Preparation of uv superhydrophobic polyimide coatings on the surface of wood materials by reaction at room temperature

A water polyimide, wood material technology, applied in the direction of coating, can solve the problems of restriction, flammability, moisture absorption, etc., achieve excellent sealing performance and heat resistance, and solve the effect of high conversion temperature

Inactive Publication Date: 2017-08-22
GUANGDONG YIHUA TIMBER IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because wood materials cannot withstand high temperature, absorb moisture, be flammable, and cannot withstand high temperature heating above 300°C, the preparation of polyimide coating films on the surface of wood materials is severely limited.

Method used

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  • Preparation of uv superhydrophobic polyimide coatings on the surface of wood materials by reaction at room temperature

Examples

Experimental program
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preparation example Construction

[0037] Such as figure 1 Shown, a kind of room temperature reaction preparation can be used for the preparation method of the UV superhydrophobic polyimide coating of wooden material surface, comprises the following steps:

[0038] (1) Add pyromellitic dianhydride, N-methylpyrrolidone, and 4,4'-diaminodiphenyl ether into the stirring tank in sequence, and stir evenly, wherein the weight part of pyromellitic dianhydride is controlled at 15-40 parts, the weight part of N-methylpyrrolidone is controlled at 10-30 parts, and the weight part of 4,4'-diaminodiphenyl ether is controlled at 15-40 parts;

[0039] (2) The system is dispersed at room temperature for 24-48 hours at a speed of 3000-5000r / min;

[0040] (3) Add maleic anhydride and styrene to the above system in sequence to adjust to an appropriate viscosity, wherein the parts by weight of maleic anhydride are controlled at 1 to 10 parts, and the parts by weight of styrene are controlled at 10 to 30 parts;

[0041] (4) The sys...

Embodiment 1

[0046] Embodiment 1: room temperature reaction prepares the preparation method that can be used for the UV superhydrophobic polyimide coating of wooden material surface, comprises the following steps:

[0047] (1) Add 40kg of pyromellitic dianhydride, 10kg of N-methylpyrrolidone, and 36kg of 4,4'-diaminodiphenyl ether into the stirring tank in sequence, and stir;

[0048] (2) The system is dispersed at room temperature for 46 hours at a speed of 3000-5000r / min;

[0049] (3) Then add 1kg of maleic anhydride and 10kg of styrene to the above system in turn to adjust to an appropriate viscosity (coat -4 cups for 15~35 s);

[0050] (4) The system is dispersed at room temperature for 24 hours at a speed of 3000-5000r / min;

[0051] (5) After the reaction is over, slowly add 0.1kg of 1,4-diazabicyclo[2.2.2]octane, 1.8kg of photoinitiator 1-hydroxycyclohexyl phenyl ketone and 1kg of Leveling agent polyether-modified trisiloxane, and finally add 0.1 kg of carbon nanotubes with special...

Embodiment 2

[0052] Embodiment 2: room temperature reaction preparation can be used for the preparation method of the UV superhydrophobic polyimide coating of wooden material surface, comprises the following steps:

[0053] (1) Add 15kg of pyromellitic dianhydride, 30kg of N-methylpyrrolidone, and 15kg of 4,4'-diaminodiphenyl ether into the stirring tank in sequence, and stir;

[0054] (2) The system is dispersed at room temperature for 24 hours at a speed of 3000-5000r / min;

[0055] (3) Then add 1kg of maleic anhydride and 30kg of styrene to the above system in sequence to adjust to an appropriate viscosity (coat -4 cups for 15~35 s);

[0056] (4) The system is dispersed at room temperature for 42 hours at a speed of 3000-5000r / min;

[0057] (5) After the reaction is over, slowly add 0.1kg of 1,4-diazabicyclo[2.2.2]octane, 5kg of photoinitiator 1-hydroxycyclohexyl phenyl ketone and 2kg of fluid under high-speed stirring conditions. Leveling agent polyether modified trisiloxane, and fina...

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Abstract

The invention relates to a UV super-hydrophobic polyimide paint prepared by room temperature reaction and used for a wood material surface and a method. The paint is prepared from the following components: pyromellitic dianhydride, 4, 4'-diaminodiphenyl ether, N-methyl pyrrolidone, maleic anhydride, styrene, a photoinitiator, a leveling agent, 1, 4-diazabicyclo[2.2.2]octane, and a specially shaped carbon nanotube, wherein the photoinitiator is 1-hydroxy cyclohexyl phenyl ketone. According to the invention, room temperature reaction produces polyamic acid, polyamic acid then reacts with polyol to generate unsaturated polyester, also the photoinitiator, the leveling agent, 1, 4-diazabicyclo[2.2.2]octane, carbon nanotube and other raw materials are introduced to make the polyimide paint have super-hydrophobic property, and UV curing is carried out. The coating film applied to the wood material surface can achieve good sealing performance, super-hydrophobicity, temperature resistance, weather resistance and other excellent performance. Combined action of the three can cure polyimide, improve the curing speed and lower the curing temperature.

Description

technical field [0001] The invention relates to a UV superhydrophobic polyimide coating with excellent sealing performance prepared by reaction at room temperature and used on the surface of wooden materials and a preparation method thereof. The invention belongs to the technical field of paint production. Background technique [0002] Polyimide is a class of aromatic heterocyclic polymer compounds with imide functional groups in its molecular structure. It has excellent mechanical properties and a thermal decomposition temperature of 600°C. It is one of the most thermally stable polymers so far. At present, all countries are listing the research, development and utilization of polyimide as one of the most promising polymers in the 21st century. Polyimide, because of its outstanding performance characteristics, whether it is used as a structural material or as a functional material, its huge application prospects have been fully recognized, and it is known as a "problem-sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D7/12C08G73/10
Inventor 闫小星杨如娥徐伟杜安磊吴智慧
Owner GUANGDONG YIHUA TIMBER IND
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