Yintoni iMetal Catalyst?
A isiqalelo sesinyithiyi-compound equlethe ii-athomu zesinyithi ezenza kube lula ukusabela kweekhemikhali ngaphandle kokutyiwa kwinkqubo. Kwimveliso ye-polyurethane, ii-catalysts zesinyithi zikhawulezisa ukusabela okubalulekileyo njengokwenziwa kwe-urethane (i-polyol-isocyanate reaction) kunye ne-urea (i-water-isocyanate reaction). Ii-catalysts zesinyithi ziphucula ukusebenza kakuhle, zinciphisa ixesha lokuvelisa, kwaye ziqinisekisa iipropati zomzimba nezekhemikhali ezifunwayo ze-polyurethane foam.
Uhlu lweeMetal Catalysts
Iikhatalyst zesinyithi zahlulwe ngokubanzi ngokusekwe kulwakhiwo lwazo lweekhemikhali, ukusebenza kwazo, kunye nohlobo oluthile lwesinyithi. Nazi iindidi eziphambili:
1. IiCatalysts ezisekelwe kwiTin
Umzekelo: I-MXC-T12(DBTDL)I-Dibutyltin dilaurate, i-Tin octoate.
Izicelo: Isetyenziswa kakhulu kwi-polyurethane foams, i-coatings, i-adhesives, kunye ne-sealants.
Iipropati: Umsebenzi ophezulu wokubangela i-catalytic kwi-reaction ye-polyol-isocyanate. Ihlala inxulunyaniswa neenkxalabo zokusingqongileyo kunye nobutyhefu.
2. IiCatalysts ezisekelwe kwiBismuth
Umzekelo: I-MXC-B20 (i-Bismuth carboxylate catalyst).
Izicelo: Enye indlela yokulungisa izinto ezisebenzisa i-tin kwiifoam eziqinileyo neziguquguqukayo endaweni yee-catalysts ezisekelwe kwi-tin.
Iipropati: Ayinabungozi kwaye inobuhlobo nokusingqongileyo. Isebenza kakuhle xa ifuna ivumba eliphantsi kunye nokukhutshwa komoya okuphantsi. Ikhuthaza ukunyangwa kakuhle kwe-back-end kunye nokwakheka kwe-viscosity okulibazisekileyo.
3. IiCatalysts ezisekelwe kwiZinc
Umzekelo: I-Zinc neodecanoate.
Izicelo: Iifoam eziguquguqukayo, ii-elastomers, kunye neengubo.
Iipropati: Ixabiso eliphantsi kunye nomsebenzi omncinci wokutsala. Isetyenziswa rhoqo kwiifomyula apho kufuneka ukhetho oluphezulu.
4. IiCatalysts ezisekelwe kwiTitanium
Umzekelo: Iialkoxide zeTitanium.
Izicelo: Iingubo, izinto zokutywina, kunye nezinto zokuncamathelisa.
Iipropati: Umsebenzi onamandla wokutsala amandla kwiimpendulo ezithile. Ayixhaphakanga kakhulu kwi-polyurethane foam ngenxa yexabiso eliphezulu.
5. IiCatalysts zeBismuth-Tin okanye zeMixed-Metal
Umzekelo: Iindibaniselwano ze-bismuth kunye ne-tin catalysts.
Izicelo: Isetyenziselwa ukulinganisela ukusebenza kunye neendleko ngelixa inciphisa ubuthi.
Iipropati: Iziphumo ezihambelanayo zokuphucula iiprofayili ezithile zokusabela.
6. Ezinye iiCatalysts zeMetal
Imizekelo: Ii-catalysts ezisekwe kwi-aluminium, i-cobalt, i-manganese, okanye i-iron.
Izicelo: Usetyenziso olukhethekileyo lwe-niche kwiingubo okanye kwii-elastomers.
Iipropati: Zibonelela ngeenzuzo ezikhethekileyo ezifana nokuzinza kobushushu obuphezulu okanye ukukhetha impendulo ethile.
I-MXC-B20: I-Bismuth Carboxylate Catalyst njengeSithabathi seTin-Based
I-MXC-B20 yi-i-catalyst yesinyithi se-bismuth carboxylateYenzelwe njengendlela eyahlukileyo enobuhlobo nokusingqongileyo endaweni yeekhatalysts zemveli ezisekwe kwitini. Isetyenziswa kwi-polyurethane foams ukukhuthaza:
- Ukwakheka kwe-Viscosity eLibazisekileyo
inika ulawulo olungcono ngexesha lokuqala kokwenziwa kwegwebu. - Unyango Oluphuculweyo Lokubuyela Emuva:Iqinisekisa iipropati zokugqibela ezomeleleyo ngaphandle kokubeka emngciphekweni uzinzo lokucubungula.
- Ubuhlobo kwiNdalo: Ayinazo iikhompawundi zemercury, i-lead, kunye ne-tin, ihambelana nemigaqo engqongqo yokusingqongileyo.
- Ukuguquguquka:Ihambelana neepolyols eziqinileyo nezithambileyo, nto leyo eyenza ukuba isetyenziswe kwiifoams eziqinileyo, iifoams ezinoxinano oluphezulu, kunye neenkqubo ze-microporous.
Iingenelo zeBismuth Catalysts kuneTin Catalysts
Ukunciphisa ubuthi kunye nefuthe eliphantsi kwindalo esingqongileyo. Ivumba eliphantsi kunye nokukhutshwa komoya kwimveliso yokugqibela. Uzinzo oluphezulu kwiifomyula zamanzi.
Ukuqukumbela, ii-catalysts zesinyithi ezifana ne-MXC-B20 zidlala indima ebalulekileyo ekuphuculeni imveliso ye-polyurethane ezinzileyo nesebenza kakuhle ngokubonelela ngezinye iindlela kuneenkqubo zemveli ezisekelwe kwi-tin.
Ixesha leposi: Novemba-26-2024