CN102977726B - Low infrared emissivity corrosion resistant coating - Google Patents

Low infrared emissivity corrosion resistant coating Download PDF

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CN102977726B
CN102977726B CN201210445508.3A CN201210445508A CN102977726B CN 102977726 B CN102977726 B CN 102977726B CN 201210445508 A CN201210445508 A CN 201210445508A CN 102977726 B CN102977726 B CN 102977726B
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parts
powder
sheet
floatability
coating
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CN102977726A (en
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求才军
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Runtai New Material Co.,Ltd.
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YINCHUAN BOJU INDUSTRIAL PRODUCT DESIGN Co Ltd
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Abstract

The invention discloses a kind of novel low infrared emissivity corrosion resistant coating, unit serving meter comprises following component by weight: 80 parts of polyurethane; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 0~50 part, floatability sheet Al powder; 0~50 part, floatability sheet Cu powder; Silane coupling agent KH550? 10~20 parts; 10~20 parts of dimethylbenzene; 4~8 parts of cyclohexanes. The coating infrared emittance making is low, and greatly improves through the coating decay resistance of modification, has very much application prospect.

Description

Low infrared emissivity corrosion resistant coating
Technical field
The present invention relates to a kind of sapecial coating, particularly a kind of novel low infrared emissivity and decay resistance are goodCoating.
Background technology
From 20 century 70 precision guided weapon first Application, since war, precision guided weapon and guidance technology existIn all previous war, bring into play very important effect. And along with the continuous variation of war situation, progressively the showing especially of IT-based warfare,The feature of precision guided weapon makes it become the emphasis of various countries' military developments. And as important member in precision guided weapon familyInfrared acquisition guided weapon shown especially its superiority: there is high accuracy, high sensitivity, high-resolution, high frame frequency and (stareInfrared), strong interference immunity, can identify the even critical position of target of target automatically, can work double tides etc. feature, extensive at presentBe applied in seeker and dexterous ammunition. Wherein infrared with airborne Infrared Search and Track System (lRST), Air-borne Forward-looking(FLIR), the development of guided missile infrared seeker is particularly swift and violent. According to statistics, IRST can reach the forward detection distance of fighter plane185Km is close with the operating distance of airborne radar; FLIR reaches 68~117Km to the decipherment distance of target; Infrared imaging guidingThe engagement range of head reaches 20Km left and right. Infrared Detectors thermal imaging, in the rapid osmotic of military field, is equipped with various accurateGuided weapon, as long as military target is found, just can be destroyed substantially, and serious threat is to the existence of military target. CauseThis, be subject to the extensive concern of the military of various countries to reduce and to weaken enemy's infrared detector usefulness as the infrared stealth technology of objectFall.
Stealth technology claims again target signature control or low detectable technology, and it is mainly the letter by changing or suppress targetNumber feature, makes it be difficult to be found! Identification! The technology battle array of following the tracks of and attacking. Along with modern military Detection Techniques and guidance technologyDevelopment, the importance of stealth technology in modernization information war grows with each passing day, and becomes and improves weaponry survival ability, prominent anti-The key technology of ability and fighting efficiency, causes the generally attention of countries in the world day by day. In the U.S., stealth technology is listed in national defenceOne of three large high-tech (another two is Star Wars Program and nuclear technology). Stealth technology comprises radar invisible, infrared stealth, swashsThe fields such as light is stealthy, visible ray is stealthy, sound is stealthy, magnetic is stealthy, but the detection facing at present threatens still with radar and infrared systemBe main falling. To the research of radar invisible, carry out the time early, theory is also more ripe. By contrast, infrared stealth technology will be slowMany, much more difficult, both at home and abroad relevant report is also less. Therefore infrared stealth technology is as improving military installations and weapon dressThe key factor of standby viability and fighting capacity, has caused the attention of various countries.
The essence of infrared stealth is entered radiation characteristics such as energy, frequency range, thermal source and directions by various technical measures exactlyRow weakens, and reduces the infra-red radiation difference of target and background, makes detector not receive enough energy, thereby reduces target quiltFind identification and the probability of following the tracks of.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, propose one and there is low infrared emissivity, and simultaneously resistance toCorrosive nature has good coating.
In order to realize foregoing invention object, the present invention by the following technical solutions: a kind of novel low infrared emissivity corrosion resistantErosion coating, unit serving meter comprises following component by weight: 80 parts of polyurethane; Maleic anhydride modified ethylene propylene diene rubber 120Part; 0~50 part, floatability sheet Al powder; 0~50 part, floatability sheet Cu powder; 10~20 parts of Silane coupling agent KH550s;10~20 parts of dimethylbenzene; 4~8 parts of cyclohexanes.
The particle diameter of described floatability sheet Al powder is at 20~30 μ m.
The particle diameter of described floatability sheet Cu powder is at 20~50 μ m.
Infrared coating is usually directed to the filler particles of random distribution in certain matrix (adhesive), these filler particlesPlay the thermal-radiating effect of selective scattering substrate. Emittance in coating can be regarded as by electromagnetic wave or photon and carried, with itCorresponding has two kinds of theories conventionally for the Radiation Transfer Problems in coating: a kind of is to be set out repeatedly by Maxwell equation groupScattering theory; Another kind is exactly transmission theory. The latter adopts the second-rate theory of Kubelka-Munk to set up infrared radiating coatingRadiative transfer model, derive and obtained the folding of the spectral emissivity of infrared coating and coating surface reflectivity, coating through theoryPenetrate the decisions such as the size, shape, distribution density of particle in the chemical composition of rate, material and microstructure, material. Low infrared emissionRate coating must possess high conductivity, high reflectance, high scattering coefficient and low absorption coefficient.
