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Infrared curing powder paint and preparation method thereof

A powder coating, infrared curing technology, used in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems of high price, reduce the infrared absorption of coatings, affect the gloss and leveling of coatings, and achieve high cross-linking. The effect of density, high infrared absorption rate, and fast curing speed

Active Publication Date: 2019-10-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN 105713490A discloses a multi-system infrared-curable powder coating for MDF, which mainly uses multiple curing systems and different functional groups to cooperate with infrared absorption, but it is added with more micron fillers. Although it can increase the surface hardness of the coating, it will also reduce The infrared absorption of the coating affects the mechanical properties, corrosion resistance and chemical resistance of the coating, and the multi-curing system is easy to affect the coating gloss and leveling properties
CN 109321101A discloses a weather-resistant powder coating with infrared rapid curing, which also adds more micron filler titanium dioxide and barium sulfate, which will affect the infrared absorption rate of the coating; although it absorbs infrared rays by adding indium tin oxide rare earth nano metal compounds Additives improve the infrared absorption of coatings, but such infrared absorbers are expensive and belong to 2B carcinogens, which are not suitable for practical applications

Method used

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  • Infrared curing powder paint and preparation method thereof
  • Infrared curing powder paint and preparation method thereof
  • Infrared curing powder paint and preparation method thereof

Examples

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Effect test

Embodiment 1

[0062] The present embodiment provides a kind of infrared curing powder coating, and its preparation method is as follows:

[0063] (1) In parts by weight, 20 parts of bisphenol A type epoxy resin (epoxy value 0.12), 30 parts of glycidyl acrylic resin (epoxy value 0.2), carboxyl polyester (acid value 70mg KOH / g ) 30 parts, self-blocking polyisocyanate (Degussa EP-BF 1320) 1.25 parts, undecanedioic acid 5 parts, hydroxyl-terminated hyperbranched polyester resin (number average molecular weight 1100, hydroxyl value 600mgKOH / g) 5 parts, nano 0.5 parts of titanium dioxide (particle size 30-80nm) and 2 parts of 2-phenylimidazoline are fully mixed and broken;

[0064] (2) Add the mixed material obtained in step (1) into an extruder, extrude at 100° C. and press into tablets, cool and pulverize to 20-80 μm, and sieve to obtain an infrared-curable powder coating.

Embodiment 2

[0066] The present embodiment provides a kind of infrared curing powder coating, and its preparation method is as follows:

[0067] (1) In parts by weight, 25 parts of bisphenol A type epoxy resin (epoxy value 0.12), 25 parts of glycidyl acrylic resin (epoxy value 0.20), carboxyl polyester (acid value 50mg KOH / g ) 35 parts, 0.75 parts of self-blocking polyisocyanate (DegussaEP-BF 1321), 4 parts of hexadecanedioic acid, 3 parts of hydroxyl-terminated hyperbranched polyester resin (number average molecular weight 2400, hydroxyl value 560mgKOH / g), 3 parts of nanometer di 5 parts of silicon oxide (particle size 30-80nm), 1.5 parts of 2-phenylimidazoline, 2 parts of leveling agent and 1.5 parts of benzoin are fully mixed and crushed;

[0068] (2) Add the mixed material obtained in step (1) into an extruder, extrude at 80° C. and press into tablets, cool and pulverize to 20-80 μm, and sieve to obtain an infrared-curable powder coating.

Embodiment 3

[0070] The present embodiment provides a kind of infrared curing powder coating, and its preparation method is as follows:

[0071] (1) In parts by weight, 30 parts of bisphenol A type epoxy resin (epoxy value 0.12), 20 parts of glycidyl acrylic resin (epoxy value 0.20), carboxyl polyester (acid value 50mg KOH / g ) 40 parts, self-blocking polyisocyanate (DegussaEP-BF 1320) 0.5 parts, dodecanedioic acid 3 parts, hydroxyl-terminated hyperbranched polyester resin (number average molecular weight 1100, hydroxyl value 600mgKOH / g) 2 parts, nano-oxidized 4 parts of aluminum (particle size 30-80nm), 1 part of 2-phenylimidazoline, 1.5 parts of leveling agent and 1 part of benzoin are fully mixed and broken;

[0072] (2) Add the mixed material obtained in step (1) into an extruder, extrude at 90° C. and press into tablets, cool and pulverize to 20-80 μm, and sieve to obtain an infrared-curable powder coating.

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Abstract

The invention provides infrared curing powder paint and a preparation method thereof. The infrared curing powder paint comprises, by weight, 50 parts of matrix resin, 12-50 parts of a curing agent, 0.5-5 parts of aliphatic binary acid, 0.5-5 parts of hydroxyl functional hyperbranched resin and 0.5-5 parts of a nano filler. The infrared curing powder paint is prepared by mixing the components, extruding the components by an extruder and tabletting and crushing the components. The infrared curing powder paint has a relatively high infrared absorption rate and is high in curing speed, a coating formed after curing has relatively high crosslinking density, hardness, toughness, adhesive force, solvent resistance, acid and alkali resistance and moisture and heat resistance, and the paint is suitable for coating of heat-sensitive base materials such as wood, engineering plastics, glass and paper.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to an infrared curing powder coating and a preparation method thereof. Background technique [0002] Powder coating is a new type of green coating product. It is solvent-free and pollution-free. It is usually sprayed on the surface of metal materials and cured by heating. It has been applied in many fields such as home appliances, building materials, and machinery. [0003] In recent years, infrared curing has been gradually applied in the field of powder coatings. Compared with thermal curing, infrared curing only acts on the resin coating without damaging the substrate. It is especially suitable for heat-sensitive substrates, and infrared curing has lower energy consumption and higher production efficiency. higher. The range of infrared wavelengths is between 0.76-1000 μm, which can be divided into far infrared, mid-wave infrared (wavelength 2.5-25 μm), near-i...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D167/00C09D163/00C09D5/03C09D5/08C09D7/61
CPCC08K2003/2241C08K2201/011C08L2205/025C08L2205/035C09D5/033C09D5/08C09D133/068C09D167/00C08L63/00C08L67/00C08K3/22C08L33/068
Inventor 陈运法王好盛张婧坤薛杨张冬海
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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