聚氨酯材料手册
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PUCPolyurethane CoatingPUC is a tough, flexible, modified polyurethane conformal coating, specifically designed for the protection of electronic circuitry. PUC has excellent mechanical and dielectric properties.∙High abrasion resistance; ideal for applications requiring a robust coating∙Solvent resistant coating even when room temperature cured; also resistant to acids and alkalis∙Excellent adhesion operating over a wide temperature range; protects against thermal shocks∙Can be reworked using specialist removal product, Electrolube CCRGApprovals RoHS Compliant (2015/863/EU): YesMIL Approval (MIL-1-46058C): Meets approvalIPC-CC-830: Meets approvalDEF-STAN 59/47: Meets approvalLiquid Properties Appearance: Clear amber liquidDensity @ 20°C (g/ml): 0.90 (Bulk), 0.870 (Aerosol)VOC Content: 63% (Bulk) 66% (Aerosol)Flash Point: 38°C (Bulk), -4°C (Aerosol)Solids content: 37% (Bulk), 34% (Aerosol)Viscosity @ 20°C (mPa s): 150 - 240Touch Dry: 40 - 45 minutesRecommended Drying Time: 24 hours @ 20°C180 minutes @ 65°C90 minutes @ 80°CCoverage @ 25µm: 14m2 per litre (Bulk), 5m2 (400ml Aerosol)Dry Film Coating Colour: Clear amberOperating Temperature Range: -55°C to +130°CFlammability: Meets UL94-V0Thermal Cycling (MIL-1-46058C): Meets approvalCoefficient of Expansion: 100ppmDielectric Strength: 60 kV/mmDielectric Constant: 3.6Surface Insulation Resistance: 1 x 1015ΩDissipation Factor @ 1MHz, 25°C: 0.01Moisture Resistance (MIL-1-46058C): Meets approvalDescription Packaging Order Code Shelf LifePUC Conformal Coating 400ml Aerosol PUC400 36 Months5 Litre Bulk PUC05L 24 Months Polyurethane Thinners 5 Litre PTH05L 36 Months Conformal Coating Removal Gel 1 Litre CCRG01L 36 MonthsDirections for UsePUC can be sprayed, dipped or brushed. The thickness of the coating depends on the method of application (typically 25-75 microns). Temperatures of less than 16°C or relative humidity in excess of 75% are unsuitable for the application of PUC. As is the case for all solvent based conformal coatings, adequate extraction should be used (refer to MSDS for further information).Substrates should be thoroughly cleaned before coating. This is required to ensure that satisfactory adhesion to the substrate is achieved. Also, all flux residues must be removed as they may become corrosive if left on the PCB. Electrolube manufacture a range of cleaning products using both hydrocarbon solvent and aqueous technology. Electrolube cleaning products produce results within Military specification.Spraying – BulkPUC needs to be diluted with the appropriate thinners (PTH) before spraying. The optimum viscosity to give coating quality and thickness depends on the spray equipment and conditions, but normally a dilution ratio of 5:1 to 2:1 (PUC:PTH) is required. Suitable spray viscosity is typically 50-80mPa s. If bulk coating material has been agitated, allow to stand until air bubbles have dispersed. PUC is suitable