CN103600549A - Aircraft radome leading edge assembly - Google Patents
Aircraft radome leading edge assembly Download PDFInfo
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- CN103600549A CN103600549A CN201310515960.7A CN201310515960A CN103600549A CN 103600549 A CN103600549 A CN 103600549A CN 201310515960 A CN201310515960 A CN 201310515960A CN 103600549 A CN103600549 A CN 103600549A
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Abstract
An aircraft radome leading edge assembly comprises a radome leading edge shell and an anti-icing coat positioned outside the shell, the anti-icing coat comprises a primer and a finish, the primer is an epoxy modified alkyd resin primer, and the finish is an organosilicon modified acrylate coating; the thicknesses of the dry films of the primer and the finish are 24mum and 42mum respectively; and the organosilicon modified acrylate coating comprises 55-65wt% of an organosilicon modified acrylic resin, 20-25wt% of a color filler, 3wt% of nanometer calcium carbonate, 3wt% of nanometer aluminum oxide, 1wt% of a leveling agent, 0.8wt% of an antifoaming agent, 1.2wt% of a dispersant, 0.5wt% of a catalyst and 3-5wt% of a solvent. The radome leading edge assembly made in the invention can effectively reduce the formation of ice layers on the leading edge of a radome, and is in favor of the shedding of formed ice layers.
Description
Technical field
The present invention relates to a kind of aircraft radome leading edge assembly.
Background technology
The world today, aircraft becomes the vehicles of people's pay attention to day by day gradually due to its quick, safe feature.But while flying when aircraft is freezing meteorological condition with the subsonic speed that is less than a certain critical Mach number under, the surface windward of some parts will be because of the droplets impact its in atmosphere, gather and freeze, cowl lip for example.A large amount of accidents and research all show, even the accumulated ice of aircraft key position, a small amount of, also can cause the lift of aircraft to decline, and flight resistance increases, thereby cause the deterioration of the pneumatic qualities such as the maneuverability of aircraft and stability.Especially aero-engine is under ground and aerial certain humiture, and air inlet radome fairing and support plate are prone to icing.Owing to freezing, will cause inlet flow field distortion, engine performance is worsened; Ice comes off and also may cause engine blade fracture, even causes fatal crass's major accident.Especially large aircraft, has the features such as high thrust, large Gross Weight Takeoff, subsonic speed, strong viability (all-weather flight) as large-scale Dakota, and this has just determined that this class aircraft inevitably exists aloft ice formation issues.Therefore carrying out aircraft research icing and guard technology is that aircraft, especially large transport airplane are developed very important importance, significant to flight safety.
Different parts for aircraft, current anti-/ de-icing method is as follows: the (1) hot air anti-icing system of engine compressor bleed: be mainly used in the anti-icing of wing, empennage leading edge and engine inlets lip and air inlet component, heating by hot gas makes the temperature of protection coating reach the evaporating temperature of super-cooling waterdrop under ice-formation condition, thereby avoids super-cooling waterdrop to freeze in icing shallow freezing.(2) cycle gasbag-type deicing system: utilize engine bleed to supply with air bag pneumatic channel, make it periodically expand or shrink, destruction ice sheet and surperficial adhesion, then in the effect of aerodynamic force, be issued to the object of deicing.Be mainly used in the deicing of wing, empennage leading edge, the bleed needing is little a lot of compared with hot air anti-icing system, when anti-icing hot gas undersupply, can be used as alternative icing safeguard procedures.Electric heating anti-/ deicing system: both sustainable heating played anti-ice action, can heat as deicing system in the cycle again.Be mainly used in the prevent/deicing of propeller blade, rectification calotte and windscreen.Except above-mentioned electric heating system, the electricity of low energy consumption is scolded deicing, Electro-Impulse De-icing and other novel prevent/de-icing method, as ultrasonic wave, marmem and high-frequency electronic deicing etc. also can be used as the anti-icing replacement scheme of bleed, the key technology of these schemes, still in exploitation and experimental stage, needs in use further to verify its feasibility and reliability.
