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Flame-retardant type polyester resin as well as preparation method and powder coating with same

A technology of polyester resin and powder coating, applied in the field of its preparation, powder coating and flame retardant polyester resin, can solve the problems of easy combustion, hidden danger, no flame retardant performance, etc., and achieve excellent flame retardant performance. Flame retardant performance, excellent curing effect

Active Publication Date: 2017-08-22
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

[0004] Traditional powder coatings basically do not have flame retardant properties, and if they are used on MDF boards, there will be great safety hazards
Because a large part of the transparent powder coating for MDF is used indoors, while maintaining the beauty and decoration of the wood grain itself, because it does not contain fillers and pigments, and the substrate is wood, it is easy to burn and has a large safety hazard.

Method used

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  • Flame-retardant type polyester resin as well as preparation method and powder coating with same
  • Flame-retardant type polyester resin as well as preparation method and powder coating with same
  • Flame-retardant type polyester resin as well as preparation method and powder coating with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of flame-retardant polyester resin, its raw material composition and molar ratio are: 2-bromo-2-nitro-1,3-propanediol 4.8mol, neopentyl glycol 1.5mol, trimethylol melamine 1.2mol, 0.5 mol of trishydroxymethyl phosphorus oxide, 5.0 mol of pyromellitic acid diamide, 2.5 mol of tetrabromoterephthalic acid, 1.2 mol of trimellitic anhydride, and 10760.05 mol of antioxidant.

[0054] The preparation method of above-mentioned polyester resin comprises the following steps:

[0055] A. Add the formulated amount of 2-bromo-2-nitro-1,3-propanediol, trimethylol melamine, neopentyl glycol, and trimethylol phosphorus oxide into the mixer, and heat and melt below 140°C ;

[0056] B. Add the formula amount of pyromellitic acid diamide and tetrabromoterephthalic acid to the above mixed polyol, and at the same time add 0.1-0.2% of the total mass of the material as phosphotungstic acid as a catalyst, and gradually raise the temperature under the protection of nitrogen React until...

Embodiment 2

[0061] Same as Example 1, except that the composition of raw materials is as follows: 2.0 mol of 2-bromo-2-nitro-1,3-propanediol, 1.0 mol of neopentyl glycol, 1.0 mol of trimethylol melamine, 0.5 mol of trimethylol phosphine oxide mol, pyromellitic acid diamide 3.5mol, tetrabromoterephthalic acid 1.0mol, trimellitic anhydride 1.0mol, antioxidant 10760.01mol.

[0062] The prepared low-temperature curing polyester resin for powder coatings has an acid value of 45 mgKOH / g, a glass transition temperature (Tg) of 43° C., and a softening point of 94° C.

Embodiment 3

[0064] Same as Example 1, except that the composition of raw materials is as follows: 3.0 mol of 2-bromo-2-nitro-1,3-propanediol, 1.5 mol of neopentyl glycol, 0.5 mol of trimethylol melamine, 0.2 mol of trimethylol phosphine oxide mol, pyromellitic acid diamide 2.0mol, tetrabromoterephthalic acid 2.3mol, trimellitic anhydride 0.5mol, antioxidant 10760.03mol.

[0065] The prepared low-temperature-curable polyester resin for powder coatings has an acid value of 55 mgKOH / g, a glass transition temperature (Tg) of 52°C, and a softening point of 104°C.

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Abstract

The invention discloses a flame-retardant type polyester resin as well as a preparation method and a powder coating with the same. The flame-retardant type polyester resin is prepared from the following main raw materials: 2-bromine-2-nitro-1,3-propylene glycol, neopentyl glycol, trihydroxymethyl melamine, trisphosphine oxide, tris(hydroxymethyl) phosphine oxide, tetrabromoterephthalic acid, pyromellitic acid diamide and an end-capping reagent. The finally obtained flame-retardant type polyester resin disclosed by the invention is relatively high in activity, can be cured at 120 DEG C, is applicable to medium density fiber plates, and is excellent in wood quality and excellent in curing filming property. In addition, polyester chain segments comprise flame-retardant elements, namely bromine, nitrogen and phosphorus of relatively high contents, so that excellent flame retardancy can be achieved, and the oxygen indexes can be up to 30 or greater.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a flame-retardant polyester resin, a preparation method thereof and a powder coating containing the same. Background technique [0002] Polyester resin is the raw material for the manufacture of polyester fibers, coatings, films and engineering plastics, and is usually prepared from dibasic acids and diols through esterification and polycondensation reactions. A common feature of this type of polymer structure is that the chains of its macromolecules are connected by ester groups, so they are commonly called polyesters. Polyester has the advantages of bright, plump, high hardness, good physical and mechanical properties, chemical corrosion resistance, adhesion, impact resistance and wear resistance. With the development of science and technology, more and more saturated polyester resin products are used in high-performance fields. [0003] Among them, polyester res...

Claims

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Application Information

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IPC IPC(8): C08G63/692C08G63/685C08G63/682C09D167/02C09D163/00C09D5/03C09D5/18C09D7/12C09D7/06
CPCC08G63/6826C08G63/6856C08G63/6926C08L2201/02C09D5/033C09D5/18C09D167/02C08L63/00
Inventor 郑荣辉鲍观良冯小浩张齐毕海鹏
Owner 黄山市向荣新材料有限公司
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