Hydroxyethyl cellulose (HEC)yog dej-soluble cellulose derivative nrog zoo thickening, film-forming, moisturizing, stabilizing, thiab emulsifying zog. Yog li ntawd, nws yog dav siv nyob rau hauv ntau yam kev lag luam teb, tshwj xeeb tshaj yog nws plays ib tug indispensable thiab tseem ceeb luag hauj lwm nyob rau hauv latex xim (tseem hu ua dej-raws li xim).
1. Cov khoom tseem ceeb ntawm hydroxyethyl cellulose
Hydroxyethyl cellulose yog cov dej-soluble polymer compound tau los ntawm kev hloov kho cellulose molecules (qhia cov pab pawg hydroxyethyl ntawm cellulose molecules). Nws cov yam ntxwv tseem ceeb muaj xws li:
Cov dej solubility: HEC tuaj yeem yaj hauv dej los tsim cov kua nplaum uas muaj kuab heev, yog li txhim kho cov khoom rheological ntawm txheej txheej.
Cov nyhuv Thickening: HEC tuaj yeem ua kom cov viscosity ntawm cov xim muaj zog, ua rau cov xim latex muaj cov txheej txheem zoo.
Adhesion thiab zaj duab xis-forming zog: HEC molecules muaj qee yam hydrophilicity, uas tuaj yeem txhim kho cov txheej txheem ntawm txheej txheej thiab ua kom cov txheej txheej zoo sib xws thiab du.
Kev ruaj ntseg: HEC muaj kev ruaj ntseg zoo thermal thiab tshuaj lom neeg ruaj khov, tuaj yeem nyob ruaj khov thaum lub sijhawm tsim khoom thiab khaws cia ntawm cov txheej txheem, thiab tsis ua rau degradation.
Zoo sagging kuj: HEC muaj siab sagging kuj, uas yuav txo tau cov sagging tshwm sim ntawm cov xim thaum lub sij hawm tsim kho thiab txhim kho kev tsim kho nyhuv.
2. Lub luag haujlwm ntawm hydroxyethyl cellulose hauv cov xim latex
Cov xim latex yog cov xim dej uas siv dej ua cov kuab tshuaj thiab polymer emulsion ua cov yeeb yaj kiab tseem ceeb. Nws yog ib puag ncig tus phooj ywg, tsis muaj tshuaj lom, tsis yog khaus thiab haum rau sab hauv tsev thiab sab nraum zoov phab ntsa painting. Qhov sib ntxiv ntawm hydroxyethyl cellulose tuaj yeem txhim kho qhov ua tau zoo ntawm cov xim latex, uas yog qhov tshwj xeeb hauv cov hauv qab no:
2.1 Thickening nyhuv
Nyob rau hauv latex xim formulations, HEC yog tsuas yog siv raws li ib tug thickener. Vim yog cov dej-soluble yam ntxwv ntawm HEC, nws tuaj yeem yaj sai sai hauv cov kuab tshuaj aqueous thiab tsim cov qauv sib txuas los ntawm kev sib cuam tshuam hauv nruab nrab, ua kom cov viscosity ntawm cov xim latex. Qhov no tuaj yeem tsis tsuas yog txhim kho kev sib kis ntawm cov xim, ua kom nws haum rau txhuam, tab sis kuj tiv thaiv cov xim los ntawm sagging vim tsis tshua muaj viscosity thaum lub sij hawm tha xim.
2.2 Txhim kho kev tsim kho ntawm cov txheej txheem
HECtuaj yeem kho cov khoom rheological ntawm cov xim latex, txhim kho cov sag kuj thiab fluidity ntawm cov xim, xyuas kom meej tias cov xim tuaj yeem sib npaug ntawm qhov chaw ntawm lub substrate, thiab tsis txhob muaj qhov tshwm sim tsis zoo xws li npuas thiab ntws cov cim. Tsis tas li ntawd, HEC tuaj yeem txhim kho qhov ntub dej ntawm cov xim, tso cai rau cov xim latex kom npog sai sai thaum pleev xim, txo qhov tsis xws luag los ntawm cov txheej tsis sib xws.