Except above-mentioned these initiatively the method for deicing, also extensively adopt in the world at present in easily the freeze method of position application low-surface-energy hydrophobic coating of aircraft and play the effect of passive anti-deicing.Be coated in the low surface energy coat of body surface except reducing super-cooling waterdrop in the degree of condensing of body surface, when aircraft passes through heating active deicing, can also make body surface ice sheet melt the water droplet forming and depart from as early as possible body, thereby prevent from heavily freezing.The relatively aforementioned several method of method of this application low-surface-energy hydrophobic coating have cost low, consume energy little, realize the features such as difficulty is low, be the anti-deicing supplementary means of a kind of very important aircraft surfaces.But the performance of current most of low-surface-energy hydrophobic coatings still can not meet the safety requirements of the anti-deicing of aircraft surfaces completely.
Summary of the invention
Therefore the present invention aims to provide a kind of cowl lip assembly, and its base house skin comprises organosilicon modified crylic acid resin ice-phobic coating, can effectively reduce the formation of ice sheet on cowl lip, and the coming off of the ice sheet that is conducive to form.
Particularly, a kind of cowl lip assembly, comprises cowl lip housing and the ice-phobic coating that is positioned at hull outside, and this ice-phobic coating comprises priming paint and finish paint, and described priming paint is that epoxy Modified Alkyd Resin Primer, finish paint are organic silicone modified acrylate coating material; The build of priming paint and finish paint is respectively 24 microns and 42 microns; Described organic silicone modified acrylate coating material comprises: by weight, and organosilicon modified crylic acid resin 55-65%, color filler 20-25%, nano-calcium carbonate 3%, nano aluminium oxide 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%; Organosilicon modified crylic acid resin is wherein prepared as follows: (1) prepares raw material: by weight, and 16 parts of organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, 55 parts of solvents, 5 parts of initators; (2) solvent of total solvent amount 75wt% is joined in the four-hole boiling flask that reflux condensing tube, thermometer, agitator and dropping funel are housed, pass into nitrogen deoxygenation, put into oil bath pan, be heated to 115 ℃, start agitator, make solvent refluxing; The mixed solution that 16 parts of whole organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, the 95wt% of initator total amount, the 15wt% of solvent total amount are formed joined evenly in reactor in 2 hours, after adding, continue insulation reaction 3 hours; Remaining initator and solvent are joined in reactor, continue insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging; Organic silicon monomer comprises that weight ratio is vinyltrimethoxy silane, the Vinyldimethylethoxysilane of 5:6.
Preferably, (methyl) acrylate monomer comprises that weight ratio is 5:6 hydroxy-ethyl acrylate and hydroxypropyl acrylate.
Preferably, described hydroxy acryl acid ester monomer is a kind of in methacrylic acid-beta-hydroxy ethyl ester, methacrylic acid-β-hydroxypropyl acrylate, senecioate-hydroxyl ethyl ester or senecioate-hydroxypropyl acrylate; Described initator comprises main initator and auxiliary initator, and described main initator is a kind of in azodiisobutyronitrile, benzoyl peroxide, two t-amyl peroxy things or di-tert-butyl peroxide; Auxiliary initator is a kind of in peroxide-2-ethyl hexanoic acid tert-butyl, peroxidized t-butyl perbenzoate, two tertiary amyl peroxide.The weight ratio of main initator and auxiliary initator is 4:1.Described solvent is a kind of in ethyl acetate, butyl acetate, butanols, 1-Methoxy-2-propyl acetate or acetone.
Preferably, the concrete steps of preparing organic silicone modified acrylate coating material are as follows: in container, add aforementioned organosilicon modified crylic acid resin and the mixed organic solvents of 80% quality, and whole nano materials and dispersant; Carry out stirring at low speed (380 revs/min), mixing time approximately 6 minutes, stops mixer; Then add described color filler, (2500 revs/min) stir 15 minutes at a high speed; Grind, reach grain fineness≤8 μ m; Add again remaining organosilicon modified crylic acid resin and other various described auxiliary agents, and with remaining described organic solvent adjusting viscosity; Stir; Filter discharging.
