密封胶性能指标.pdf

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1、POLYURETHANESEALANTS聚氨酯密封胶HYBRIDSEALANTS混合密封胶Curesundertheeffectofatmospherichumidity湿气下固化Curesundertheeffectofatmospherichumidity湿气下固化GoodadhesiononalotofsubstratesGoodadhesiononalotofsubstrates对大多数材料具有很好的粘对大多数材料具有很好的粘接强度接强度Surfacetreatmentareoftennecessary(cleaner,primer)经常需要

2、表面处理（清洗剂，底涂剂）Surfacetreatmentarelimited(mosthydrolysissensitive)SensitivetoUVradiation(yellowingforwhitereferences)很少需要表面处理（对水解敏感）对紫外线较为敏感（易黄变）UVresistance抗紫外性能Compatibilitywithpaints与涂料兼容性-carryouttestsbeforehandwithsolventbased(alkyde)溶剂型涂Compatibilitywithpaints料需做测试-carryout

3、testsbeforehandwithsolventbased(alkyde)溶剂型涂-OKwithwaterbasedpaint水性涂料兼容料需做测试ContainfreeIsocyanate.Donotcontainsolventorasmall-OKwithwaterbasedpaint水性涂料兼容quantityofsolvent含异氰酸酯自由基，不含溶剂或含少量溶剂Donotcontainisocyanate,PVC,solventApplicationtemperature:5°C–35°C应用温度：5--35不含异氰酸酯，PVC，溶剂S

4、kinformationtime20to240minutes表干时间20-240Applicationtemperature:5°C–35°C应用温度Temperatureresistances:耐温性Lowerskinformationtime较短的表干时间-30°C/+80°C:3M525/3M540Temperatureresistances耐温性-30°C/+90°C:3M550/3M551/3M560/3M590-40°C/+100°C:3M760/3M4000UVReductionofmechanicalperformancesafter

5、50’at160°C.50-160会-30°C/+90°C:3M740降低其机械性能Mechanicalperformancesarenotdegradedafter50’at200°C.Standardsandquality质量标准50-200内不会降低机械性能StandardsandqualitySNJF:3M525/3M540质量标准RoueMarine:3M5403M550/3M551RoueMarine-MarineWheel3M760/3M4000UVHarmful:3M550/3M551/3M560/3M590Notclassified

6、ashazardous不含有毒物质PUcanbeformulatedtoreachhighermechanicalresistance聚氨酯Hybridsaremoreexpensive(processandrawmaterial)混合密封具有更好的机械强度胶价格较高（过程和原材料）Sealantproperties密封胶性能Comparison对比:PUvs.Hybridsvs.Silicones聚氨酯密封胶，混合密封胶，硅酮密封胶
Overview:3MainTypesofSealants:FlexibleElastomers
Silicones

7、PUR’sMSHybrids
GeneralFlexibleVeryFlexibleRelativelystiff
Movement?to20%to25%to15%
Paintable?NoGood*wetonwet1
ReleaseaceticacidCO2*MethanolCH3OH*
AdhesionnotEPDMrubberNeedpretreatingWiderange
RemarksPricing!!Autoindustry!Marketgrowing/Notclassified*Afterskinhasformed表干后1.Neutra

8、lisedonconcrete-doesnotstick与混凝土不发生反应2.CO2causesbubble