Ishishini le-polyurethane belisoloko lixhomekeke kwii-catalysts ezisekelwe kwi-tin ngenxa yendima yazo esebenzayo ekukhawuleziseni ukusabela kunye neenkqubo zokunyanga. Nangona kunjalo, iinkxalabo zokusingqongileyo kunye nempilo ziye zabangela ukukhangela ezinye iindlela ezifanelekileyo. Enye indawo ethembisayo yile:I-MXC-B20, i-bismuth carboxylate catalyst enika iingenelo ezininzi kunee-catalysts zemveli ezisekelwe kwi-tin.
Kutheni Ucinga Ngezinye Iindlela Ezingasetyenziswayo Kwi-Tin Catalysts?
Iikhatalysts ezisekelwe kwi-tin, ezifana ne-dibutyltin dilaurate (DBTDL) kunye ne-stannous octoate, zisetyenziswa kakhulu kwimveliso ye-polyurethane. Nangona zisebenza kakuhle, ezi khatalysts zibeka umngcipheko omkhulu kwindalo nakwimpilo. Zinokuba yingozi kwaye zihlala zinxulunyaniswa nemiqathango yemithetho, nto leyo eyenza kube yimfuneko kubavelisi ukuba bahlole iindlela ezikhuselekileyo.
I-MXC-B20: I-Bismuth CarboxylateIsikhanyisi
I-MXC-B20 yi-bismuth carboxylate catalyst entsha eyenzelwe ukujongana neengxaki ze-catalysts ezisekelwe kwi-tin. Le catalyst isebenza njenge-cocatalyst ene-tertiary amines, iphucula iimpendulo ze-polyurethane kunye neenkqubo zokuphilisa. Apha'Jonga ngokusondeleyo into eyenza i-MXC-B20 ibe yeyona ndlela ingcono:
1. Ubuhlobo nokusingqongileyo:
I-MXC-B20 ayinazo izinto ezinobungozi ezifana ne-2-ethylhexanoic acid (2-EHA), i-dibutyltin (DBT), kunye ne-tributyltin (TBT). Oku kuyenza ibe lukhetho olunobuhlobo nokusingqongileyo xa kuthelekiswa nee-catalysts zemveli ezisekelwe kwi-tin, ezihambelana neemfuno ezikhulayo zomthetho nezemarike zefomyula ezikhuselekileyo zeekhemikhali.
2. Ukusebenza Okuphuculweyo:
Xa i-MXC-B20 iphantsi, inyusa i-viscosity yangaphambili yemixube ye-polyurethane, ngaloo ndlela yandisa ixesha lokuhamba. Olu phawu luluncedo ngakumbi njengoko luvumela ulawulo olungcono ngexesha lezigaba zokuqala zokucubungula ngelixa luqinisekisa ukucocwa kakuhle kwe-back-end.
3. Ukuguquguquka:
Le catalyst iyahambelana neepolyols zefoam eziqinileyo nezithambileyo eziqhelekileyo, nto leyo eyenza ukuba ifaneleke kwiintlobo ngeentlobo zezicelo zepolyurethane. Nokuba yifoam yebhloko eguquguqukayo, ifoam eguquguqukayo enobunzima obuphezulu, ifoam yokutshiza, ifoam yemicrocellular, okanye iinkqubo zefoam eqinileyo, iMXC-B20 ibonakalisa ukuba yi-catalyst eguquguqukayo nesebenzayo.
4. Enye indlela engenazitya:
Ngokutshintsha ii-catalysts ezisekelwe kwi-tin nge-MXC-B20, abavelisi banokunciphisa kakhulu umngcipheko weemveliso zabo kwindalo esingqongileyo. Le ndlela ingenazo i-tin ikwanciphisa umngcipheko wetyhefu, ikhuthaza indawo yokusebenza ekhuselekileyo kunye nemveliso yokugqibela.
5. Iziphumo ezithelekiswayo okanye eziBalaseleyo:
Nangona ingekho i-tin, i-MXC-B20 ayiphazamisi ukusebenza kwayo. Amandla ayo okusebenza njenge-cocatalyst ene-tertiary amines aqinisekisa ukuba inkqubo yokunyanga isebenza kakuhle kwaye iyasebenza, idla ngokuvelisa iziphumo ezifanayo, okanye ezingcono kunezo zifunyenwe ngee-catalysts ezisekelwe kwi-tin.
Isiphelo
Utshintsho oluya kwii-catalysts ezikhuselekileyo nezinobuhlobo nokusingqongileyo luphawu olubalulekileyo kwishishini le-polyurethane. I-MXC-B20, eneempawu zayo ezikhethekileyo kunye neenzuzo, ivela njengendlela enomtsalane kunee-catalysts zemveli ezisekwe kwi-tin. Ukuhambelana kwayo noluhlu olubanzi lwee-polyols, kunye nokusebenza kwayo okuphuculweyo kunye neziqinisekiso zokusingqongileyo, kuyenza ibe lukhetho olugqwesileyo kubavelisi abafuna ukuvelisa nokuphucula iimveliso zabo ze-polyurethane. Ukwamkela i-MXC-B20 akupheleli nje ekuhambelaneni neemfuno zomthetho kodwa kukwakhuthaza uzinzo kunye nokhuseleko kwimveliso ye-polyurethane.
Ixesha lokuthumela: Agasti-06-2024