Preferably, the technique of spraying priming paint and organic silicone modified acrylate coating material formation ice-phobic coating is as follows:
Clean and polishing:
Adopt 60 ℃ of warm water washings to remove the remaining paint stripper of shell, with clean brown shirting, be stained with solvent and slightly clean removal dirt, water sand milling or solvent sand milling case surface, with clean brown shirting, be stained with the cleaning agent fine purifiation surface of coatings system also dry, the surface of processing should be clean, pollution-free, guarantees that 35s moisture film does not diverge continuously;
Spraying priming paint
Cleaning and polishing step completes within 5 hours, shell surface uniform spray one deck epoxy Modified Alkyd Resin Primer; Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, case surface temperature more than 5 ℃, sprays one time higher than dew point;
Spraying organic silicone modified acrylate coating material
At priming paint, being dried to can adhesive tape but be no more than and within the scope of 72h, carry out primary coat processing: with light worn the coarse of dry spray that go of the sand felt that is moistened with flexible solvent or aqua, with the dust particle on the clean primary coat of dust-binding cloth surface, then use flexible solvent or alcohol isoreactivity solvent to the wiping one time gently of all primary coat faces; Until its dry tack free, determine primary coat surface without any pollution after, can application face be coated with; Adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, case surface temperature: more than 6 ℃, jet angle 77～88 is spent higher than dew point, spray voltage 31～35V, spraying current 220～235A;
Maintenance, treats that coating bone dry can come into operation.
Preferably, in uneven thickness on leading edge housing of ice-phobic coating, from attenuation or the first thickening attenuation gradually more gradually gradually backward of radome fairing front end.
The present invention also relates to a kind of method of preparing organosilicon modified crylic acid resin, prepare the method for organic silicone modified acrylate coating material and in cowl lip assembly, form the spray painting method of ice-phobic coating.
The specific embodiment
Cowl lip assembly according to the present invention comprises cowl lip housing and the ice-phobic coating that is positioned at hull outside, and this ice-phobic coating comprises priming paint and finish paint, and described priming paint is that epoxy Modified Alkyd Resin Primer, finish paint are organic silicone modified acrylate coating material.Preferably, the build of priming paint and finish paint is respectively 24 microns and 42 microns.Preferably, in the present invention, the cowl lip of indication refers to the radome fairing front portion that is projected in front 1/5 scope of chord length.More preferably, in uneven thickness on leading edge housing of ice-phobic coating, for example from radome fairing front end backward gradually attenuation or first gradually thickening in attenuation gradually, can not only improve anti-icing characteristic simultaneously but also can reduce the impact for radome fairing aeroperformance like this.
Particularly, in cowl lip hull outside, form ice-phobic coating and comprise the steps: that (1) prepare Silicone-Modified Acrylate Resin; (2) prepare organic silicone modified acrylate coating material; (3) spraying priming paint and organic silicone modified acrylate coating material, maintenance forms ice-phobic coating.
Silicone-Modified Acrylate Resin preparation method is specific as follows: (1) prepares raw material: by weight, and 16 parts of organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, 55 parts of solvents, 5 parts of initators; (2) solvent of total solvent amount 75wt% is joined in the four-hole boiling flask that reflux condensing tube, thermometer, agitator and dropping funel are housed, pass into nitrogen deoxygenation, put into oil bath pan, be heated to 115 ℃, start agitator, make solvent refluxing; The mixed solution that 16 parts of whole organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, the 95wt% of initator total amount, the 15wt% of solvent total amount are formed joined evenly in reactor in 2 hours, after adding, continue insulation reaction 3 hours; Remaining initator and solvent are joined in reactor, continue insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging.
Preferably, organic silicon monomer comprises that weight ratio is vinyltrimethoxy silane, the Vinyldimethylethoxysilane of 5:6.(methyl) acrylate monomer comprises that weight ratio is 5:6 hydroxy-ethyl acrylate and hydroxypropyl acrylate.
Described hydroxy acryl acid ester monomer is a kind of in methacrylic acid-beta-hydroxy ethyl ester, methacrylic acid-β-hydroxypropyl acrylate, senecioate-hydroxyl ethyl ester or senecioate-hydroxypropyl acrylate;
Described initator comprises main initator and auxiliary initator, and described main initator is a kind of in azodiisobutyronitrile, benzoyl peroxide, two t-amyl peroxy things or di-tert-butyl peroxide; Auxiliary initator is a kind of in peroxide-2-ethyl hexanoic acid tert-butyl, peroxidized t-butyl perbenzoate, two tertiary amyl peroxide.The weight ratio of main initator and auxiliary initator is 4:1.
