Preparation method of low-viscosity epoxy resin and ultra-leveling powder coating

A technology of epoxy resin and powder coating, applied in the field of coatings, can solve the problems that the leveling and gloss of the coating film are difficult to compare with paints, and the viscosity of the resin is high, so as to achieve excellent leveling, improve performance, and improve leveling and gloss Effect

Inactive Publication Date: 2019-04-16
TIANJIN XIANGSHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of the resin used in powder coatings, the leveling and gloss of the formed coating film are difficult to match with paints, which limits the application of many industries that require high decorative performance.

Method used

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  • Preparation method of low-viscosity epoxy resin and ultra-leveling powder coating
  • Preparation method of low-viscosity epoxy resin and ultra-leveling powder coating
  • Preparation method of low-viscosity epoxy resin and ultra-leveling powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of low-viscosity epoxy resin, the steps are as follows:

[0028] Add 160 parts by weight of liquid epoxy resin into the three-necked flask, heat up to 120-130°C while stirring mechanically, add 72 parts by weight of bisphenol A, and control the temperature at 130 °C after the epoxy resin and bisphenol A are completely miscible. ±2°C, add quaternary ammonium salt catalyst, react at 150-160°C for 3 hours, pour the reaction product out of a three-necked flask, and cool to obtain a low-viscosity epoxy resin.

[0029] Utilize the super-leveling powder coating of the low-viscosity epoxy resin that the preparation method of above-mentioned low-viscosity epoxy resin makes, its composition and parts by weight are as follows:

[0030]

Embodiment 2

[0032] A preparation method of low-viscosity epoxy resin, the steps are as follows:

[0033] Add 170 parts by weight of liquid epoxy resin into the three-necked flask, heat up to 120-130°C while stirring mechanically, add 80 parts by weight of bisphenol A, and control the temperature at 130 °C after the epoxy resin and bisphenol A are completely miscible. ±2°C, add quaternary ammonium salt catalyst, react at 150-160°C for 2.5 hours, pour the reaction product out of a three-necked flask, cool down, and obtain a low-viscosity epoxy resin.

[0034] Preferably, the liquid epoxy resin is bisphenol F epoxy resin, epoxy equivalent (160-180) g / eq, viscosity (700-1200) cps@25°C.

[0035] Utilize the super-leveling powder coating that the preparation method of above-mentioned low-viscosity epoxy resin makes, its composition and parts by weight are as follows:

[0036]

[0037] Preferably, the polyester resin is a carboxyl-terminated polyester resin with an acid value of 47-51 mgKOH / ...

Embodiment 3

[0041] A preparation method of low-viscosity epoxy resin, the steps are as follows:

[0042] Add 165 parts by weight of liquid epoxy resin into the three-necked flask, heat up to 120-130°C while stirring mechanically, add 83 parts by weight of bisphenol A, and control the temperature at 130 °C after the epoxy resin and bisphenol A are completely miscible. Add a quaternary ammonium salt catalyst at ±2°C, react at 150-160°C for 2.5 hours, pour the reaction product out of a three-necked flask, and cool to obtain a low-viscosity epoxy resin.

[0043] Preferably, the liquid epoxy resin is bisphenol F epoxy resin, epoxy equivalent (160-180) g / eq, viscosity (700-1200) cps@25°C.

[0044] Preferably, the quaternary ammonium salt catalyst is added in parts by weight of 0.07-0.2 parts;

[0045] The number-average relative molecular mass of the low-viscosity epoxy resin is 2500-4500, and the epoxy equivalent is (780-950) g / eq.

[0046] Utilize the super-leveling powder coating that the ...

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Abstract

The invention relates to a preparation method of low-viscosity epoxy resin, which comprises the following steps of: adding 150-180 parts by weight of liquid epoxy resin, heating to 120-130 DEG C whilemechanically stirring, adding 65-90 parts by weight of bisphenol A, after the epoxy resin and the bisphenol A are completely mixed and dissolved, adding quaternary ammonium salt catalyst at 130+ / -2 DEG C, reacting at 150-160 DEG C for 2-3 hours, pouring out a reaction product, and cooling to obtain the low-viscosity epoxy resin. The low-viscosity epoxy resin prepared by the method can obviously improve the leveling property, the glossiness and the fullness of powder coating, and has strong decorative performance and practical value. By the adoption of the preparation method of the low-viscosity epoxy resin, a production process is simple, the three wastes are not generated, an environmental protection requirement of the country is met, and the industrialization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to super-leveling powder coatings, in particular to a preparation method of low-viscosity epoxy resin and super-leveling powder coatings. Background technique [0002] As people and policies attach importance to environmental protection, the traditional oil-based coating industry is increasingly turning to more environmentally friendly powder coatings. Powder coating is a powder coating with 100% solid content, which does not contain solvents and toxic and volatile substances. It is an energy-saving and environmentally friendly coating with excellent performance. The formed coating has good compactness, adhesion, impact strength and toughness. However, due to the high viscosity of the resin used in powder coatings, the leveling and gloss of the formed coating film are difficult to match with paints, which limits the application of many industries that require high decorative perform...

Claims

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Application Information

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IPC IPC(8): C08G59/62C09D163/00C09D167/00C09D5/03C09D7/61
CPCC08G59/621C09D5/03C09D5/033C09D163/00C08L67/00C08K3/22C08K3/30C08K3/013
Inventor 张海瑞孙彬丁树国徐煜慧赵金祥
Owner TIANJIN XIANGSHENG NEW MATERIALS CO LTD
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