From Kirchhoff's law, the reflectivity of opaque body is higher, and emissivity is just lower. Metal dust generally belongs toOpaque body, therefore has the emissivity of metal dust of high reflectance generally all lower, is the first-selected function of thermal infrared frequency rangeFiller. Applicable metal or alloy has Al, Zn, Sn, Au, bronze etc., but actual selecting focuses mostly in function admirable, cheap and easy to getAl.
A kind of form of filler is float type, after referring to that filler mixes with fluid media (medium), can swim in fluid media (medium) tableOn face, after brushing, form a kind of ground, overlapped metal level of being parallel to. This structure has high compactness, therefore byThink and possess the requirement that forms low absorber coatings.
Low infrared emissivity coating is by the filler of extraordinary form (being equivalent to absorption coating absorbent) and adhesiveForm, due to low infrared emissivity coating own characteristic, be greater than 50% high packed space ratio, make filler and adhesive compatibilityPoor, cause can raising with corrosive medium effect in the corrosion process floating coat emissivity that stands salt spray resistance, infrared stealth effectWorsen even and lost efficacy. Aircraft be unable to do without the adverse circumstances such as acid rain, dense fog in long-term use procedure, therefore, researchs and solves lowThe corrosion resistant method of infrared emittance coating, obtains and has important meaning at the stable low emissivity coatings of corrosive environment performanceJustice.
Silane coupling agent KH550 is a kind of compound that can improve interface interaction between polymer and filler. Its one end containsHave the group (ethyoxyl) of the hydrolysis of being easy to, can react with the hydroxyl of metal surface or water and generate covalent bond, the other end contains amino,Can, with polymer by interaction of hydrogen bond, strengthen the boundary strength of copper powder and polymer, from improving the comprehensive of compositeEnergy.
Ethylene propylene diene rubber has good infrared transparent, and ethylene propylene diene rubber decay resistance is good, very suitableBe suitable for the raw material as low infrared emitting paint.
Advantage of the present invention: the coating infrared emittance making is low, and greatly carry through the coating decay resistance of modificationHeight has application prospect very much.
Detailed description of the invention
Below by embodiment, the present invention is further illustrated.
Embodiment mono-:
80 parts of polyurethane; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 30 parts, floatability sheet Al powder; Floating20 parts, property sheet Cu powder; 20 parts of Silane coupling agent KH550s; 20 parts of dimethylbenzene; 6 parts of cyclohexanes.
The particle diameter of floatability sheet Al powder is at 20~30 μ m, and the particle diameter of floatability sheet Cu powder is at 20~50 μ m.
Embodiment bis-:
80 parts of polyurethane; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 0 part, floatability sheet Al powder; Floating50 parts, property sheet Cu powder; 10 parts of Silane coupling agent KH550s; 10 parts of dimethylbenzene; 4 parts of cyclohexanes.
The particle diameter of floatability sheet Al powder is at 20~30 μ m, and the particle diameter of floatability sheet Cu powder is at 20~50 μ m.
Embodiment tri-:
80 parts of polyurethane; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 50 parts, floatability sheet Al powder; Floating0 part, property sheet Cu powder; 10 parts of Silane coupling agent KH550s; 10 parts of dimethylbenzene; 8 parts of cyclohexanes.
The particle diameter of floatability sheet Al powder is at 20~30 μ m, and the particle diameter of floatability sheet Cu powder is at 20~50 μ m.
Embodiment tetra-:
80 parts of polyurethane; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 20 parts, floatability sheet Al powder; Floating40 parts, property sheet Cu powder; 12 parts of Silane coupling agent KH550s; 20 parts of dimethylbenzene; 4 parts of cyclohexanes.
The particle diameter of floatability sheet Al powder is at 20~30 μ m, and the particle diameter of floatability sheet Cu powder is at 20~50 μ m.
Embodiment five:
80 parts of polyurethane; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 10 parts, floatability sheet Al powder; Floating50 parts, property sheet Cu powder; 16 parts of Silane coupling agent KH550s; 20 parts of dimethylbenzene; 4 parts of cyclohexanes.
The particle diameter of floatability sheet Al powder is at 20~30 μ m, and the particle diameter of floatability sheet Cu powder is at 20~50 μ m.
The preparation method of the low infrared emissivity corrosion-resistant finishes of preparing according to above formula, comprises the following steps:
(1) prepare raw material by following parts by weight;
(2) will in the mixture of floatability sheet Al powder and floatability sheet Cu powder, add cyclohexane, ultrasonic processing30min, then drip after Silane coupling agent KH550, ultrasonic processing 30min at 40 DEG C;
(3) polyurethane and maleic anhydride modified ethylene propylene diene rubber are dissolved in dimethylbenzene, add floatability sheet Al powderAfter floatability sheet Cu powder solution, stir 1h, mixture is coated on to object surface.
Applying coating, on substrate, is put into drying baker and is dried 5h, and in high temperature furnace carrying out property after hot setting 3hCan detect. Adopt ENS302 type infrared emittance tester to record the infrared emittance of coating at 5~14 μ m; Corrosive nature adoptsAdopt electrochemical method to test, test result shows that coating is 0.0893 in the infrared emittance of 5~14 μ m, far below existingLow infrared emissivity coating makes the emissivity of coating.
Electrochemistry Tafel curve can directly be evaluated the complexity of coating corrosion, and corrosion potential is-0.496V to corrodeElectric current is 1,239 × 10-7. Illustrate that coating has excellent decay resistance.
In addition to the implementation, the present invention can also have other embodiments. All employings are equal to replaces or equivalent transformation shapeThe technical scheme becoming, all drops on the protection domain of requirement of the present invention.

