, to solve the problem of 50:50 for MDF material in the prior art: Insufficient chain segment flexibility and high activity of 50 polyester resin lead to poor surface leveling performance of the prepared powder coating;

Method used

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  • High-leveling 50:50 polyester resin for MDF materials, as well as preparation method and application thereof
  • High-leveling 50:50 polyester resin for MDF materials, as well as preparation method and application thereof
  • High-leveling 50:50 polyester resin for MDF materials, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The high-leveling 50:50 polyester resin used for MDF material in this embodiment, based on the total amount of raw materials prepared by the polyester resin, includes the following raw material components in mole percentages:

[0028]

[0029] The preparation method of the high-leveling 50:50 polyester resin for MDF material in this embodiment includes the following steps:

[0030] (1) Take the polypropylene glycol diglycidyl ether and neopentyl glycol in the formula amount into the reaction kettle, and control the temperature to be lower than 140°C for heating and melting, and stir well;

[0031] (2) Add the formula amount of the isophthalic acid and the brasilic acid to the above mixture material, and add the formula amount of the catalyst at the same time, and gradually raise the temperature to 190°C at a temperature increase rate of 10°C / h for the heat preservation reaction 2- 4h, until the acid value of the reactant is less than 80mgKOH / g;

[0032] (3) Continue to add form...

Embodiment 2

[0037] The high-leveling 50:50 polyester resin used for MDF material in this embodiment, based on the total amount of raw materials prepared by the polyester resin, includes the following raw material components in mole percentages:

[0038]

[0039]

[0040] The preparation method of the high-leveling 50:50 polyester resin for MDF material in this embodiment includes the following steps:

[0041] (1) Take the polypropylene glycol diglycidyl ether and neopentyl glycol in the formula amount into the reaction kettle, and control the temperature to be lower than 140°C for heating and melting, and stir well;

[0042] (2) Add the formula amount of the isophthalic acid and the brasilic acid to the above mixture material, and add the formula amount of the catalyst at the same time, and gradually increase the temperature to 210°C at a temperature increase rate of 10°C / h for the heat preservation reaction 2- 4h, until the acid value of the reactant is less than 80mgKOH / g;

[0043] (3) Continue...

Embodiment 3

[0048] The high-leveling 50:50 polyester resin used for MDF material in this embodiment, based on the total amount of raw materials prepared by the polyester resin, includes the following raw material components in mole percentages:

[0049]

[0050] The preparation method of the high-leveling 50:50 polyester resin for MDF material in this embodiment includes the following steps:

[0051] (1) Take the polypropylene glycol diglycidyl ether and neopentyl glycol in the formula amount into the reaction kettle, and control the temperature to be lower than 140°C for heating and melting, and stir well;

[0052] (2) Add the formula amount of the isophthalic acid and the brasilic acid to the above mixture material, and add the formula amount of the catalyst at the same time, and gradually raise the temperature to 200°C at a temperature increase rate of 10°C / h for the heat preservation reaction 2- 4h, until the acid value of the reactant is less than 80mgKOH / g;

[0053] (3) Continue to add form...

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Abstract

The invention belongs to the technical field of powder coating, and particularly relates to high-leveling 50:50 polyester resin for MDF materials, and further discloses a preparation method and application in preparation of indoor powder coating with excellent surface leveling performance thereof. The polyester resin is prepared by polymerizing the following raw materials: meta-phthalic acid, brassylic acid, hexanedioic acid, polypropylene glycol diglycidyl ether, neopentyl glycol, 2-hydroxy-5-methyl benzenedimethanol, glyceryl monooleate and 2,3-pyrazine dihydride, has flexible chain segment,has good molten-state flowing property and relatively low adhesion at 130 DEG C and has long gelling time due to relatively low terminal carboxyl group activity, so that enough leveling time before curing is ensured, and the coating with excellent surface leveling for MDF materials can be finally obtained.

Description

Technical field [0001] The invention belongs to the technical field of powder coatings, and specifically relates to a high-leveling 50:50 polyester resin for MDF materials, and further discloses a preparation method thereof and its use for preparing powder coatings for MDF materials with excellent surface leveling performance. Background technique [0002] Powder coating is a 100% solid powder that does not contain organic solvents. It is different from oil-based coatings and water-based coatings. It does not use solvent or water as the dispersion medium when painting, but uses air as the dispersion medium to uniformly coat the workpiece. The surface is heated to form a new type of environmentally friendly paint with a special-purpose coating film. Powder coating has the advantages of no VOC, environmental protection, energy saving, high construction efficiency and wide application range. With its economic, environmental protection, high efficiency and excellent performance, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C09D167/02C09D163/00C09D5/03
Inventor 郑荣辉江蓉毕海鹏张齐冯小浩
Owner 黄山市向荣新材料有限公司
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