Epoxy/ polyester mixed powder coating

A powder coating and hybrid technology, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of increasing construction difficulty and production cost, unfavorable development of powder coatings, etc., to achieve good dispersion of inorganic pigments, Effect of shortening curing time and reducing cost

Inactive Publication Date: 2014-10-29
KUNSHAN DONGDA ZHIHUI TECH CONSULTANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Powder coatings are mainly used in the anti-rust and decoration of household appliances, automobiles, pipes and metal parts. They have the characteristics of clear coating film, fine surface, no solvent, no pollution, and coating can be formed in one coating. It has been widely used in the coating industry. The coating thickness of powder coating is an important factor to determine the decorative appearance of powder coating. Thicker coating has better leveling and covering properties. In the field, the coating film must be developed in the direction of thin coating. Thin coating has higher requirements for powder coatings, such as low resin melt viscosity, good pigment dispersion performance, strong hiding power, small coating particle size, good dry powder flow performance, etc., especially Especially for white powder coatings, in order to ensure that the coating film can achieve standard protection, modification and mechanical effects on dark metal surfaces, the coating film must reach a certain thickness, which is generally 70-80 μm at present, which is different from that of solvent-based coatings. Compared with the film thickness of 20-30 microns, it undoubtedly increases the construction difficulty and production cost, which is not conducive to the development of powder coatings

Method used

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  • Epoxy/ polyester mixed powder coating
  • Epoxy/ polyester mixed powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of epoxy / polyester hybrid powder coating, its composition and weight ratio are:

[0014] Epoxy resin E51 18%, polyester tree 899 32%, leveling agent 503 0.5%, brightener TL701 1.2%, titanium dioxide 17%, barium sulfate 30%, additive 0.5%, titanium nickel yellow 0.8%.

Embodiment 2

[0016] A kind of epoxy / polyester hybrid powder coating, its composition and weight ratio are:

[0017] Epoxy resin E51 20%, polyester tree 899 30%, leveling agent 503 1%, brightener TL701 1%, titanium dioxide 20%, barium sulfate 27%, additive 0.3%, molybdenum chrome red 0.7%.

Embodiment 3

[0019] A kind of epoxy / polyester hybrid powder coating, its composition and weight ratio are:

[0020] Epoxy resin E51 23%, polyester tree 899 25%, leveling agent 503 1.3%, brightener TL701 0.7%, titanium dioxide 24%, barium sulfate 25%, additive 0.5%, cobalt green 0.5%.

[0021] Production Process:

[0022] (1) Pre-mixing, pre-mixing barium sulfate and inorganic pigments in proportion to 700rpm for 1min;

[0023] (2) Mixing, add epoxy resin, polyester resin, leveling agent, brightener, titanium dioxide and additives to the pre-mixture in proportion, and mix at 800rpm for 3min;

[0024] (3) Extrusion, melt extrusion through a screw extruder, the temperature control of the three zones of the extruder is: zone one: 50-60°C, zone two: 80-95°C, zone three: 100-120°C;

[0025] (4) Grinding. The molten material is pressed into tablets by a tablet press, and the thickness is controlled at 3 mm. After being crushed, it is sent to a mill for crushing and grading. After passin...

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Abstract

The invention discloses an epoxy/ polyester mixed powder coating. The powder coating comprises the following components in percentage by weight: 18-23% of epoxy resin, 25-32% of polyester resin, 0.5-1.2% of flatting agent, 0.7-1.2% of brightener, 17-24% of titanium dioxide, 25-30% of barium sulfate, 0.3-0.5% of aid and 0.5-0.8% of inorganic pigment. The powder coating is good in leveling property; based on unchangeable performance of covering power, strength, luster and the like of a coating, the thickness of the coating is reduced, and the curing time is shortened, so that the powder coating is widely applied to decoration and corrosion prevention of household appliances, metal furniture, office equipment, instruments, mechanical equipment and pipelines.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to an epoxy / polyester mixed powder coating. Background technique [0002] Powder coatings are mainly used in the anti-rust and decoration of household appliances, automobiles, pipes and metal parts. They have the characteristics of clear coating film, fine surface, no solvent, no pollution, and coating can be formed in one coating. It has been widely used in the coating industry. The coating thickness of powder coating is an important factor to determine the decorative appearance of powder coating. Thicker coating has better leveling and covering properties. In the field, the coating film must be developed in the direction of thin coating. Thin coating has higher requirements for powder coatings, such as low resin melt viscosity, good pigment dispersion performance, strong hiding power, small coating particle size, good dry powder flow performance, etc., especially Especially f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D163/00C09D5/03C09D7/12
Inventor 武小国
Owner KUNSHAN DONGDA ZHIHUI TECH CONSULTANT
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