聚氨酯合成工艺.ppt

文档介绍：聚氨酯合成工艺PuIntroductionPuwholecalledpolyethylenecarbamate,iscontainedinthemolecularstructureoftheunit—NHCOO—theunitbyhigh-pounds,andhydroxylreactionsystem,reactiveisasfollows:—N=C=O+HOˉ→—NH-COOˉInthe1970s,,PUastextilefinishingagentinEurope,,duetothepeopleenvironmentalprotectionconsciousnessenhancementandtheenvironmentalprotectionlawsandregulations,'s,PUPUfabricrapiddevelopment,,,,,Sometimesuse"one-step"-called"one-step"willbepolyols,isocyanateandextenderchainreaction,,everyoneknowsthatalltheingredients,panyeasilyabsorbingpolyetherinshippingduringdrying,,,,monlydiisocyanateas454'-ErBenJimethanediisocyanate(MDI)andtoluenediisocyanate(TDI),(2,4-diflooronitrohenzene,DIisomersinvariousmixingratioofmixture).Terathanecanalsowithspecialdiisocyanatereaction,suchasPPDI,inordertoimprovetheperformanceandabrasionresistance,,,theycanbeTerathane?reaction,,whenthefinalproduct,