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Polyurethane heat-dissipating dustproof coating and 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: 2017-10-17
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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  • Polyurethane heat-dissipating dustproof coating and preparation method and application thereof
  • Polyurethane heat-dissipating dustproof coating and preparation method and application thereof
  • Polyurethane heat-dissipating dustproof coating and preparation method and application thereof

Examples

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preparation example Construction

[0048] 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

[0065] A polyurethane heat-dissipating and dust-proof coating, comprising component A and component B, component A is a mixture of MDI and XDI, the weight of component A is 30.5g, wherein, the -NCO equivalent of component A is 110; component B is 6g and the concentration is 50 % polytetrafluoroethylene aqueous dispersion, the mixture of 100g polyhydric alcohol and 600g solvent, wherein, the particle diameter of polytetrafluoroethylene is 120nm, and solvent is the mixture of 100g ethyl acetate, 200g butyl acetate and 300g ethylene glycol ethyl ether acetate The mixture, 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=8, A is -CH=HC-, R is -CH3.

[0066] 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 the laser radiator was tested for dust p...

Embodiment 2

[0068] A polyurethane heat-dissipating and dust-proof coating, comprising component A and component B, component A is a mixture of MDI and XDI, the weight of component A is 40g, wherein, the -NCO equivalent of component A is 90; component B is 4g and the concentration is 50% The mixture of polytetrafluoroethylene water dispersion liquid, 50g polyhydric alcohol and 300g solvent, wherein, the particle diameter of polytetrafluoroethylene is 120nm, and solvent is the mixture of 100g ethyl acetate, 100g butyl acetate and 100g ethylene glycol ethyl ether acetate , the hydroxyl value of the polyol is 500mgKOH / g, and the polyol is composed of the following components: 35g of PPG and 15gCn f 2n+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 .

[0069] 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 was formed. The dustproof and heat dissipation pe...

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Abstract

The invention discloses a polyurethane heat-dissipating dustproof coating and a preparation method and application thereof. Raw materials of the polyurethane heat-dissipating dustproof coating include a component A and a component B. The component A comprises the following ingredient in parts by weight: 16-75 parts of isocyanate; the component B comprises the following ingredients in parts by weight: 1-3 parts of polytetrafluoroethylene, 40-100 parts of polyhydric alcohols and 300-600 parts of a solvent; the total parts by weight of the isocyanate and the polyhydric alcohols is 90-150; the average particle size of the polytetrafluoroethylene is 120-800 nm; the polyhydric alcohols comprise fluorine-containing dihydric alcohols; and on the basis of the total weight of the polyhydric alcohols, the weight percentage of the fluorine-containing dihydric alcohols is 15-30wt%. By the polyurethane heat-dissipating dustproof coating and the preparation method and application thereof, dust accumulation is reduced, and the problems that the surface heat resistance of a heat sink and the like is increased, the heat conduction coefficient is reduced and the heat transfer efficiency is reduced due to dust blockage are solved.

Description

technical field [0001] The present application relates to the field of coatings, in particular to a polyurethane heat-dissipating and dust-proof 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/08C09D175/06C09D175/14C09D5/16B05D7/14
Inventor 邢哲
Owner HISENSE VISUAL TECH CO LTD
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