CN103600565B - Air vehicle wing shell having fluorocarbon protective layer - Google Patents
Air vehicle wing shell having fluorocarbon protective layer Download PDFInfo
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- CN103600565B CN103600565B CN201310524388.0A CN201310524388A CN103600565B CN 103600565 B CN103600565 B CN 103600565B CN 201310524388 A CN201310524388 A CN 201310524388A CN 103600565 B CN103600565 B CN 103600565B
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Abstract
An air vehicle wing shell having a fluorocarbon protective layer includes a skin-covering base material and a protective coating layer. The protective coating layer comprises a layer of zinc yellow acrylic polyurethane primer and two layers of fluorocarbon finishing paint, and an A component of the fluorocarbon finishing paint includes the following components: high hydroxyl fluorine-containing acrylic resin, a color filler, nano magnesium oxide, nano titanium dioxide, a leveling agent, a defoaming agent, a dispersing agent, a catalyst and a solvent. The air vehicle wing shell according to the invention can better adapt to current increasingly demanding flight conditions, and improves the flight safety.
Description
Technical field
The present invention relates to a kind of aircraft wing shell with fluorine carbon protective layer.
Background technology
Along with the application in aircraft industry of the alloy material such as aluminium, magnesium and composite, the performance of aircraft especially flying speed has had large increase, and the flying speed of present aircraft can more than 1km/s.Square being directly proportional of frictional force suffered by moving object and speed, therefore the raising of flying speed, requirements at the higher level are proposed to the performance of airplane skin, especially temperature tolerance, ultraviolet resistance, freeze-thawing resistant cyclicity, wearability, resistance to weathering etc., therefore usually need to arrange protective coating in the aircraft wing shell of aircraft, this coating is generally formed by the mode of sprayed coating, but existing conventional coating has been difficult to meet current day by day harsh requirement.Fluorocarbon coating is the high functional paint of one in recent years risen, due to the C-F key containing chemical binding force extra-heavy in fluororesin molecule, bond energy is up to 485.3KJ/mol, very stable, in addition fluorine element is the element that in the periodic table of elements, electronegativity is the strongest, strong to core outer-shell electron attraction, be difficult to anodization, and fluorine atom volume has space steric effect greatly, the stability of main chain is increased greatly, be heated, light (comprising ultraviolet), under various chemical mediator and solvent action, C-F key is difficult to fracture, therefore fluorocarbon resin has superpower weatherability, chemical-resistant, wearability and heat-resisting quantity etc.The fluorine carbon aircraft skin coating be made up of this kind of resin has the unapproachable excellent properties of other coating.But the existing fluorocarbon coating ubiquity degree of cross linking not, fluorochemical monomer ratio is high causes that cost is high, amount of solid content low VOC content is high causes the defects such as environmental pollution.
Summary of the invention
The present invention is intended to overcome aforementioned drawback, a kind of aircraft wing shell comprising low cost, eco-friendly paint coatings is provided, particularly, this aircraft wing shell comprises skin substrate and protective coating, this protective coating comprises one deck zinc yellow acrylic polyurethane primer and two-layer fluorine carbon finishing paint, zinc yellow acrylic polyurethane primer build is 23 microns, and middle fluorine carbon finishing paint build is 45 microns, and outer fluorine carbon finishing paint build is 46 microns.
Described protective coating is by being formed at skin substrate surface spraying coating, described coating comprises fluorocarbon coating, and this fluorocarbon coating component A comprises following ingredients: by weight, high fluorinated hydroxy acrylic resin 61-65%, color filters 20-26%, nano magnesia 3%, nano titanium oxide 3.5%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%; Described levelling agent is the surfactant of esters of acrylic acid, ester fourth cellulose family and long-chain silicones class; Described catalyst is not containing the environment-friendly type catalyst of organotin; Defoamer, composition is polysiloxane solution; Dispersant, composition is the high molecular weight block copolymer solution containing affine pigment group; 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.