Claims (1)

1. a low infrared emissivity corrosion resistant coating, is characterized in that unit serving meter comprises following component by weight: polyurethane80 parts; 120 parts of maleic anhydride modified ethylene propylene diene rubbers; 0~50 part, floatability sheet Al powder and be not 0; Floating0~50 part, property sheet Cu powder and be not 0; 10~20 parts of Silane coupling agent KH550s; 10~20 parts of dimethylbenzene;4~8 parts of cyclohexanes;
The particle diameter of described floatability sheet Al powder is at 20~30 μ m;
The particle diameter of described floatability sheet Cu powder is at 20~50 μ m;
Described coating adopts following steps to be prepared from:
(1) will in the mixture of floatability sheet Al powder and floatability sheet Cu powder, add cyclohexane, ultrasonic processing 30min,
Drip again after Silane coupling agent KH550 ultrasonic processing 30min at 40 DEG C;
(2) polyurethane and maleic anhydride modified ethylene propylene diene rubber are dissolved in dimethylbenzene, add floatability sheet Al powder and floatAfter buoyancy sheet Cu powder solution, stir 1h, mixture is coated on to object surface.
CN201210445508.3A 2012-11-09 2012-11-09 Low infrared emissivity corrosion resistant coating Active CN102977726B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106634069A (en) * 2016-11-23 2017-05-10 西南科技大学 Preparation method of brown material with low infrared emitting ability
CN106634136A (en) * 2016-11-23 2017-05-10 西南科技大学 Preparation method of black low-infrared-emissivity material
CN106614196A (en) * 2016-12-15 2017-05-10 浙江海洋大学 Purse net double-layer big-small net mesh safety redundancy enhancing technology
CN109536133B (en) * 2018-12-21 2021-10-01 北京圣盟科技有限公司 Graphene-based infrared stealth composite material and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
8-14μm波段低发射率涂料的制备与优化研究;余慧娟等;《兵器材料科学与工程》;20081130;第31卷(第6期);第49-52页 *
低红外发射率涂层(LIREC)的组成结构与性能研究;邵春明;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20100601;第7页第1.4.1.1节,第25页第3.2.2节至第27页第3段,第29页第3.2.2节,第33页第3.3.4.2节至第36页第3.3.6节,第40页表3.5,第63页第5.6节,第80页第5.9.1节至第83页第5.10节,第92页第6.2.2.2节至第93页第6.3节 *

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