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Dustproof polyurethane coating as well as preparation method and application thereof

A technology of dust-proof paint and polyurethane, applied in the field of paint, can solve the problems such as the pores of the dust cover being easily blocked, unfavorable for the popularization and use of the radiator, hindering the heat dissipation of the radiator, etc., so as to achieve enhanced heat dissipation, good heat conduction and heat dissipation, Enhance water repellency

Inactive Publication Date: 2017-11-07
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, a dust cover is usually used to protect the radiator from dust. The dust cover is provided with fine holes for blocking the dust. The dust cover itself will occupy a certain volume in the projector, and the shape and structure of the projector will be affected. The development has a restrictive effect, and the pores of the dust cover are easily blocked, which hinders the heat dissipation of the radiator
In the prior art, there is also the use of fluorine-containing polyurethane coatings for radiator surface treatment, but in order to ensure the dust-proof and heat-dissipating performance of fluorine-containing polyurethane coatings, the fluorine content in this dust-proof coating is relatively high, which has a negative effect on the performance of the radiator itself. It will have adverse effects, such as damaging the performance of the radiator itself and affecting its heat dissipation, so this kind of dustproof coating is not conducive to the promotion and use of radiators

Method used

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  • Dustproof polyurethane coating as well as preparation method and application thereof
  • Dustproof polyurethane coating as well as preparation method and application thereof
  • Dustproof polyurethane coating as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0043] In order to improve and speed up the preparation of the coating in the examples of the present application and improve the dustproof performance of the coating, the raw materials of the coating in the examples of the present application also include a catalyst, and the weight fraction of the catalyst is 1-4wt% of the total weight fraction of isocyanate and polyol . The catalyst can be selected from one or more of carbamate catalysts, organotin catalysts and bismuth carboxylate catalysts. Wherein, the carbamate catalyst is selected from triethylamine, 1,4-diazobicyclo[2.2.2.]octane (DABCO), N-methylmorpholine, N-ethylmorpholine, N,N, One or more mixtures of N',N'-tetramethylhexamethylenediamine and 1,2-dimethylimidazole. The organotin catalyst is selected from one of tin(II) acetate, tin(II) octoate, tin(II) laurate, dibutyltin dilaurate, dibutyltin dimaleate, dioctyltin diacetate and dibutyltin dichloride species or a mixture of several species. The bismuth carboxyla...

Embodiment 1

[0059] A kind of polyurethane dustproof coating, comprises component A and component B, and component A is the mixture of MDI and XDI, and the weight of component A is 30g, and wherein, the -NCO equivalent of component A is 110; Component B is 3g nanometer hexagonal boron nitride , 0.8g nano-titanium tetranitride, 100g polyhydric alcohol and the mixture of 500g solvent, wherein, the particle diameter of nano-hexagonal boron nitride is 800nm, the nano-titanium tetranitride particle diameter is 30nm, solvent is 400g ethyl acetate, 50g The mixture of butyl acetate and 50g ethylene glycol ethyl ether acetate, the hydroxyl value of the polyol is 170mgKOH / g, and the polyol is composed of the following components: 85g of PPG and 15gC n f 2n+1 -A-CH 2 OCH 2 -C(CH 2 Oh) 2 -R, n=10, A is -CH=HC-, R is -CH3.

[0060] Components A and B were mixed and sprayed on the surface of the laser radiator, dried at 100°C for 30 minutes to form a 30-micron coating, and the sprayed surface of th...

Embodiment 2

[0062] A kind of polyurethane dustproof paint, comprises component A and component B, and component A is the mixture of MDI and XDI, and the weight of component A is 40g, and wherein, the -NCO equivalent of component A is 90; Component B is 2g nanometer hexagonal boron nitride , the mixture of 2g nano titanium tetranitride, 50g polyhydric alcohol and 500g solvent, wherein, the particle diameter of nano hexagonal boron nitride is 400nm, the nano titanium tetranitride particle diameter is 800nm, solvent is 100g ethyl acetate, 200g acetic acid A mixture of butyl ester and 200g ethylene glycol ether acetate, the hydroxyl value of the polyol is 500mgKOH / g, and the polyol is composed of the following components: 35g of PPG and 15g C n f2n+1 -A-CH 2 OCH 2 -C(CH 2 Oh) 2 -R, n=20, A is -CH 2 -CH 2 -, R is -CH 2 CH 3 .

[0063] Components A and B were mixed and sprayed on the surface of the heat sink of the driver board. After drying at 90°C for 60 minutes, a 15-micron coating w...

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Abstract

The invention discloses a dustproof polyurethane coating as well as a preparation method and an application thereof. The dustproof polyurethane coating is prepared from an ingredient A and an ingredient B, wherein the ingredient A is prepared from components in parts by weight as follows: 14.5-75 parts of isocyanate; the ingredient B is prepared from components in parts by weight as follows: 2-5 parts of heat-dissipating components, 500-800 parts of a solvent and 40-100 parts of polyols, and polyols and isocyanate account for 90-150 parts by weight totally; the heat-dissipating components comprise nano hexagonal boron nitride and nano tri-titanium tetranitride and have the average particle size ranging from 30 nm to 800 nm; polyols comprise fluorine-containing dihydric alcohol which accounts for 15wt%-30wt% of the total weight of polyols. According to the dustproof polyurethane coating as well as the preparation method and the application thereof, accumulation of dust is reduced, and the problems that the surface thermal resistance of a radiator and the like is larger, the heat conductivity coefficient is reduced and the heat transfer efficiency is reduced as a result of dust blocking are solved.

Description

technical field [0001] The application relates to the field of coatings, in particular to a polyurethane dustproof coating, its preparation method and its application. Background technique [0002] A projector, also known as a projector, is a device that projects or reflects images or videos onto a screen through digital light processing technology or LCD (Liquid Crystal Display, liquid crystal display) liquid crystal imaging technology. Projectors are widely used in education, business, engineering, family and other places, and in the projectors used in industrial and mining enterprises, military, education and other industries, because they require high brightness and long-term operation, higher requirements are placed on heat dissipation performance. [0003] The heat dissipation of the projector mainly depends on the radiator. Usually, the heat from the heat-generating components in the projector is transferred to the radiator, and the heat is dissipated through the radi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/14C09D175/08C09D7/12C08G18/66C08G18/48C08G18/67C08G18/32C08K3/38C08K3/28G03B21/16
CPCC08G18/3812C08G18/4825C08G18/6666C08G18/6775C08K3/28C08K3/38C08K2003/385C08K2201/011C09D175/04C09D175/08C09D175/14G03B21/16
Inventor 邢哲
Owner HISENSE VISUAL TECH CO LTD
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