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High-weather resistance polyester type powder coating

A powder coating and weather resistance technology, used in polyester coatings, powder coatings, coatings, etc., can solve the problems of affecting mechanical properties and decorative properties, easy aging, poor weather resistance, etc., and achieve excellent chemical corrosion resistance, good Effects of heat and weather resistance, good storage capacity

Inactive Publication Date: 2014-10-29
中山市鸿朗装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Powder coating is a kind of green coating without volatile solvents. It has the advantages of no solvent, low pollution, high material utilization rate and low energy consumption. It is widely used in pipelines, metals, outdoor structural parts and other facilities. Powder coatings use resin and curing After the agent is heated, a cross-linking reaction occurs to form an infusible hard coating. No matter how high the temperature is, the coating can only decompose and will not soften like a thermoplastic resin coating, so it has strong mechanical properties. Therefore, it can be used outdoors Components, such as metal guardrails, railways, and road traffic facilities, mostly use powder coatings as anti-corrosion coatings. However, due to the presence of aromatic ether groups in the resin, the coating is extremely sensitive to ultraviolet rays, so that the weather resistance is not high. It is easy to yellow and powder during the process, which affects its mechanical properties and decorative properties, especially the coatings exposed to the sun for a long time in summer are more likely to age

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0013] A kind of high weather resistance polyester type powder coating, its raw material and each component mass ratio are:

[0014] Polyester resin P6800 60%, titanium dioxide 18%, barium sulfate 14%, curing agent TEFC 5%, leveling agent GLP-503 1%, brightener TL701 1%, additive 0.5%, inorganic pigment molybdenum chrome red 0.5 %.

Embodiment 2

[0016] A kind of high weather resistance polyester type powder coating, its raw material and each component mass ratio are:

[0017] Polyester resin P880 55%, titanium dioxide 22%, barium sulfate 16%, curing agent TEFC 3%, leveling agent GLP-504 1.5%, brightener TL701 1.5%, additive 0.3%, inorganic pigment titanium nickel yellow 0.7 %.

Embodiment 3

[0019] A kind of high weather resistance polyester type powder coating, its raw material and each component mass ratio are:

[0020] Polyester resin P885 65%, titanium dioxide 15%, barium sulfate 12%, curing agent TEFC 6%, leveling agent GLP-505 0.5%, brightener TL701 0.5%, additive 0.7%, inorganic pigment cobalt green 0.3% .

[0021] Preparation Process:

[0022] (1) Put each raw material in a mixer according to the composition ratio and mix at a rate of 650rpm for 5 minutes. (2) Melt and extrude the mixed raw materials through a screw extruder. Material section temperature 105°C;

[0023] (3) The molten material is pressed into tablets by a tablet press, and the thickness is controlled at 3 mm, and then crushed and sent to a mill for pulverization, and passed through a 200-mesh sieve.

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Abstract

The invention discloses a high-weather resistance polyester type powder coating which comprises the following components in percentage by weight: 55%-65% of polyester resin, 15%-22% of titanium dioxide, 12%-16% of barium sulfate, 3%-6% of curing agents, 0.5%-1.5% of leveling agents, 0.5%-1.5% of brightening agents, 0.3%-0.7% of auxiliary agents and 0.3%-0.7% of inorganic pigments. The high-weather resistance polyester type powder coating has the advantages of good heat resisting property and weather resisting property and excellent chemical corrosion resistant property and can be widely applied to the coating of anti-corrosion layers of outdoor structural parts such as metal guardrails, railways and road transport facilities.

Description

technical field [0001] The invention relates to the field of powder coatings, in particular to a polyester powder coating with high weather resistance. Background technique [0002] Powder coating is a kind of green coating without volatile solvents. It has the advantages of no solvent, low pollution, high material utilization rate and low energy consumption. It is widely used in pipelines, metals, outdoor structural parts and other facilities. Powder coatings use resin and curing After the agent is heated, a cross-linking reaction occurs to form an infusible hard coating. No matter how high the temperature is, the coating can only decompose and will not soften like a thermoplastic resin coating, so it has strong mechanical properties. Therefore, it can be used outdoors Components, such as metal guardrails, railways, and road traffic facilities, mostly use powder coatings as anti-corrosion coatings. However, due to the presence of aromatic ether groups in the resin, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03
Inventor 武小国
Owner 中山市鸿朗装饰材料有限公司