O le ā le Metal Catalyst?
A mea fa'agaoioiga u'ameao se fa'aputuga o lo'o i ai ni atoma u'amea e fa'afaigofie ai tali fa'akemikolo e aunoa ma le fa'aumatia i le faagasologa. I le gaosiga o le polyurethane, o mea fa'aola u'amea e fa'avavevave ai tali taua e pei o le fausiaina o le urethane (taliga o le polyol-isocyanate) ma le urea (taliga o le vai-isocyanate). O mea fa'aola u'amea e fa'aleleia atili ai le lelei, fa'aitiitia le taimi o le gaosiga, ma fa'amautinoa ai meatotino fa'aletino ma fa'akemikolo e mana'omia o le polyurethane foam.
Fa'avasegaga o Mea Fa'aola U'amea
O mea fa'aola u'amea e fa'avasegaina lautele e fa'atatau i lo latou fa'atulagaga fa'akemikolo, aoga, ma le ituaiga u'amea patino. O lo'o i lalo fa'avasegaga autu:
1. Mea Fa'aola e Fa'avae i le Apa
Faʻataʻitaʻiga: MXC-T12(DBTDL)Dibutyltin dilaurate, Tin octoate.
Talosaga: E fa'aaogaina lautele i foams polyurethane, coatings, adhesives, ma sealants.
MeatotinoGaioiga fa'a-catalytic maualuga mo le tali atu o le polyol-isocyanate. E masani ona feso'ota'i ma popolega tau le siosiomaga ma mea oona.
2. Mea Fa'agaoioiga Fa'avae i le Bismuth
Faʻataʻitaʻiga: MXC-B20 (Fa'aosofiaga o le Bismuth carboxylate).
Talosaga: E sui ai mea fa'aoso e fa'avae i le apamemea i foam ma'a'a ma fetu'una'i.
MeatotinoE lē oona ma e lē afaina ai le siosiomaga. Aoga i galuega e manaʻomia ai le manogi itiiti ma le kasa e itiiti. E faʻalauiloa ai le faʻamamāina lelei o le pito i tua ma le faʻatupulaʻia o le mafiafia.
3. Mea Fa'aolaola e Fa'avae i le Zinc
Faʻataʻitaʻiga: Zinc neodecanoate.
Talosaga: Foam fetuutuunai, elastomers, ma ufiufi.
MeatotinoTau maualalo ma e fai si mālū o le gaioiga fa'asolo. E masani ona fa'aaogaina i fa'atulagaga e mana'omia ai le maualuga o le filifiliga.
4. Mea Fa'aolaola e Fa'avae i le Titanium
Faʻataʻitaʻiga: Titanium alkoxides.
Talosaga: Mea e ufiufi ai, mea e fa'amaufa'ailoga ai, ma mea fa'apipi'i.
MeatotinoGaioiga malosi fa'aoso mo ni tali fa'apitoa. E seasea ona tupu i le polyurethane foam ona o le taugata.
5. Bismuth-Tin po'o Mea Fa'aoso U'amea Fefiloi
FaʻataʻitaʻigaO le tu'ufa'atasiga o mea fa'aoso bismuth ma le tin.
Talosaga: Fa'aaogaina e paleni ai le fa'atinoga ma le tau a'o fa'aitiitia ai le o'ona.
Meatotino: A'afiaga fa'atasi e fa'aleleia atili ai fa'amatalaga patino o tali atu.
6. Isi Mea Fa'aola U'amea
Faʻataʻitaʻiga: Alumini, cobalt, manganese, po'o mea fa'agaoioi e fa'avae i le u'amea.
TalosagaFa'aoga fa'apitoa i vali po'o elastomers.
Meatotino: Tu'uina atu ni penefiti tulaga ese e pei o le mautu i le vevela maualuga po'o le filifiliga fa'apitoa o tali.
MXC-B20: Bismuth Carboxylate Catalyst e fai ma sui o le apamemea
O le MXC-B20 o semea fa'aoso o le bismuth metal carboxylateua mamanuina o se isi auala e le afaina ai le siosiomaga nai lo mea fa'atupu fa'alavelave masani e fa'avae i le apamemea. E fa'aaogaina i foam polyurethane e fa'alauiloa ai:
- Fa'atupula'ia o le Viscosity
e tuʻuina atu le pulea sili atu i laʻasaga muamua o le fausiaina o le foam. - Fa'aleleia atili o le Fa'amamago i Tua:Fa'amautinoaina meatotino malolosi fa'ai'u e aunoa ma le fa'aleagaina o le mautu o le fa'agasologa.
- Fa'auo i le SiosiomagaE leai se mekuri, apamemea, ma mea e fa'aputu i totonu o le apamemea, e ogatusa ma tulafono fa'atonutonu fa'amalosia o le siosiomaga.
- Fetuuna'igaE fetaui ma polyols malo ma vaivai, e mafai ai ona faʻaaogaina i foams malō, foams mafiafia maualuga, ma faiga microporous.
Aogā o Bismuth Catalysts nai lo Tin Catalysts
Fa'aitiitia le o'ona ma fa'aitiitia ai a'afiaga i le siosiomaga. Fa'aitiitia le manogi leaga ma le fa'asa'olotoina o mea e alu ese mai le oloa fa'ai'u. Tulaga mautu sili ona lelei i fa'aputuga vai.
I le faaiuga, o mea fa'agaoioiga u'amea e pei o le MXC-B20 e taua tele i le fa'aleleia atili o le gaosiga o le polyurethane e gafataulimaina ma maualuga le fa'atinoga e ala i le ofoina atu o isi auala e sui ai faiga masani e fa'avae i le apamemea.
Taimi na lafoina ai: 26-Nov-2024