Wherein the concrete manufacture method of high fluorinated hydroxy acrylic resin is as follows: comprise the following steps:
(1) solvent of total solvent amount 70wt% 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 110 DEG C, start agitator, make solvent refluxing;
(2) mixed solution be made up of the 95wt% of whole monomer, chain-transferring agent, initator total amount, the 20wt% of solvent total amount was joined evenly in reactor in 2 hours, after adding, continue insulation reaction 3 hours;
(3) remaining initator and solvent are joined in reactor, continue insulation reaction and stop for 2.5 hours, be cooled to room temperature;
(4) pour in round-bottomed flask, at 60 DEG C after decompression distillation major part solvent, then after absolute methanol washing of precipitate, to be sent in 60 DEG C of drying bakers drying under reduced pressure 24 hours, then to be dissolved in ethyl acetate, obtain product.
The technique of described fluorocarbon coating is as follows: according to the formula of component A, adds the described high fluorinated hydroxy acrylic resin of 80% quality and described organic solvent in a reservoir, and whole described nano materials and described dispersant; Carry out stirring at low speed (350 revs/min), mixing time about 8 minutes, stop mixer; Then add described color filters, (1500 revs/min) stir 20 minutes at a high speed; Grinding, reaches grain fineness≤10 μm; Add remaining described high fluorinated hydroxy acrylic resin and other various described auxiliary agents again, and with remaining described organic solvent adjusting viscosity; Stir; Filter; Obtained described component A is packed separately; Component B is packed separately according to the regulation proportioning with component A.
The technique utilizing fluorocarbon coating to form protective coating on skin substrate surface comprises the steps:
Cleaning and polishing:
60 DEG C of warm water washings are adopted to remove the remaining paint stripper of covering, be stained with solvent with the brown shirting of cleaning and slightly clean removal dirt, water sand milling or solvent sand milling skin-surface, be stained with the cleaning agent fine purifiation of coatings system surperficial and dry with the brown shirting of cleaning, the surface processed should be clean, pollution-free, ensures that 35s moisture film does not diverge continuously;
Spray-applied primer
Within cleaning and polishing step complete 5 hours, uniformly spray one deck zinc yellow acrylic polyurethane primer in skin substrate; Adopt airless spraying, pressure ratio 35:1, spray gun distance 550 ~ 720mm, jet angle 75 ~ 80 degree, spray voltage 26 ~ 30V, spraying current 200 ~ 240A, nozzle diameter: 0.48 ~ 0.56mm, ambient humidity: < 76%, skin substrate surface temperature, higher than dew point more than 5 DEG C, sprays one time;
Spraying ground floor fluorine carbon finishing paint
Being dried at priming paint can adhesive tape but be no more than within the scope of 72h and carry out primary coat process: remove the coarse of dry spray with the sand felt being moistened with flexible solvent or aqua is gently worn, clean the dust particle of primed surface with dust-binding cloth, 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 primed surface without any pollution after, can application face be coated with; Coating is allocated: before bucket driven by coating, concussion material 10 ~ 15min, and coating continues after driving bucket to stir 10min until without any solid sedimentation at the bottom of tank; Then be by ratio of weight and the number of copies: base-material 90 parts, 30 parts, curing agent carry out mixing preparation, on-the-spot slaking 22 minutes after allotment, add F-C paint special diluting agent after slaking and dilute, being diluted to viscosity is 16mPas; Adopt airless spraying, pressure ratio 37:1, spray gun distance 470 ~ 610mm, nozzle diameter: 0.77 ~ 0.92mm, ambient humidity: < 75%, skin substrate surface temperature: higher than dew point more than 6 DEG C, jet angle 67 ~ 78 degree, spray voltage 27 ~ 31V, spraying current 210 ~ 245A;
Spraying second layer fluorine carbon finishing paint
Second layer fluorine carbon finishing paint starts sticky at ground floor fluorine carbon finishing paint but starts to carry out under the state of not touching with one's hand, about to spray after ground floor fluorine carbon finishing paint 25 minutes, adopt airless spraying, pressure ratio 50:1, spray gun distance 800 ~ 850mm, nozzle diameter: 1.08 ~ 1.50mm, ambient humidity: < 76%, skin substrate surface temperature: higher than dew point more than 7 DEG C, jet angle 68 ~ 79 degree, spray voltage 28 ~ 31V, spraying current 230 ~ 245A.
