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Special primer-topcoat polyurea protection coating for automobile chassis system and preparation method

A technology for automotive chassis and protective coatings, applied in the direction of polyurea/polyurethane coatings, epoxy resin coatings, coatings, etc., can solve the problems that cannot meet the needs of industrial production line operations, the thickness of the coating film cannot exceed 50 μm, and the frame cannot be used for a long time. Effective protection and other issues to achieve the effect of enhancing market competitiveness, improving the overall coating level, and high construction efficiency

Active Publication Date: 2017-12-08
湘江涂料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN102796451A discloses a long-acting anti-corrosion, weather-resistant, ultra-fast-drying coating and its preparation method and application. It uses polyaspartic coating to improve the prior art. However, the coating film thickness of the coating cannot exceed 50 μm, and the coating must be used after On the treated steel, it is not possible to make a bottom-surface one-in-one coating, and the salt spray resistance time of the coating is only 500h, which cannot provide long-term protection for the frame
[0004] CN104893523A discloses a very low VOC self-drying polyaspartic coating for construction machinery, which is to apply polyaspartic acid ester coating to construction machinery to improve the prior art, but the salt spray resistance of the coating is 720h, No substantial improvement over existing technologies
[0005] CN105462484A discloses a high-solid polyaspartic acid ester weather-resistant bottom surface integrated anti-corrosion coating, which is to improve the prior art with polyaspartic acid ester coating to replace the existing bottom surface integrated coating, but the hard work of the coating The time is 10h, which cannot meet the assembly line operation of industrial production. At the same time, the QUV aging resistance time of the coating is 1000h, which is not much improved compared with existing products

Method used

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  • Special primer-topcoat polyurea protection coating for automobile chassis system and preparation method
  • Special primer-topcoat polyurea protection coating for automobile chassis system and preparation method
  • Special primer-topcoat polyurea protection coating for automobile chassis system and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0049] Examples 1-3 of a kind of bottom-surface-integrated polyurea protective coating for automobile chassis system

[0050] The parts by weight of each raw material are as shown in Table 1:

[0051] Table 1 The parts by weight of the raw materials in Examples 1-3 of a special bottom-surface-integrated polyurea protective coating for automobile chassis systems

[0052]

[0053]

[0054] Note: "-" in the table means not added.

Embodiment 1

[0056] (1) The preparation method of component A: According to the weight parts of the raw materials described in Example 1 in Table 1, first add isocyanate and polysulfide modified epoxy resin into the reaction kettle, stir and heat at a constant speed to 83 at 180r / min ℃, heat preservation reaction for 4 hours, until the mass percentage of isocyanate reached 14.5%, cooled to 48 ℃, then added diluent, and stirred at 120r / min for 35min to obtain component A;

[0057] (2) The preparation method of component B: according to the parts by weight of the raw materials described in Example 1 in Table 1, first mix part of the aliphatic synthetic hindered amine polyurea resin with coloring pigments, fillers, organic zinc, dispersants, anti-settling agents, After mixing the defoamer and part of the solvent, disperse at 800r / min for 40min, and then use a basket sand mill to grind to a fineness of ≤15μm to obtain a slurry, and then add the remaining aliphatic synthetic hindered amine to th...

Embodiment 2

[0060] (1) The preparation method of component A: according to the weight parts of the raw materials described in Table 1, Example 2, first add isocyanate and polysulfide modified epoxy resin into the reaction kettle, stir and heat at a constant speed to 80 at 140r / min ℃, heat preservation reaction for 3 hours, until the mass percentage of isocyanate reached 16%, cooled to 50 ℃, then added diluent, and stirred at 100r / min for 50min to obtain component A;

[0061] (2) The preparation method of component B: according to the parts by weight of the raw materials described in Example 2 of Table 1, first mix part of the aliphatic synthetic hindered amine polyurea resin with coloring pigments, fillers, organic zinc, dispersants, anti-settling agents, After mixing the defoamer and part of the solvent, disperse for 45 minutes at 1000r / min, and then use a basket sand mill to grind to a fineness of ≤17μm to obtain a slurry, and then add the remaining aliphatic synthetic hindered amine to ...

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Abstract

The invention discloses a special primer-topcoat polyurea protection coating for an automobile chassis system and a preparation method. The coating is prepared from a component A and a component B in a volume ratio of 1:(2-4), wherein the component A comprises isocyanate, a poly-sulfide modified epoxy resin and a diluent; the component B comprises an aliphatic synthetic hindered amine polyurea resin, a coloring pigment, a filler, graphene pulp, organic zinc, a dispersing agent, an ultraviolet absorbent, an ultraviolet light stabilizer, an anti-settling agent, a leveling agent, a defoaming agent, extinction powder and a dissolvent. The invention further discloses a preparation method of the special primer-topcoat polyurea protection coating for the automobile chassis system. The thickness of a disposable coating membrane is greater than or equal to 80mu m, a coating membrane is rapid in drying speed and high in construction efficiency, a coated layer is good in adhesion to a substrate, good in impact resistance, free of color change in long-term outdoor exposure, very good in aging resistance, salt mist resistance and medium resistance, high in product solid content and good in environmental friendliness, and the method provided by the invention is simple in process, low in cost and applicable to industrial production.

Description

technical field [0001] The invention relates to a polyurea protective coating and a preparation method thereof, in particular to a bottom-surface-integrated polyurea protective coating and a preparation method for an automobile chassis system. Background technique [0002] With the increasing production of automobiles, from the perspective of production efficiency, the current automobile factory's chassis system, including the frame, rear axle, leaf spring, drive shaft and other components, uses epoxy acrylic electrophoretic coatings, or environmental coatings. Oxyacrylic acid bottom and surface all-in-one paint, but the above-mentioned paint has poor aging resistance, and the salt spray resistance of the paint film will plummet after the film is pulverized. Some cars are still in the company's finished product warehouse, and the chassis system has serious defects such as pulverization and corrosion. Some exported cars have been transported by sea, and the chassis system has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D163/00C09D7/12
CPCC08L2205/02C08L2205/035C09D175/02C08L63/00C08L83/12C08L33/04C08L27/12C08L83/04C08K13/02C08K3/04C08K3/34C08K3/346C08K3/30C08K5/56
Inventor 曹树印周庆军李超龙凯张正东
Owner 湘江涂料科技有限公司
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