Described solvent is a kind of in ethyl acetate, butyl acetate, butanols, 1-Methoxy-2-propyl acetate or acetone.
The concrete steps of preparing organic silicone modified acrylate coating material are as follows:
The aforementioned organosilicon modified crylic acid resin and the mixed organic solvents that in container, add 80% quality, and whole nano materials and dispersant; Carry out stirring at low speed (380 revs/min), mixing time approximately 6 minutes, stops mixer; Then add described color filler, (2500 revs/min) stir 15 minutes at a high speed; Grind, reach grain fineness≤8 μ m; Add again remaining organosilicon modified crylic acid resin and other various described auxiliary agents, and with remaining described organic solvent adjusting viscosity; Stir; Filter discharging.
Preferably, color filler used can be selected multiple pigment, for example white, red, yellow, black or blueness, wherein said Chinese white is rutile type titanium white, described redness and yellow uitramarine are azo pigment, described black pigment is middle colour carbon black, and described blue pigment is the blue or green series of phthalein.Described levelling agent is the surfactant of esters of acrylic acid, ester fourth cellulose family and long-chain silicones class; Described catalyst is not contain the environment-friendly type catalyst of organotin, for example K-KAT4205 zirconium complex.Defoamer, composition is polysiloxane solution, for example BYK-066N or BYK-141; Dispersant, composition is for the high molecular weight block copolymer solution containing affine pigment group, as BYK-161 or BYK-163; Described mixed solvent is the mixture of methyl iso-butyl ketone (MIBK), 1-Methoxy-2-propyl acetate and butyl acetate, and mixed proportion is 1:2:3.Preferably, by weight, organosilicon modified crylic acid resin 55-65%, color filler 20-25%, nano-calcium carbonate 3%, nano aluminium oxide 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%.
The technique that spraying priming paint and organic silicone modified acrylate coating material form ice-phobic coating is as follows:
Clean and polishing:
Adopt 60 ℃ of warm water washings to remove the remaining paint stripper of shell, with clean brown shirting, be stained with solvent and slightly clean removal dirt, water sand milling or solvent sand milling case surface, with clean brown shirting, be stained with the cleaning agent fine purifiation surface of coatings system also dry, the surface of processing should be clean, pollution-free, guarantees that 35s moisture film does not diverge continuously;
Spraying priming paint
Cleaning and polishing step completes within 5 hours, shell surface uniform spray one deck epoxy Modified Alkyd Resin Primer; Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, case surface temperature more than 5 ℃, sprays one time higher than dew point;
Spraying organic silicone modified acrylate coating material
At priming paint, being dried to can adhesive tape but be no more than and within the scope of 72h, carry out primary coat processing: with light worn the coarse of dry spray that go of the sand felt that is moistened with flexible solvent or aqua, with the dust particle on the clean primary coat of dust-binding cloth surface, then use flexible solvent or alcohol isoreactivity solvent to the wiping one time gently of all primary coat faces; Until its dry tack free, determine primary coat surface without any pollution after, can application face be coated with; Adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, case surface temperature: more than 6 ℃, jet angle 77～88 is spent higher than dew point, spray voltage 31～35V, spraying current 220～235A;
Maintenance, treats that coating bone dry can come into operation.
Ice-phobic coating according to the present invention have lower surface can, can effectively prevent from that cowl lip from freezing and being conducive to established ice cube to come off.Meanwhile, this ice-phobic coating meets national standard, as GB6379, GB1725, GB1720, GB1732, the GB1728 requirement about coating hardness, viscosity, adhesive force, impact strength and drying time.
Those skilled in the art can make and replacing or modification content of the present invention according to content disclosed by the invention and the art technology of grasping; but these replacements or modification should not be considered as departing from the present invention's design, and these replacements or modification are all in the claimed interest field of the present invention.