Owing to have employed low cost of the present invention, eco-friendly paint coatings, the aircraft wing shell of aircraft can adapt to current day by day harsh flying condition better, improves flight safety; And due to the premium properties of coating, add the service life of shell, reduce flight cost.
Detailed description of the invention
A kind of aircraft wing shell, comprise skin substrate and protective coating, this protective coating comprises one deck zinc yellow acrylic polyurethane primer and two-layer fluorine carbon finishing paint.Zinc yellow acrylic polyurethane primer build is 23 microns, and middle fluorine carbon finishing paint build is 45 microns, and outer fluorine carbon finishing paint build is 46 microns.
This protective coating is by being formed at skin substrate surface spraying coating, and described coating comprises fluorocarbon coating, preferably, this fluorocarbon coating component A comprises following ingredients: by weight, high fluorinated hydroxy acrylic resin 61-65%, color filters 20-26%, nano magnesia 3%, nano titanium oxide 3.5%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%.More preferably, this fluorocarbon coating component A comprises following ingredients: by weight, high fluorinated hydroxy acrylic resin 63%, color filters 23%, nano magnesia 3%, nano titanium oxide 3.5%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 4%.B component (crosslinking agent) can select Desmobuer N75 or N3600 of Bayer A.G.The part by weight of component A and B component is preferably 3:1.Wherein, nano magnesia, nano titanium oxide can select 50 Nano grades.Preferably, the solid content of high fluorinated hydroxy acrylic resin used is 74-78%, viscosity 2200-2500mPas, number-average molecular weight 4328, and a point strength profile exponent is 1.71.Color filters used can select multiple pigment, such as white, red, yellow, black or blueness, and wherein said Chinese white is rutile type titanium white, be selected from the R-706 of E.I.Du Pont Company, NL, chemical company 2130; Described redness and yellow uitramarine are azo pigment, are selected from IRGAZINYELLOW2RLT, IRGAZIN RED2030 of Ciba Specialty Chemicals; Described black pigment is middle colour carbon black, is selected from the M900 of Cabot Co., Ltd; Described blue pigment is the blue or green series of phthalein, selects BASF pigment Blau L6905F.Described levelling agent is the surfactant of esters of acrylic acid, ester fourth cellulose family and long-chain silicones class; Described catalyst is not containing the environment-friendly type catalyst of organotin, is specifically selected from the K-KAT metal complex series that Jin Shi industrial group (KING INDUSTRIES) produces, such as K-KAT4205 zirconium complex.Defoamer, composition is polysiloxane solution, as BYK-066N or BYK-141 of German Bi Ke chemical company; Dispersant, composition is the high molecular weight block copolymer solution containing affine pigment group, as BYK-161 or BYK-163 of German Bi Ke chemical company; 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, the production technology of this fluorocarbon coating is: according to the formula of component A, adds the described high fluorinated hydroxy acrylic resin of 80% quality and described organic solvent in a reservoir, and whole described nano materials and described dispersant; Carry out stirring at low speed (350 revs/min), mixing time about 8 minutes, stop mixer; Then add described color filters, (1500 revs/min) stir 20 minutes at a high speed; Grinding, reaches grain fineness≤10 μm; Add remaining described high fluorinated hydroxy acrylic resin and other various described auxiliary agents again, and with remaining described organic solvent adjusting viscosity; Stir; Filter; Obtained described component A is packed separately; Component B is packed separately according to the regulation proportioning with component A.
