High-gloss self-curing epoxy resin as well as preparation method and application thereof

An epoxy resin, self-curing technology, applied in the field of powder coatings, can solve the problems of low product gloss, poor batch stability of powder coatings, poor curing impact performance, etc., achieve high gloss of coating film, solve gloss and leveling The performance is not ideal, the effect of high leveling level

Pending Publication Date: 2021-12-24
黄山新佳精细材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because some manufacturers use single-screw extruders, the effect of melt mixing is seriously insufficient, and the stability of the prepared powder coating batches is often poor due to insufficient miscibility of the two, such as the gloss of the product is not high, curing Poor impact performance and other issues
Even if a twin-screw extruder with better miscibility is used, it will be difficult to obtain a high-gloss and high-leveling coating film due to the lack of compatibility between the polyester resin and epoxy resin produced in each batch

Method used

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  • High-gloss self-curing epoxy resin as well as preparation method and application thereof
  • High-gloss self-curing epoxy resin as well as preparation method and application thereof
  • High-gloss self-curing epoxy resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The high-gloss self-curing epoxy resin described in this embodiment, its preparation raw material comprises the component of following molar weight:

[0028]

[0029] Sodium tungstate: benzyltrimethylammonium chloride = 1:0.2, accounting for 0.2wt% of the mass of bisphenol F.

[0030] The preparation method of high-gloss self-curing epoxy resin described in the present embodiment may further comprise the steps:

[0031] (1) Take the bisphenol F, allyl glycidyl ether, E-51, xylene and ring-opening polymerization catalyst in the formula amount and add them to the reactor, start stirring, gradually heat up to 90°C, and then carry out the heat preservation reaction;

[0032] (2) With the amount of free bisphenol F in the liquid chromatography detection system, when the amount of free bisphenol F in the system is lower than 1%, add the described maleic anhydride and pentaerythritol of formula amount in the reactor at this moment Tetraglycidyl ether, heated up to 110°C fo...

Embodiment 2

[0039] The high-gloss self-curing epoxy resin described in this embodiment, its preparation raw material comprises the component of following molar weight:

[0040]

[0041] Sodium tungstate: benzyltrimethylammonium chloride = 1:0.4, accounting for 0.5 wt% of the mass of bisphenol F.

[0042] The preparation method of high-gloss self-curing epoxy resin described in the present embodiment may further comprise the steps:

[0043] (1) Take the bisphenol F, allyl glycidyl ether, E-51, xylene and ring-opening polymerization catalyst in the formula amount and add them into the reaction kettle, start stirring, gradually heat up to 95°C, and then carry out the heat preservation reaction;

[0044] (2) With the amount of free bisphenol F in the liquid chromatography detection system, when the amount of free bisphenol F in the system is lower than 1%, add the described maleic anhydride and pentaerythritol of formula amount in the reactor at this moment Tetraglycidyl ether, heat up to...

Embodiment 3

[0051] The high-gloss self-curing epoxy resin described in this embodiment, its preparation raw material comprises the component of following molar weight:

[0052]

[0053] Sodium tungstate: benzyltrimethylammonium chloride = 1:0.3, accounting for 0.4wt% of the mass of bisphenol F.

[0054] The preparation method of high-gloss self-curing epoxy resin described in the present embodiment may further comprise the steps:

[0055] (1) Take the bisphenol F, allyl glycidyl ether, E-51, xylene and ring-opening polymerization catalyst in the formula amount and add them into the reaction kettle, start stirring, gradually heat up to 92°C, and then carry out the heat preservation reaction;

[0056] (2) With the amount of free bisphenol F in the liquid chromatography detection system, when the amount of free bisphenol F in the system is lower than 1%, add the described maleic anhydride and pentaerythritol of formula amount in the reactor at this moment Tetraglycidyl ether, heated up t...

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Abstract

The invention belongs to the technical field of powder coatings, and particularly relates to high-gloss self-curing epoxy resin as well as a preparation method and application thereof. According to the high-gloss self-curing epoxy resin disclosed by the invention, bisphenol F, allyl glycidyl ether, E-51, isophthalic acid, maleic anhydride, pentaerythritol tetraglycidyl ether, adipic acid and xylene are subjected to a reaction, and then the reaction product and hydrogen peroxide are subjected to oxidation, so that the self-curing epoxy resin with carboxyl groups and epoxy groups is obtained. According to the epoxy resin material, the acid value is 33-40 mgKOH / g, the epoxy equivalent is 1400-1500 g / mol, the epoxy resin material has epoxy and carboxyl groups, and the softening point of the resin is low; and the carboxyl and the epoxy are uniformly dispersed in the molecular structure, so that the curing rate of the product is uniform, the leveling level is high, and the gloss is excellent.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to a high-gloss self-curing epoxy resin and its preparation method and application. 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 gradually replacing organic solvent-based coatings and has become an important development direction in the coatings i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C09D163/02C09D163/00C09D5/03
CPCC08G59/1405C08G59/1438C08G59/145C09D163/00C09D5/03C08L2205/025C08L63/00
Inventor 余金煌余筱栋
Owner 黄山新佳精细材料有限公司
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