Surface coating for automobile aluminum profile part

A technology for surface coatings and aluminum profiles, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of reducing the service life of aluminum profiles, shortening service life, and prone to aging, and improving the toughness of film formation. Strong protective effect, the effect of promoting the upgrading of product performance

Inactive Publication Date: 2020-12-11
MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with iron, aluminum profiles have better corrosion resistance, but as the environment changes, the air contains CO2, SO2, HZS and other gases. When these polluting gases encounter water vapor in the air, they will produce slightly acidic, long-term Erosion by rain and sun, still prone to corrosion
The corrosion phenomenon of aluminum profiles will not only appear on the outside, but will spread to the inside if it is not treated, the corrosion speed is fast, the service life is shortened, and it causes immeasurable hidden dangers and losses
By coating the surface of automotive aluminum profile parts, it can more effectively protect against external scratches and aging corrosion, and improve the service life of auto parts. However, the existing coatings are used on the surface of automotive aluminum profiles for a long time. It is prone to aging and surface cracks. After a long time, it will fall off, oxidize, wear and other phenomena, which will reduce the service life of aluminum profiles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A surface coating for automotive aluminum profile parts, which is made of the following components in parts by weight: 50 parts of water-based polyurethane emulsion, 20 parts of acrylic resin, 0.4 part of modified protective agent, 1.0 part of curing agent, 0.18 part of dispersant, 0.1 parts of defoamer, 0.2 parts of leveling agent, 1.2 parts of titanium dioxide, 1.4 parts of silicon dioxide, and 33 parts of water; the preparation method of the modified protective agent is as follows:

[0023] (1) Put 33 grams of calcined kaolin and 12 grams of talcum powder in a beaker, add 3 times the volume of deionized water, stir and dissolve to obtain a mixed slurry, heat it in a constant temperature water bath at 60°C, and add 7 grams of hydroxyethyl fiber Add element and 0.40 gram of nano-fillers to the slurry, continue stirring at 400 rpm for 20 minutes, and transfer the slurry to a four-necked flask equipped with a stirrer, a condenser, a thermometer and a constant pressure fun...

Embodiment 2

[0038] A surface coating for automotive aluminum profile parts, which is made of the following components in parts by weight: 53 parts of water-based polyurethane emulsion, 22 parts of acrylic resin, 0.5 parts of modified protective agent, 1.1 parts of curing agent, 0.19 parts of dispersing agent, 0.15 parts of defoamer, 0.25 parts of leveling agent, 1.2 parts of titanium dioxide, 1.4 parts of silicon dioxide, and 33 parts of water; the preparation method of the modified protective agent is as follows:

[0039] (1) Put 35 grams of calcined kaolin and 15 grams of talcum powder in a beaker, add 4 times the volume of deionized water, stir and dissolve to obtain a mixed slurry, heat it in a constant temperature water bath at 65°C, and add 8 grams of hydroxyethyl fiber Add element and 0.43 gram of nano-fillers to the slurry, continue to stir for 25 minutes at 430 rpm, and transfer the slurry to a four-necked flask equipped with a stirrer, a condenser, a thermometer and a constant pr...

Embodiment 3

[0054] A surface coating for automotive aluminum profile parts, which is made of the following components in parts by weight: 55 parts of water-based polyurethane emulsion, 25 parts of acrylic resin, 0.6 parts of modified protective agent, 1.2 parts of curing agent, 0.20 parts of dispersing agent, 0.2 parts of defoaming agent, 0.3 parts of leveling agent, 0.09 parts of wetting agent, 1.3 parts of titanium dioxide, 1.8 parts of silicon dioxide, and 35 parts of water; the preparation method of the modified protective agent is as follows:

[0055] (1) Put 36 grams of calcined kaolin and 17 grams of talcum powder in a beaker, add 5 times the volume of deionized water, stir and dissolve to obtain a mixed slurry, heat it in a constant temperature water bath at 70°C, and add 9 grams of hydroxyethyl fiber Element and 0.46 gram of nanofillers are added in the slurry, under 450 rev / mins, continue to stir for 30 minutes, the slurry is transferred in the four-neck flask that agitator, cond...

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Abstract

The invention relates to a surface coating for an automobile aluminum profile part, which takes an environment-friendly waterborne polyurethane emulsion as a basic raw material, and a prepared modified protective agent is added into the coating, so that the film-forming toughness can be improved, the tensile strength is obviously improved, and the binding force of intermolecular bonds is obviouslyenhanced; therefore, the anti-aging performance is correspondingly enhanced; the defects of insufficient adhesive force and no wear resistance of the water-based paint can also be overcome; and the added modified protective agent can obviously enhance the corrosion resistance and wear resistance after curing and film formation, thereby preventing the permeation and diffusion of the water and corrosive medium. The prepared coating has very high chemical stability, corrosion resistance and non-mobility, the corrosion resistance of the surface of the aluminum profile is improved, the prepared water-based paint is different from common solvent type paint, the binding force to the aluminum profile is high, the protective performance cannot be gradually reduced along with prolonging of the service life of the coating, and very wide application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a surface coating for aluminum profile parts of automobiles. Background technique [0002] Aluminum and its aluminum alloys, because of their good physical and chemical properties, as well as the stable, continuous and rapid development of my country's national economy and high-tech, have promoted the rapid development of my country's aluminum smelting and aluminum profile processing industries. my country's industrial aluminum profiles account for about 30% of the total application of aluminum profiles, mainly used in the transportation industry (including automobile manufacturing, rail transit industry), equipment and machinery manufacturing, durable consumer goods industry (including light industry), etc. [0003] Among them, the proportion of aluminum profiles in the automobile manufacturing industry is gradually increasing. Compared with iron, aluminum profiles ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D133/04C09D7/62C09D7/61C09D5/08C09D7/20
CPCC08K2003/2241C08K2003/265C08K2201/005C08K2201/011C08L2205/03C08L2205/035C09D5/08C09D175/04C09D7/20C09D7/61C09D7/62C08L33/04C08K13/06C08K3/346C08K3/34C08K3/26C08K3/22
Inventor 李孙德
Owner MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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