High fluorinated hydroxy acrylic resin used passes through free radical solution polymerization gained by fluorinated acrylate monomer, hydroxy acryl acid ester monomer, alkyl methacrylate monomer, alkyl acrylate monomer; As follows preferably:
By weight, the each component and the consumption thereof that participate in polymerization are as follows: fluorinated acrylate monomer 15-20 part, hydroxy acryl acid ester monomer 18-25 part, alkyl methacrylate monomer 10-15 part, alkyl acrylate monomer 10-14 part, initator 1.5-3 part, chain-transferring agent 0.8-2 part, solvent 35-45 part;
Described fluorinated acrylate monomer is acrylic acid octafluoro pentyl ester, trifluoroethyl methacrylate, Hexafluorobutyl mathacrylate; By weight, ratio is preferably 3:2:1.
Described hydroxy acryl acid ester monomer is the one in methacrylic acid-beta-hydroxy ethyl ester, methacrylic acid-β-hydroxypropyl acrylate, senecioate-hydroxyl ethyl ester or senecioate-hydroxypropyl acrylate;
Described alkyl methacrylate monomer is one or both in methyl methacrylate, EMA, n-BMA, cyclohexyl methacrylate or isobornyl methacrylate;
Described alkyl acrylate monomer is n-octyl, octadecyl acrylate; By weight, ratio is preferably 3:2.
Described main initator is the one in azodiisobutyronitrile, benzoyl peroxide, two t-amyl peroxy compounds or di-tert-butyl peroxide; Co initiator is the one in peroxide-2-ethyl hexanoic acid tert-butyl, peroxidized t-butyl perbenzoate, two tertiary amyl peroxide.The weight ratio of main initator and co initiator is 4:1.
Described chain-transferring agent is the one in 2 mercapto ethanol, n-butyl mercaptan, n-dodecyl mereaptan or 3-sulfydryl-1,2-PD;
Described solvent is the one in ethyl acetate, butyl acetate, butanols, 1-Methoxy-2-propyl acetate or acetone.
Preferably, wherein the concrete manufacture method of high fluorinated hydroxy acrylic resin is as follows: comprise the following steps:
(1) solvent of total solvent amount 70wt% 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 110 DEG C, start agitator, make solvent refluxing;
(2) mixed solution be made up of the 95wt% of whole monomer, chain-transferring agent, initator total amount, the 20wt% of solvent total amount was joined evenly in reactor in 2 hours, after adding, continue insulation reaction 3 hours;
(3) remaining initator and solvent are joined in reactor, continue insulation reaction and stop for 2.5 hours, be cooled to room temperature;
(4) pour in round-bottomed flask, at 60 DEG C after decompression distillation major part solvent (such as more than 90%), then after absolute methanol washing of precipitate, to be sent in 60 DEG C of drying bakers drying under reduced pressure 24 hours, then to be dissolved in ethyl acetate, obtain product.
Preferably, as follows in the technique of skin substrate surface spraying coating formation protective coating:
Cleaning and polishing:
60 DEG C of warm water washings are adopted to remove the remaining paint stripper of covering, be stained with solvent with the brown shirting of cleaning and slightly clean removal dirt, water sand milling or solvent sand milling skin-surface, be stained with the cleaning agent fine purifiation of coatings system surperficial and dry with the brown shirting of cleaning, the surface processed should be clean, pollution-free, ensures that 35s moisture film does not diverge continuously;
Spray-applied primer
Within cleaning and polishing step complete 5 hours, uniformly spray one deck zinc yellow acrylic polyurethane primer in skin substrate; Adopt airless spraying, pressure ratio 35:1, spray gun distance 550 ~ 720mm, jet angle 75 ~ 80 degree, spray voltage 26 ~ 30V, spraying current 200 ~ 240A, nozzle diameter: 0.48 ~ 0.56mm, ambient humidity: < 76%, skin substrate surface temperature, higher than dew point more than 5 DEG C, sprays one time;
Spraying ground floor fluorine carbon finishing paint