both for use in manual spray guns and selective coating equipment.The selected nozzle should enable a suitable even spray to be applied in addition to suiting the prevailing viscosity. The normal spray gun pressure required is 274 to 413 kPa (40 - 60 lbs/sq.inch). After spraying, the boards should be placed in an air-circulating drying cabinet and left to dry.Spraying - AerosolWhen applying PUC in aerosol form care must be taken to ensure the can is not shaken before use. Shaking the can will introduce excessive air bubbles and will give a poor coating finish. The can should be held at 45° and 200mm from the substrate to be coated. The valve should then be depressed when the can is pointing slightly off target and moved at about 100mm/s across the target. To ensure the best coating results are achieved try to use a smooth sweeping motion with small overlap for successive rows.To ensure penetration of the coating beneath the components and in confined spaces, spray the assembly from all directions to give an even coating. After spraying, the boards should be placed in an air-circulating drying cabinet and left to dry.Dip CoatingEnsure that the coating material in the container has been agitated thoroughly and has been allowed to stand for at least 2 hours for all the air bubbles to disperse.Polyurethane Thinners (PTH) should be used to keep the PUC coating at a suitable viscosity for dipping (150-300mPa s @ 20°C). PTH is added periodically as the solvent evaporates. The viscosity should be checked using a viscosity meter or "flow cup".The board assemblies should be immersed in the PUC dipping tank in the vertical position, or at an angle as close to the vertical as possible. Connectors should not be immersed in the liquid unless they are very carefully masked. Electrolube Peelable Coating Masks (PCM/PCS) are ideal for this application.Leave submerged for approximately 10 seconds until the air bubbles have dispersed. The board or boards should then be withdrawn slowly (1 to 2s/mm) so that an even film covers the surface. After withdrawing, the boards should be left to drain over the tank or drip tray until the majority of residual coating has left the surface. After the draining operation is complete, the boards should be placed in an air-circulating drying cabinet and left to dry.BrushingEnsure that the coating material has been agitated thoroughly and has been allowed to settle for at least 2 hours. The coating should be kept at ambient temperature.When the brushing operation is complete the boards should be placed in an air-circulating drying cabinet and left to dry.InspectionPUC contains a UV trace, which allows inspection of the PCB after coating to ensure complete and even coverage. The stronger the reflected UV light, the thicker the coating layer is. UV light in the region of 375nm should be used for inspection.Revision 3: November 2018。
