Ii-catalysts ze-polyurethane zidlala indima ebalulekileyo ekwenziweni kwee-polyurethanes, zisebenza njengamandla aqhubayo emva kwee-chemical reactions ezenza ezi zinto ziguquguqukayo. Phakathi kwee-catalysts ezahlukeneyo ezikhoyo, i-MXC-T120 ivelele njengokhetho olunamandla nolusebenzayo kwiintlobo ngeentlobo zezicelo ze-polyurethane, ukusuka kwi-foam yokutshiza ukuya kwi-polyurethane eqinileyo kunye neemveliso zokubumba eziguquguqukayo eziphezulu. Ukuqonda umsebenzi wee-catalysts ze-polyurethane kunye neenzuzo zeI-MXC-T120Kubalulekile ekwenzeni ngcono iinkqubo zemveliso kunye nokufezekisa ukusebenza kakuhle kwezinto.
I-catalyst, ngokubanzi, yinto eyonyusa izinga le-chemical reaction ngaphandle kokuyitya kule nkqubo. Kwimeko yokuveliswa kwe-polyurethane, ii-catalysts zibalulekile ekukhawuleziseni i-reaction phakathi kwee-polyols kunye nee-isocyanates, izinto eziphambili ze-polyurethane. Le reaction, eyaziwa ngokuba yi-gelation, yenza i-polymer matrix ye-polyurethane. I-MXC-T120, i-catalyst esekelwe kwi-dibutyltin, isebenza kakuhle kakhulu ekuncediseni le reaction, inikezela ngomsebenzi ophezulu we-catalytic kunye nokuqina kwe-hydrolytic.
Omnye wemisebenzi ephambili yee-catalysts ze-polyurethane ezifana ne-MXC-T120 kukulawula ixesha le-gelling. Ngokukhawulezisa inkqubo ye-gelation, ii-catalysts zinceda ekwenzeni inethiwekhi ye-polymer ezinzileyo ngokukhawuleza nangokufanelekileyo. Oku kubaluleke kakhulu kwizicelo ezifana ne-foam yokutshiza, apho ukucocwa ngokukhawuleza kubalulekile ekugcineni imo kunye nokuqina kwesakhiwo. Ukongeza, i-MXC-T120'Umsebenzi oqinileyo wokutsala umbane uqinisekisa ukusebenza okuzinzileyo nokuthembekileyo kuzo zonke iintlobo ezahlukeneyo ze-polyurethane.
Ngaphandle kokulawula ixesha lokugaya, ii-catalysts zikwadlala indima ebalulekileyo ekulinganiseni ii-side reactions, kubandakanya ukusabela kwamanzi kunye ne-isocyanates ukwenza i-carbon dioxide (CO2) gas. Le reaction ibalulekile kwinkqubo yokufutha, enika iipropati ezinqwenelekayo ezifana nokufakelwa kunye nokuthomalalisa ii-polyurethane foams. Nangona kunjalo, ukwakheka kwegesi okugqithisileyo kunokukhokelela kwiziphene kunye nomgangatho wezinto ezisetyenzisiweyo. I-MXC-T120 igqwesile ekulawuleni ezi side reactions, iqinisekisa ulungelelwaniso olufanelekileyo phakathi kokwakheka kwe-polymer kunye nemveliso yegesi, okubangela ii-foams ezikumgangatho ophezulu ezinesakhiwo seseli esifanayo.
Xa kuthelekiswa nee-amine catalysts, ezithathwe kwi-ammonia (NH3) kwaye zahluka ngomsebenzi ngokusekelwe kwisakhiwo sazo kunye nobume bazo, i-MXC-T120 inika ukusebenza okuphezulu ngokwemeko yozinzo lwe-hydrolytic. Ii-amine catalysts, ingakumbi ii-tertiary amines, zihlala zisetyenziswa ekwenzeni i-foam ngenxa yokukwazi kwazo ukukhuthaza ukwakheka kwe-CO2. Nangona kunjalo, zinokuzisa ukuguquguquka kunye novakalelo kumswakama, okunokuchaphazela uzinzo lwezinto ixesha elide. I-MXC-T120, kunye nokwakheka kwayo kwe-dibutyltin, inika ukumelana okuphuculweyo kwi-hydrolysis, iqinisekisa iimveliso ze-polyurethane ezihlala ixesha elide nezizinzileyo nakwiimeko ezinzima zendalo.
Ukuqukumbela,i-polyurethane catalystI-MXC-T120 sisikhuthazi esinamandla nesiguquguqukayo esiphucula kakhulu ukusebenza kakuhle kunye nomgangatho wemveliso ye-polyurethane. Umsebenzi wayo ophezulu wokutsala, uzinzo oluhle kakhulu lwe-hydrolytic, kunye nokukwazi ukulinganisela iimpendulo ezingalindelekanga kwenza ukuba ibe lukhetho olufanelekileyo kwiintlobo ngeentlobo zezicelo, ukusuka kwi-foam yokutshiza ukuya kwiimveliso zokubumba eziqinileyo neziguquguqukayo. Ngokusebenzisa iingenelo ze-MXC-T120, abavelisi banokufikelela kwizixhobo ze-polyurethane ezigqwesileyo ngokusebenza okuphuculweyo kunye nokuqina.
Ixesha lokuthumela: Agasti-05-2024