DDI, CAS: 68239-06-5 Dimeryl Diisocyanate, Dimeryl-di-isocyanate
O le DDI o se aliphatic diisocyanate tulaga ese e mafai ona tuʻufaʻatasia ma faʻaogaina faʻamalosi hydrogen e saunia ai polymers.Ose fa'aputuga filifili umi ma se ivi ga'o ga'o 36-carbon dimerized i tua.Ole fausaga autu ole filifili e maua ai le DDI sili atu le fetuutuunai, vai faʻafefe ma maualalo le oona nai lo isi aliphatic isocyanates.O le DDI o se vai e maualalo le viscosity, e faigofie ona solu i le tele o polar po'o non-polar solvents.Talu ai ona o le aliphatic isocyanate, e leai ni mea samasama.
O le a le fa'aoga ma le aoga ole DDI?
DDI e mafai ona faʻaaogaina e saunia ai polymers ma lua poʻo sili atu faʻapipiʻi hydrogen malosi, lea e mafai ona faʻaaogaina e saunia ai polyurethane (urea) elastomers ma mea faʻapitoa, faʻamalolo faʻamalolo mo faʻamalosi roketi malo, faʻapipiʻi, faʻamau, faʻamaeʻaina ie, pepa, Paʻu ma ie. fa'asusu vai, mea fa'aeletoroni, vaila'au fa'asusu fafie togafitiga, ma isi.
1. O le DDI o lo'o i ai fa'amoemoega fa'aoga i le togafitiga o le fa'afefe vai ie ma le fa'amaluluina o galuega.E faigofie ona fausia se vai emulsion mautu ma le vai, lea e mafai ona faʻaofuina ie ma fetuutuunaʻi umi;e pei o se ie vai repellent, e i ai se aafiaga lelei repellent vai ma e mafai foi ona faaleleia le aafiaga o se vai ie faavae fluoride ma suauu repellent.
2. Polyurethane resins ma polyurea resins faia mai le DDI e le samasama, e sili ona lelei elasticity ma ductility, malosi maualuga, maualalo vai lagona, ma lelei abrasion tetee, vailaau solvent tetee ma maualalo le vevela.
3.O le DDI e sili ona fetaui lelei ma fa'afoliga fa'atasi ma le hydroxyl-terminated polybutadiene, ma o le polymer saunia e aunoa ma le palasitika e matua'i maualalo le maa'a'a.
4. O pa'u polyurea fa'avae DDI e pipii lelei i u'amea ma fafie, e aunoa ma ni ta'e, ma fa'aalia ai le lelei o mea fa'amalosi, mea fa'apipi'i ma le tau.
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