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Rapidly-cured powder coating for coiled materials and production method thereof

A powder coating and rapid curing technology, which is applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of short service life, low curing speed, and increased production cycle, so as to reduce production costs, shorten production cycles, and improve production efficiency. The effect of curing speed

Inactive Publication Date: 2014-02-05
宁波市东嘉新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the coatings for coil materials are sprayed with paint. The disadvantage is that the service life is short, and it takes 2 to 3 sprays to form. The paint film is easy to peel off and age. Therefore, there are powder coatings with long service life and one-time forming on the market. However, due to the limitation of raw materials of powder coatings, their curing speed is often not high. Generally, it needs 180~200℃ / 30-20min, which will increase the production cycle and increase the cost. Moreover, the existing powder coatings for coils have poor bending properties. , Adhesion is not high, which will also affect the performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The powder coating for a fast-curing coil provided by the present invention comprises a hydroxyl resin, a curing agent, a leveling agent, a deblocking agent, a defoaming agent, a pigment and a filler, and the above components are 50 parts by weight of the hydroxyl resin, The curing agent is 11 parts, the leveling agent is 1 part, the deblocking agent is 1 part, the defoamer is 0.4 parts, the pigment is 1.6 parts, and the filler is 35 parts. The hydroxyl value of the hydroxyl resin is 45 mg KOH / g ~ 55 mg KOH / g, the softening point is 110 ° C ~ 115 ° C; the curing agent is isocyanate, the softening point is 90 ° C ~ 110 ° C, and the glass transition temperature is 40 ° C ~ 65 ° C ℃; the leveling agent is acrylate, the softening point is 80℃~105℃, the solid content is ≥99%, and the epoxy value is 0.05~0.12; the deblocking agent is organotin and ammonia, the ratio is 6:4, both are Colorless and transparent liquid; defoamer is conventional emulsified silicone oil, silicone d...

Embodiment 2

[0015] In the powder coating for fast-curing coils provided by the present invention, the components in proportion by weight are 60 parts of hydroxyl resin, 14 parts of curing agent, 1 part of leveling agent, 1 part of deblocking agent, and 1 part of defoaming agent. The agent is 0.4 part, the pigment is 0.6 part, and the filler is 23 parts. The hydroxyl value of the hydroxyl resin is 45 mg KOH / g ~ 55 mg KOH / g, the softening point is 110 ° C ~ 115 ° C; the curing agent is isocyanate, the softening point is 90 ° C ~ 110 ° C, and the glass transition temperature is 40 ° C ~ 65 ° C ℃; the leveling agent is acrylate, the softening point is 80℃~105℃, the solid content is ≥99%, and the epoxy value is 0.05~0.12; the deblocking agent is organotin and ammonia, the ratio is 6:4, both are Colorless and transparent liquid; defoamer is conventional emulsified silicone oil, silicone defoamer with methyl polysiloxane as the main body; pigment is iron oxide; filler is barium sulfate and barit...

Embodiment 3

[0019] In the powder coating for fast-curing coils provided by the present invention, each component in proportion by weight is 55 parts of hydroxy resin, 12 parts of curing agent, 1 part of leveling agent, 1 part of unsealing agent, and 1 part of defoaming agent. The agent is 0.4 part, the pigment is 0.6 part, and the filler is 30 parts. The hydroxyl value of the hydroxyl resin is 45 mg KOH / g ~ 55 mg KOH / g, the softening point is 110 ° C ~ 115 ° C; the curing agent is isocyanate, the softening point is 90 ° C ~ 110 ° C, and the glass transition temperature is 40 ° C ~ 65 ° C ℃; the leveling agent is acrylate, the softening point is 80℃~105℃, the solid content is ≥99%, and the epoxy value is 0.05~0.12; the deblocking agent is organotin and ammonia, the ratio is 6:4, both are Colorless and transparent liquid; defoamer is conventional emulsified silicone oil, silicone defoamer with methyl polysiloxane as the main body; pigment can be mixed into the desired color by using red, ye...

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Abstract

The invention discloses a rapidly-cured powder coating for coiled materials. The powder coating contains the following components: by weight, 50-60 parts of hydroxyl resin, 11-14 parts of a curing agent, 1 part of a leveling agent, 1 part of a deblocking agent, 0.4 part of an antifoaming agent and 23.6-36.6 parts of pigment and filler. According to the invention, isocyanate, organo tin and ammonia react with hydroxyl resin with low softening point to obtain the powder coating, wherein organo tin and the deblocking agent of ammonia can be used to reduce deblocking temperature of the closed isocyanate and raise curing speed. As there is no increasing in molecular weight before reaching the deblocking temperature, an excellent leveling effect can be achieved. The powder coating has comprehensive effects as follows: curing speed is raised and the curing time is reduced to 3min from original 30min; baking time is minimized; energy is saved; production cycle is shortened; production cost is reduced; and production efficiency is raised.

Description

technical field [0001] The present invention relates to a coating for coils, in particular to a powder coating for fast-curing coils and a method for producing the above-mentioned powder coating. Background technique [0002] At present, most of the coatings for coils are sprayed with paint. The disadvantage is that the service life is short, and it takes 2 to 3 sprays to form. However, due to the limitation of its own raw materials, powder coatings often have a low curing speed, generally requiring 180~200℃ / 30-20min, which will increase the production cycle and cost, and the existing powder coatings for coils have poor bending performance , The adhesion is not high, which will also affect the performance of the product. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a powder coating for coils that can achieve rapid curing, strong adhesion, and good bending performance in order to solve the above-mentioned deficiencies of the prior ar...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/46C09D7/12
Inventor 陈召珠陈世尧李红
Owner 宁波市东嘉新材料科技有限公司
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