Cov khoom siv rwb thaiv tsev ua npuas dej tau dhau los ua ib qho thev naus laus zis hauv cov tsev niaj hnub no, nrog rau kev rwb thaiv tsev zoo dua, cua tsis nkag thiab tsis ntub dej. Lub plawv ntawm lub kaw lus rwb thaiv tsev ua haujlwm siab no yog polyurethane ua npuas dej, Ib yam khoom tsim los ntawm kev sib xyaw ua ke ntawm ob lub ntsiab lus tseem ceeb: sab "A" (feem ntau yog polyisocyanate) thiab sab "B", uas yog kev sib xyaw ntawm polyols, catalysts, blowing agents, flame retardants thiab surfactants. Polyurethane catalysts, xws li MXC-BDMA thiab MXC-TMA, ua lub luag haujlwm tseem ceeb hauv kev tsav tsheb cov tshuaj tiv thaiv, ua kom zoo dua cov ua npuas dej thiab xyuas kom meej tias muaj kev ua tau zoo rau ntau yam kev siv rwb thaiv tsev.
Cov Cheebtsam ntawm Sab "B" hauv Cov Tshuab Polyurethane Tsuag
Hauv cov tshuab ua npuas polyurethane (SPF), sab "B" muaj ntau yam khoom ntxiv uas qhia txog kev ua haujlwm ntawm cov khoom kawg. Cov khoom ntxiv no suav nrog:
- Cov PolyolsCov khoom siv tseem ceeb uas cuam tshuam nrog isocyanates los tsim cov polyurethane polymer.
- Cov tshuaj catalystsCov tshuaj sib xyaw ua ke uas ua rau cov tshuaj sib xyaw ua ke ntawm polyols thiab isocyanates sai dua, ua kom muaj kev ua npuas ncauj thiab kho tau zoo.
- Cov Neeg Ua Npuas NcaujCov tshuaj uas pab tsim cov qauv ua npuas ncauj los ntawm kev tsim cov pa roj thaum lub sijhawm ua tshuaj.
- Cov Tshuaj Tiv Thaiv Hluav Taws: Cov tshuaj ntxiv uas txhim kho qhov tiv taus hluav taws ntawm cov ua npuas ncauj.
- Cov tshuaj surfactants: Cov tshuaj uas ua kom cov qauv ua npuas ruaj khov, ua kom cov cell sib xws.
MXC-BDMABenzyl Dimethylamine Catalyst rau Rigid Polyurethane Ua Npuas Ncauj
MXC-BDMA (CAS 103-83-3) yog ib qho tshuaj benzyl dimethylamine uas siv dav hauv kev lag luam polyurethane, tshwj xeeb tshaj yog hauv kev siv ua npuas ncauj tawv. Nws muaj txiaj ntsig zoo hauv kev tsim cov npuas ncauj polyurethane tawv, uas muaj cov khoom rwb thaiv tsev zoo heev thiab kev ruaj khov ntawm cov qauv thiab feem ntau siv los tsuag ua npuas ncauj rwb thaiv tsev.
Cov txiaj ntsig tseem ceeb ntawm MXC-BDMA hauv cov tshuab ua npuas dej muaj xws li:
Kev ua kom cov kua dej thaum ntxov zoo dua: MXC-BDMA ua kom ntseeg tau tias cov khoom sib xyaw polyurethane tswj tau qhov fluidity zoo thaum lub sijhawm pib ntawm cov txheej txheem foaming, cia nws ntws tau yooj yim thiab sau cov qhov sib txawv lossis qhov chaw tsis sib xws.
Cov qauv ntawm tes sib xws: Cov tshuaj catalyst ua rau cov npuas me me sib npaug hauv cov ua npuas, ua li no thiaj li txhim kho kev rwb thaiv tsev thiab ua kom muaj kev ruaj khov ntawm lub cev. Cov qauv ntawm lub cell sib npaug kuj pab cov ua npuas tswj tau qhov cua nruj tas mus li, uas ua rau kev txuag hluav taws xob ntawm kev rwb thaiv tsev zoo dua.
Muaj zog nplaum rau cov substrates: MXC-BDMA pab txhim kho qhov kev sib txuas ntawm cov ua npuas ncauj thiab ntau yam khoom siv, xws li ntoo, hlau thiab pob zeb. Qhov no ua kom cov ua npuas ncauj txau lo rau ntawm qhov chaw uas siv, txawm tias nyob rau hauv qhov chaw nyuaj.
MXC-TMACatalyst rau Polyisocyanurate Foam Systems
Lwm yam tshuaj catalyst tseem ceeb hauv cov tshuab polyurethane txau yog MXC-TMA (CAS 75-50-3), uas yog ib qho tshuaj catalyst ua los ntawm trimethylamine uas tsim nyog rau cov tshuab ua npuas polyisocyanurate (PIR). PIR ua npuas zoo ib yam li polyurethane ua npuas, tab sis cov mis no muaj cov isocyanates ntau dua. Qhov kev hloov kho no ua rau cov npuas ruaj khov dua thiab tiv taus hluav taws, ua rau nws yog qhov kev xaiv dav rau cov ntawv thov rwb thaiv tsev uas qhov kev tiv taus hluav taws tseem ceeb heev.
MXC-TMA pab txhawb rau PIR systems hauv ntau txoj hauv kev tseem ceeb:
Kev sib raug zoo nrog PIR systems: MXC-TMA yog tsim los rau cov qauv ua npuas polyisocyanurate kom ua tau zoo rau kev ua kom cov tshuaj tiv thaiv thiab xyuas kom meej tias cov npuas kho tau zoo thiab huv si.
Kev tiv thaiv hluav taws zoo dua: PIR ua npuas ncauj muaj zog tiv taus hluav taws zoo dua li cov ua npuas ncauj polyurethane txheem. Kev siv MXC-TMA hauv PIR cov qauv ua rau cov yam ntxwv no zoo dua, ua rau nws yog qhov kev xaiv rau kev siv hauv cov chaw kub hnyiab lossis kub heev.
Kev tsim ua npuas ncauj ruaj khov: Ib yam li MXC-BDMA, MXC-TMA ua kom cov ua npuas dej tsim cov qauv cellular zoo sib xws, uas yog qhov tseem ceeb rau kev tswj cov khoom rwb thaiv tsev ntawm cov khoom siv mus sij hawm ntev.
Cov ua npuas dej PIR uas muaj MXC-TMA feem ntau siv rau hauv kev lag luam ru tsev, kev rwb thaiv tsev phab ntsa, thiab lwm yam kev siv rwb thaiv tsev uas xav tau kev rwb thaiv tsev thiab kev tiv thaiv hluav taws.
Qhov Tseem Ceeb ntawm Cov Catalysts hauv Kev Rwb Thaiv Ua Npuas Ncauj
Xaus lus, cov tshuaj polyurethane catalysts xws li MXC-BDMA thiab MXC-TMA yog cov khoom tseem ceeb hauv cov tshuab ua npuas dej rwb thaiv tsev. Lawv pab tswj kev ua haujlwm, txhim kho kev ntws thiab kev sib npaug ntawm cov npuas dej, thiab xyuas kom muaj kev sib txuas thiab ruaj khov.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-11-2024