Ukuthi kuyini:
Ipoliyuthane (PU) ngaphakathi: PU yintlango enguquleyo esiyazi kakhulu ngemibuzo ethunyelwe kulesi sikhathi sesikhathi. Ukhuseleka ngokuba ungenzi, icala kunye nokulawula kuya kumntu. Ungathola PU ngemibhalo angithintelela njengemini lokuphuma, okuyenza ukukhala ngezinye izinto zethunywa, uphethu olungena amasayensi, ubheqe olubeka amagama amahhadi, umphathisi wemoto olubeka imilondolozi yakho yokugcwalisa, kunye nekhaulingi elungena amanye amagaga. Iicatalisti zinenzela lokuthi zingenelelwa ipoliyuthane efumanekayo ngokukhululeka. Zinentsha amanani apha aphumeleyo ezifundzisayo iproducts ye-PU ngokungenzi, icala kunye nokuhlola. Ngoku, bheka phambi kokuthi uqhabele lokuthi iincwadi ezizizo zazisebenza ngokukhululeka kwiipoliyuthane ezinhloko zabo kunye nokuhlobene.
Umvume Womncedisi Wesiphumo Sempilo
Isibhedlela sokuthengisa ipoliyurithane inakwazi kakhulu ngokusebenzisa amakhathalasi, ngoba amakhathalasi aziphindaphinda izifundo ezichasene zezinto eziphambili. Ngeke amakhathalasi, uprosesu wakupoliyurithane kungabhekisele isikhatsi esiphephileyo, kunye nokuba umgenisi obuya kufuneka akufinyelele ngaphandle kokuthi ufumane okudingekayo. Amakhathalasi abhekelela ukuthenga kwemibuzo wehluku lokulandelwa. isikompuni Sesi-Organo-tin lolu cwaningo lungenziwa ngokuba lingavumelela iimibuzo zeqhutyandaba labe ngenqanawe kubuyela kwezintsha. Lokhu libonisa ukuba imibuzo afunyeneyane apha kanye nokuhlola. Lokhu lilandelayo ligcinisela ukuthi imibuzo ayiqhutyandaba ngqukuze kube kuhluke kakhulu, kunye nokuba umoya owenza ipoliyurithane ubuye kuvela ngoku kuhluke kakhulu, futhi umbala wesilayithi usetyenziswa sibuye kuhluke kakhulu.
Amakhathalasi Akudala Lendaweni yokuthengisa Ipoliyurithane:
I-Lingshi iyindlela yamakhathalasi yokuthengisa ipoliyurithane yokugcina izinto ezinethengiswa yipoliyurithane. Le tetrabutyl iimetal zikhethela ngokulungileyo kwisezantsi lokuphakamisana, zingabuyeleya izidingo, kunye nokuthola ukuncedwa kweqinisekiso ngquku. Umphathisi waseTin yehlukene ngeLingshi umphathisi. Lumphathisi uluhle kakhulu ngokubuyisela isicatshululo esiqhathanise kunye nePolyol. Usebenzisa ngokugcina ukwakhiwa kwesizezi sokuphakamisana kunye nokuphindekelwa okusemva kweentsiliso ezifanekiso neebhukayezelo, ezithethwa njengecushonise, amapayenti, amaphuca kunye nokuvumelekelayo. Lokunye kwiimbizo bomthombo kunye nokufikisana kweendaweni, ubungakanani bokuba kwaye benyuka kweendaweni ezibekelwe ngokukhona umsebenzi omkhulu.
Umphathisi wesibini uhlala kumphathisi weBismuth. Yinkxaso yokugcina eliphambili kunye nokubuyiselwa kwisezantsi lokuphakamisana kunye nokuphindekelwa okusemva kweentsiliso ezifanekiso neebhukayezelo — ngokuphelele yiintlobo nokuthi zisebenzisayo ukubuya iindlela zokuthintiswa amafILTER zeNtlo. Ngokuqondisiswa, yinto engcono kakhulu ngenxa yokuba lemphathisi weBismuth unoma icure time ngquku kunye nokuba usebenzisa ngemvula enye, lokunye kwiintsingo zokusebenza.
Imvume Emtsha Ukubonisa Amagcinisi Akhatho Ngenqanawe Kakhulu
Ngokushesha kwezilungiselelo ezidingeki lwezopolimari, izikhatlasi esisodwa soPU zikhona ngokumangazeleyo, njengamagcinisi we-Lingshi esihlangene nesi-Tin nesi-Bismuth, zifuneka kuhlala kuhluke ukufakwa kwamagcinisi akhatho. Ukugcina okanye ukusetyenziswa kwezi zikhatlasi zakufuneka zeziphumelele ukuba amagcinisi akhatho azikhethwe ngaphandle komoya omkhulu nokuba ziziphandla kakhulu. Zingabizisisa ngokukhangela izigama zezinto eziphumayo. Lento yokulula yiphumelela ukuba imibuzo ebizwa ngokwesicwangciso zibe ngaphambili kubalulekileyo ukuphinda ukusetyenziswa kokubhalela nokubheka, ukuba amaxwebhu amandla nokuba ziziqhaza kakhulu kunye nomva phakathi kwezinye izinto. Ukuba lokho liphumelela kufuneka le nto iphumelele ukuba amaxwebhu akhatho aziphinde aphinde aziphumelele ukuba ziziphandla kakhulu. organo-tin amaxwebhu akhatho azisebenzisa ukwenyusha kulo kuloo mncedo kwiimbali
Ngokuqondile:
Ngokuqo, iimhlabalumbi lokuphela zaseLingshi ezithileyo kuthuthukise ukusetha izipolifayurethane ezidingekayo. Iimhlabalumbi zihlala ngokuba nge-Tin okanye nge-Bismuth nokuthuthukisa ukuba le ndlela alingene ngquku kwe-isocyanate kunye nepolyol. Ziziphakamisana, zibonisa, kunye neziphumaphumeleyo ukuthi zikhona eminingi wezipolifayurethane. Ukusetshenziswa kwale mahlaba kuthuthukise amagcinisi wabafaki wezipolifayurethane ukuba ziyathatha imibono yezindlela yokugcina, ubungakanani, nokubuyiselwa kunye nokuphakamiswa, ezi zidingeka ukuthi zikwazi ukufaka izinkqubo ezicacileyo emakhwenyeni.
