《有机硅氧烷封端聚氨酯密封胶化学.ppt》由会员分享，可在线阅读，更多相关《有机硅氧烷封端聚氨酯密封胶化学.ppt（25页珍藏版）》请在三一办公上搜索。
1、有机硅氧烷封端聚氨酯密封胶化学,Organofunctional Silanes-General Structure,Hydrolysis and Condensation:A More Realistic Scenario,Hydrolysis of The Silanes Alkoxy Groups,Important factors for hydrolysis pH-value concentration type of catalyst temperature solvent organofunctional group alkoxyfunctional group:-OMe-OEt
2、,Y-(CH2)3-Si(OR)3,Silane reactivity to inorganic materials,Silica,Quartz(白碳黑,石英)GlassAluminum,CopperAlumino-Silicates(Clays)(粘土)Mica(云母)TalcInorganic Oxides(e.g.TiO2,Fe2O3,ATH,MGH etc.)Steel,IronAsbestosNickel,Zinc,LeadChalk(CaCO3)(碳酸钙)Gypsum(CaSO4)(硫酸钙)Barytes(BaSO4)Graphite,Carbon Black(碳黑),Reacti
3、vity of Various SubstratesTowards Organofunctional Silanes,Principal Silane Markets,AdhesivesCoatingsElastomersElectronicsFiberglassFoundryMineral Filler TreatmentSealantsPolyolefin CrosslinkingEtc.,Principal Silane Markets,Silanes Market Segments,Adhesives&SealantsArchitectural CoatingsWood Coating
4、s-Clear VarnishElastomers(Tire and Shoe Sole Applications)Electronics(EMC)Fiber glassCopper Foil LaminationFoundry Mineral filler TreatmentPolyolefin Crosslinking,Silanes Market Segments,The Chemistry Behind Organofunctional Silanes,Rheinfelden,Germany,Production process Chemical reactions Hydrolysi
5、s and condensation Reaction with the substrate Reaction with the organic matrix General mode of action Adhesion promotion Crosslinking Surface modification Drying,What Effects are Generated?,Chemical bridge generated at the organic and inorganic interfacePrevents moisture penetration to the interfac
6、eTransfer strength from inorganic filler to resinImproves dispersion of fillers/lower resin viscosity Modify surface characteristics(waterproofing),What Effects are Generated?,Silanes in Resin Synthesis(e.g.Latex),Organic resin monomers and silanes,Silane modified resin with available Si(OR)3 groups
7、 for further reactivity,Advantages:-water resistance-adhesion-scrub resistance-chemical resistance,Dynasylan:-VTMO-VTEO-MEMO,Impact of pH on Silane Stability and Reactivity,硅烷改性PUD 乳液(Epoxysilanes),侧链硅氧烷改性WPU的研究硅氧烷含量影响,Fig.2-6 The particle size and its distributions of the dispersions of WUPU-siloxa
8、ne,Fig.2-7 The shear viscosities of the dispersions of WUPU-siloxane,Fig.2-8 Gel content of the WUPU-siloxane films,Fig.2-9 Water absorption of the WUPU-siloxane films,粒径,粘度,凝胶含量,吸水率,5%硅氧烷吸水率 11.2%,11,Table 2-2 The mechanical properties of the WUPU-siloxane films,Fig.2-10 Tensile behavior of the WUPU-siloxane films,拉伸性能,12,Thank you for your attention,
