I-Toluene Diisocyanate (CAS 26471-62-5): Izinto zelitye lembombo eziqhuba ukuqhubela phambili kweshishini lePolyurethane kunye notshintsho oluzinzileyo

I-Toluene diisocyanate (TDI, CAS 26471-62-5), ikhemikhali ebalulekileyo ye-organic esetyenziswa kakhulu kwikhonkco lexabiso le-polyurethane yehlabathi, iyaqhubeka nokuxhasa ukukhula kumacandelo okuvelisa, ukwakha, iimoto, ifenitshala kunye namacandelo oshishino. Iqhutywa yimigaqo-nkqubo engaphantsi kwekhabhoni, ukuphuculwa kwetekhnoloji kunye nokuguquka kwemfuno yemarike yokugqibela, icandelo le-TDI lingena kwinqanaba elitsha lophuhliso oluluhlaza, olusebenza kakuhle kakhulu kunye nolunexabiso eliphezulu.

Njengekhompawundi ye-diisocyanate esebenza kakhulu, i-TDI iveliswa ngokuyintloko njengomxube wee-isomers ze-2,4 kunye ne-2,6. Ipholimitha ngokulula ngee-polyols ukwenza izinto ze-polyurethane ezibonisa ukuthamba okugqwesileyo, ukumelana nokuguguleka, uzinzo lwemozulu kunye nokusebenza kobushushu. Ezi mpawu zenze i-TDI ibe yinto eluhlaza engenakutshintshwa kwizicelo ezininzi zoshishino.

Ngaphezulu kwama-70 ekhulwini okusetyenziswa kwe-TDI kwihlabathi liphela kusetyenziswa i-polyurethane foam eguquguqukayo, esebenza njenge-cushion engundoqo yoomatrasi, iisofa, izihlalo zeemoto kunye ne-acoustic insulation. Ezinye izicelo eziphambili ziquka ukugqunywa okuphezulu, izitywino zokwakha, izincamathelisi zemizi-mveliso, ii-polyurethane elastomers, ulusu oludibeneyo kunye nee-membrane zokuthintela amanzi. Imfuno isaqhubeka izinzile phakathi kokukhula kwezixeko, ukuphuculwa kweendawo zokuhlala kunye nokukhanya kweemoto.

Ukuphendula kwimigaqo engqongqo yokusingqongileyo nokhuseleko, eli shishini likhawulezise ukwamkelwa kweenkqubo zemveliso ezicocekileyo nezikrelekrele ngakumbi. I-phosgenation eqhubekayo ephucukileyo, ukubuyiswa kobushushu obumdaka kunye neetekhnoloji zokulawula ukukhutshwa komoya ezivaliweyo ziye zanciphisa kakhulu ukusetyenziswa kwamandla kunye nokukhutshwa komoya ongcolileyo ngeyunithi nganye yemveliso. Uphando malunga neendlela ezingezizo ze-phosgene kunye ne-TDI esekwe kwi-bio-based mass-balanced luye lwenza inkqubela phambili enkulu, lwehlisa i-carbon footprints kwaye luxhasa iinjongo zoqoqosho olujikelezayo.

Ukunikezelwa kwempahla kwihlabathi liphela kunye nokuguquguquka kwemfuno kuye kwanda ngokulungeleleneyo kwiminyaka yakutshanje. Ukuphuculwa kwamandla kunye nemveliso edibeneyo kuphucule uzinzo lokusebenza kunye nokukhuphisana ngeendleko. Ukunyuka kwamanani okuthumela kwamanye amazwe kuye kwanda ukungena kwemarike yamazwe ngamazwe, ngelixa imfuno esezantsi iye yahlukahluka ukuya kwiingubo ezisebenza kakuhle, ii-composites zeemoto, izixhobo zamandla amatsha kunye nee-polymers zodidi lwezonyango.

Njengekhemikhali enobungozi exhomekeke kwimithetho engqongqo yothutho nokuphathwa kwehlabathi, imboni ye-TDI igcina ulawulo oluqinileyo lokhuseleko kuyo yonke imveliso, indawo yokugcina, uthutho kunye nokusetyenziswa kwayo. Iinkqubo zokusebenza ezisemgangathweni, iimfuno zezixhobo zokuzikhusela kunye neenkqubo zokuphendula ngexesha likaxakeka ziyasetyenziswa ngokubanzi ukuqinisekisa impilo emsebenzini kunye nokhuseleko lokusingqongileyo.

Ukujonga phambili, i-TDI iya kuhlala ibalulekile kushishino lwe-polyurethane lwehlabathi. Ukuqhubeka nokuvelisa izinto ezintsha kwimveliso eluhlaza, ukucocwa okucocekileyo okuphezulu kunye nezixhobo ezisekelwe kwi-bio kuya kuphucula ngakumbi amandla ayo okusetyenziswa. Ixhaswa yimfuno ezinzileyo yemarike kunye nemigaqo-nkqubo yophuhliso oluzinzileyo, i-TDI ikulungele ukubonelela ngexabiso lexesha elide ngelixa iqhubela phambili utshintsho oluphantsi lwekhabhoni kumacandelo eekhemikhali kunye nokuvelisa aphambili.