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Thermo-sensitive epoxy resin powder paint

A technology of epoxy resin powder and epoxy resin, which is applied in the field of powder coatings, can solve the problems of restricting the expansion and promotion of the application range of powder coatings, the inability to improve labor production efficiency, and the increase of the floor area of ​​coating lines, etc., to achieve shortening Curing time, shorter production cycle, and energy-saving effects

Inactive Publication Date: 2010-05-19
宁波市鄞州东海粉末涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the finishing process of powder coatings makes the coating thicker, resulting in poor deep curing, and the surface shape of the object to be coated is complex and changeable, and there is a dark side that cannot be directly irradiated by ultraviolet light, resulting in uneven curing.
The above-mentioned defects limit the development of light-curing, especially UV-curing powder coatings.
[0003] The curing conditions of general powder coatings are mostly high baking temperature and long baking time, which brings considerable problems to the coating of heat-resistant coatings such as plastics, wood, various density boards, and nine-plywood. The difficulties restrict the expansion and promotion of the application range of powder coatings. If the baking time is too long and the production cycle of the product is long, the floor area of ​​the coating line must be increased accordingly, and the labor production efficiency cannot be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The main components are selected; the low softening point epoxy resin is bisphenol A epoxy resin E-14, the softening point temperature is 78-85°C, the epoxy value is 0.10-0.18, and the appearance is close to yellow transparent solid.

[0015] Curing agent 2-phenylimidazoline, white or light yellow crystal, molecular weight 146, melting point 96-100°C.

[0016] The chemical name of the photoinitiator (Photocure907) is 2-methyl-1-(4-methylphenyl)-2morpholino-1-propanone, the molecular weight is 279, the melting point is 72-75°C, and it is a white powder.

[0017] The leveling agent is glycidyl acrylate copolymer, epoxy value 0.05-0.12, solid powder.

[0018] The pigment is titanium oxide powder.

[0019] The filler is calcium carbonate and barium sulfate powder, titanium oxide: calcium carbonate: barium sulfate=1:1:1.

[0020] Composition ratio: 60% by weight of epoxy resin with low softening point, 3% by weight of curing agent, 1% by weight of photoinitiator, 1% by wei...

Embodiment 2

[0024] The main components are selected; the low softening point epoxy resin is bisphenol A epoxy resin E-20, the softening point temperature is 65-76°C, the epoxy value is 0.18-0.22, and it is a yellow transparent solid.

[0025] The curing agent is 2-ethylimidazole, white light yellow crystal, melting point temperature 61-66℃, molecular weight 96.

[0026] The chemical name of the photoinitiator (PhotocureITX-P) is 2-isopropylthioxanthone, the molecular weight is 254, the melting point is 70-76°C, and it is a light yellow powder.

[0027] Leveling agent adopts glycidyl acrylate copolymer, epoxy value 0.05-0.12, solid powder.

[0028] The pigment is iron oxide red, and the filler is calcium carbonate and barium sulfate powder.

[0029] Composition ratio: low softening point epoxy resin is 65% by weight, curing agent is 4% by weight, photoinitiator is 0.8% by weight, leveling agent is 1.1% by weight, defoamer is 1.0% by weight, and pigment is 0.1% By weight, the filler is 28...

Embodiment 3

[0033] The main components are selected; the low softening point epoxy resin is bisphenol A epoxy resin E-14, the softening point temperature is 78-85°C, the epoxy value is 0.10-0.18, and the appearance is close to a yellow transparent solid.

[0034] Curing agent, 2-propylimidazole, white or light yellow crystal, molecular weight 110, melting point 60-62°C.

[0035] The photoinitiator is a mixture of Photocure907 and PhotocureITX-P, and the weight ratio of the two is 1:1.

[0036] Leveling agent adopts glycidyl acrylate copolymer, epoxy value 0.05-0.12, solid powder.

[0037] The pigments vary according to the needs of the user and the material to be coated. For example, according to the depth of the wood, the three primary colors of red, yellow and blue are mixed to form the desired color.

[0038] Composition ratio: low softening point epoxy resin is 70% by weight, curing agent is 5% by weight, photoinitiator is 1.0% by weight, leveling agent is 0.5% by weight, defoamer is...

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Abstract

The thermosensitive epoxy resin powder paint consists of low softening point epoxy resin 60-70 wt%, curing agent 3-6 wt%, photoinitiator 0.5-1.0 wt%, leveling agent 1-2 wt%, defoaming agent 0.5-1.0 wt%, and pigment and stuffing 20-35 wt%. The present invention has imidazole type low temperature curing agent resulting in low temperature fast curing and photoinitiator to further raise low temperature curing speed, so that the paint has high low temperature curing speed. The present invention has short production period, low power consumption, low production cost and high production efficiency.

Description

technical field [0001] The invention relates to a powder coating, in particular to an epoxy resin powder coating which can be cured at low temperature and can be used for surface finishing of plastics or wood products. Background technique [0002] As a solvent-free decorative and protective material, powder coatings are widely used in surface decoration of household appliances, automobiles and lamps due to their advantages of cleanness, environmental protection, excellent performance and cost reduction. In recent years, with the environmental protection characteristics of powder coatings, the application has been expanded In the field of non-metallic surfaces, especially plastic or wood products, the surface coating volume is large and wide, and the use of powder coatings is urgently promoted to meet environmental protection requirements. In order to achieve this goal, people first use curable powder coatings irradiated by ultraviolet light, but in the use of UV curable pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/03
Inventor 陈召珠谷敏
Owner 宁波市鄞州东海粉末涂料有限公司
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