Claims (9)
1. an aircraft radome leading edge assembly, comprises cowl lip housing and the ice-phobic coating that is positioned at hull outside, and this ice-phobic coating comprises priming paint and finish paint, and described priming paint is that epoxy Modified Alkyd Resin Primer, finish paint are organic silicone modified acrylate coating material; The build of priming paint and finish paint is respectively 24 microns and 42 microns; Described organic silicone modified acrylate coating material comprises: by weight, and organosilicon modified crylic acid resin 55-65%, color filler 20-25%, nano-calcium carbonate 3%, nano aluminium oxide 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%; Organosilicon modified crylic acid resin is wherein prepared as follows: (1) prepares raw material: by weight, and 16 parts of organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, 55 parts of solvents, 5 parts of initators; (2) solvent of total solvent amount 75wt% is joined in the four-hole boiling flask that reflux condensing tube, thermometer, agitator and dropping funel are housed, pass into nitrogen deoxygenation, put into oil bath pan, be heated to 115 ℃, start agitator, make solvent refluxing; The mixed solution that 16 parts of whole organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, the 95wt% of initator total amount, the 15wt% of solvent total amount are formed joined evenly in reactor in 2 hours, after adding, continue insulation reaction 3 hours; Remaining initator and solvent are joined in reactor, continue insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging; Organic silicon monomer comprises that weight ratio is vinyltrimethoxy silane, the Vinyldimethylethoxysilane of 5:6.
2. cowl lip assembly according to claim 1, is characterized in that: (methyl) acrylate monomer comprises that weight ratio is 5:6 hydroxy-ethyl acrylate and hydroxypropyl acrylate.
3. according to the cowl lip assembly described in aforementioned arbitrary claim, it is characterized in that: described hydroxy acryl acid ester monomer is a kind of in methacrylic acid-beta-hydroxy ethyl ester, methacrylic acid-β-hydroxypropyl acrylate, senecioate-hydroxyl ethyl ester or senecioate-hydroxypropyl acrylate; Described initator comprises main initator and auxiliary initator, and described main initator is a kind of in azodiisobutyronitrile, benzoyl peroxide, two t-amyl peroxy things or di-tert-butyl peroxide; Auxiliary initator is a kind of in peroxide-2-ethyl hexanoic acid tert-butyl, peroxidized t-butyl perbenzoate, two tertiary amyl peroxide.The weight ratio of main initator and auxiliary initator is 4:1.Described solvent is a kind of in ethyl acetate, butyl acetate, butanols, 1-Methoxy-2-propyl acetate or acetone.
4. according to the cowl lip assembly described in aforementioned arbitrary claim, it is characterized in that: the concrete steps of preparing organic silicone modified acrylate coating material are as follows: in container, add aforementioned organosilicon modified crylic acid resin and the mixed organic solvents of 80% quality, and whole nano materials and dispersant; Carry out stirring at low speed (380 revs/min), mixing time approximately 6 minutes, stops mixer; Then add described color filler, (2500 revs/min) stir 15 minutes at a high speed; Grind, reach grain fineness≤8 μ m; Add again remaining organosilicon modified crylic acid resin and other various described auxiliary agents, and with remaining described organic solvent adjusting viscosity; Stir; Filter discharging.
5. according to the cowl lip assembly described in aforementioned arbitrary claim, it is characterized in that: the technique that spraying priming paint and organic silicone modified acrylate coating material form ice-phobic coating is as follows:
Clean and polishing:
Adopt 60 ℃ of warm water washings to remove the remaining paint stripper of shell, with clean brown shirting, be stained with solvent and slightly clean removal dirt, water sand milling or solvent sand milling case surface, with clean brown shirting, be stained with the cleaning agent fine purifiation surface of coatings system also dry, the surface of processing should be clean, pollution-free, guarantees that 35s moisture film does not diverge continuously;
Spraying priming paint
Cleaning and polishing step completes within 5 hours, shell surface uniform spray one deck epoxy Modified Alkyd Resin Primer; Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, case surface temperature more than 5 ℃, sprays one time higher than dew point;
Spraying organic silicone modified acrylate coating material
At priming paint, being dried to can adhesive tape but be no more than and within the scope of 72h, carry out primary coat processing: with light worn the coarse of dry spray that go of the sand felt that is moistened with flexible solvent or aqua, with the dust particle on the clean primary coat of dust-binding cloth surface, then use flexible solvent or alcohol isoreactivity solvent to the wiping one time gently of all primary coat faces; Until its dry tack free, determine primary coat surface without any pollution after, can application face be coated with; Adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, case surface temperature: more than 6 ℃, jet angle 77～88 is spent higher than dew point, spray voltage 31～35V, spraying current 220～235A;
Maintenance, treats that coating bone dry can come into operation.
