Mitigating Trace Moisture hauv Ethylene Glycol Diglycidyl Ether (CAS 2224-15-9)

Yuav ua li cas cov kab dej hloov EEW thiab kho kinetics hauv epoxy systems, thiab nruj npaum li cas tsawg dua los yog sib npaug li 0.10% noo noo tswj los ntawm qhov chaw tiv thaiv koj cov qauv.

Nyob rau hauv lub formulation ntawm high-kev ua tau zoo epoxy systems,Ethylene Glycol Diglycidyl Ether (EGDGE, CAS 2224-15-9)yog dav siv raws li ib tug tsawg-viscosity reactive diluent thiab crosslinker. Thaum cov neeg tsim qauv tsom rau nws cov viscosity tsawg (15-30 mPa·s rau qib siab purity) thiab kev ua haujlwm tsis zoo (EEW ​​112–135 g / eq), qhov sib txawv tsis tshua pom pom feem ntau hais txog qhov kawg ntawm lub network:taug dej noo.

EGDGE yog me ntsis dej-soluble. Nyob rau hauv ambient cia lossis tuav tsis raug, nws tuaj yeem nqus dej noo los ntawm huab cua. Qhov no tsis yog qhov teeb meem ntawm lub cev dilution xwb; dej koom nrog hauv chemistry ntawm lub nplhaib epoxide, hloov cov stoichiometry thiab kho kinetics ntawm lub cev.Alfa Tshuaj, ua haujlwm nws cov chaw tsim khoom hauvZhengzhou, Suav, tswj qhov tseem ceeb parameter ntawm lub hauv paus los ntawm kev tswj kom muaj kev txwv ntawm noo nooTsawg dua lossis sib npaug li 0.10%ntawm txhua qhov kev lag luam batch.

1. Hydrolysis Mechanism: Vim Li Cas Cov Dej Tseem Ceeb

Cov pab pawg epoxide hauv EGDGE raug cuam tshuam rau nucleophilic nres los ntawm dej. Tus nqi ntawm no hydrolysis yog heev pH-nyob, ua qeeb tshaj ntawm nruab nrab pH thiab nce ho nyob rau hauv ob qho tib si acidic thiab alkaline tej yam kev mob. Cov ntaub ntawv qhia kev ruaj ntseg qhia tau hais tias ntawm 25 degree, ib nrab-lub neej ntawm EGDGE nyob rau hauv ib puag ncig acidic (pH 4.0) tsuas yog hais txog6 days, thaum nyob nruab nrab pH (7.0) nws txuas mus rau kwv yees li100 days.

Cov tshuaj tiv thaiv no hloov cov pab pawg epoxy reactive rau hauv ib qho uas tsis yog-reactive glycol. Yog li ntawd, lubEpoxy Equivalent Luj (EEW)nce, txhais tau tias koj xav tau ntau dua EGDGE kom ua tiav tib qhov sib txuas sib txuas. Qhov tshwm sim yog qhov cuam tshuam iav hloov pauv kub (Tg), txo cov tshuaj tiv thaiv, thiab kev ua haujlwm tsis muaj zog.

2. Kev cuam tshuam rau cov qauv ntsuas tseem ceeb

Rau cov formulators, qhov tshwm sim ntawm noo noo ingress manifest nyob rau hauv peb qhov chaw tseem ceeb:

3. Cov tswv yim daws teeb meem

Kev tswj cov kab ya raws hauv EGDGE yuav tsum tau ua tib zoo saib ntawm ob qhov kev qhia tshwj xeeb thiab qib ua:

1. Specification Control:Xyuas kom koj tus neeg muag khoom muab cov khoom tshwj xeeb COA nrog cov dej noo txwvTsawg dua lossis sib npaug li 0.10%thiab hydrolyzable chloride txwv ntawmTsawg dua lossis sib npaug li 0.50%. NtawmAlfa Chemical's EGDGE khoom nplooj, cov kev txwv no tau teev meej meej, txhawb nqa los ntawm cov ntaub ntawv tshwj xeeb Karl Fischer titration thiab ion chromatography cov txiaj ntsig.

2. Cia & tuav:Khaws cov thawv ntim kom nruj thaum tsis siv. Nitrogen daim pam yog pom zoo rau bulk cia tso tsheb hlau luam los yog lub nruas loj. Rau kev kuaj kom muaj nuj nqis, siv molecular sieves kom qhuav cov kuab tshuaj yog tias EGDGE yuav tsum tau diluted rau kev tsim.

3. Kev ua:Tsis txhob nthuav tawm EGDGE kom qhib cua rau lub sijhawm ntev thaum lub sijhawm hnyav thiab sib xyaw. Yog tias koj cov txheej txheem suav nrog cov xov xwm aqueous, xav txog kev ua ntej EGDGE nyob rau hauv qhuav, dej-miscible hnyav ua ntej ntxiv los tswj tus nqi hydrolysis.

Yuav Ua Li Cas Alfa Chemical Txhawb EGDGE Daim Ntawv Thov

Alfa Chemical manufactures high-purityEthylene Glycol Diglycidyl Ether (CAS 2224-15-9)ntawm peb qhov chaw nyob hauv Zhengzhou, Suav. Peb nkag siab tias rau reactive diluents,Kev sib raug zoo tseem ceeb npaum li kev ua haujlwm. Peb cov qauv qib tswj cov dej noo tsawg dua lossis sib npaug li 0.10% thiab cov ntsiab lus hydrolyzable chloride tsawg dua lossis sib npaug li 0.50%, ua kom koj cov epoxy formulations ua tiav lub hom phiaj txhua yam thiab hluav taws xob.

Rau pab pawg formulation, tus nqi tsim nyog yog cov ntaub ntawv. Peb muab batch-specific COAs nrog rau kev txheeb xyuas EEW, viscosity, thiab noo noo qhov tseem ceeb. Yog tias koj qhov project xav tau lub qhov rais ntub dej tshwj xeeb lossis kev cai sib xyaw,tiv tauj peb pab neeg technicalnrog koj lub hom phiaj specification.