Kev tsim npuas thiab tshem tawm txoj kev thaum siv Polyurethane Prepolymer

1. Raw khoom pretreatment

Yuav kom txo cov CO₂npuas nyob rau hauv tus txheej txheem ntawm synthesizing lub prepolymer nplaum, polyester los yog polyether nyob rau hauv lub reactor (los yog reactor) yuav melted thiab nqus dej dehydrated ua ntej, xws li [1, 2] Tetramethylene glycol (PTMG-1000), 1,4-butanediol ( 1,4-BD) thiab dibutyltin dilaurate (DBTDL) system yog rhuab thiab yaj, nplawm thiab rhuab mus rau 90-100 ° C thiab nqus rau 2h, Nws reacts nrog isocyanate tom qab txias mus rau hauv qab 60 ° C. Cov polyisocyanate yog ntxiv ua ntej thaum pub mis, thiab tom qab ntawd cov dej polyester los yog polyether poob rau hauv cov khoom siv tshuaj tiv thaiv, uas tuaj yeem txo qhov tsim ntawm npuas, pab tshem tawm cov tshuaj tiv thaiv tshav kub thiab tswj qhov kub thiab txias. Nco ntsoov tias nyob rau hauv cov synthesis ntawm pob tshab polyurethane prepolymer adhesives, cov dej noo ntawm tag nrho cov ntaub ntawv raw yuav tsum ncav cuag polyurethane theem (< 0,="">

2. Nqus txheej txheem

Nyob rau hauv tus txheej txheem ntawm synthesizing lub prepolymer nplaum, lub nqus tsev vacuum yog saws los ua kom cov roj nyob rau hauv lub npuas khiav, thiaj li mus cuag lub hom phiaj ntawm tshem tawm npuas. Qhov nyuaj ntawm txoj kev no yog nyob rau hauv qhov teeb meem ntawm kev sib khi ntawm cov khoom siv tshuaj tiv thaiv, thiab tag nrho cov tshuaj tiv thaiv tuaj yeem muab tso rau hauv lub tshuab nqus tsev ib puag ncig hauv cov kab ntau lawm.

3. Ntxiv cov txheej txheem ntxiv

The CO₂absorbent los yog adsorbent yog tov rau hauv cov nplaum kom tshem tawm CO2. Cov adsorbents muaj xws li carbon dub, PVC paste resin, calcium oxide, calcium hydroxide, thiab lwm yam. Cov adsorbent yuav tsum tsis txhob muaj dej noo thiab muaj cov khoom zoo, xws li 50-500um calcium oxide micro-dispersion raws li ib tug absorbent.