A kind of high leveling 50:50 polyester resin for MDF material and its preparation method and application

A polyester resin, leveling technology, applied in the direction of polyester coatings, epoxy resin coatings, powder coatings, etc., can solve the problems of insufficient chain segment flexibility, poor surface leveling performance of powder coatings, high activity, etc.

Active Publication Date: 2021-06-15
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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  • A kind of high leveling 50:50 polyester resin for MDF material and its preparation method and application
  • A kind of high leveling 50:50 polyester resin for MDF material and its preparation method and application
  • A kind of high leveling 50:50 polyester resin for MDF material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0027] The MDF material described in this embodiment uses a high leveling 50:50 polyester resin, based on the total amount of raw materials for the preparation of the polyester resin, it includes the following raw material components in molar percentages:

[0028]

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

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

[0031] (2) Add the said isophthalic acid and brazil acid of formula quantity in above-mentioned mixed material, add the described catalyst of formula quantity simultaneously, and gradually warm up to 190 DEG C with the heating rate of 10 DEG C / h and carry out insulation reaction 2- 4h, until the acid value of the reactant is less than 80...

Embodiment 2

[0037] The MDF material described in this embodiment uses a high leveling 50:50 polyester resin, based on the total amount of raw materials for the preparation of the polyester resin, it includes the following raw material components in molar percentages:

[0038]

[0039]

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

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

[0042] (2) Add the said isophthalic acid and brassyl acid of formula quantity in above-mentioned mixed material, add the described catalyst of formula quantity simultaneously, and gradually warm up to 210 DEG C with the heating rate of 10 DEG C / h and carry out insulation reaction 2- 4h, until the acid value of the reactant is...

Embodiment 3

[0048] The MDF material described in this embodiment uses a high leveling 50:50 polyester resin, based on the total amount of raw materials for the preparation of the polyester resin, it includes the following raw material components in molar percentages:

[0049]

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

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

[0052] (2) Add the said isophthalic acid and brazillic acid of formula quantity in above-mentioned mixed material, add the described catalyst of formula quantity simultaneously, and gradually warm up to 200 DEG C with the heating rate of 10 DEG C / h and carry out insulation reaction 2- 4h, until the acid value of the reactant is less than...

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Abstract

The invention belongs to the technical field of powder coatings, in particular to a high-leveling 50:50 polyester resin for MDF materials, and further discloses its preparation method and its use for preparing indoor powder coatings with excellent surface leveling properties. The MDF material of the present invention uses high leveling property 50:50 polyester resin with isophthalic acid, brazil acid, adipic acid, polypropylene glycol diglycidyl ether, neopentyl glycol, 2-hydroxy-5-methyl m-benzene It is obtained by polymerization of dimethanol, glycerol monooleate and 2,3-pyrazine dianhydride as raw materials. The obtained polyester resin has soft chain segments, good fluidity in molten state at 130°C, low viscosity itself, and polymer The activity of the terminal carboxyl group of the ester resin product is low, resulting in a long gelation time, which ensures sufficient leveling time before curing, and finally obtains a coating with excellent surface leveling for MDF materials.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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