《硅烷在涂料中的应用 silanes for coatings》由会员分享，可在线阅读，更多相关《硅烷在涂料中的应用 silanes for coatings（61页珍藏版）》请在金锄头文库上搜索。
1、Silanes for Coatings 硅烷在涂料中的应用,Shiu-Chin Cindy Su 蘇黃秀琴 Momentive Performance Materials Shiu-Chin.S 914-784-4905,Company History 公司的历史,1993 Divestiture,2000 Name Change,2003 Acquisition,Late 1950s,2006 Divestiture,Function of Silanes in Coatings 硅烷在涂料中的特殊功能,Adhesion Promotion 增强附着力 Especially between
2、 organic polymers and inorganic oxide substrates 特别是在有机聚合物与无机氧化物之间 Some examples exist for adhesion to nonfunctional organic substrates 在难附着的有机底材上增强附着力 Crosslinking 交联剂 Convert reactive polymers (isocyanate, polyol, polyamine) to moisture cure chemistry 可反应性聚合物具有潮气固化反应的特点 VOC Reduction 减少 VOC Disper
3、sion 帮助分散 Compatibilize high-energy particulates with organic matrices 帮助高能量粒子在有机物中的分散；,Silanes are Dual-Functional Molecules 硅烷是双功能的分子,Organic portion bonds or interacts with a polymer or organic surface.有机基团可以与聚合物或有机表面形成化学键； Silane portion bonds or interacts with metal, glass or inorganic surface
4、(adhesion). 硅烷基团可以与金属，玻璃等无机表面形成化学键； Can react with other silane-modified polymers (crosslinking). 可与其它硅烷改性的聚合物反应（交联）,Hydrolysis and Condensation 水解和缩合反应,1. Hydrolysis Reaction 水解反应,OH,H,2,N(CH,2,),3,Si (OCH,3,),3,H,2,N(CH,2,),3,Si OH + 3 CH,3,OH,(,Silquest,A-1110,silane,),OH,2. Condensation 缩合反应,OH,
5、OH,H,2,N(CH,2,),3,Si OH + HO,Si,H,2,N(CH,2,),3,Si,O,Si,OH,OH,H,2,O,- H,2,O,Surface,silanol,Functionalized,surface,Hydrolysis and Condensation of Organofunctional Silanes pH值对硅烷水解和缩合反应的影响,log k,pH,水解 (kobs, s-1),缩合 (kobs, M-1s-1),E. R. Pohl et. al.,Function of Silanes in Coatings 硅烷在涂料中的特殊功能,Adhesion
6、 Promotion 增强附着力 Especially between organic polymers and inorganic oxide substrates 特别是在有机聚合物与无机氧化物之间 Some examples exist for adhesion to nonfunctional organic substrates 在难附着的有机底材上增强附着力 Crosslinking 交联剂 Convert reactive polymers (isocyanate, polyol, polyamine) to moisture cure chemistry 可反应性聚合物具有潮气
7、固化反应的特点 VOC Reduction 减少 VOC Dispersion 帮助分散 Compatibilize high-energy particulates with organic matrices 帮助高能量粒子在有机物中的分散；,How Does Silane Enhance Adhesion 硅烷增加附着力的化学原理,Metal = Substrate,Match FG with Resin system有机基团与树脂的反应性相匹配,FG = 有机基团,Relative Silane Effectiveness 有机硅烷对 无机材料 的反应性,Silica, Quartz,
8、Glass 石英，玻璃 Aluminum, Alumina 铝材，氧化铝 Copper 铜 Wollastonite 硅酸盐 Aluminosilicates (clays)硅酸铝 Mica云母 Talc 滑石粉 Iron, steel 铁，钢 Asbestos 石棉 Nickel 镍 Zinc 锌 Lead 铅 Calcium carbonate (chalk)碳酸钙 Calcium sulfate (gypsum)硫酸钙 Barium sulfate (baryte)硫酸钡 Carbon black (untreated)碳黑 Graphite 石墨,Excellent 优异Good 好S
