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A modified polysilazane coating and its preparation method and application method

A polysilazane, modified technology, applied in anti-corrosion coatings, fire-retardant coatings, coatings, etc., can solve the problems of long time and complicated implementation process, and achieve long service life, simple preparation process and good high temperature resistance. Effect

Active Publication Date: 2019-11-26
GUANGZHOU WINHIGH CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the implementation process of this method is cumbersome and takes a relatively long time.

Method used

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  • A modified polysilazane coating and its preparation method and application method

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preparation example Construction

[0041] The present invention also provides a method for preparing a modified polysilazane coating, wherein the modified polysilazane coating is the above-mentioned modified polysilazane coating; the preparation method includes the following steps:

[0042] Add 5-50% polysilazane and 1-30% isocyanate into 20-94% organic solvent and mix evenly.

[0043] It should be noted that the reaction mechanism of the modified polysilazane obtained through isocyanate-modified polysilazane in the present invention is as follows:

[0044]

[0045]Preferably, said mixing comprises stirring mixing and / or ultrasonic mixing.

[0046] It should be noted that, in the mixing process, only a stirrer may be used for stirring and mixing, or only an ultrasonic machine may be used for ultrasonic mixing, or both a stirrer and an ultrasonic machine may be used for ultrasonic mixing.

[0047] Preferably, the stirring rate is 800-3000rpm / min, such as 800rpm / min, 1000rpm / min, 1500rpm / min, 1800rpm / min, 200...

Embodiment 1

[0055] (1) Add 5 parts of methyl, dimethyl polysilazane and 1 part of hexamethylene diisocyanate (HDI) to 20 parts of butyl acetate, and stir for 40 minutes at a stirring rate of 800 rpm / min with a high-speed mixer, Until the mixture is uniform, the modified polysilazane coating modified by isocyanate is obtained.

[0056] (2) The modified polysilazane coating prepared in step (1) was flow-coated on the tinplate panel, and cured at 180° C. for 10 minutes without moisture; then cooled to room temperature to obtain the modified polysilazane coating.

Embodiment 2

[0058] (1) Add 10 parts of perhydropolysilazane and 5 parts of toluene diisocyanate (TDI) to 40 parts of butyl acetate, and use a high-speed mixer to stir at a stirring rate of 1500 rpm / min for 30 minutes until uniformly mixed to obtain Modified modified polysilazane coatings.

[0059] (2) The modified polysilazane coating prepared in step (1) was flow-coated on the tinplate panel, and cured at 190° C. for 12 minutes without moisture; then cooled to room temperature to obtain the modified polysilazane coating.

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Abstract

The invention discloses modified polysilazane paint as well as a preparation method and application method thereof. The modified polysilazane paint is prepared from the following raw materials in parts by weight: 5 to 50 percent of polysilazane, 1 to 30 percent of isocyanate and 20 to 94 percent of organic solvent. The modified polysilazane paint is obtained by modifying the polysilazane via the isocyanate, has good hydrophobic and oleophobic performance, flexibility and binding performance, has good high temperature resistance, abrasion and weather resistance and corrosion resistance, and is long in service life; and the paint is smeared onto a basic material to be cured into a coating at a high temperature without humidity, and the coating has low surface energy and good hydrophobic and oleophobic performance.

Description

technical field [0001] The invention relates to the technical field of paint production, in particular to a modified polysilazane paint and its preparation method and use method. Background technique [0002] As a new type of coating, polysilazane or modified polysilazane can adhere closely to smooth substrates such as metals, minerals, glass, ceramics and organic materials, and the cured film-forming material has high hardness , hydrophobic and oleophobic, anti-corrosion, ultraviolet transparency, thermal stability and heat resistance and other excellent properties, so it has broad application prospects in the fields of hydrophobic, anti-corrosion and anti-fouling, temperature resistance, high-temperature ceramics and non-stick coatings. [0003] Hydrophobic and oleophobic properties are one of the most widely used properties of polysilazanes. The special surface wettability of the surface of the hydrophobic and oleophobic coating makes it have a wide range of application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/16C09D5/08C08G77/62
CPCC08G77/62C08L2205/025C09D5/08C09D5/18C09D183/16C08L83/16
Inventor 王元兵谭伯权罗元章余逊
Owner GUANGZHOU WINHIGH CHEM TECH CO LTD
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