Weather-resistant and environmentally-friendly powder coating for household appliances

A household appliance and powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve problems such as easy agglomeration, large powder storage stability attenuation, high curing temperature of coatings, etc., to ensure coating effect and improve The effect of anti-yellowing properties

Inactive Publication Date: 2013-07-17
徐伟箭
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AI Technical Summary

Problems solved by technology

In addition to strict restrictions on the toxicity of TGIC powder itself, one of its more fatal properties is that the powder storage stability decays rapidly and rapidly, and it is easy to agglomerate in summer, long-distance and long-term transportation (temperature above 35°C), causing The powder cannot be sprayed, and its performance also decays; after a long period of storage, the performance decays quickly; moreover, under the requirements of energy saving and carbon emission reduction, the curing temperature of polyester / TGIC powder coating is too high (200 ℃ / 15min), it is also Powder customers are gradually realizing the value limitation of their comprehensive cost

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0015] 1. The production process can adopt general process steps:

[0016] (1) The raw materials weighed according to the formula are pre-mixed on a high-speed mixer.

[0017] (2) Use a twin-screw extruder for melt extrusion and mixing, then cool and break into paint flakes.

[0018] (3) Finely pulverize with an air classification mill (ACM mill), and sieve and separate with a rotary sieve to obtain a powder coating product with an average particle size of 30-35 microns.

[0019] 2. Raw materials: The polyester resin of the present invention is a special carboxyl-terminated polyester resin; the curing agent is hydroxyalkylamide (HAA); the pigment and filler are inorganic pigments and fillers that do not contain lead and chromium, such as titanium dioxide, ultramarine blue, etc. Non-toxic pigments and fillers such as barium sulfate and kaolin; additives include special leveling agents, degassers, and dispersants containing polyamide wax components, and loosening agents to impr...

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Abstract

The invention discloses weather-resistant and environmentally-friendly powder coating for household appliances, relates to a novel coating in the field of new chemical materials and particularly relates to the technical field of energy-saving, weather-resistant and environmentally-friendly powder coatings for household appliances. The weather-resistant and environmentally-friendly powder coating is composed of resin, a curing agent, a pigment, stuffing and an assistant, wherein the mass percents of the resin, the curing agent, the pigment, the stuffing and the assistant in the total mass percent of the coating are respectively 60-65%, 3-5%, 27-32% and 3-5%. According to the invention, the defect of easy pinhole generation in the film coating process of HAA cured polyester powder coating is perfected, and no pinhole phenomenon is generated within a film coating thickness of 120 microns, so that the coating effect is guaranteed.

Description

technical field [0001] The invention relates to new coatings in the field of new chemical materials, in particular to the technical field of resource-saving and environment-friendly weather-resistant powder coatings for household appliances. Background technique [0002] In recent years, due to the advantages of environmental protection, economy, high efficiency and excellent performance, powder coatings have gradually become the main substitute for solvent-based coatings, and household appliances have also become the largest application field of powder coatings. [0003] At present, there are three main systems of powder coatings for home appliances: epoxy / polyester hybrid system, weather-resistant polyester / TGIC system, weather-resistant polyester / HAA system, and a small amount of weather-resistant polyurethane and acrylic system. Among them, the environmentally friendly weather-resistant polyester / HAA system has always been a hot issue in the world to replace the non-envi...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D5/03
Inventor 徐伟箭薛志荣杨军政
Owner 徐伟箭
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