9、ome 一般None 无作用,How do you use a Silane? 如何使用硅烷,Two ways 两种方法 ：Primer 作为底涂Integral Blend 添加在涂料中,Primer: Pretreat substrate with silane. Very efficient use of silane for adhesion promotion, not efficient resin crosslinking (minimal stability problem), two step process. 底涂:硅烷对基材预处理，对附着力促进非常有效，不影响树脂的贮存稳
10、定性，两步法底涂涂料。 Integral blend: Mix silane into coating formulation. Much better for crosslinking, also good for adhesion promotion. Possible silane hydrolysis and condensation on storage. Most customers will do it this way. 将硅烷添加到涂料配方中，增加树脂体系的交联密度，同时促进附着力。在储存时，硅烷可能会发生水解和缩合反应，影响储存稳定性。,Typical Primer For
11、mulation 硅烷底涂的参考配方,Primer suitable for an epoxy or urethane system 适用于环氧或聚氨酯涂料： 组份 重量份 Silquest A-1100或A-1120硅烷 5 SDA-30 醇(91.11%乙醇+8.89%甲醇) 40 蒸馏水 Distilled water 5 甲苯 toluene 40 n-丁醇 n-Butanol 5 丁基纤维素Butyl Cellosolve 5,Application of Primer 底涂的应用,Dissolve 0.5-5.0 weight percent silane in a compati
12、ble, volatile solvent (or mixture) 溶解0.5-5.0硅烷于挥发溶剂中 Alcohols are most commonly used, for water compatibility. 对不溶于水的硅烷，通常使用乙醇，以保持与水的相溶性 Equal parts water (based on silane) may be added to prehydrolyze silane if water is compatible with the solvent.加入与硅烷相同量的水来预水解 If primer is to be used immediately,
13、 the solution may be acidified. 如果底涂马上使用，溶液可以是酸性的 Apply to clean, grease-free surface. 涂布于清洁无油的表面 Wiping, spraying, brushing, dipping，擦涂，喷涂，刷涂，浸涂 Film thickness 0.1 mil ， 膜厚2.5 um Solvent removal by drying at 50-60C for 10 min. 在50-60C 烘干10 分钟 Protect surface from contamination and coat within 24 hr
14、. 保持表面无污染并在24小时内涂布后续涂层,Integral Blend Methods 添加的方法,0.5-2% silane added to polymer matrix prior to application在使用前，将0.5-2% 的硅烷添加到聚合物的配方中 Silane may be “soaked into” some polymers硅烷可以浸入到一些聚合物中 Pot life depends on，Pot life取决于 moisture content of matrix polymer 聚合物中潮气含量 reactivity of silane to matrix p
15、olymer硅烷与聚合物的反应性 Silane may be added at compounding stage, e.g. liquid silane pumped into extruder mixing zone 硅烷可以在混合步骤中加入，例如液体硅烷泵入挤出混合阶段,Various Silanes in a Reactive Adhesive 有机硅烷提高附着力,Adhesion to Aluminum (degreased and etched) 附着于铝底材 (去油脂和经清洗） Isocyanate-terminated polyurethane (Uniroyal Adipre
16、ne L-100) 异氰酸酯封端的聚氨酯 (Uniroyal Adiprene L-100) 2% Silane added by Integral Addition 2% 的有机硅烷添加量,T-Peel Strength, pli,Function of Silanes in Coatings 硅烷在涂料中的特殊功能,Adhesion Promotion 增强附着力 Especially between organic polymers and inorganic oxide substrates 特别是在有机聚合物与无机氧化物之间 Some examples exist for adhesion to nonfunctional organic substrates 在难附着的有机底材上增强附着力 Crosslinking 交联剂 Convert reactive polymers (isocyanate, polyol, polyamine) to moisture cure chemistry 可反应性聚合物具有潮气固化反应的特点 VOC Reduction 减少 VOC Dispersion 帮助分散 Compatibilize high-energy particulates with organic matrices 帮助高能量粒子在有机物中的分散,
