Cov khoom siv rwb thaiv tsev uas siv tshuaj tsuag ua npuas ncauj yog ib yam khoom siv rwb thaiv tsev uas siv tau ntau yam thiab ua tau zoo heev uas ua los ntawm kev sib xyaw ua ke ntawm ob yam khoom tseem ceeb (polyol resin thiab isocyanate). Thaum sib xyaw ua ke, ob yam khoom no sib xyaw ua ke los ua ib lub ua npuas ncauj polyurethane uas kaw thiab rwb thaiv tsev tau zoo. Qhov kev thov kom muaj cov khoom siv rwb thaiv tsev zoo rau kev siv hauv tsev, kev lag luam thiab kev lag luam tau ua rau muaj kev siv cov khoom siv rwb thaiv tsev uas siv tshuaj tsuag ua npuas ncauj uas muaj kev rwb thaiv tsev zoo, tiv taus dej noo thiab txhawb nqa cov qauv.
Yuav Ua Li Cas Thiaj Ua Tau Cov Tshuaj Tsuag Ua Npuas Ncauj
Kev tsim cov khoom siv rwb thaiv tsev uas txau ua npuas ncauj vam khom rau kev sib cuam tshuam ntawm polyols thiab isocyanates, uas nthuav dav kom puv qhov chaw thiab tawv ua npuas ncauj rwb thaiv tsev tom qab txau. Txawm li cas los xij, cov txheej txheem no xav tau kev tswj hwm kom meej kom ntseeg tau tias qhov ntom ntom ntawm cov npuas ncauj, cov qauv thiab kev sib xws. Ntawm no,polyurethane catalystua lub luag haujlwm tseem ceeb hauv kev tsav tsheb thiab tswj kev teb.
Lub Luag Haujlwm ntawm Catalysts hauv Polyurethane Foam Production
Cov tshuaj catalysts tseem ceeb heev rau kev tsim cov polyurethanes vim lawv ua rau kom muaj kev sib xyaw ua ke ntau dua thiab tswj lub sijhawm gel, uas yog qhov tseem ceeb rau kev ua kom cov npuas dej nthuav dav zoo tshaj plaws. Cov tshuaj catalyst kuj tseem tuaj yeem tswj cov tshuaj tiv thaiv thib ob, xws li cov tshuaj tiv thaiv dej, uas tso cov roj uas xav tau los pib lub npuas. Qhov sib npaug ntawm cov tshuaj tiv thaiv no yog qhov tseem ceeb rau kev tsim cov qauv ua npuas dej sib xws nrog cov qauv cellular thiab cov khoom sib xws. Hauv kev tsim cov polyurethane, cov tshuaj catalysts feem ntau muab faib ua ob pawg:cov tshuaj amine catalyststhiabcov tshuaj catalysts organometallic(xws li organotin, bismuth, thiab zinc).
MXC-TMA thiab MXC-BDMA: Cov Catalysts rau Kev Rwb Thaiv Ua Npuas Ncauj Tsuag
Cov tshuaj catalystsMXC-TMAthiabMXC-BDMAmuaj qhov zoo pom tseeb hauv kev tsim cov tshuaj tsuag ua npuas ncauj rwb thaiv tsev.MXC-TMAyog ib qho kua tsis muaj xim rau daj daj uas txhawb nqa trimerization ntawm polyisocyanurate los tsim ib qho nkhaus nce siab sib npaug thiab tswj tau. Cov catalyst no siv dav hauv cov ua npuas ncauj uas xav tau kev ua kom zoo dua qub thiab kev kho kom zoo, thiab yog ib qho kev xaiv zoo rau cov ntawv thov rwb thaiv tsev uas xav tau kev ruaj khov ntawm cov qauv.
Nyob rau sab tes tod,MXC-BDMA(N, N-dimethylbenzylamine, CAS tus lej 103-83-3) yog ib qho tshuaj benzyldimethylamine uas feem ntau siv rau hauv cov ntawv thov ua npuas ncauj tawv. Nws ua rau cov npuas ncauj ua haujlwm sai dua, tsim cov qhov npuas sib npaug thiab ua kom muaj kev sib txuas zoo rau cov khoom siv. Qhov no ua rau MXC-BDMA haum rau cov kev xav tau kev rwb thaiv tsev zoo hauv cov ntawv thov txau ua npuas ncauj, qhov twg cov qauv ua npuas ncauj ruaj khov, ruaj khov thiab nplaum yog qhov tseem ceeb.
Xaus lus
Cov tshuaj polyurethane catalysts xws li MXC-TMA thiab MXC-BDMA yog qhov tseem ceeb rau kev ua tiav qhov zoo ntawm cov khoom siv rwb thaiv tsev ua npuas dej. Lawv cov yam ntxwv tshwj xeeb tso cai rau kev tswj hwm qhov ua npuas dej kom raug, ua kom ntseeg tau tias kev ua haujlwm rwb thaiv tsev txhim khu kev qha hauv ntau yam kev siv. Raws li qhov kev thov rau cov kev daws teeb meem rwb thaiv tsev txuag hluav taws xob txuas ntxiv loj hlob, cov tshuaj polyurethane catalysts siab heev txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev muab cov rwb thaiv tsev ua npuas dej zoo, ruaj khov.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-06-2024