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High-hardness coating material for aluminum alloy protection and preparation method and application thereof

A coating material and high-hardness technology, applied in anti-corrosion coatings, coatings, polyurea/polyurethane coatings, etc., can solve the problems of high brittleness of the coating, the hardness cannot meet the requirements of scratch resistance, and the limitation of the use field. The effect of improved flexibility, improved protection, good abrasion resistance

Inactive Publication Date: 2020-04-10
云南昆船机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating prepared by this method has a certain high hardness and water resistance, but the hardness cannot meet the requirements of the mechanical industry for scratch resistance, and the coating is brittle and the application field is limited.

Method used

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  • High-hardness coating material for aluminum alloy protection and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a high-hardness coating material for surface protection of aluminum alloy substrates, which is prepared by the following steps:

[0025] (1) Under microwave conditions, add 50 g of dimethyl carbonate diluent and 10 g of nano-SiO to a four-necked flask 2 Sol, add 15g of 2,4-toluene diisocyanate (TDI) with stirring at room temperature, raise the temperature to 80°C, slowly add 20g of dehydrated polypropylene glycol 1000 (PPG-1000) dropwise within 0.5h, react for 2h, drop Add 5.0g of perfluorophenol and continue the reaction for 2h to form prepolymer I.

[0026] (2) Cool down the temperature of prepolymer I to 50°C, then add 20g of 2,2-dimethylolpropionic acid (DMPA) required for the experiment according to the content of water-based groups, and then quickly raise the temperature to 80°C for 2 hours to form a polymer II.

[0027] (3) Cool down the temperature of the polymer II to 50°C, then add 5g of acid red B according to the amount of free -NC...

Embodiment 2

[0031]This embodiment provides a high-hardness coating material for surface protection of aluminum alloy substrates, which is prepared by the following steps:

[0032] (1) Under microwave conditions, add 100g of dimethyl carbonate and 10g of nano-SiO to a four-necked flask 2 Sol, add 15g of 2,4-toluene diisocyanate (TDI) with stirring at room temperature, raise the temperature to 80°C, slowly add 20g of dehydrated polypropylene glycol 1000 (PPG-1000) dropwise within 0.5h, react for 2h, drop Add 5.0g of perfluorophenol and continue the reaction for 2h to form prepolymer I.

[0033] (2) Cool down the temperature of the prepolymer I to 50°C, then add 25g of 2,2-dimethylolpropionic acid (DMPA) required for the experiment according to the water-based group content, and then rapidly raise the temperature to 80°C for 2 hours to form a polymer II.

[0034] (3) Cool polymer II to 50°C, then add 10g of acid red B according to the amount of free -NCO remaining in the reaction system, r...

Embodiment 3

[0038] This embodiment provides a high-hardness coating material for surface protection of aluminum alloy substrates, which is prepared by the following steps:

[0039] (1) Under microwave conditions, add 60g of diluent ethanol and 10g of nano-SiO to a four-neck flask 2 Sol, add 15g of 2,4-toluene diisocyanate (TDI) with stirring at room temperature, raise the temperature to 80°C, slowly add 20g of dehydrated polypropylene glycol 1000 (PPG-1000) dropwise within 0.5h, react for 2h, drop Add 5.0g of perfluorophenol and continue the reaction for 2h to form prepolymer I.

[0040] (2) Cool down the temperature of the prepolymer I to 50°C, then add 36g of 2,2-dimethylolpropionic acid (DMPA) required for the experiment according to the water-based group content, and then rapidly raise the temperature to 80°C for 2 hours to form a polymer II.

[0041] (3) Cool down the temperature of the polymer II to 50°C, then add 20g of acid red B according to the amount of free -NCO remaining in...

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Abstract

The invention discloses a high-hardness coating material for aluminum alloy protection and a preparation method and application thereof, and aims to provide a high-hardness coating material for aluminum alloy protection with a high protection effect and a preparation method and application thereof. The coating material is prepared from the following components: a fluorinated polyurethane type highpolymer material, an organic solvent, fluorinated graphene, tetrafluoroethylene dispersion liquid and polyimide fibers; wherein the percentage (mass) of the fluorinated polyurethane type high polymermaterial, the organic solvent, the fluorinated graphene, the tetrafluoroethylene dispersion liquid and the polyimide fibers is (25-50): (25-35): (5-10): (19.5-30.5): (0.5-2.5). The coating material has good comprehensive properties such as wear resistance, waterproofness and scratch resistance, and the surface protection effect of the aluminum alloy base material can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a high-hardness coating material for aluminum alloy protection, a preparation method and an application. Background technique [0002] Aluminum and aluminum alloys are the most widely used metal materials among non-ferrous metals. Because aluminum alloy materials have a series of excellent physical, chemical, mechanical and processing properties, but aluminum alloys are not ideal in some properties, such as surface properties such as hardness, wear resistance and corrosion resistance, and the corrosion potential of aluminum is relatively negative. , the overall corrosion is more serious, and the galvanic corrosion is particularly prominent when it is in contact with other metals. In order to overcome the shortcomings of aluminum alloy surface properties, expand the application range and prolong the service life, anodic oxidation and polymer coating are the two most c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D127/18C09D5/08C09D7/61C09D7/65C08G18/10C08G18/66C08G18/48C08G18/83C08G18/34
CPCC08G18/10C08G18/4825C08G18/6692C08G18/833C08K2201/011C08L2205/03C08L2205/16C09D5/08C09D127/18C09D175/08C09D7/61C09D7/65C09D7/70C08L27/18C08L79/08C08K3/042C08K3/36C08L75/08C08G18/348
Inventor 蒋谷峰唐楷李春雷赵一钢彭明霞旃碧辉
Owner 云南昆船机械制造有限公司
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