2.3 Txhim khu kev tuav dej thiab ncua sij hawm qhib
Raws li cov khoom siv polymer nrog lub peev xwm tuav dej muaj zog, HEC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm cov xim latex. Lub sijhawm qhib yog hais txog lub sijhawm uas cov xim tseem nyob hauv lub xeev uas tau pleev xim. Qhov sib ntxiv ntawm HEC tuaj yeem ua kom qeeb ntawm cov dej evaporation, yog li txuas ntxiv lub sijhawm ua haujlwm ntawm cov xim, tso cai rau cov neeg ua haujlwm tsim kho kom muaj sijhawm ntau rau kev txiav thiab txheej. Qhov no yog qhov tseem ceeb rau kev siv cov xim zoo nkauj, tshwj xeeb tshaj yog thaum pleev xim rau thaj chaw loj, tiv thaiv cov xim pleev xim kom qhuav sai sai, ua rau cov txhuam hniav los yog txheej tsis sib xws.
2.4 Txhim kho txheej adhesion thiab dej tsis kam
Nyob rau hauv cov xim latex coatings, HEC tuaj yeem txhim kho qhov adhesion ntawm cov xim thiab qhov chaw ntawm lub substrate kom ntseeg tau tias cov txheej tsis poob yooj yim. Nyob rau tib lub sijhawm, HEC txhim kho cov dej tsis zoo ntawm cov xim latex, tshwj xeeb tshaj yog nyob rau hauv qhov chaw ntub dej, uas tuaj yeem tiv thaiv kom tsis txhob ya raws thiab ua kom ntev lub neej ntawm cov txheej. Tsis tas li ntawd, qhov hydrophilicity thiab adhesion ntawm HEC ua rau cov xim latex los tsim cov txheej txheem zoo ntawm ntau yam substrates.
2.5 Txhim kho kev daws teeb meem thiab kev sib haum xeeb
Txij li cov khoom siv hauv cov xim latex yooj yim los daws, ua rau cov xim tsis sib xws, HEC, ua cov thickener, tuaj yeem txhim kho cov khoom tiv thaiv kev daws teeb meem ntawm cov xim. Los ntawm kev ua kom cov viscosity ntawm cov txheej txheej, HEC ua rau cov khoom tawg yooj yim dua nyob rau hauv txheej, txo cov khoom seem, yog li tswj kev ruaj ntseg ntawm txheej thaum khaws cia thiab siv.
3. Daim ntawv thov zoo ntawm hydroxyethyl cellulose hauv cov xim latex
Qhov sib ntxiv ntawm hydroxyethyl cellulose muaj txiaj ntsig zoo rau kev tsim thiab siv cov xim latex. Ua ntej tshaj plaws, HEC muaj kev tiv thaiv ib puag ncig zoo. Nws cov dej solubility thiab non-toxicity xyuas kom meej tias cov xim latex yuav tsis tso cov khoom tsis zoo thaum siv, ua tau raws li cov kev cai ntawm cov xim niaj hnub no. Qhov thib ob, HEC muaj cov khoom ua yeeb yaj kiab uas muaj zog, uas tuaj yeem txhim kho cov yeeb yaj kiab zoo ntawm cov xim latex, ua rau cov txheej txheem tawv dua thiab smoother, nrog kev ua haujlwm zoo dua thiab muaj kuab paug. Tsis tas li ntawd, HEC tuaj yeem txhim kho qhov fluidity thiab ua haujlwm ntawm cov xim latex, txo qhov nyuaj ntawm kev tsim kho, thiab txhim kho kev ua haujlwm.
Daim ntawv thov ntawmhydroxyethyl celluloseNyob rau hauv cov xim latex muaj ntau yam zoo thiab tuaj yeem txhim kho cov khoom rheological, kev tsim kho, adhesion thiab durability ntawm cov xim. Nrog rau kev txhim kho txuas ntxiv ntawm kev tiv thaiv ib puag ncig thiab cov xim zoo nkauj, HEC, uas yog ib qho tseem ceeb ntawm cov thickener thiab kev ua tau zoo, tau dhau los ua ib qho ntawm cov khoom siv tseem ceeb hauv cov xim latex niaj hnub. Nyob rau hauv lub neej yav tom ntej, nrog rau txoj kev loj hlob ntawm technology, daim ntawv thov ntawm HEC nyob rau hauv latex xim yuav nthuav ntxiv thiab nws lub peev xwm yuav ntau dua.
Post lub sij hawm: Nov-14-2024