Intshayelelo
Kwishishini leemoto lanamhlanje,i-polyurethane (i-PU) izixhobo zidlala indima ebalulekileyo ekufezekiseni uyilo olukhaphukhaphu, ukuphucula intuthuzelo, kunye nokuphucula ukuqina. Ukususela kwizitulo zeemoto kunye needeshibhodi ukuya kwiintloko zentloko kunye neenkqubo zokukhusela isandi, izinto ze-polyurethane zifumaneka phantse kuzo zonke iikona zesithuthi. Emva kokusebenza kakuhle kwezi zinto kukho umqhubi oyintloko weekhemikhali.—ii-polyurethane catalystI-polyurethane catalyst ilawula izinga lokuphendula phakathi kwee-isocyanates kunye nee-polyols, ngaloo ndlela iqinisekisa ukuba isicelo ngasinye seemoto sifezekisa iipropati zoomatshini nezomzimba ezifunekayo.
Zintoni iiIiCatalysts zePolyurethane?
Iikhatalyst zePolyurethane zizinto zeekhemikhali ezikhawulezisa impendulo phakathi kweepolyols kunye nee-isocyanates ngexesha lokwenziwa kwefoam. Ngaphandle kwee-catalysts, izinga lokuphendula kwe-polyurethane beliza kuba licotha kakhulu okanye lingalawuleki kwimveliso yemizi-mveliso. Ngokulungisa uhlobo kunye nobungakanani be-catalyst, abavelisi banokulawula ngokuchanekileyoukugaya, ukugqwalakunye ukunyanga iinkqubo zokufumana amagwebu anobulukhuni obuthile, ukuthamba, kunye nozinzo.
Iintlobo ezimbini eziphambili ze-polyurethane catalysts ezisetyenziswa kwishishini leemoto zezi:
Ii-amine catalysts—isetyenziselwa kakhulu ukukhuthaza impendulo ephuma amagwebu (impendulo ye-isocyanate yamanzi) kwaye ilinganise i-curve yokunyuka kwe-foam kunye nesakhiwo seseli. Umzekelo, ii-catalysts ze-tertiary amine ezifana ne-MXC-A1 (BDMAEE) kunye ne-MXC-37 ziphumela ekunyukeni kwe-foam okugudileyo kunye nokusasazwa kweeseli okufanayo.
Iikhatalyst zesinyithi—ii-catalysts ezisekelwe kwi-tin, ezifanai-dibutyltin dilaurate (MXC-T12) kwayei-stannous octoate, khawulezisaimpendulo ye-gelation (impendulo ye-polyol-isocyanate), ngaloo ndlela ikhawulezisa ukuphiliswa nokuphucula amandla oomatshini. Kwiinkqubo zokusingqongileyo, inoveliiikhatalyst zesinyithi ezingezizo i-tin zisetyenziswa ngakumbi ukunciphisa ukukhutshwa komoya kunye nobutyhefu.
Izicelo eziphambili zeemoto zePolyurethane Catalysts
1. Izitulo zeemoto kunye neentloko
I-foam ye-polyurethane eguquguqukayo yeyona nto isetyenziswa kakhulu ekubekeni izihlalo zeemoto nakwiindawo zokubeka iintloko.I-MXC-A33or I-MXC-BDMA kunceda ekulawuleni uxinano kunye nokuqina kwefoam, ukuqinisekisa intuthuzelo kunye nokuqina rhoqo. Inkqubo ye-catalyst elinganisiweyo inika isiphumo esihle kakhuluukuhamba kwamanzi kwangoko, ulwakhiwo lweseli olufanayo,kwaye ukubuyisela uxinezeleko kakuhle iipropati, ezisetyenziselwa ukuvelisa izihlalo zeemoto ezilungelelanisiweyo.
2. Iideshibhodi kunye namavili okuqhuba
Iifoam ze-polyurethane eziqinileyo nezingenamibhobho zisetyenziswa kakhulu kwiideshibhodi nakwiivili zokuqhuba. Ezi zinto kufuneka zidibanise ukuguquguquka kunye nozinzo olulinganayo. Iikhatalyst ezifanaI-MXC-R70 kwayeI-MXC-B20 zisetyenziselwa ukulawula ukulibaziseka kwe-viscosity yangaphambili ngelixa ziqinisekisa ukuphiliswa okuqinileyo kwe-back-end. Oku kuphumela kwi-umphezulu wefoam ogudileyokwaye ukunamathela okugqwesileyo kwi-substrate, nto leyo ephucula ubuhle kunye nokuziva uchukumisekile.
