Hydroxyethyl cellulose yog ib qho nruab nrab mus rau qib siab viscosity ntawm cellulose ether, siv los ua cov thickener thiab stabilizer rau cov txheej txheem dej, tshwj xeeb tshaj yog thaum cov viscosity cia siab thiab daim ntawv thov viscosity tsawg. Cellulose ether yog ib qho yooj yim rau disperse nyob rau hauv dej txias nrog pH nqi ≤ 7, tab sis nws yog ib qho yooj yim rau agglomerate nyob rau hauv alkaline kua nrog pH tus nqi ≥ 7.5, yog li peb yuav tsum xyuam xim rau dispersibility ntawm cellulose ether.
Nta thiab kev siv ntawm hydroxyethyl cellulose:
1. Anti-enzyme non-ionic dej thickener, uas tuaj yeem siv rau ntau yam ntawm pH tus nqi (PH = 2-12).
2. Yooj yim rau disperse, nws tuaj yeem ntxiv ncaj qha rau hauv daim ntawv ntawm cov hmoov qhuav los yog hauv daim ntawv ntawm slurry thaum sib tsoo pigments thiab fillers.
3. Kev tsim kho zoo heev. Nws muaj qhov zoo ntawm kev ua haujlwm txuag, tsis yooj yim rau drip thiab dai, thiab zoo splash kuj.
4. Zoo compatibility nrog ntau yam surfactants thiab preservatives siv nyob rau hauv latex xim.
5. Lub cia viscosity yog ruaj khov, uas tuaj yeem tiv thaiv cov viscosity ntawm cov xim latex los ntawm kev txo qis vim qhov decomposition ntawm enzymes nyob rau hauv dav hydroxyethyl cellulose.
Cov khoom ntawm Hydroxyethyl Cellulose
Hydroxyethyl cellulose ether yog non-ionic dej-soluble polymer. Nws yog cov hmoov dawb los yog lub teeb daj uas ntws yooj yim. Feem ntau insoluble nyob rau hauv feem ntau cov organic solvents
1. HEC yog soluble nyob rau hauv dej kub los yog dej txias, thiab tsis precipitate ntawm kub los yog boiling, uas ua rau nws muaj ib tug ntau yam ntawm solubility thiab viscosity yam ntxwv, thiab non-thermal gelation.
2. Nws yog non-ionic thiab tuaj yeem ua ke nrog lwm cov dej-soluble polymers, surfactants, thiab ntsev. Nws yog ib qho zoo heev colloidal thickener rau cov kev daws teeb meem uas muaj high-concentration electrolytes.
3. Lub peev xwm tuav dej yog ob zaug siab dua li ntawm methyl cellulose, thiab nws muaj kev tswj xyuas zoo dua.
4. Piv nrog rau kev lees paub methyl cellulose thiab hydroxypropyl methyl cellulose, lub peev xwm dispersing ntawm HEC yog qhov phem tshaj, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj plaws (xim xim).
Thickening
cuam tshuam rau kev ua haujlwm, xws li: coatability, txaws tsis kam, poob tsis kam; cov qauv network tshwj xeeb ntawm cellulose ether tuaj yeem ruaj khov cov hmoov hauv txheej txheej txheej, ua kom nws txoj kev sib haum xeeb, thiab ua kom lub cev tau txais txiaj ntsig zoo dua.
Kev tiv thaiv dej zoo
Tom qab cov xim zaj duab xis yog qhuav tag, nws muaj dej zoo heev. Qhov no tshwj xeeb tshaj yog qhia txog tus nqi ntawm nws cov dej tsis kam nyob rau hauv high-PVC formulation system. Los ntawm txawv teb chaws mus rau Suav formulations, nyob rau hauv no high-PVC system, tus nqi ntawm cellulose ether ntxiv yog yeej 4-6‰.
kev tuav dej zoo heev
Hydroxyethyl cellulose tuaj yeem ncua lub sijhawm raug thiab tswj lub sijhawm kom qhuav kom tau txais kev tsim cov yeeb yaj kiab zoo dua; ntawm lawv, cov dej tuav ntawm methyl cellulose thiab hypromellose poob siab tshaj 40 ° C, thiab qee qhov kev tshawb fawb txawv teb chaws ntseeg tias nws tuaj yeem txo qis los ntawm 50%, qhov tshwm sim ntawm cov teeb meem nyob rau lub caij ntuj sov thiab kub siab yog nce ntau.
Zoo stability kom txo tau flocculation ntawm cov xim
Tshem tawm sedimentation, syneresis thiab flocculation; lub caij no, hydroxyethyl cellulose ether yog ib yam khoom uas tsis yog-ionic. Tsis hnov mob nrog ntau yam additives nyob rau hauv lub system.
Zoo compatibility nrog ntau xim system
Zoo heev compatibility ntawm colorants, pigments thiab fillers; hydroxyethyl cellulose ether muaj cov xim zoo tshaj plaws, tab sis tom qab kev hloov kho, xws li methyl thiab ethyl, yuav muaj qhov tsis zoo ntawm cov xim sib xws.
Zoo compatibility nrog ntau yam raw khoom
Nws tuaj yeem siv rau hauv ntau txheej txheej txheej txheej.
Kev ua haujlwm siab antimicrobial
Haum rau silicate systems
Post lub sij hawm: Feb-02-2023