共查询到19条相似文献,搜索用时 62 毫秒
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水溶性氨基丙烯酸漆的研制 总被引:7,自引:0,他引:7
研制了高温烘烤 (145~ 15 0℃ )和中温烘烤 (12 0~ 12 5℃ )两种水溶性氨基丙烯酸漆。当羟基树脂的玻璃化温度为 - 5~ 0℃ ,丙烯酸和丙烯酸羟乙酯占总单体的质量分数分别为 7 5 %~ 8 5 %和 8 0 %~ 12 0 % ,羟基树脂和氨基树脂的质量比为 (0 0 5∶1 0 0 )~ (0 10∶1 0 0 ) ,颜基质量比为 0 2 9∶1 0 0时 ,两种漆的附着力达到 1级 ,抗冲击强度 >490N·cm ,柔软性 <1mm ,硬度 >2H ,光泽度 >80 (45℃ ) ,耐水 (2 0~ 2 5℃ ) 1d以上 ,遮盖力及施工性能良好 相似文献
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介绍水溶性酚醛漆的研制方法,以水为溶剂,丁醇为助溶剂,氨水为中和剂,环境污染小,产品价格低廉,施工方便,有推广应用价值。 相似文献
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无机富锌漆,是指以无机物为粘合剂,加以增塑剂、防沉剂、流平剂、触变剂、锌粉等。按传统涂料分类方法属 E 类(其它涂料)。无机富锌漆过去以碱式硅酸盐(高模数水玻璃)为基料,因其物化性能、施工性能及附着力存在着缺陷,现被硅酸乙酯或其低聚物为主要成膜物的漆料代替,本文对后一种涂料作以介绍。 相似文献
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汽车底盘用水溶性环氧酯漆浸涂工艺 总被引:1,自引:0,他引:1
文章较系统地介绍了汽车底盘用黑色水溶性环氧酯浸涂漆涂装线布置设计及工艺。叙述了浸涂工艺施工参数、管理方式、漆膜性能及改进方向。 相似文献
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鉴于生物质直接燃烧和生物质与煤混合燃烧发电过程排放细颗粒物表面通常含有一定量的可溶无机盐,基于经典异质核化理论,综合考虑晶核生长的表面扩散和直接沉积机制建立了改进的蒸汽在包含球形不可溶核和可溶无机盐的细颗粒物表面的异质核化模型,利用数值模拟方法,对4种组分颗粒(不可溶颗粒以及3种含可溶无机盐的颗粒)的异质核化特性进行对比分析。结果表明,在中等接触角条件下,不可溶颗粒的临界晶核形成自由能和临界晶核半径最大,含KCl颗粒次之,含NaCl颗粒再次之,含CaCl2颗粒最小;临界晶核条件下,表面扩散机制与直接沉积机制引起的水分子添加速率之比随颗粒半径的增大先略有增加而后保持不变,随接触角的增大而单调下降。研究还发现,当接触角较小时,含可溶无机盐颗粒的成核临界饱和度低于不可溶颗粒;当接触角较大时,含KCl和NaCl颗粒的成核临界饱和度先后超过不可溶颗粒。 相似文献
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鉴于生物质直接燃烧和生物质与煤混合燃烧发电过程排放细颗粒物表面通常含有一定量的可溶无机盐,基于经典异质核化理论,综合考虑晶核生长的表面扩散和直接沉积机制建立了改进的蒸汽在包含球形不可溶核和可溶无机盐的细颗粒物表面的异质核化模型,利用数值模拟方法,对4种组分颗粒(不可溶颗粒以及3种含可溶无机盐的颗粒)的异质核化特性进行对比分析。结果表明,在中等接触角条件下,不可溶颗粒的临界晶核形成自由能和临界晶核半径最大,含KCl颗粒次之,含NaCl颗粒再次之,含CaCl2颗粒最小;临界晶核条件下,表面扩散机制与直接沉积机制引起的水分子添加速率之比随颗粒半径的增大先略有增加而后保持不变,随接触角的增大而单调下降。研究还发现,当接触角较小时,含可溶无机盐颗粒的成核临界饱和度低于不可溶颗粒;当接触角较大时,含KCl和NaCl颗粒的成核临界饱和度先后超过不可溶颗粒。 相似文献
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Recent developments in rubber-toughened structural acrylic adhesives now offer sheet steel fabricators the opportunity to replace conventional metal fastening techniques such as spot welding with lower cost, durable, more versatile structural adhesive bonding. These developments, in particular much improved ability to bond oily/waxy surfaces common to the motor car industry and improved retention of fracture toughness after exposure to paint stoving temperatures, are discussed in this paper. 相似文献
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The water‐soluble conjugated polyelectrolyte poly{2,5‐bis[3‐(N,N,N‐triethylammoniumbromide)‐1‐oxapropyl]‐1,4‐phenylenevinylene} (P2) was synthesized and the influences of different inorganic salts on the optical properties of the polyelectrolyte were studied. New absorption and emission peaks at longer wavelength can be observed in the case of P2 with addition of different concentrations of Cl? or NO3?, whereas addition of I? or ClO4? only induces a red shift. Interestingly, addition of SO42? or F? does not result in considerable changes in optical spectra. Through UV‐visible spectrometry, photoluminescence, 1H NMR and cyclic voltammetry, we showed that the nature of the inorganic salts brings these different changes. The special structure of the bond of NO3? and the large electronegativity of chlorine lead to an electron transfer between the conjugated polymer and the negative ions. The large radius of I? and the weak electron withdrawing ability of ClO4? only bring a red shift of optical spectra. In addition, SO42? and F? do not affect the spectra significantly, except that the fluorescence intensity falls slightly indicating that P2 is not sensitive to these ions. Copyright © 2011 Society of Chemical Industry 相似文献
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Conducting polythiophene films hundreds of micrometers thick was first obtained by electrochemical polymerization of thiophene in freshly distilled BF3-diethyl ether solution at stainless steel electrode. The tensile strengths of these films were much higher than those of some widely used engineering plastics such as polypropylene and poly(vinyl acetate). These films can be easily cut by conventional mechanical methods into a variety of structures like a metallic sheet. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1027–1029, 1998 相似文献