Indima yeMetal Catalyst MXC-B20 kwi-Polyurethane Reactions

I-MXC-B20, ekwaziwa ngokuba yi-bismuth carboxylate catalyst MB20, sisithako esinamandla se-polyurethane esisetyenziselwa ukuphucula ukusabela kwe-polyurethane kunye nokuphilisa. Njenge-carboxylate esekelwe kwi-bismuth, i-MXC-B20 isebenza njengei-cocatalyst yesinyithioko kudla ngokudibaniswa nee-amines ezintathu. Olu dibaniso lwenza ukuba kukhawuleze ukuphiliswa, nto leyo eyenza ukuba kube lolunye uhlobo olusebenzayo kwiikhatalysts zemveli ezisekelwe kwi-tin, ezisetyenziswa rhoqo kwiibhloko eziguquguqukayo, iifoam eziguquguqukayo ezinobunzima obuphezulu, ii-spray coatings, iinkqubo ze-microporous, kunye nokusetyenziswa kwe-foam eqinileyo.

Iingenelo zeI-MXC-B20

I-catalyst ye-MXC-B20 izisa iingenelo ezininzi kwishishini le-polyurethane:

1. Ukusebenza Okuphuculweyo: I-MXC-B20 yi-polyurethane eqinileyo okanye i-gelled metal catalyst ebambezela ukwakheka kwe-viscosity yangaphambili kwiidosi eziphantsi, kodwa ikhuthaza ukuphiliswa okuphezulu kwe-back-end. Esi siphumo sokulibaziseka sivumela ulawulo olungcono kwinkqubo yokuqala yokusabela ngelixa siqinisekisa iipropati zokugqibela ezilungileyo ze-foam.

2. Ulwakhiwo Olunobuhlobo Nokusingqongileyo: Ekubeni ingenazo iintsimbi ezinobungozi ezifana ne-mercury, i-lead, kunye ne-dibutyltin, i-MXC-B20 inika enye indlela ekhuselekileyo nenobuhlobo nokusingqongileyo kunezinye ii-catalysts zesinyithi zemveli. Ikwanokuguquguquka okuncinci kunye nevumba elincinci, nto leyo enegalelo kwindawo yokusebenza ekhuselekileyo nemnandi.

3. Ukuhambelana: I-catalyst iyahambelana ne-polyols ze-foam eziqinileyo nezithambileyo, nto leyo eyenza ukuba ibe nokuguquguquka kwiifomyula ezahlukeneyo ze-foam, iqinisekisa ukuhlanganiswa okuthambileyo kwiinkqubo zokuvelisa ezikhoyo.

Usetyenziso lwe-MXC-B20

I-MXC-B20 idlala indima ebalulekileyo ekukhawuleziseni ii-reactions apho ixesha lokunyanga lisenokunganeli ngee-amine catalysts zodwa. Ukudibanisa i-MXC-B20 kunye ne-amine catalyst kuvumela amaxesha okusabela akhawulezileyo kunye neempawu eziphuculweyo ze-foam. Oku kuye kwenza ukuba ibe lukhetho olukhethwayo kwiintlobo ngeentlobo zezicelo, ezinje:

- IiFoams eziqinileyo zesakhiwo ezinobunzima obuphezulu: Ekuveliseni izinto ezifuna ukuqina namandla, iMXC-B20 iqinisekisa ukunyameka ngokukhawuleza ngaphandle kokuphazamisa ukuthembeka kwefoam.

- Ukufakwa Kodonga Oluqinileyo Lwesitshizi: Esi sitshizi sikhawulezisa ukuphiliswa kwefoam yesitshizi esiqinileyo esetyenziswa ekufakweni kwesitshizi, sibonelela ngozinzo lobushushu kunye namandla olwakhiwo.

- I-Reactive Injection Molding (RIM): I-MXC-B20 iphucula inkqubo yokusabela kwizicelo ze-RIM, ivumela amaxesha omjikelo akhawulezayo kunye neendawo ezibunjiweyo ezinamandla.

- Iifoam zesikhumba zeMicroporous Monolithic: Kwiinkqubo ezikhethekileyo apho i-microporosity ibalulekile, i-MXC-B20 iqinisekisa ulwakhiwo oluhambelanayo lwefoam kunye nomgangatho.

Amandla e-MXC-B20 okukhuthaza iipropati zefoam ezibalaseleyo ngelixa ephepha ukusetyenziswa kweentsimbi eziyingozi ayenza ibe yinto exabisekileyo ekuvelisweni kwe-polyurethane yanamhlanje.