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Low-temperature-curable epoxy resin used for matting powder B68, and preparation method and application thereof

An epoxy resin, curing technology, applied in the field of powder coatings, can solve the problems of affecting product gloss, high curing energy consumption, high curing temperature, and achieve the effect of excellent matting effect, meeting effect requirements and high activity.

Active Publication Date: 2019-11-12
黄山五环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to provide a kind of epoxy resin for low-temperature curing type B68 matting powder, to solve the problem that the curing temperature of E-12 epoxy resin in the prior art is high and causes high curing energy consumption and affects the product. Gloss problems;

Method used

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  • Low-temperature-curable epoxy resin used for matting powder B68, and preparation method and application thereof
  • Low-temperature-curable epoxy resin used for matting powder B68, and preparation method and application thereof
  • Low-temperature-curable epoxy resin used for matting powder B68, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The epoxy resin for low-temperature curing type B68 matting powder described in this embodiment, its preparation raw material includes the raw material component of following mole percentage:

[0028]

[0029]

[0030] The preparation method of epoxy resin for low-temperature curing type B68 matting powder described in this embodiment comprises the following steps:

[0031] (1) Prepare the sodium hydroxide solution of the formula quantity with water to obtain a 30% solid content sodium hydroxide solution, and pump it into the reactor I, heat up to 30°C, add the bisphenol A of the formula quantity, and carry out the heat preservation reaction for 1-2h Then add the formula amount of epichlorohydrin, carry out heat preservation reaction at 80°C for 2-4h, after testing the pH of the solution, when the pH reaches below 9.5, stop the reaction to obtain a bisphenol A-terminated epoxy resin;

[0032] (2) Add a formulated amount of diethylene glycol diglycidyl ether to the...

Embodiment 2

[0037] The epoxy resin for low-temperature curing type B68 matting powder described in this embodiment, its preparation raw material includes the raw material component of following mole percentage:

[0038]

[0039] The preparation method of epoxy resin for low-temperature curing type B68 matting powder described in this embodiment comprises the following steps:

[0040] (1) Add water to prepare the sodium hydroxide solution of the formula quantity to obtain a sodium hydroxide solution with a solid content of 40%, and pump it into the reactor I, heat up to 35°C, add the bisphenol A of the formula quantity, and carry out the heat preservation reaction for 1-2h Then add the formula amount of epichlorohydrin, and carry out the heat preservation reaction at 90° C. for 2-4 hours. After testing the pH of the solution, when the pH reaches below 9.5, stop the reaction to obtain a bisphenol A-terminated epoxy resin;

[0041](2) Add a formulated amount of diethylene glycol diglycidy...

Embodiment 3

[0046] The epoxy resin for low-temperature curing type B68 matting powder described in this embodiment, its preparation raw material includes the raw material component of following mole percentage:

[0047]

[0048] The preparation method of epoxy resin for low-temperature curing type B68 matting powder described in this embodiment comprises the following steps:

[0049] (1) Prepare the sodium hydroxide solution of the formula quantity with water to obtain a 50% solid content sodium hydroxide solution, and pump it into the reactor I, heat up to 40°C, add the bisphenol A of the formula quantity, and carry out the heat preservation reaction for 1-2h Then add the formula amount of epichlorohydrin, and carry out the heat preservation reaction at 100 ° C for 2-4 hours. After testing the pH of the solution, when the pH reaches below 9.5, stop the reaction to obtain a bisphenol A-terminated epoxy resin;

[0050] (2) Add a formulated amount of diethylene glycol diglycidyl ether to...

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Abstract

The invention belongs to the technical field of powder coatings, and specifically relates to low-temperature-curable epoxy resin used for matting powder B68, and a preparation method and an application thereof. According to the low-temperature-curable epoxy resin used for the matting powder B68 provided by the invention, bisphenol A, epoxy chloropropane, sodium hydroxide, 2,2-dimethylmalonic acid,terephthalic acid, toluene, epoxy resin E-44 with high epoxy activity and the like are used as raw materials for polymerization; a high-activity monomer namely diethylene glycol diglycidyl ether is adopted as an end-capping agent for end capping; by adoption of manners of respectively preparing epoxy resin I and epoxy resin II through double formulas and mixing the epoxy resin I and the epoxy resin II, an epoxy resin product with relatively poor dispersion compatibility, soft chain segment and high activity is finally obtained, and a coating film with lower gloss can be easily obtained; meanwhile, due to different molecular chain segments, the epoxy resin product has significant activity difference and relatively-reduced softening point and can realize complete curing at a curing rate of150 DEG C / 20 min, so energy consumption is reduced to a large extent, and the gloss of a coating film can achieve of 5% or even lower.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to a low-temperature curing epoxy resin for B68 matting powder, a preparation method and application thereof. 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 d...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/03C09D7/42C08G59/06
CPCC08G59/063C08G59/066C08L2205/025C09D5/03C09D5/033C09D163/00C09D7/42C08L63/00
Inventor 汪年华罗乐平程殿辉江蓉王永垒
Owner 黄山五环科技有限公司
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