Anti-icing and anti-frosting polyurethane coating and preparation method thereof

A polyurethane coating and anti-frosting technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor mechanical properties of film-forming substances, low adhesion to substrates, limitations, etc., achieve good hydrophobicity, improve hydrophobicity resistance, the effect of inhibiting the formation of initial frost crystals

Active Publication Date: 2012-10-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the extremely poor mechanical properties of the film-forming substance used in...

Method used

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  • Anti-icing and anti-frosting polyurethane coating and preparation method thereof
  • Anti-icing and anti-frosting polyurethane coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) At room temperature (25°C), 10 grams of ethylene-chlorotrifluoroethylene copolymer diol (number-average molecular weight is 1000), 10 grams of hydroxyl-terminated polydimethylsiloxane (number-average molecular weight is 1000), Add 30 grams of polyether diol (number average molecular weight is 1000), 10 grams of 2,4-toluene diisocyanate into the reaction kettle, heat up to 60°C, react for 3 hours, then add 1 gram of 1,4-butanediol , reacted for 2 hours, and discharged to obtain fluorine-containing silicon polyurethane resin.

[0034] (2) Get 20 grams of the above-mentioned fluorine-containing silicon polyurethane resin, 40 grams of ethyl acetate, 0.2 grams of 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 0.2 grams of organic bentonite and 0.3 g of polyacrylate was stirred to prepare a mixed solution. Add 3 grams of γ-mercaptopropyltrimethoxysilane to the mixed solution and stir, then add 1 gram of silicon oxide with a particle size of 10 nm to 20 nm, and 5 grams of titaniu...

Embodiment 2

[0037](1) At room temperature, 15 grams of polyperfluoroethylene propylene glycol (number average molecular weight is 2500), 20 grams of hydroxyl-terminated polydimethylsiloxane (number average molecular weight is 2500), 35 grams of polyether glycol (Number average molecular weight is 2500), 17.5 grams of 4,4'-diphenylmethane diisocyanate was added to the reaction kettle, the temperature was raised to 75°C, and reacted for 4 hours, then 5.5 grams of diethylene glycol was added and reacted for 3 hours , and the fluorine-containing silicon polyurethane resin is obtained by discharging.

[0038] (2) Take 32.5 grams of the above-mentioned fluorine-containing silicon polyurethane resin, 45 grams of propylene glycol methyl ether propionate, 0.6 grams of 3,6-dimethyl-4-octyne-3,6-diol, 0.6 grams of modified polyamide Wax powder and 0.65 g of fluorine-modified polyacrylate were stirred to prepare a mixed solution. Add 6.5 grams of 3-glycidyl etheroxypropyltrimethoxysilane to the abov...

Embodiment 3

[0041] (1) At room temperature, 20 grams of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer diol (number-average molecular weight is 4000), 30 grams of hydroxyl-terminated polydimethylsiloxane (number-average molecular weight is 4000) , 40 gram polyether diols (number-average molecular weight is 4000), 25 gram xylylene diisocyanates join in the reactor, be warming up to 90 ℃, react for 5 hours, then add 10 gram neopentyl glycol, react After 4 hours, the fluorine-containing silicon polyurethane resin was obtained by discharging.

[0042] (2) Take 45 grams of the above-mentioned fluorine-containing silicon polyurethane resin, 50 grams of methyl isobutyl ketone, 1 gram of 3,5-dimethyl-1-hexyn-3-ol, 1 gram of zinc ricinoleate, 1 gram of The phosphate-modified polyacrylate is stirred and prepared into a mixed solution. Add 10 grams of 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane to the above mixed solution and stir, then add 10 grams of titanium dioxide with a particle siz...

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Abstract

The invention belongs to the fields of aerospace, low temperature refrigeration and heat pump air-conditioning and relates to an anti-icing and anti-frosting polyurethane coating and a preparation method thereof. The anti-icing and anti-frosting polyurethane coating has good film forming properties, low temperature resistance and high hydrophobicity. The preparation method comprises that based on weight parts of a fluorosiloxane-containing polyurethane resin, 20 to 45 parts by weight of the fluorosiloxane-containing polyurethane resin, 40 to 50 parts by weight of one or more organic solvents, 0.2 to 1 part by weight of one or more defoamers, 0.2 to 1 part by weight of one or more anti-settling agents and 0.3 to 1 part by weight of one or more flatting agents are mixed into a mixed solution; 3 to 10 parts by weight of one or more silane coupling agents, 1 to 10 parts by weight of nanoscale inorganic oxide particles and 5 to 10 parts by weight of titanium dioxide are added into the mixed solution; and the mixture is subjected to ball-milling to form the anti-icing and anti-frosting polyurethane coating. Through utilization of the fluorosiloxane-containing polyurethane resin, the anti-icing and anti-frosting polyurethane coating has good adhesion with a base and has good surface hydrophobicity.

Description

technical field [0001] The invention belongs to the energy-saving fields of aerospace, low-temperature refrigeration, and heat pump air-conditioning, and relates to a coating with good film-forming properties, low-temperature resistance and high hydrophobicity, and further relates to a polyurethane coating that can effectively prevent freezing and frosting and a preparation method thereof. Background technique [0002] The phenomenon of icing and frosting on cold surfaces widely exists in aviation, low temperature refrigeration, heat pump air conditioning and other fields. The existence of the frost layer will reduce the heat transfer efficiency of the equipment and increase the pressure loss, which will have a great impact on the system, and even cause the system to fail. For the aerospace field, it will bring flight safety problems to the aircraft. Therefore, this type of equipment needs to perform deicing and defrosting operations regularly or irregularly, which brings a ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/61C08G18/62
Inventor 王旭朋宋延林王京霞王健君
Owner INST OF CHEM CHINESE ACAD OF SCI
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