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Epoxy resin coating reinforced by polyethylene glycol terephthalate crystal and preparation method thereof

A technology of polyethylene terephthalate and epoxy resin coatings, applied in the direction of epoxy resin coatings, anti-corrosion coatings, coatings, etc. Problems such as high film cohesion, to achieve the effect of reducing cracks, excellent barrier properties, and good performance parameters

Pending Publication Date: 2022-04-12
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a body-shaped polycondensation polymer material, epoxy resin is prone to further increase in curing degree and aging phenomenon during use, and will form a high-density cross-linked network after curing. This network structure makes the cohesion of the paint film high. The modulus of the paint film becomes low, the texture becomes brittle, it is difficult to deform under external force, it is easy to break and the impact resistance is poor

Method used

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  • Epoxy resin coating reinforced by polyethylene glycol terephthalate crystal and preparation method thereof
  • Epoxy resin coating reinforced by polyethylene glycol terephthalate crystal and preparation method thereof
  • Epoxy resin coating reinforced by polyethylene glycol terephthalate crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The epoxy resin coating that does not add polyethylene terephthalate crystallization reinforcement is obtained according to the following charging ratio (mass percentage content):

[0014]

[0015] Place the epoxy resin in an oven, heat it at 60°C for 20 minutes, and after the viscosity drops, take an appropriate amount of epoxy resin and dissolve it with hexafluoroisopropanol, and stir it manually at room temperature for 5 minutes until the system is uniform, colorless and transparent. state. Add epoxy resin curing agent, leveling agent and defoamer to the blending system, stir well with a glass rod, seal it and let it stand for 10 minutes, paint the blend on the tinplate sheet and place it in an oven at 100°C for baking Take it out after 2h. Impedance without polyethylene terephthalate epoxy coating is about 4×10 3 Ω.

Embodiment 2

[0017] The epoxy resin coating reinforced by polyethylene terephthalate crystallization is prepared according to the following proportioning ratio (mass percentage content):

[0018]

[0019]

[0020] Add melted and quenched polyethylene terephthalate into hexafluoroisopropanol solvent, seal it and let it stand for 2 hours to completely dissolve, then place the epoxy resin in an oven, heat it at 60°C for 20 minutes, and the viscosity will drop After that, an appropriate amount of epoxy resin was added into the polyethylene terephthalate / hexafluoroisopropanol system. Manually stir the polyethylene terephthalate / hexafluoroisopropanol / epoxy resin system at room temperature for 5 minutes until the system is uniform, colorless and transparent. Add epoxy resin curing agent, leveling agent and defoamer to the blend system, stir well with a glass rod, seal and let it stand for 10 minutes, paint the blend on the tinplate sheet and place it in an oven at 100°C for baking After 2 ...

Embodiment 3

[0022] The epoxy resin coating reinforced by polyethylene terephthalate crystallization is prepared according to the following proportioning ratio (mass percentage content):

[0023]

[0024] Add melted and quenched polyethylene terephthalate into hexafluoroisopropanol solvent, seal it and let it stand for 2 hours to completely dissolve, then place the epoxy resin in an oven, heat it at 60°C for 20 minutes, and the viscosity will drop After that, an appropriate amount of epoxy resin was added into the polyethylene terephthalate / hexafluoroisopropanol system. Manually stir the polyethylene terephthalate / hexafluoroisopropanol / epoxy resin system at room temperature for 5 minutes until the system is uniform, colorless and transparent. Add epoxy resin curing agent, leveling agent and defoamer to the blend system, stir well with a glass rod, seal and let it stand for 10 minutes, paint the blend on the tinplate sheet and place it in an oven at 100°C for baking After 2 hours, the c...

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Abstract

The invention discloses a polyethylene glycol terephthalate crystal reinforced epoxy resin coating and a preparation method thereof, and the coating comprises the following raw materials by mass: 36.5-39.5% of epoxy resin; 0.5%-5% of polyethylene glycol terephthalate; 40% of hexafluoroisopropanol; 18.3% to 19.8% of a curing agent; 0.1% of a leveling agent; and 0.1% of a defoaming agent. The coating is prepared according to the steps of dissolving, compounding, stirring, blending curing, baking and the like, the mechanical property and the corrosion resistance of the cured epoxy resin are improved through the crystallization behavior of polyethylene glycol terephthalate in the coating, and the optimal compounding proportion is obtained.

Description

technical field [0001] The invention relates to a polymer material and a preparation method, in particular to a polyethylene terephthalate crystal-reinforced epoxy resin coating and a preparation method. Background technique [0002] Paint coating is currently the most economical and effective means to deal with metal corrosion. The most common and efficient anti-corrosion coating is mainly thermosetting resin material. Epoxy resin is a kind of thermosetting resin. During its curing process, there are extremely active polar groups such as epoxy group and hydroxyl group, which endow it with a high degree of adhesion, so its cured product has high strength and Adhesive properties, and widely used in coatings and adhesives. However, as a body-shaped polycondensation polymer material, epoxy resin is prone to further increase in curing degree and aging phenomenon during use, and will form a high-density cross-linked network after curing. This network structure makes the cohesion...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D5/08C09D7/65C09D7/20
Inventor 李照磊周立犇陈立庄郭伟杰周海骏
Owner JIANGSU UNIV OF SCI & TECH
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