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High-brightness powder coating and preparation method thereof

A powder coating and bright technology, used in powder coatings, polyester coatings, coatings, etc., can solve the problems that powder coatings are difficult to meet requirements, and the brightness of coatings is not high.

Inactive Publication Date: 2020-11-24
HUNAN LIANXIN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing powder coatings are applied after the plate is cured to form a coating. The brightness of the coating is generally not high. It is generally in a matte or plain state. Most of the coatings are in a matte state. For some occasions that require high gloss, the current powder coating difficult to meet

Method used

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  • High-brightness powder coating and preparation method thereof
  • High-brightness powder coating and preparation method thereof
  • High-brightness powder coating and preparation method thereof

Examples

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Effect test

preparation example Construction

[0031] A preparation method of high gloss powder coating, the method is:

[0032] Mixing: Add polyester resin, silicone resin, methylphenol phenolic resin, curing agent, leveling agent, defoamer and benzoin into the mixer at a temperature of 40-50°C and a speed of 250-450r / min, mixed for 5-10min to obtain the mixture;

[0033] Extrusion: Put the compound into the twin-screw extruder, the cavity temperature is 90-105°C, the head temperature is 100-110°C, the screw speed is 150-200r / min, melt extrusion to obtain the extrudate ;

[0034] Tabletting: Add the extrudate to a tablet press while it is hot for tableting, and then cool it down naturally to obtain a tablet;

[0035] Pulverization: put the compressed tablet into a pulverizer, the single pulverization time is 15-30s, the pulverization times are 3-5 times, and pass through a 200-300 mesh sieve to obtain a powder coating.

Embodiment 1

[0037] A kind of high gloss powder coating, raw material comprises by weight component:

[0038]

[0039] Wherein, the curing agent is β-hydroxyalkylamide; the leveling agent is polydimethylsiloxane; the brightener is an acrylic ester copolymer; the defoaming agent is emulsified silicone oil.

[0040] A preparation method of high gloss powder coating, the method is:

[0041] Mixing: Add polyester resin, silicone resin, methylphenol phenolic resin, curing agent, leveling agent, defoamer and benzoin into the mixer at a temperature of 40°C and a speed of 450r / min, and mix 5min, to obtain the mixture;

[0042] Extrusion: Add the mixed material to the twin-screw extruder, the cavity temperature is 90°C, the head temperature is 100°C, the screw speed is 200r / min, melt extrusion to obtain the extrudate;

[0043] Tabletting: Add the extrudate to a tablet press while it is hot for tableting, and then cool it down naturally to obtain a tablet;

[0044] Pulverization: put the compr...

Embodiment 2

[0046] A kind of high gloss powder coating, raw material comprises by weight component:

[0047]

[0048] Wherein, the curing agent is phenolic resin; the leveling agent is alkyl modified organosiloxane; the brightener is methyl methacrylate homopolymer; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0049] A preparation method of high gloss powder coating, the method is:

[0050] Mixing: Add polyester resin, silicone resin, methylphenol phenolic resin, curing agent, leveling agent, defoamer and benzoin into the mixer at a temperature of 42°C and a speed of 420r / min, and mix 7min, obtain mixture;

[0051] Extrusion: Add the mixed materials into the twin-screw extruder, the cavity temperature is 102°C, the head temperature is 108°C, the screw speed is 160r / min, melt extrusion to obtain the extrudate;

[0052] Tabletting: Add the extrudate to a tablet press while it is hot for tableting, and then cool it down naturally to obtain a tablet; ...

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Abstract

The invention discloses a high-brightness powder coating and a preparation method thereof. The raw materials include the components in parts by weight: 40-55 parts of polyester resin, 15-25 parts of organic silicon resin, 6-15 parts of methyl phenol-type phenolic resin, 3-7 parts of a curing agent, 1-1.8 parts of a leveling agent, 0.5-1.2 parts of a defoaming agent, and 0.4-0.8 part of benzoin. The powder coating is applied on boards to form a coating, the coating has high brightness, the performance of adhesion, impact resistance and hardness is greatly improved, and the overall performance is excellent.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a high-gloss powder coating and a preparation method thereof. Background technique [0002] Powder coating is a rapidly developing field in the whole coating technology. Because its VOC emission is almost zero, environmental protection requirements have driven its rapid development. Global and Chinese environmental laws and regulations are becoming more and more stringent, effectively promoting the development of the environmentally friendly powder coating industry. [0003] Existing powder coatings are applied after the plate is cured to form a coating. The brightness of the coating is generally not high. It is generally in a matte or plain state. Most of the coatings are in a matte state. For some occasions that require high gloss, the current powder coating Difficult to meet requirements. Contents of the invention [0004] In view of this, the invention provides a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/65C09D183/04C09D161/08C09D133/04C09D133/12C09D123/06
CPCC08L2205/035C09D5/033C09D167/00C08L83/04C08L61/06C08L33/04C08L33/12C08L23/06
Inventor 夏连心方志望朱满子李时雨
Owner HUNAN LIANXIN SCI & TECH CO LTD
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