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A kind of anti-oxidation coating for color-coated board surface and preparation method thereof

An anti-oxidative coating and color-coated board technology, applied in the field of coatings, can solve problems such as cracking of color-coated boards, reduced service life, potential safety hazards, etc. Effect

Active Publication Date: 2020-05-22
浙江大瑞漆业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In areas with high humidity and high temperature, especially under high-intensity outdoor sunlight, some color-coated steel coatings will self-oxidize due to absorption of ultraviolet rays, resulting in polymer degradation. Other coatings added with light stabilizers, due to the mixing of components When the coating is uneven or incompletely melted, the coating will fade after being irradiated by ultraviolet rays, and the coating of the seriously aged color-coated plate will begin to crack, pack and finally fall off, so that the metal plate will be exposed, corroded and rusted, and the service life It is greatly reduced, and the exposed metal plate may be connected to electricity, which brings serious safety hazards

Method used

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  • A kind of anti-oxidation coating for color-coated board surface and preparation method thereof
  • A kind of anti-oxidation coating for color-coated board surface and preparation method thereof
  • A kind of anti-oxidation coating for color-coated board surface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The synthesis method of arylamine curing agent is: add 1mol bis(2-aminophenyl) disulfide, 0.01mol 4-dimethylaminopyridine and 5ml solvent tetrahydrofuran into the reaction flask, stir at room temperature until the raw materials are completely dissolved, and then Add 1 mol of 2-pyridinecarbonyl chloride dropwise in an ice bath. After the dropwise addition, react at room temperature for 80 minutes, remove the solvent by rotary evaporation, and use column chromatography with dichloromethane:petroleum ether=2:5 as the chromatographic solution to obtain the formula a Structure of aromatic amine curing agent:

[0036]

[0037] Detected by GC-MS: aromatic amine curing agent a (C 18 h 15 N 3 OS 2 ) has a molecular weight of 352.962;

[0038] Antioxidant is obtained by addition of anthocyanidin 2 and terephthalic acid and p-phenylenediamine, and the molar ratio of described anthocyanidin, terephthalic acid and p-phenylenediamine is 2:2.5-3: 1; The synthesis method of ant...

Embodiment 2

[0042] No antioxidants added:

[0043] The weight of each raw material of anti-oxidation coating is: 60g of epoxy resin, 10g of urea melamine resin, 6g of polytetrafluoroethylene, 4g of diabase powder, 3g of porcelain powder, 1g of corundum, 4g of composite curing agent, 0.5g of curing accelerator, Triol 5.5g, dioxypropylene ethyl ether 6g;

[0044] A preparation method for an anti-oxidation coating on the surface of a color-coated plate, specifically comprising the following steps:

[0045] S1, dispersion grinding

[0046] Add epoxy resin, diabase powder, porcelain powder, carborundum and glycerol into a high-speed disperser for dispersion, and then pass through a ball mill for grinding through an 80-mesh sieve;

[0047] S2, melting and solidification

[0048]Add the sieved mixture into the screw extruder, then add urea melamine resin, polytetrafluoroethylene, composite curing agent and curing accelerator, the screw extruder host speed is 45Hz, the feeding speed is 25Hz, a...

Embodiment 3

[0050] No modification of epoxy resin and no addition of antioxidants:

[0051] The weight of each raw material of the anti-oxidation coating is: epoxy resin 70g, diabase powder 5g, porcelain powder 5g, corundum 2g, glycerin 10g, dioxypropylene ethyl ether 8g;

[0052] A preparation method for an anti-oxidation coating on the surface of a color-coated plate, specifically comprising the following steps:

[0053] S1, dispersion grinding

[0054] Add epoxy resin, diabase powder, porcelain powder, carborundum and glycerol into a high-speed disperser for dispersion, and then pass through a ball mill for grinding through an 80-mesh sieve;

[0055] S2, melting and solidification

[0056] Add the sieved mixture into the screw extruder, then add urea melamine resin, polytetrafluoroethylene, composite curing agent and curing accelerator, the main engine speed of the screw extruder is 40Hz, the feeding speed is 30Hz, extrude The temperature is 85°C in the first zone, and 160°C in the ...

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Abstract

The invention discloses an antioxidation paint used for surface of color-coated sheet and a preparation method thereof. The antioxidation paint comprises the following raw materials by weight percentage: 50-70% of epoxy resin, 10-15% of urea formaldehyde melamine resin, 5-10% of polytetrafluoroethylene, 3-6% of diabase powder, 2-5% of porcelain powder, 1-3% of corundum, 4-6 % of a composite curingagent, 0.5-1.3% of a curing accelerator, 4-8% of an anti-oxidant, 5-10% of glycerol, and 5-10% of diepoxypropane ethyl ether; epoxy resin is modified and cured under effect of the composite curing agent and the curing accelerator through urea formaldehyde melamine resin and polytetrafluoroethylene, and the anti-chemical performance, intensity and oxidation resistance of epoxy resin are increased;an anti-oxidant in the paint component can effectively capture the free radical generated by oxidative degradation under ultraviolet ray irradiation, a chain reaction of the free radical is prevented, the antioxidation performance of the paint is increased, the method has convenient operation, and is suitable for commercialized production.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an anti-oxidation coating used on the surface of a color-coated board and a preparation method thereof. Background technique [0002] Color-coated sheet, also known as color-coated sheet or pre-coated sheet, is a composite material with an organic coating. It uses cold-rolled steel sheet and galvanized steel sheet as the Processing), a product made by applying paint in a continuous method (roller coating method), baking and cooling. Because of its good decoration, energy saving and environmental protection, easy forming, and low cost, its application has gradually expanded from the construction field to the home appliance field in recent years, and it is often used in TV sets, refrigerator back panels, etc. [0003] In areas with high humidity and high temperature, especially under high-intensity outdoor sunlight, some color-coated steel coatings will self-oxidize d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/61C09D7/63C09D7/65C08G59/50C07D311/60
CPCC07D311/60C08G59/506C08K2201/014C08L2201/08C08L2205/03C09D7/61C09D7/63C09D7/65C09D163/00C08L61/30C08L27/18C08K13/02C08K3/34C08K3/00C08K5/20
Inventor 刘奕君何文霞陈晓玲
Owner 浙江大瑞漆业科技有限公司
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