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High-hydroxyl-value polyester resin for extinction type powder coating and preparation method and application thereof

A polyester resin, powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of easy agglomeration of finished powder coatings, affecting downstream applications, affecting the cost and downstream application potential of matte powder coatings, etc.

Active Publication Date: 2021-03-26
HUANGSHAN ZHENGJIE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But, because need to use the polyester resin (hydroxyl value 280-300mgKOH / g) of ultra-high hydroxyl value in this process method, because the hydroxyl content is too high, can cause its hygroscopicity too strong, the finished product powder coating of preparation is easy to store when storing. Agglomeration affects downstream applications; moreover, a large amount of B1530 curing agent is required to fully cure ultra-high hydroxyl polyester resin, and B1530 curing agent is almost all imported products at present, and the price is extremely high, which directly affects matting powder coatings. cost and potential for downstream applications

Method used

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  • High-hydroxyl-value polyester resin for extinction type powder coating and preparation method and application thereof
  • High-hydroxyl-value polyester resin for extinction type powder coating and preparation method and application thereof
  • High-hydroxyl-value polyester resin for extinction type powder coating and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]The extinction powder coating of the extinction powder coating is a high-hydroxyl resolved polyester resin which includes a component comprising a molar number:

[0029]

[0030]Silitone oxide whose amount is 0.08 mol% of the total mole amount of the preparation raw material;

[0031]Antioxidant 1010 has a total amount of 0.1 mol% of the preparative raw material.

[0032]The preparation method of the extinctable polyester resin of the extinction type powder coating, including the steps of:

[0033](1) The napultanediol and sorbitol of the acquisition are mixed, and the melt is heated at 130 ° C, and the formulation amount is added to the mixed material. Dicic acid, and catalyst, in the protective atmosphere, gradually warmed to 210 ° C under protective atmosphere to 210 ° C for insulation reaction, and the acid value is lowered to 122 mgKOH / g;

[0034](2) Continue to add the amount of 1,4-cyclohexane dimethanol to be mixed, gradually warp the polymerization at 6 ° C / h to 225 ° C, and the ac...

Embodiment 2

[0039]The extinction powder coating of the extinction powder coating is a high-hydroxyl resolved polyester resin which includes a component comprising a molar number:

[0040]

[0041]

[0042]Silitrous oxide whose amount is 0.2 mol% of the total mole of the preparation raw material;

[0043]Antioxidant 1010 has a total amount of 0.2 mol% of the preparation raw material.

[0044]The preparation method of the extinctable polyester resin of the extinction type powder coating, including the steps of:

[0045](1) The napultanediol and sorbitol of the acquisition are mixed, and the melt is heated below 130 ° C, and then the formulation amount is added to the mixed material, and the complexeniphenylene terephthalic acid, Adipic acid, and catalyst, in the protective atmosphere, gradually warmed to 205 ° C for thermal insulation at 10 ° C / h, and the acid value is lowered to 130 mgKOH / g;

[0046](2) Continue to add the amount of 1,4-cyclohexane dimethanol mixing, gradually warming up to 220 ° C at 8 ° C / h,...

Embodiment 3

[0051]The extinction powder coating of the extinction powder coating is a high-hydroxyl resolved polyester resin which includes a component comprising a molar number:

[0052]

[0053]Silitone oxide, which is used for the preparation of total molar amounts of total molar;

[0054]Antioxidant 1010 has a total amount of a total mole of a total mole of a total mole of the preparation raw material.

[0055]The preparation method of the extinctable polyester resin of the extinction type powder coating, including the steps of:

[0056](1) The napultanediol and sorbitol of the acquisition are mixed, and the melt is heated below 130 ° C, and then the formulation amount is added to the mixed material, and the complexeniphenylene terephthalic acid, Adipic acid, and catalyst, in the protective atmosphere, gradually warmed to 200 ° C under protective atmosphere, and the acid value is lowered to stop the reaction when the acid value is lowered to 148 mgKOH / g;

[0057](2) Continue to add the amount of 1,4-cycloh...

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Abstract

The invention belongs to the technical field of powder coating curing agents, particularly relates to high-hydroxyl-value polyester resin for an extinction type powder coating, and further discloses apreparation method and application of the high-hydroxyl-value polyester resin. The high-hydroxyl-value polyester resin for the extinction type powder coating is prepared from isophthalic acid, biphenyl dicarboxylic acid, adipic acid, neopentyl glycol, sorbitol, 1, 4-cyclohexanedimethanol, triglycidyl trimellitate and 12-hydroxy stearic acid as raw materials through polymerization. According to the polyester resin, by increasing the types and differences of active hydroxyl groups, the hydroxyl value of the polyester resin is reduced while the extinction effect of the polyester resin is not influenced, so that the defects of high hygroscopicity and high cost caused by a polyester resin product with an ultrahigh hydroxyl value are overcome, and the polyester resin has a relatively high application value.

Description

Technical field[0001]The present invention belongs to the field of powder coating curing agents, and more particularly to a high-resolvate polyester resin for extinction type powder coatings, and further discloses preparation methods and applications.Background technique[0002]The powder coating is a 100% solid powder that does not contain organic solvent. It is different from the oily coating and aqueous coating, and the coating does not use a solvent or water as a dispersion medium, but is electrically as a dispersion medium, evenly coated in the workpiece. The surface is heated to form a new type of environmentally friendly coating with a special application film after heating. Powder coatings have advantages such as solvent, no VOC, recyclable, environmental protection, energy saving, high construction efficiency, high coating machinery, etc., and is gradually replacing organic, environmentally friendly, efficient and excellent performance. Solventized coatings become an importan...

Claims

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Application Information

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IPC IPC(8): C08G63/60C08G63/78C09D5/03C09D167/00
CPCC08G63/60C08G63/78C09D5/03C09D167/00C08G2150/20
Inventor 江建明胡泽湘江兴科吴湧泉
Owner HUANGSHAN ZHENGJIE NEW MATERIALS
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