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Self-cleaning superhard polysilazane hydrophobic coating and its preparation and use method

A polysilazane, hydrophobic coating technology, applied in the coating and other directions, can solve the problems of super-hydrophobic coating damage, poor hardness and scratch resistance of super-hydrophobic coating, etc., to overcome easy phase separation, not easy to fall off, reduce The effect of production costs

Active Publication Date: 2020-04-07
BEIJING NEATRITION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness and scratch resistance of the super-hydrophobic coating are poor, which makes the super-hydrophobic coating easy to cause damage.

Method used

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  • Self-cleaning superhard polysilazane hydrophobic coating and its preparation and use method
  • Self-cleaning superhard polysilazane hydrophobic coating and its preparation and use method
  • Self-cleaning superhard polysilazane hydrophobic coating and its preparation and use method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] R in the organic-inorganic hybrid polysilazane of the present embodiment 1 =-CH 3 , R 2 =-HC=CH 2 , which is prepared as a superhydrophobic coating, the method is as follows:

[0046] (1) Mix 12 parts of the above-mentioned organic-inorganic hybrid polysilazanes, 23 parts of hydrophobic acrylate resins, 8 parts of nano-silicon dioxide, and 200 parts of xylene, and evenly coat the mixed solution on a glass slide, and then ℃, humidity 50%, 10 minutes to form a film, 2 hours after the surface is cured, 30 hours after complete curing, you can get a self-cleaning superhard coating.

[0047] (2) Use the GB / T 6739-2006 pencil method to measure the hardness of the paint film. After the coating is cured for 2 hours, its hardness is 8H. After 30 hours of complete curing, its hardness is 9H, and its contact angle is 150°. The rolling angle is 10°, and the coating has good superhydrophobic function. According to GB / T 9286-1998 standard, the adhesion level of the coating is 0, ...

Embodiment 2

[0049] R in the organic-inorganic hybrid polysilazane of the present embodiment 1 =-CH 3 , R 2 =-CF 3 , which is prepared as a superhydrophobic coating, the method is as follows:

[0050] (1) Mix 10 parts of above-mentioned organic-inorganic hybrid polysilazanes, 22 parts of hydrophobic acrylate resins, 7 parts of nano-silica, and 200 parts of xylene, and evenly coat the mixed solution on a glass slide, and in 10 parts ℃, humidity 45%, film formation in 9 minutes, surface curing after 1.8 hours, and complete curing after 26 hours, the self-cleaning superhard coating can be obtained.

[0051] (2) Use the GB / T 6739-2006 pencil method to measure the hardness of the paint film. After the coating is cured for 1.8 hours, the hardness is 8H. After 26 hours of complete curing, the hardness is 9H, and the contact angle is 150° , the rolling angle is 5°, and the coating has a good superhydrophobic function. According to GB / T 9286-1998 standard, the adhesion level of the coating is ...

Embodiment 3

[0053] R in the organic-inorganic hybrid polysilazane of the present embodiment 1 =-H, R 2 =-CH 3 , which is prepared as a superhydrophobic coating, the method is as follows:

[0054] (1) Mix 11 parts of the above-mentioned organic-inorganic hybrid polysilazanes, 24 parts of hydrophobic acrylate resins, 6 parts of nanometer silicon dioxide, and 200 parts of xylene, and coat the mixed solution evenly on a glass slide, and in 20 ℃, humidity 32%, film formation in 8 minutes, surface curing after 1.5 hours, and complete curing after 21 hours, the self-cleaning superhard coating can be obtained.

[0055] (2) Use the GB / T 6739-2006 pencil method to measure the hardness of the paint film. After the coating is cured for 1.5 hours, the hardness is 8H. After 21 hours of complete curing, the hardness is 9H, and the contact angle is 155° , the rolling angle is 8°, and the coating has a good super-hydrophobic function. According to GB / T 9286-1998 standard, the adhesion level of the coa...

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Abstract

The invention discloses a self-cleaning superhard polysilazane hydrophobic coating and a preparation and use method thereof, and belongs to the technical field of super-hydrophobic coatings. The self-cleaning superhard polysilazane hydrophobic coating is prepared from the following components in parts by weight: 5 to 25 parts of organic-inorganic hybridized polysilazane, 15 to 30 parts of hydrophobic acrylate resin, 5 to 15 parts of nanometer silicon dixoide and 40 to 250 parts of organic solvent. The self-cleaning superhard polysilazane hydrophobic coating has the advantages that the excellent superhard, super-hydrophobic, scratch-resistant, abrasion-resistant and high-adhesion properties of a coating are realized; the defects of easiness in cracks, voids and the like in the inorganic polysilazane coating along with the increase of coating thickness are overcome; the problem of low hardness of the organic polysilazane is solved; the coating has the advantages that the hardness is high, the adhesion force is high, the easiness in falling and cracking of the coating is avoided, and the abrasion-resistant and scratch-resistant properties of the coating are ensured; the preparation technology is simple, the implementing is easy, and the preparation technology is suitable for widely popularized and applied.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic coatings, in particular to a self-cleaning superhard polysilazane hydrophobic coating and its preparation and use methods. Background technique [0002] Organosilicon compounds have many excellent physical and chemical properties, and have been widely concerned by people. Polysilazane is an organosilicon compound with Si-N bond as the skeleton. The molecular formula [R 1 R 2 Si-NR 3 ] n Due to its special structure and performance, it is widely used in anti-rust coatings, automotive body coatings, anti-fingerprint coatings, anti-fouling coatings, etc. Polysilazanes are mainly divided into two categories: inorganic polysilazanes (PHPS) and organopolysilazanes (OPSZ). Among them, inorganic polysilazane (PHPS) means that the main chain is Si-N bond, and the side groups are all H atoms, also known as perhydropolysilazane (PHPS), while organopolysilazane (OPSZ) Some of the hydrogen atoms ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D183/10C09D7/61
CPCC08K2201/011C09D7/61C09D133/04C08L83/10C08K3/36
Inventor 肖鹏飞李建军吕钊霞
Owner BEIJING NEATRITION TECH CO LTD
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