Low temperature curing thermosetting polyester powder coating and preparation method thereof

A technology of polyester powder and curing heat, applied in polyester coatings, powder coatings, coatings, etc., can solve the problems of ineffective improvement of labor productivity, restrictions on the application of powder coatings, and longer production cycles, and achieve excellent energy saving Effect, good economic benefit, good overall performance of the coating

Inactive Publication Date: 2014-10-29
GUANGDONG XINGFA ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this stage, the curing agent for thermosetting polyester powder coatings in my country mainly uses triglycidyl isocyanate (TGIC). Because TGIC is highly irritating and toxic, it is not good for human health, and the curing conditions of the polyester/TGIC system are harsh. : The curing temperature is higher (>200 ℃), the curing time is longer (10~30 min), and the higher curing temperature makes its energy consumption high (generally, the baking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 30g of amorphous saturated carboxyl-terminated polyester resin, 30g of crystalline carboxyl-terminated polyester resin, 4g of T105 (β-hydroxyalkylamide curing agent, HAA), 0.2g of tetramethylammonium bromide (curing accelerator), GLP505 (leveling agent) 1.5g, polyethylene wax (degassing agent) 0.5g, rutile titanium dioxide 20g, and barium sulfate 15g are dispersed in a pulverizer to fully mix each component; The feeder is fed into the melting extruder, heated and melted, and then pressed into flakes by a tablet cooler and cooled; the cooled flakes are crushed through a 160-mesh screen with a pulverizer to obtain a powder coating.

Embodiment 2

[0029] Similar to Example 1, the difference is that the amount of the amorphous saturated carboxyl-terminated polyester resin is 40 g, and that of the crystalline carboxyl-terminated polyester resin is 20 g.

Embodiment 3

[0031] Weigh 30g of amorphous saturated carboxyl-terminated polyester resin, 30g of crystalline carboxyl-terminated polyester resin, T105 (β-hydroxyalkylamide curing agent, HAA) 3.5g, triethylbenzylamine chloride (curing accelerator) 0.2g, GLP505 (leveling agent) 1.5g, benzoin (degassing agent) 0.5g, rutile titanium dioxide 20g, barium sulfate 15g and disperse in the pulverizer to make all components fully mixed evenly; It is sent into the melting extruder through the feeder, heated and melted, and then pressed into flakes by a tablet cooler and cooled; the cooled flakes are crushed through a 160-mesh sieve with a pulverizer to obtain a powder coating.

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PUM

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Abstract

The invention relates to a preparation method of low temperature curing thermosetting polyester powder coating. The low temperature curing thermosetting polyester powder coating is prepared from the following raw materials in parts by weight: 40-70 parts of polyester resin, 20-40 parts of pigment filler, 2-5 parts of curing agent, 0.1-0.2 part of curing accelerator, 1-5 parts of levelling agent and 0.5-1.5 parts of degassing agent. The preparation method of the low temperature curing thermosetting polyester powder coating comprises the following steps: placing raw materials into a grinding and dispersing machine to be dispersed until all the components are fully mixed, feeding uniformly mixed materials into a melt extrusion machine, heating and fusing, then crushing into slices by virtue of a tableting and cooling machine, and cooling; grinding the cooled slice materials by adopting a grinder, and sieving by adopting a sieve, so that the low temperature curing thermosetting polyester powder coating is obtained. The invention provides low temperature curing thermosetting coating which does not contain TGIC.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a low-temperature curing thermosetting polyester powder coating and a preparation method thereof. Background technique [0002] Thermosetting polyester powder coating film is widely used in metal coating because of its good weather resistance, corrosion resistance, electrical properties and mechanical properties, and excellent comprehensive performance. It is a kind of environmentally friendly powder coating that is currently used in a large amount. In developed countries such as Europe and the United States, its consumption accounts for more than 20% of the total consumption of powder coatings. The demand for coatings is growing rapidly. The annual amount of color spraying on architectural aluminum profiles (doors and windows, balconies, roofs, curtain walls, etc.) reaches more than 3,000 tons, and grows at a rate of 20% per year. It has become the main force in my co...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D7/12C09D5/03
Inventor 陈文泗陈东初叶秀芳冷文兵罗铭强
Owner GUANGDONG XINGFA ALUMINUM
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