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Weather-resistant fluorocarbon powdery coating, and preparation method and application thereof

A powder coating and weather resistance technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problem that the weather resistance of the coating surface such as acid resistance, alkali resistance and aging resistance cannot be improved, and the adhesion of powder coatings , poor impact resistance, reduced weather resistance of the coating film, etc., to achieve the effect of saving manpower and material resources, beautiful touch, and soft appearance

Inactive Publication Date: 2019-03-01
佛山市涂亿装饰材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure fluorocarbon system powder coatings have inherent deficiencies in adhesion, pigment and filler wettability, etc., coupled with their high material costs, making pure fluorocarbon system powder coatings progress slowly in market application and promotion.
In order to solve these problems, the common practice is to add some thermosetting polyester resin components. However, the introduction of polyester resin will reduce the weather resistance of the coating film, because the ultraviolet rays first destroy the interpenetrating network system of fluorocarbon resin and polyester resin The polyester solidifies the crosslinking points, thereby destroying the interpenetrating network system and destroying the overall coating film, making the adhesion and impact resistance of the prepared powder coating coating poor. At the same time, the coating surface Weather resistance properties such as acid resistance, alkali resistance and aging resistance are not improved

Method used

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  • Weather-resistant fluorocarbon powdery coating, and preparation method and application thereof
  • Weather-resistant fluorocarbon powdery coating, and preparation method and application thereof
  • Weather-resistant fluorocarbon powdery coating, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention provides a kind of weather-resistant fluorocarbon powder coating, comprising A component and B component compounded by weight ratio 1:3-3:1, wherein,

[0029] The A component includes the following raw materials in parts by weight:

[0030]

[0031] The B component includes the following raw materials in parts by weight:

[0032]

[0033]

[0034] The hydroxyl value of the hydroxyl-terminated polyester resin is 30-40 mgKOH / g, the melt rotation viscosity is 4000-8000 mPa·s / 200°C, and the glass transition temperature is 62-68°C.

[0035] The acid value of the carboxyl-terminated polyester resin is 30-55 mgKOH / g, the melt rotation viscosity is 3500-9000 mPa·s / 200°C, and the glass transition temperature is 50-60°C.

[0036] The curing agent is isophorone diisocyanate polymer blocked by caprolactam.

[0037] The leveling agent is polysiloxane or polyester modified polyether.

[0038] The degassing agent is benzoin.

[0039] The crosslinking...

Embodiment 2

[0049] On the basis of Example 1, this Example 2 is a preferred example of weather-resistant fluorocarbon powder coatings, including A component and B component, and the A component includes the following raw materials in proportions by weight:

[0050]

[0051] The B component includes the following raw materials in parts by weight:

[0052]

[0053]

[0054] Wherein, the pigment and filler are a mixture of carbon black and titanium dioxide in a weight ratio of 1:1.

[0055] The preparation method of described weather resistance fluorocarbon powder coating, comprises the following steps:

[0056] (1) Preparation of component A: Put the FEVE fluorocarbon resin, hydroxyl-terminated polyester resin, curing agent, leveling agent, degassing agent, pigments and fillers and cross-linking curing agent into the mixing tank according to the corresponding proportion , after stirring and mixing at a speed of 130r / min for 6 minutes, set aside;

[0057] (2) Preparation of componen...

Embodiment 3

[0061] On the basis of Example 2, this Example 2 is a preferred example of weather-resistant fluorocarbon powder coatings, including component A and component B compounded at a weight ratio of 1:3-3:1, wherein,

[0062] The A component includes the following raw materials in parts by weight:

[0063]

[0064]

[0065] The B component includes the following raw materials in parts by weight:

[0066]

[0067] Wherein, the pigment and filler is a mixture of titanium dioxide, iron red powder and iron blue in a weight ratio of 3:2:2.

[0068] The preparation method of the powder coating adopts the preparation method in Example 2.

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Abstract

The invention discloses a weather-resistant fluorocarbon powdery coating, and a preparation method and an application thereof. The coating includes a component A and a component B which are compoundedaccording to the weight ratio of 1:3-3:1; the component A includes: 120-260 parts of FEVE fluorocarbon resin, 60-200 parts of hydroxyl-terminated polyester resin, 50-90 parts of a curing agent, 3-10parts of a flatting agent, 2-5 parts of a degassing agent, 50-100 parts of pigments and fillers, and 4-10 parts of a crosslinking and curing catalyst; the component B includes: 120-260 parts of PVDF fluorocarbon resin, 60-200 parts of carboxyl-terminated polyester resin, 50-90 parts of the curing agent, 3-10 parts of the flatting agent, 2-5 parts of the degassing agent, 50-100 parts of the pigments and fillers, and 4-10 parts of the crosslinking and curing catalyst. On the basis of the super-strong weather resistance of a fluorocarbon system, the powdery coating overcomes the problem of poor adhesion force and anti-impact effect of thermosetting fluorocarbon powder. The coating has advantages of one-time coating and simple operation steps, is more acceptable by users, and is applied to metal workpieces, especially aluminum profiles.

Description

technical field [0001] The invention belongs to the field of powder coatings, and in particular relates to a weather-resistant fluorocarbon powder coating and its preparation method and application. Background technique [0002] At present, most fluorocarbon coatings in the market are solvent-based coatings, and their production and coating process will emit a large amount of volatile organic compounds. With the improvement of environmental protection laws and regulations, the environmental protection requirements of coatings are becoming more and more stringent. It is very important to minimize VOC emissions in the production and coating process, but as a solvent-based fluorocarbon coating, no matter how it is improved, there will be varying degrees of VOC emissions. As a VOC-free green and environmentally friendly coating, especially thermosetting fluorocarbon powder coatings, its manufacturing and coating processes are basically similar to ordinary powder coatings, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D127/16C09D167/00C09D5/03C09D7/61
CPCC08K2003/2241C08K2003/2272C08K2003/327C08L2205/03C09D5/033C09D127/12C08L27/16C08L67/00C08K3/04C08K3/22C08K3/32
Inventor 吴延军
Owner 佛山市涂亿装饰材料科技有限公司
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