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A weather-resistant metal pattern effect single-coat powder coating

A powder coating and weather-resistant technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of difficult pattern appearance and weak three-dimensional effect, and achieve clear pattern effect, strong metal three-dimensional effect, and three-dimensional effect. strong effect

Active Publication Date: 2018-06-08
ZHEJIANG CHAOLANG ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the general-purpose polyester currently on the market is suitable for flat coating, which has a high leveling effect and is not suitable for pattern powder. The pattern is not easy to float out and the three-dimensional effect is not strong.

Method used

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  • A weather-resistant metal pattern effect single-coat powder coating
  • A weather-resistant metal pattern effect single-coat powder coating
  • A weather-resistant metal pattern effect single-coat powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 5

[0044] The invention relates to a weather-resistant metal pattern effect single-coat powder coating, the formula of which comprises 90-99.5% of base powder A and 0.5-10% of metal powder B.

[0045] The metal powder B is a composite pearlescent pigment.

[0046] The constituents and percentages by weight of the base powder A are:

[0047] Weather-resistant polyester resin 55-80%; curing agent 4.0-6.2%; modified barium sulfate 0-40%; plasticizer 0.3-1.5%;

[0048] 0.02-2% curing accelerator; 1-5% auxiliary agent; 0-25% pigment; 0.05-0.5% texture agent.

[0049] The above curing agent is TGIC curing agent.

[0050] The above additives are self-made modified embossing agent and CAB cellulose acetate thixotropic additive. The invention adopts self-made modified embossing agent, which is a kind of surfactant, which is made of silicone oil-modified acrylate compound. The auxiliary agent has a very narrow particle size distribution after strict control, and has various particle siz...

Embodiment 1

[0059] Example 1 has an exposure rate of 47% after 1000 hours of artificial accelerated aging; Example 2 has an exposure rate of 65%; Example 3 has an exposure rate of 69%. The main change in the formula of polyester resin is to increase the amount of terephthalic acid, showing The weather resistance of isophthalic acid is better than terephthalic acid, so need to adopt isophthalic acid as main acid monomer for the polyester resin of super weather resistance; Embodiment 1 impact performance is 50KG / CM without crack; Embodiment 2 The impact performance is 30KG / CM without cracks; the impact performance of Example 3 is 30KG / CM without cracks, the dosage of isophthalic acid in the formula increases, and the impact performance of the coating film decreases.

Embodiment 4

[0060] The glass transition temperature (TG) of the polyester resin prepared in Example 4 was 62.1°C; the glass transition temperature (TG) of the polyester resin prepared in Example 5 was 65.3°C, indicating that after the naphthalene dioic acid is inserted into the main chain of the polyester resin, Form bigger steric hindrance, can obviously promote the glass transition temperature of polyester resin, improve the storage stability of the powder coating of preparation; The acid value of the polyester resin prepared in embodiment 4 is 34.9mgKOH / g; Polyester resin prepared in embodiment 5 The acid value of the ester resin is 40.3mgKOH / g; the coating film of Example 5 has a high crosslinking density, and the surface of the coating film is dense, and moisture and organic solvents are difficult to enter the inside of the coating film, causing swelling or hydrolysis of the coating film. Therefore, the high crosslinking density The coating film has good weather resistance.

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Abstract

The invention relates to weather-resisting type single-coating powder paint with metal pattern effect. The weather-resisting type single-coating powder paint comprises bottom powder A and metal powder B; the bottom powder A is prepared from the following components in percentage by weight: 55 percent to 80 percent of weather-resisting type polyester resin, 4.0 percent to 6.2 percent of a curing agent, 0 to 40 percent of modified barium sulfate, 0.3 percent to 1.5 percent of a plasticizer, 0.02 percent to 2 percent of a curing accelerator, 1 percent to 5 percent of an auxiliary agent, 0 to 25 percent of pigment and 0.05 percent to 0.5 percent of a texturizing agent; the weather-resisting type polyester resin is synthesized from the following raw materials: neopentyl glycol, butylene glycol, 2-methyl-1,3-propylene glycol, cyclohexanedimethanol, 2-butyl-2-ethyl-propylene glycol, terephthalic acid and the like. By adopting modified polyester, the weather-resisting type single-coating powder paint with metal pattern effect has excellent weather resistance and also has a three-dimensional pattern effect; the weather-resisting type single-coating powder paint with metal pattern effect can be thickly applied and a thickly coated film with the thickness of 60UM to 120UM is formed by coating in one step; the coated film only needs to be cured for one time; the weather-resisting type single-coating powder paint with metal pattern effect has the characteristics of 10-year weather resistance, high metal stereoscopic impression, clear pattern effect, good coverage, good mechanical property, low cost, no pollution to the environment and the like.

Description

technical field [0001] The invention belongs to chemical powder coatings, in particular to a single-coating powder coating with a weather-resistant metal pattern effect. Background technique [0002] Metal effect polyester epoxy mixed pattern powder coatings and pure polyester pattern powder coatings are widely used in hardware, furniture, electrical appliances, security doors, aluminum and magnesium profiles and other indoor decorative products and outdoor durable installation products. Compared with the epoxy type, this powder has better weather resistance, and the raw materials are convenient to purchase and the price is low. Therefore, this type of powder coating has been widely used and promoted in the domestic market once it is launched. But at the moment, customers have higher and higher requirements for weather resistance, and the above two powders cannot meet the requirements of a service life of 5-8 years, or even longer. In order to solve this problem, some powde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C09D5/28C09D5/03C09D5/36C09D7/62C09D7/65C08G63/20
CPCC08G63/20C08L2205/035C09D5/033C09D5/035C09D5/28C09D5/36C09D167/00C08L1/14C08K13/06C08K9/00C08K2003/3045C08K3/36
Inventor 杨庆伟滕学芳
Owner ZHEJIANG CHAOLANG ADVANCED MATERIALS
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