Being dried at priming paint can adhesive tape but be no more than within the scope of 72h and carry out primary coat process: remove the coarse of dry spray with the sand felt being moistened with flexible solvent or aqua is gently worn, clean the dust particle of primed surface with dust-binding cloth, 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 primed surface without any pollution after, can application face be coated with; Coating is allocated: before bucket driven by coating, concussion material 10 ~ 15min, and coating continues after driving bucket to stir 10min until without any solid sedimentation at the bottom of tank; Then be by ratio of weight and the number of copies: base-material 90 parts, 30 parts, curing agent carry out mixing preparation, on-the-spot slaking 22 minutes after allotment, add F-C paint special diluting agent after slaking and dilute, being diluted to viscosity is 16mPas; Adopt airless spraying, pressure ratio 37:1, spray gun distance 470 ~ 610mm, nozzle diameter: 0.77 ~ 0.92mm, ambient humidity: < 75%, skin substrate surface temperature: higher than dew point more than 6 DEG C, jet angle 67 ~ 78 degree, spray voltage 27 ~ 31V, spraying current 210 ~ 245A;
Spraying second layer fluorine carbon finishing paint
Second layer fluorine carbon finishing paint starts sticky at ground floor fluorine carbon finishing paint but starts to carry out under the state of not touching with one's hand, about to spray after ground floor fluorine carbon finishing paint 25 minutes, adopt airless spraying, pressure ratio 50:1, spray gun distance 800 ~ 850mm, nozzle diameter: 1.08 ~ 1.50mm, ambient humidity: < 76%, skin substrate surface temperature: higher than dew point more than 7 DEG C, jet angle 68 ~ 79 degree, spray voltage 28 ~ 31V, spraying current 230 ~ 245A.
Those skilled in the art can make replacement or modification according to content disclosed by the invention and the art technology grasped to content of the present invention; but these replacements or modification should not be considered as disengaging the present invention design, and these replacements or modification are all in the interest field of application claims protection.
Claims (1)
1. one kind has the aircraft wing shell of fluorine carbon protective layer, comprise skin substrate and protective coating, this protective coating comprises one deck zinc yellow acrylic polyurethane primer and two-layer fluorine carbon finishing paint, zinc yellow acrylic polyurethane primer build is 23 microns, middle fluorine carbon finishing paint build is 45 microns, and outer fluorine carbon finishing paint build is 46 microns; It is characterized in that: described protective coating is by being formed at skin substrate surface spraying coating, described coating comprises fluorocarbon coating, and this fluorocarbon coating component A comprises following ingredients: by weight, high fluorinated hydroxy acrylic resin 61-65%, color filters 20-26%, nano magnesia 3%, nano titanium oxide 3.5%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, mixed solvent 3-5%; Described levelling agent is the surfactant of esters of acrylic acid, ester fourth cellulose family and long-chain silicones class; Described catalyst is not containing the environment-friendly type catalyst of organotin; Defoamer is polysiloxane solution; Dispersant is the high molecular weight block copolymer solution containing affine pigment group; 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.
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| CN201310524388.0A CN103600565B (en) | 2013-10-30 | 2013-10-30 | Air vehicle wing shell having fluorocarbon protective layer |
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| CN201310524388.0A CN103600565B (en) | 2013-10-30 | 2013-10-30 | Air vehicle wing shell having fluorocarbon protective layer |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6734236B1 (en) * | 1999-03-29 | 2004-05-11 | Daikin Industries, Ltd. | Fluorine-containing resin powder coating composition |
| CN102357454A (en) * | 2011-08-25 | 2012-02-22 | 沈阳飞机工业（集团）有限公司 | Spraying process for fluorocarbon surface layer paint |
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2013
- 2013-10-30 CN CN201310524388.0A patent/CN103600565B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6734236B1 (en) * | 1999-03-29 | 2004-05-11 | Daikin Industries, Ltd. | Fluorine-containing resin powder coating composition |
| CN102357454A (en) * | 2011-08-25 | 2012-02-22 | 沈阳飞机工业（集团）有限公司 | Spraying process for fluorocarbon surface layer paint |
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| 《氟碳漆的喷涂工艺研究及应用》;刘长海 等;《现代涂装》;20120531;第15卷(第5期);全文 * |
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