3. Ulawulo lwe-NVH (Ingxolo, Ukungcangcazela, kunye noBurhalarhume)
I-polyurethane foam sisixhobo esisebenza kakuhle kakhulu esifunxa isandi nesithomalalisa ukungcangcazela, esisetyenziswa kakhulu kwiiphaneli zeminyango, kwii-headliner, nakwi-insulation yomgangatho.I-MXC-41kwaye I-MXC-TMA qinisekisa ukubumba kwefoam ngokuchanekileyo kunye nolwakhiwo lweseli oluhambelanayo, ngaloo ndlela kuphucula ukusebenza kwesandi kunye nokusebenza kobushushu.
4. Iingubo kunye neeAdhesives zeMoto
Kwicandelo leengubo kunye neeglu zezithuthi, ii-catalysts ze-polyurethane ezifanaI-MXC-T9kwaye I-MXC-T12 Ukukhawulezisa ukudibana kunye nokuphilisa, ngaloo ndlela kuphucula ukunamathela, ukukhazimla, kunye nokumelana neekhemikhali. Iifomyula ezifanelekileyo ze-catalyst ziqinisekisa ukoma ngokukhawuleza kweengubo kunye namandla afanelekileyo okunamathela kwe-adhesive kwiimeko ezahlukeneyo zobushushu.
Imigaqo yokusebenza yePolyurethane Catalysts kwiMveliso yeeMoto
Ukwakheka kwePolyurethane kubandakanya iimpendulo ezimbini eziphambili zeekhemikhali:
Impendulo yeGelling:Phakathi kwe-isocyanate kunye ne-polyol, okwenza unxibelelwano lwe-urethane kunye nokunika amandla.
Impendulo Evuthelayo:Phakathi kwe-isocyanate namanzi, kuvelisa i-carbon dioxide ukuze yenze igwebu.
A inkqubo yokulungisa elinganiselekileyoiqinisekisa ukuba ezi mpendulo zimbini zenzeka ngesantya esilawulwayo. Ii-amine catalysts zikhuthaza impendulo yokuvuthuza, ngelixa ii-metal catalysts zikhawulezisa i-gelation. Ukudibanisa okuchanekileyo kuvumela i-foam ukuba yande kakuhle ngaphandle kokuwa, ngelixa inyibilika ngokwaneleyo ukuze ifezekise ukusebenza okuphezulu koomatshini.
Kwimveliso yeemoto, iiparameter zenkqubo ezifanaubushushu, ukufuma, kunye nomlinganiselo wokuxubazijongwa ngokusondeleyo ukuze kuphuculwe ukusebenza kakuhle kwe-catalyst. Injongo kukufezekisa iipropati ze-foam ezihambelanayo, ukukhutshwa okuncinci komoya, kunye nokuzinza kokusebenza kwexesha elide.
Iingenelo zokusebenzisa iiCatalysts zePolyurethane eziSebenza ngokuPhezulu
Ulawulo Oluchanekileyo:Lungisa ixesha lokugqwala nokupholisa izinto ezahlukeneyo zeemoto.
Ivumba Eliphantsi Nokukhupha Umoya:Izinto ezibangela uxinezeleko zanamhlanje ezifanaI-MXC-R40kwayeI-MXC-70zibonelela nge-VOC ephantsi efanelekileyo kwiindawo zangaphakathi zeemoto ezinobuhlobo nokusingqongileyo.
Ukuhambelana:Isebenza kuzo zombiniI-HFCkwayeIinkqubo zeearhente zokuvuthela ze-HFO, ukuxhasa iindlela zokuvelisa ezizinzileyo.
Ukuqina Okuphuculweyo:Yomeleza ukuqina kwefoam, ukunamathela, kunye nokumelana nobushushu ixesha elide lobomi bezinto.
Isiphelo
Iikhatalyst zepolyurethane zezona qhawe zingaziwayo ezibangela intuthuzelo, ukhuseleko, kunye nokuqina kweemoto zanamhlanje. Ngokulawula amazinga okusabela kunye nolwakhiwo lwefoam, ziqinisekisa ukuba zonke izihlalo, iiphaneli, kunye nomgangatho wobushushu zihlangabezana nemigangatho engqongqo yeemoto. Njengoko ishishini litshintshela kwiuyilo olukhaphukhaphukwaye imveliso eluhlaza, ii-catalysts ze-polyurethane ezisebenza kakuhle nezikhupha umbane kancinci ziya kuqhubeka nokudlala indima ekukhuthazeni ukuveliswa kwezinto ezintsha.
Ixesha lokuthumela: Novemba-05-2025