DDI, CAS: 68239-06-5 Dimeryl Diisocyanate, Dimeryl-di- isocyanate
DDI waa diisocyanate aliphatic gaar ah oo lagu dari karo xeryahooda firfircoon ee ka kooban hydrogen si loo diyaariyo polymers.Waa silsilad silsilad dheer leh oo leh 36-kaarboon oo laf dhabarta aysiidh dufanaysan.Qaab dhismeedka silsiladda ugu weyn wuxuu siinayaa DDI dabacsanaan sare, caabbinta biyaha iyo sunta hoose marka loo eego isocyanates kale oo aliphatic ah.DDI waa dareere aan fiicneyn, si fududna ugu milmi kara inta badan dareerayaasha polar ama non-polar.Sababtoo ah waa isocyanate aliphatic, waxay leedahay sifooyin aan huruud ahayn.
Waa maxay isticmaalka iyo faa'iidada DDI?
DDI waxaa loo isticmaali karaa in lagu diyaariyo polymers leh laba ama in ka badan oo isku dhafan hydrogen firfircoon, kuwaas oo loo isticmaali karo in lagu diyaariyo poliurethane (urea) elastomers leh sifooyin gaar ah, daaweynta wakiilada ee gantaalaha adag, xabagta, daboolka, dhamaystirka dusha sare ee dharka, warqad, maqaar iyo dhar. Wakiilka biyaha-ilaalinta, alaabta elektaroonigga ah, wakiilka daweynta alwaax, iwm.
1. DDI waxay leedahay rajooyin codsi ah oo ku saabsan daaweynta ka hortagga biyaha dharka iyo waxqabadka jilicsan.Way fududahay in la sameeyo emulsion biyaha deggan oo leh biyo, kaas oo ku siin kara dhar dabacsanaan dheer;sida biyo-celinta dharka, waxay leedahay saameyn wanaagsan oo biyo-celin ah waxayna sidoo kale hagaajin kartaa saameynta biyaha dharka iyo saliidda.
2. Xakamaynta polyurethane iyo resins polyurea ee laga sameeyay DDI waxay leeyihiin jaale aan jaale ahayn, dabacsanaan aad u fiican iyo ductility, xoog sare, dareenka biyaha hoose, iyo caabbinta abrasion wanaagsan, caabbinta dareeraha kiimikada iyo iska caabinta heerkulka hooseeya.
3.DDI waxay leedahay iswaafajin heer sare ah iyo falcelin leh polybutadiene hydroxyl-la joojiyay, iyo polymer-ka la diyaariyey iyada oo aan caag-cagadeeyaha lahayn ayaa leh engegnaan aan caadi ahayn oo hooseeya.
4. DDI-ku-salaysan polyurea-ku-salaysan waxay si fiican ugu dheggan yihiin birta iyo alwaax, iyada oo aan lahayn dildilaacyo, waxayna muujinayaan sifooyin jilicsan oo aad u fiican, sifooyinka adhesion iyo caabbinta cimilada.
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