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Water-based fluorocarbon finish paint and preparation method and application thereof

A water-based fluorocarbon and topcoat technology, applied in the field of coatings, can solve problems such as affecting the use effect, low VOC content, and easy foaming

Inactive Publication Date: 2021-04-23
WUXI HUADONG ZINDN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The VOC content of water-based polyurethane topcoat is low, but some properties in the heavy-duty anti-corrosion industry cannot meet customer requirements
In addition, the water-based fluorocarbon topcoat in the prior art is prone to foaming in the salt spray test, which affects the use effect

Method used

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  • Water-based fluorocarbon finish paint and preparation method and application thereof
  • Water-based fluorocarbon finish paint and preparation method and application thereof
  • Water-based fluorocarbon finish paint and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 Preparation of water-based fluorocarbon topcoat.

[0020] Component A:

[0021] Table 1

[0022]

[0023] Put components 1-7 into the tank, stir at 800 rpm for 20 minutes, then grind all the materials through a grinder to a fineness below 30 μm, add components 8-11 in turn, stir at 800 rpm for 30 minutes, and Filter and pack with a 200-mesh filter to obtain component A of water-based fluorocarbon coatings.

[0024] B component:

[0025] The water-based isocyanate curing agent is selected from United Curing Chemicals 3598T.

[0026] When in use, mix A and B evenly at a mass ratio of 5:1, then add a small amount of water (8-10wt%) to spray.

[0027] The performance test results of the prepared waterborne fluorocarbon topcoat are shown in Table 1.

Embodiment 2

[0028] Example 2 Preparation of water-based fluorocarbon topcoat.

[0029] Component A:

[0030] Table 2

[0031]

[0032] Put components 1-7 into the tank, stir at 800 rpm for 20 minutes, then grind all the materials through a grinder to a fineness below 30 μm, add components 8-11 in turn, stir at 800 rpm for 30 minutes, and Filter and pack with a 200-mesh filter to obtain component A of water-based fluorocarbon coatings.

[0033] B component:

[0034] Water-based isocyanate curing agent combined curing chemistry 3598T

[0035] When in use, mix A and B evenly at a mass ratio of 5:1 and then add 8-10% of water for spraying.

Embodiment 3

[0046] Example 3 Application of water-based fluorocarbon topcoat.

[0047] The water-based fluorocarbon topcoat prepared in Example 1 is used in conjunction with the water-based cold-sprayed zinc and water-based epoxy mica iron of Wuxi Huadong Zinc Shield, wherein the water-based cold-sprayed zinc is used as a primer, and the water-based epoxy mica iron intermediate paint is used as an intermediate Paint, water-based fluorocarbon topcoat is sprayed as a topcoat for corrosion protection of steel structures. Wherein, the water-based fluorocarbon topcoat in comparative example 1 is Baotashan paint.

[0048] The specific implementation steps are as follows:

[0049] table 5

[0050]

[0051] Table 6

[0052] Test items example 1 Example 2 Contrast 1 Adhesion (MPa) 12 10 12 Impact resistance (g*cm) 50 50 50 water resistant 3500 3300 2000 Salt spray resistance 5000 5500 2000 Resistant to 5% sulfuric acid 7 days pass 7 da...

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Abstract

The invention discloses a water-based fluorocarbon finish paint which comprises a component A and a component B. The component A comprises the following components in parts by weight: 1-5 parts of water-based polyamide wax slurry, 50-65 parts of water-based fluorocarbon emulsion, 0.5-1 part of fumed silica, 15-30 parts of titanium dioxide, 0.2-1 part of DPNB, 0.1-0.6 part of an antifoaming agent, 0.1-0.5 part of a leveling agent, and 5-15 parts of water; the component B is an isocyanate curing agent; and the mass ratio of the component A to the component B is (5-12): 1. The single-layer salt spray resistance of the water-based fluorocarbon finish paint can reach 3000 h or above, the water-based fluorocarbon finish paint has excellent corrosion resistance, the VOC is 85 g / L, emission reduction is obvious compared with 420 g / L of traditional solvent type fluorocarbon finish paint, and a coating matched with water-based cold spray zinc and water-based epoxy intermediate paint has excellent corrosion resistance, neutral salt spray resistance of 5000 h or above and aging resistance of 3000 h or above; the VOC is reduced by more than 80% compared with thetraditional solvent type set, and long-term protection can be provided for the steel structure.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a water-based fluorocarbon topcoat and a preparation method and application thereof. Background technique [0002] Due to its super weather resistance and chemical resistance, fluorocarbon coatings are mainly used as long-life decoration and anti-harsh environment coatings in practical applications. At present, domestic fluorocarbon coatings mainly use organic solvents as the dispersion medium, and a large amount of organic gas will be generated during production and use. With the increasingly stringent national environmental protection requirements, the use of solvent-based coatings is gradually restricted. The VOC content of water-based polyurethane topcoat is low, but some properties in the heavy-duty anti-corrosion industry cannot meet customer requirements. In addition, the water-based fluorocarbon topcoat in the prior art is prone to foaming in the salt spray test, whi...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D5/08C09D7/61B05D1/36B05D7/16B05D7/26
CPCB05D7/16B05D7/26B05D7/58C08K2003/2241C09D5/08C09D127/12C09D7/61C08L77/00C08K3/22C08K3/36
Inventor 杨志华褚路轩周贤辉杨世超陈立庄
Owner WUXI HUADONG ZINDN TECH
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