Cim:Hydroxyethyl Cellulose (HEC CAS: 9004-62-0) yog cov hmoov dawb los yog daj daj, tsis muaj ntxhiab, thiab yooj yim ntws hmoov.Soluble nyob rau hauv ob qho tib si dej txias thiab dej kub, tab sis feem ntau insoluble nyob rau hauv feem ntau cov organic solvents.Tus nqi pH hloov me ntsis hauv thaj tsam ntawm 2-12, tab sis cov viscosity txo qis tshaj qhov no.
Tus nqi:Hydroxyethyl Cellulose (HEC CAS: 9004-62-0) yog ib qho kev siv cov thickener rau cellulose ether raws li cov organic dej inks.Nws yog cov dej-soluble nonionic compound uas muaj peev xwm thickening zoo rau dej, tuaj yeem degraded los ntawm oxygen, acids, thiab enzymes, thiab tuaj yeem sib txuas los ntawm Cu2 + nyob rau hauv alkaline tej yam kev mob.Nws yog thermally ruaj khov, tsis tshwm gel thaum lub sij hawm cua sov, tsis precipitate nyob rau hauv acidic tej yam kev mob, thiab muaj zoo film-forming khoom.Nws cov tshuaj aqueous tuaj yeem ua rau hauv cov yeeb yaj kiab pob tshab, uas tuaj yeem tsim los ntawm kev ua ntawm alkaline cellulose thiab Chemicalbook ethylene oxide, thiab muaj cov khoom ntawm thickening, emulsification, adhesion, ncua kev kawm ntawv, zaj duab xis-tsim, noo noo tuav, thiab kev tiv thaiv colloid.Lub luag hauj lwm ntawm thickeners nyob rau hauv dej-raws li inks yog kom thicken lawv.Ntxiv cov thickeners rau tus number case nce nws cov viscosity, uas tuaj yeem txhim kho lub cev thiab tshuaj lom neeg ruaj khov ntawm tus number case;Vim qhov nce hauv viscosity, rheology ntawm tus number case tuaj yeem tswj tau thaum luam ntawv;Cov pigment thiab muab tub lim rau hauv tus cwj mem tsis yooj yim rau precipitate, ua rau kom ruaj khov ntawm cov dej raws li tus number case.
Txoj kev tsim khoom： Alkali cellulose yog lub ntuj polymer uas muaj peb pawg hydroxyl ntawm txhua lub nplhaib fiber ntau.Cov pab pawg ua haujlwm hydroxyl feem ntau ua rau tsim cov hydroxyethyl cellulose.Soak cov paj rwb nyoos los yog cov tawv nqaij ua kom zoo rau hauv 30% kua alkali, thiab muab nws tawm rau nias tom qab ib nrab teev.Nias kom txog thaum cov dej alkaline nce mus txog 1: 2.8, thiab tom qab ntawd tsoo nws.Cov crushed alkali cellulose yog muab tso rau hauv lub reactor, kaw, nqus, thiab ntim nrog nitrogen.Chemicalbook pheej rov nqus thiab ntim nrog nitrogen los hloov tag nrho cov huab cua hauv reactor.Nias hauv precooled ethylene oxide kua, hla dej txias rau hauv lub tsho reactor, thiab tswj cov tshuaj tiv thaiv kub txog li 25 ℃ rau 2h kom tau cov khoom crude hydroxyethyl cellulose.Cov khoom nyoos yog ntxuav nrog cawv, nruab nrab nrog acetic acid rau pH 4-6, thiab sib txuas nrog glyoxal rau kev laus.Tom qab ntawd ntxuav nrog dej, centrifuge, dehydrate, qhuav, thiab grind kom tau hydroxyethyl cellulose.
Post lub sij hawm: Mar-28-2023
