Cov xim pleev xim rau xim (tseem hu ua xim xim dej) yog ib hom xim xim nrog dej ua kuab tshuaj, uas yog siv los kho kom zoo nkauj thiab tiv thaiv phab ntsa, qab nthab thiab lwm qhov chaw. Cov mis ntawm latex xim feem ntau muaj polymer emulsion, pigment, muab tub lim, additives thiab lwm yam khoom xyaw. Ntawm lawv,Hydroxyethyl Cellulose (HEC)yog ib qho tseem ceeb thickener thiab yog dav siv nyob rau hauv latex xim. HEC tuaj yeem tsis tsuas yog txhim kho cov viscosity thiab rheology ntawm cov xim, tab sis kuj txhim kho kev ua haujlwm ntawm cov xim pleev xim.
1. Cov yam ntxwv tseem ceeb ntawm HEC
HEC yog cov dej-soluble polymer compound hloov los ntawm cellulose nrog zoo thickening, ncua kev kawm ntawv thiab zaj duab xis-forming zog. Nws cov saw molecular muaj cov pab pawg hydroxyethyl, uas ua rau nws yaj hauv dej thiab tsim cov tshuaj viscosity siab. HEC muaj zog hydrophilicity, uas ua rau nws ua lub luag haujlwm hauv kev ruaj ntseg ncua kev kawm ntawv, kho rheology thiab txhim kho kev ua yeeb yaj kiab hauv cov xim latex.
2. Kev sib cuam tshuam ntawm HEC thiab polymer emulsion
Cov ntsiab lus tseem ceeb ntawm cov xim latex yog polymer emulsion (xws li acrylic acid los yog ethylene-vinyl acetate copolymer emulsion), uas tsim cov pob txha loj ntawm cov xim zaj duab xis. Kev sib cuam tshuam ntawm AnxinCel®HEC thiab polymer emulsion feem ntau tshwm sim hauv cov hauv qab no:
Txhim khu kev ruaj ntseg: HEC, raws li ib tug thickener, yuav ua rau kom cov viscosity ntawm latex xim thiab pab stabilize cov emulsion hais. Tshwj xeeb tshaj yog nyob rau hauv qis-concentration polymer emulsions, qhov sib ntxiv ntawm HEC tuaj yeem txo cov sedimentation ntawm emulsion hais thiab txhim kho cov khoom ruaj khov ntawm cov xim.
Rheological regulation: HEC tuaj yeem kho cov khoom rheological ntawm latex xim, kom nws muaj cov txheej txheem zoo dua thaum tsim kho. Piv txwv li, thaum lub sij hawm painting txheej txheem, HEC tuaj yeem txhim kho cov khoom zawv zawg ntawm cov xim thiab tsis txhob poob los yog sagging ntawm txheej. Tsis tas li ntawd, HEC kuj tseem tuaj yeem tswj xyuas qhov rov qab ntawm cov xim thiab txhim kho qhov sib xws ntawm cov xim zaj duab xis.
Kev ua kom zoo ntawm txheej txheej: Qhov sib ntxiv ntawm HEC tuaj yeem txhim kho qhov yooj yim, glossiness thiab khawb tsis kam ntawm txheej. Cov qauv molecular ntawm HEC tuaj yeem cuam tshuam nrog cov polymer emulsion los txhim kho tag nrho cov qauv ntawm cov xim zaj duab xis, ua rau nws denser thiab yog li txhim kho nws cov kav ntev.
3. Kev sib cuam tshuam ntawm HEC thiab pigments
Pigments nyob rau hauv cov xim latex feem ntau muaj xws li inorganic pigments (xws li titanium dioxide, mica hmoov, thiab lwm yam) thiab organic pigments. Kev sib cuam tshuam ntawm HEC thiab pigments feem ntau yog tshwm sim hauv cov hauv qab no:
Pigment dispersion: Lub thickening nyhuv ntawm HEC tsub kom lub viscosity ntawm latex xim, uas yuav zoo disperse pigment hais thiab tsis txhob pigment aggregation los yog nag lossis daus. Tshwj xeeb tshaj yog rau qee cov xim xim zoo nkauj, cov qauv polymer ntawm HEC tuaj yeem qhwv rau saum npoo ntawm cov xim kom tiv thaiv kev sib sau ntawm cov xim xim, yog li txhim kho cov dispersion ntawm cov xim thiab cov xim sib xws.
Kev khi quab yuam ntawm cov xim thiab txheej zaj duab xis:HECmolecules tuaj yeem tsim lub cev adsorption lossis tshuaj lom neeg ua haujlwm nrog rau saum npoo ntawm cov xim, txhim khu kev sib txuas ntawm cov xim thiab cov xim txheej, thiab zam qhov tshwm sim ntawm cov xim xim los yog fading ntawm cov xim txheej. Tshwj xeeb tshaj yog nyob rau hauv high-kev ua tau zoo latex xim, HEC tuaj yeem txhim kho huab cua tiv thaiv thiab UV tiv thaiv ntawm cov xim thiab txuas ntxiv lub neej kev pab cuam ntawm txheej.