6. according to the cowl lip assembly described in aforementioned arbitrary claim, it is characterized in that: in uneven thickness on leading edge housing of ice-phobic coating, from attenuation or the first thickening attenuation gradually more gradually gradually backward of radome fairing front end.
7. one kind for the preparation of according to forming the method for the organic silicone modified acrylate coating material of ice-phobic coating in the cowl lip assembly described in any one in claim 1-6, it is characterized in that concrete steps are as follows: in container, add aforementioned organosilicon modified crylic acid resin and the mixed organic solvents of 80% quality, and whole nano materials and dispersant; Carry out stirring at low speed (380 revs/min), mixing time approximately 6 minutes, stops mixer; Then add described color filler, (2500 revs/min) stir 15 minutes at a high speed; Grind, reach grain fineness≤8 μ m; Add again remaining organosilicon modified crylic acid resin and other various described auxiliary agents, and with remaining described organic solvent adjusting viscosity; Stir; Filter discharging; This coating comprises: by weight, and organosilicon modified crylic acid resin 55-65%, color filler 20-25%, nano-calcium carbonate 3%, nano aluminium oxide 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%.
8. one kind for the preparation of according to the method that forms the organosilicon modified crylic acid resin in the organic silicone modified acrylate coating material of ice-phobic coating in the cowl lip assembly described in any one in claim 1-6, it is characterized in that specific as follows: (1) prepares raw material: by weight, 16 parts of organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, 55 parts of solvents, 5 parts of initators; (2) solvent of total solvent amount 75wt% is joined in the four-hole boiling flask that reflux condensing tube, thermometer, agitator and dropping funel are housed, pass into nitrogen deoxygenation, put into oil bath pan, be heated to 115 ℃, start agitator, make solvent refluxing; The mixed solution that 16 parts of whole organic silicon monomers, 100 parts of (methyl) acrylate monomers, 45 parts of hydroxy acryl acid esters, 5 parts of acrylonitrile, 20 parts of amido silicon oils, the 95wt% of initator total amount, the 15wt% of solvent total amount are formed joined evenly in reactor in 2 hours, after adding, continue insulation reaction 3 hours; Remaining initator and solvent are joined in reactor, continue insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging.
9. according to forming a spray painting method for ice-phobic coating in the cowl lip assembly described in any one in claim 1-6, it is characterized in that concrete technology is as follows:
Clean and polishing:
Adopt 60 ℃ of warm water washings to remove the remaining paint stripper of shell, with clean brown shirting, be stained with solvent and slightly clean removal dirt, water sand milling or solvent sand milling case surface, with clean brown shirting, be stained with the cleaning agent fine purifiation surface of coatings system also dry, the surface of processing should be clean, pollution-free, guarantees that 35s moisture film does not diverge continuously;
Spraying priming paint
Cleaning and polishing step completes within 5 hours, shell surface uniform spray one deck epoxy Modified Alkyd Resin Primer; Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, case surface temperature more than 5 ℃, sprays one time higher than dew point;
Spraying organic silicone modified acrylate coating material
At priming paint, being dried to can adhesive tape but be no more than and within the scope of 72h, carry out primary coat processing: with light worn the coarse of dry spray that go of the sand felt that is moistened with flexible solvent or aqua, with the dust particle on the clean primary coat of dust-binding cloth surface, then use flexible solvent or alcohol isoreactivity solvent to the wiping one time gently of all primary coat faces; Until its dry tack free, determine primary coat surface without any pollution after, can application face be coated with; Adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, case surface temperature: more than 6 ℃, jet angle 77～88 is spent higher than dew point, spray voltage 31～35V, spraying current 220～235A;
Maintenance, treats that coating bone dry can come into operation.
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| CN103203938A (en) * | 2013-04-12 | 2013-07-17 | 大连交通大学 | Spontaneous heating coating for substrate surface and preparation method of spontaneous heating coating |
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