聚氨酯手册摘要:一、聚氨酯简介1.聚氨酯的定义2.聚氨酯的特点3.聚氨酯的分类二、聚氨酯的合成与生产1.聚氨酯的合成原理2.聚氨酯的主要原料3.聚氨酯的生产工艺三、聚氨酯的应用领域1.聚氨酯泡沫的应用2.聚氨酯弹性体的应用3.聚氨酯涂料的应用4.聚氨酯纤维的应用四、聚氨酯的性能与改性1.聚氨酯的力学性能2.聚氨酯的耐热性能3.聚氨酯的耐候性能4.聚氨酯的改性方法五、聚氨酯的发展趋势与展望1.新型聚氨酯材料的研发2.聚氨酯的可持续发展3.聚氨酯行业的市场前景正文:聚氨酯是一种有机高分子材料,具有优异的弹性、耐磨性、耐腐蚀性和耐高低温性能,被广泛应用于各个领域。
本文将对聚氨酯的简介、合成与生产、应用领域、性能与改性以及发展趋势与展望进行详细阐述。
一、聚氨酯简介聚氨酯是由含有氨基甲酸酯基(-NHCOO-)的有机化合物通过缩聚反应生成的高分子材料。
它具有高强度、高韧性、耐磨、耐油、耐化学腐蚀等特点,可广泛应用于泡沫、弹性体、涂料、纤维等领域。
二、聚氨酯的合成与生产聚氨酯的合成主要基于有机二醇与有机二异氰酸酯的反应。
其中,二醇作为聚氨酯的软段,赋予聚氨酯弹性;二异氰酸酯作为聚氨酯的硬段,赋予聚氨酯强度。
聚氨酯的生产工艺主要有溶液法、预聚体法、熔融法等。
三、聚氨酯的应用领域聚氨酯具有广泛的应用领域,包括泡沫、弹性体、涂料、纤维等。
其中,聚氨酯泡沫广泛应用于冰箱、冷库、建筑等领域;聚氨酯弹性体可用于汽车轮胎、密封件等;聚氨酯涂料可用于家具、家电、建筑等表面的装饰与保护;聚氨酯纤维可用于纺织、服装等领域。
四、聚氨酯的性能与改性聚氨酯的性能主要包括力学性能、耐热性能、耐候性能等。
为满足不同应用领域的需求,可通过化学改性、物理改性等方法对聚氨酯进行改性。
例如,通过引入纳米材料、有机硅等对聚氨酯进行改性,可提高其耐热性能、耐候性能等。
五、聚氨酯的发展趋势与展望随着科技的进步,聚氨酯材料的研究与开发不断深入。
未来,新型聚氨酯材料将朝着可持续、高性能、多功能等方向发展。
聚氨酯手册
聚氨酯手册是一本介绍聚氨酯材料的参考书,其中可能包含以下内容:
1. 聚氨酯的定义和分类:介绍聚氨酯的基本概念和分类方法。
2. 聚氨酯的合成和反应机理:详细介绍聚氨酯的合成方法和反应机理。
3. 聚氨酯的性能和应用:介绍聚氨酯的物理、化学和机械性能,以及其在各个领域的应用。
4. 聚氨酯的加工和成型:介绍聚氨酯的加工和成型方法,包括注射成型、挤出成型、压延成型等。
5. 聚氨酯的质量控制和检测:介绍聚氨酯的质量控制和检测方法,以确保产品质量。
6. 聚氨酯的安全和环保:介绍聚氨酯的安全和环保问题,以及相应的解决措施。
7. 聚氨酯的未来发展趋势:展望聚氨酯的未来发展趋势和应用前景。
这只是一个大致的框架,具体的内容可能会因手册的不同而有所差异。
凯伦MPU聚氨酯防水涂料产品使用说明书一、产品简介1.涂料颜色调配成白色。
凯伦公司生产的聚氨酯防水涂料严禁添加“焦油”(黑色)、“古马隆”(咖啡色)等致癌物质作为原材料,通过配方原材料的调整和优化,研发并生产出环保型白色聚氨酯防水涂料,以便于客户通过观察颜色辨识。
深色(黑色、咖啡色)的聚氨酯涂料,具有添加焦油和古马隆的空间和嫌疑(可降低成本)白色聚氨酯防水涂料的施工(白色、无法添加上述深色有害杂质) MPU涂料呈现白色,涂刷在灰色的基面上时,通过色差即可初步判断材料厚度,见下图,为解决涂料成膜局部厚度不达标的质量通病提供了简易办法。
2.立面施工具有抗流挂性能。
在立面施工时,涂料施工往往因为流坠而产生厚度严重不均匀,该现象是建筑最为常见的质量通病。
本课题拟通过配方优化,研发立面施工时流坠性较小,同时易于刮涂施工的立面抗流挂型MPU涂料。
(详见问题四)普通聚氨酯防水涂料MPU涂料(抗流挂)3.消除涂膜断面的气泡。
聚氨酯防水涂料施工中,一次性刮涂较厚时,涂料成膜后的断面上会夹杂大量气泡,本课题拟尝试优化配方,以减少或避免涂料成膜后断面夹杂大量气泡的质量通病。
4.低温环境下通过研发配套辅材和施工配套工具加以完善。
如:冬季施工时,涂料固化周期相对较长,可通过添加配套促凝剂,以缩短固化成膜时间;冬季施工时,涂料较稠,难以搅拌,可通过加热毯加热的方式解决。
配套促凝剂,可缩短涂料成膜时间冬季施工时,加热毯加热涂料5.粘贴瓷砖可靠。
立面后续施工需粘贴瓷砖(或抹灰)时,可施工最后一遍MPU涂料时,在涂料表面拍干燥的中、细砂,成膜后即可进行后续施工,其耐水性极为优越,避免了在干湿循环的情况下聚合物水泥防水涂料易出现的泡水后性能下降,导致瓷砖空鼓的现象。
6.避免“蒸汽渗透”。
MPU聚氨酯防水涂料隔汽性能优良,用于浴室、卫生间和茶水间等有隔汽性要求较高部位时,可有效避免邻近墙体内墙腻子出现起皮、返碱(内墙壁纸出现开裂、发霉)等质量通病。
聚氨酯保温材料说明建筑业用聚氨酯硬泡体保温材料是聚氨酯工业的一个重要分支,其特点是一材多用,同时具备保温、防水等功能。
该类产品自上世纪60年代在欧洲建筑业应用以来已有40年历史,一些国家还通过立法把聚氨酯作为建筑业指定的保温防水用材。
近年来,随着我国建筑节能市场的迅速发展,聚氨酯硬泡体保温产品在建筑保温防水领域得到了广泛的应用,已成为主导市场的保温节能产品之一。
聚氨酯(即聚氨基甲酸酯,英文缩写PU)是在高分子主键上含有许多重复的—NHCOO—基团的高分子化合物。
聚氨酯系列产品一般是由二元或多元有机异氰酸酯和多元醇在多种助剂的作用下,经过聚合反应得到的高分子化合物,两种主材中若都只含两个或以下羟基官能团时,聚合反应得到的是线型结构的化合物,若其中一种或两种主材中,部分或全部具有三个或以上官能团时,则可得到体型结构的聚合物,由于聚合物的结构不同,性能差异很大。
就像钢材一样,虽然都是铁碳合金,但铁碳配比不同,热处理工艺不同,其性能截然不同。
聚氨酯原料在各行业应用非常广泛,因应用的行业特性和生产的产品不同,各行业对以聚氨酯为主要原料的组合材料的性能要求也不同。
承担保温防水双功能的聚氨酯硬泡(SPF)也完全不同于用于冰箱、冷库仅起保温作用的聚氨酯(PUR),尽管它们外观结构看似非常相像,但作为建筑保温防水一体化材料,聚氨酯硬泡打破了传统建材功能单一、防水的不保温、保温的不防水、防水层一旦出现渗漏、保温层随即失去保温功能的通病。
与其它单功能保温或防水材料相比,聚氨酯硬泡具有明显的优势:1.聚氨酯硬泡具有一材多用的功能,同时具备保温、防水、隔音、吸振等诸多功能;2.保温性能卓越,是目前国内所有建材中导热系数最低(≤0.024,绿色环保无氟发泡技术)、热阻值最高的保温材料,导热系数仅为EPS发泡聚苯板的一半;3.聚氨酯硬泡体连续致密的表皮和近于100%%的高强度互联壁闭孔,具有理想的不透水性。
采用喷涂法施工达到防水保温层连续无接缝,形成无缝屋盖和整体外墙保温壳体,防水抗渗性能优异;4.超强的自粘性能(无需任何中间粘结材料),与屋面及外墙粘结牢固,抗风揭和抗负风压性能良好;5.整体喷涂施工,完全消除“热节”和“冷桥”;6.柔性渐变技术可有效阻止防水层开裂;7.机械化作业、自动配料、质量均一、施工快周期短;8.化学性质稳定,使用寿命长,对周围环境不构成污染;9.离明火自熄,且燃烧时只炭化不滴淌,炭化层尺寸和外形基本不变,能有效隔断空气的进入,阻止火势的蔓延,防火安全性能好。