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Preparation method of super-hydrophobic TPU material automobile paint surface protective film self-repairing coating

A car paint and self-repair technology, applied in the field of protective coating and protective film, can solve the problems of lack of development and use, achieve rapid self-healing, prolong self-repair service life, and reduce the effect of residence time

Inactive Publication Date: 2020-12-25
航天思远材料科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the combination of superhydrophobic properties and the self-healing properties of polyurethane materials, and the development of polyurethane self-healing coatings with superhydrophobic properties have important research and industrialization significance in the field of anti-corrosion. At present, the actual development and industrialization of related products at home and abroad The use is relatively lacking

Method used

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  • Preparation method of super-hydrophobic TPU material automobile paint surface protective film self-repairing coating
  • Preparation method of super-hydrophobic TPU material automobile paint surface protective film self-repairing coating

Examples

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Effect test

Embodiment 1

[0034] Embodiment 1: Specifically, the superhydrophobic TPU self-healing coating includes the following raw materials in parts by weight: 100 parts of aliphatic diisocyanate, 500 parts of hydroxyl polyether polyol, 20 parts of catalyst, 30 parts of chain extender, 5 parts of anti-ultraviolet auxiliary agent, 200 parts of solvent, 10 parts of inert silicone oil, 3 parts of nanoparticles modified by sodium citrate, 5 parts of dispersant, and 10 parts of defoamer.

[0035] Wherein, the aliphatic diisocyanate is selected from hexamethylene diisocyanate; the hydroxyl polyether polyol is selected from a hydroxyl polyether polyol with a molecular weight of 1000, and a trihydroxy polyether polyol with a molecular weight of 3000 is mixed in a ratio of 40:10; The catalyst is dibutyltin silicate; the chain extender is 1,4-butanediol; the anti-ultraviolet additive is benzotriazole; the solvent is xylene, butanone, ethyl acetate and tetrahydrofuran according to the ratio of 4:1:4 : 1 ratio...

Embodiment 2

[0045] Embodiment 2: This implementation provides a kind of preparation method of superhydrophobic TPU self-healing coating, and it is basically consistent with embodiment 1, and difference is following difference:

[0046] The superhydrophobic TPU self-healing coating includes the following raw materials in parts by weight: 120 parts of aliphatic diisocyanate, 600 parts of hydroxyl polyether polyol, 30 parts of catalyst, 45 parts of chain extender, 10 parts of anti-ultraviolet auxiliary agent, 200 parts of solvent, 20 parts of inert silicone oil, 5 parts of sodium citrate modified nanoparticles, 5 parts of dispersant, and 15 parts of defoamer.

[0047] Wherein, the aliphatic diisocyanate is selected from isophorone diisocyanate; the hydroxyl polyether polyol is selected from a hydroxyl polyether polyol with a molecular weight of 1000, and a trihydroxy polyether polyol with a molecular weight of 3000 is mixed in a ratio of 45:5; The catalyst is bismuth neodecanoate; the chain ...

Embodiment 3

[0057] Embodiment 3: This implementation provides a kind of preparation method of superhydrophobic TPU self-healing coating, and it is basically consistent with embodiment 1, and difference is following difference:

[0058] The superhydrophobic TPU self-healing coating includes the following raw materials in parts by weight: 110 parts of aliphatic diisocyanate, 500 parts of hydroxyl polyether polyol, 250 parts of catalyst, 40 parts of chain extender, 8 parts of anti-ultraviolet auxiliary agent, 250 parts of solvent, 15 parts of inert silicone oil, 4 parts of sodium citrate modified nanoparticles, 10 parts of dispersant, and 20 parts of defoamer.

[0059] Wherein, the aliphatic diisocyanate is selected from isophorone diisocyanate; the hydroxyl polyether polyol is selected from a hydroxyl polyether polyol with a molecular weight of 1000, and a trihydroxy polyether polyol with a molecular weight of 3000 is mixed in a ratio of 45:5; The catalyst is bismuth naphthenate; the chain ...

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Abstract

The invention discloses a preparation method of a super-hydrophobic TPU material automobile paint surface protective film self-repairing coating, and the automobile paint surface protective film self-repairing coating comprises the following raw materials by weight: 80-120 parts of aliphatic diisocyanate, 500-600 parts of hydroxyl polyether polyol, 20-30 parts of a catalyst, 25-45 parts (preferably 30-40 parts) of a chain extender, 5-10 parts of an anti-ultraviolet auxiliary agent, and 200-250 parts of a solvent. The coating is prepared from the following components in parts by weight: 100 parts of epoxy resin, 10-20 parts of inert silicone oil, 2-5 parts of sodium citrate modified nanoparticles, 5-10 parts of a dispersing agent and 10-20 parts of a defoaming agent. The preparation methodhas the beneficial effects that the synthesized polyurethane belongs to polyether polyurethane and has more soft segment structures, meanwhile, the soft segment structures contain a large number of hydroxyl groups, and migration movement of molecular chains can be realized after film formation, so that conditions are provided for self-repairing after a coating is damaged, and rapid self-healing after the coating is damaged is realized; the nanoparticles modified by sodium citrate can ensure that the protective film has an extremely high water contact angle, thereby ensuring that the coating has a super-hydrophobic characteristic.

Description

technical field [0001] The invention relates to the technical field of protective films and protective coatings, in particular to a method for preparing a self-repairing coating of an automobile paint surface protective film made of superhydrophobic TPU material. Background technique [0002] With the continuous advancement of my country's reform and opening up, the domestic economy has developed rapidly, and the metal industry has also developed by leaps and bounds. The metal substrate industry is related to the national economy and the people's livelihood, and plays a vital role in all areas of people's lives. [0003] However, metal substrates (especially steel substrates) are easily corroded and damaged by corrosive media due to their own characteristics during actual use, thereby affecting their performance, and even causing serious industrial accidents and causing people's lives. Property is threatened. At present, in order to deal with the damage of corrosive media ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/16C09D7/48C09D7/62C09D7/65
CPCC08K2003/2275C08K2201/011C08L2201/08C09D5/1687C09D175/08C08L83/04C08K5/3475C08K9/04C08K3/22
Inventor 张楠刘允公艾成
Owner 航天思远材料科技(上海)有限公司
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