4. Kev sib cuam tshuam ntawm HEC thiab cov muab tub lim
Qee qhov muab tso rau (xws li calcium carbonate, talcum hmoov, silicate minerals, thiab lwm yam) feem ntau yog ntxiv rau cov xim latex los txhim kho cov rheology ntawm cov xim, txhim kho lub zog zais ntawm cov txheej txheej zaj duab xis thiab ua kom cov nqi ntawm cov xim. Kev sib cuam tshuam ntawm HEC thiab cov khoom ntim tau pom hauv cov hauv qab no:
Kev ncua ntawm cov fillers: HEC tuaj yeem khaws cov fillers ntxiv rau cov xim pleev xim rau hauv lub xeev tsis sib xws los ntawm nws cov nyhuv thickening, tiv thaiv cov fillers los ntawm kev daws teeb meem. Rau cov khoom ntim nrog qhov loj me me, cov nyhuv thickening ntawm HEC yog qhov tseem ceeb tshwj xeeb, uas tuaj yeem tswj tau qhov ruaj khov ntawm cov xim.
Gloss thiab kov ntawm cov txheej: Qhov sib ntxiv ntawm cov fillers feem ntau cuam tshuam rau gloss thiab kov ntawm txheej. AnxinCel®HEC tuaj yeem txhim kho qhov ua tau zoo ntawm cov txheej txheem los ntawm kev kho cov kev faib tawm thiab kev npaj cov khoom ntim. Piv txwv li, qhov sib txawv ntawm qhov sib txawv ntawm cov khoom muab tub lim yuav pab txo qhov roughness ntawm txheej txheej thiab txhim kho cov flatness thiab gloss ntawm cov xim zaj duab xis.
5. Kev sib cuam tshuam ntawm HEC thiab lwm yam khoom ntxiv
Cov tshuaj pleev xim latex kuj suav nrog lwm cov tshuaj ntxiv, xws li defoamers, preservatives, wetting agents, thiab lwm yam. Cov tshuaj ntxiv no tuaj yeem cuam tshuam nrog HEC thaum txhim kho cov xim zoo nkauj:
Kev sib cuam tshuam ntawm defoamers thiab HEC: Lub luag haujlwm ntawm defoamers yog txo cov npuas lossis npuas hauv cov xim, thiab cov yam ntxwv siab viscosity ntawm HEC tuaj yeem cuam tshuam cov nyhuv ntawm defoamers. HEC ntau dhau yuav ua rau nws nyuaj rau lub defoamer kom tshem tawm cov npuas dej kom tiav, yog li cuam tshuam rau qhov zoo ntawm cov xim. Yog li ntawd, tus nqi ntawm HEC ntxiv yuav tsum tau koom tes nrog tus nqi ntawm defoamer kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Kev sib cuam tshuam ntawm preservatives thiab HEC: Lub luag hauj lwm ntawm preservatives yog los tiv thaiv kev loj hlob ntawm microorganisms nyob rau hauv cov xim thiab ncua sij hawm cia ntawm cov xim. Raws li cov khoom siv ntuj tsim, HEC cov qauv molecular yuav cuam tshuam nrog qee cov tshuaj tiv thaiv, cuam tshuam rau nws cov nyhuv tiv thaiv corrosion. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau xaiv ib qho kev khaws cia uas haum rau HEC.
Lub luag haujlwm ntawmHECNyob rau hauv cov xim latex tsis yog tsuas yog thickening, tab sis nws cuam tshuam nrog polymer emulsions, pigments, fillers thiab lwm yam additives ua ke txiav txim siab kev ua tau zoo ntawm latex xim. AnxinCel®HEC tuaj yeem txhim kho cov khoom rheological ntawm cov xim latex, txhim kho cov dispersibility ntawm pigments thiab fillers, thiab txhim kho cov khoom siv thiab ua haujlwm ntev ntawm cov txheej. Tsis tas li ntawd, cov nyhuv synergistic ntawm HEC thiab lwm yam additives kuj tseem muaj kev cuam tshuam tseem ceeb ntawm kev cia ruaj khov, kev tsim kho kev ua haujlwm thiab txheej txheej ntawm cov xim latex. Yog li ntawd, nyob rau hauv kev tsim qauv ntawm cov xim latex, kev xaiv tsim nyog ntawm HEC hom thiab cov nyiaj ntxiv thiab qhov sib npaug ntawm nws cov kev cuam tshuam nrog lwm cov khoom xyaw yog tus yuam sij rau kev txhim kho tag nrho cov kev ua tau zoo ntawm cov xim latex.
Post lub sij hawm: Dec-28-2024