Xim latex (tseem hu ua xim dej) yog ib hom xim uas muaj dej ua cov kuab tshuaj, uas feem ntau yog siv rau kev kho kom zoo nkauj thiab kev tiv thaiv ntawm phab ntsa, qab nthab thiab lwm qhov chaw. Cov mis ntawm cov xim latex feem ntau muaj cov polymer emulsion, pigment, filler, additives thiab lwm yam khoom xyaw. Ntawm lawv,Hydroxyethyl Cellulose (HEC)yog ib qho tseem ceeb thickener thiab siv dav hauv cov xim latex. HEC tsis yog tsuas yog txhim kho qhov viscosity thiab rheology ntawm cov xim, tab sis kuj txhim kho kev ua tau zoo ntawm cov xim zaj duab xis.
1. Cov yam ntxwv tseem ceeb ntawm HEC
HEC yog ib qho polymer compound uas yaj tau hauv dej uas hloov kho los ntawm cellulose nrog cov khoom zoo thickening, suspension thiab film-forming. Nws cov saw molecular muaj hydroxyethyl pawg, uas ua rau nws yaj hauv dej thiab tsim cov tshuaj viscosity siab. HEC muaj hydrophilicity muaj zog, uas ua rau nws ua lub luag haujlwm hauv kev ruaj khov suspension, kho rheology thiab txhim kho kev ua tau zoo ntawm zaj duab xis hauv cov xim latex.
2. Kev sib cuam tshuam ntawm HEC thiab polymer emulsion
Cov khoom tseem ceeb ntawm cov xim latex yog polymer emulsion (xws li acrylic acid lossis ethylene-vinyl acetate copolymer emulsion), uas tsim cov pob txha tseem ceeb ntawm cov xim pleev xim. Kev sib cuam tshuam ntawm AnxinCel®HEC thiab polymer emulsion feem ntau pom tseeb hauv cov hauv qab no:
Kev ruaj khov zoo dua: HEC, ua ib yam khoom ua kom tuab, tuaj yeem ua rau cov xim pleev xim latex viscosity ntau dua thiab pab ua kom cov khoom emulsion ruaj khov. Tshwj xeeb tshaj yog nyob rau hauv cov polymer emulsions uas muaj cov concentration tsawg, qhov ntxiv ntawm HEC tuaj yeem txo qhov kev tso dej ntawm cov khoom emulsion thiab txhim kho kev ruaj khov ntawm cov xim.
Kev tswj hwm rheological: HEC tuaj yeem kho cov khoom rheological ntawm cov xim latex, kom nws muaj kev ua tau zoo dua thaum lub sijhawm tsim kho. Piv txwv li, thaum lub sijhawm pleev xim, HEC tuaj yeem txhim kho cov khoom txav ntawm cov xim thiab zam kev ntws lossis sagging ntawm cov txheej. Tsis tas li ntawd, HEC kuj tseem tuaj yeem tswj kev rov qab ntawm cov xim thiab txhim kho qhov sib xws ntawm cov xim zaj duab xis.
Kev ua kom zoo dua ntawm kev ua haujlwm ntawm cov xim pleev: Kev ntxiv HEC tuaj yeem txhim kho qhov yooj ywm, ci ntsa iab thiab khawb tsis kam ntawm cov xim pleev. Cov qauv molecular ntawm HEC tuaj yeem cuam tshuam nrog cov polymer emulsion los txhim kho cov qauv ntawm cov xim pleev xim, ua rau nws ntom dua thiab yog li txhim kho nws cov durability.
3. Kev sib cuam tshuam ntawm HEC thiab cov xim
Cov xim hauv cov xim latex feem ntau suav nrog cov xim inorganic (xws li titanium dioxide, mica hmoov, thiab lwm yam) thiab cov xim organic. Kev sib cuam tshuam ntawm HEC thiab cov xim feem ntau yog pom tseeb hauv cov hauv qab no:
Kev tawg xim: Qhov ua kom tuab ntawm HEC ua rau cov xim latex viscosity nce ntxiv, uas tuaj yeem tawg cov xim me me zoo dua thiab tiv thaiv cov xim sib sau ua ke lossis nag lossis daus. Tshwj xeeb tshaj yog rau qee cov xim me me, cov qauv polymer ntawm HEC tuaj yeem qhwv rau ntawm qhov chaw ntawm cov xim kom tiv thaiv kev sib sau ua ke ntawm cov xim me me, yog li txhim kho kev tawg ntawm cov xim thiab kev sib xws ntawm cov xim.
Lub zog khi ntawm cov xim thiab cov txheej txheej:HECCov molecule tuaj yeem tsim cov adsorption lub cev lossis kev ua tshuaj lom neeg nrog rau qhov chaw ntawm cov pigment, txhim kho lub zog khi ntawm cov pigment thiab cov txheej txheej, thiab zam qhov tshwm sim ntawm cov pigment shedding lossis fading ntawm qhov chaw ntawm cov txheej txheej. Tshwj xeeb tshaj yog nyob rau hauv cov xim latex siab, HEC tuaj yeem txhim kho qhov kev tiv thaiv huab cua thiab UV tiv thaiv ntawm cov pigment thiab ntev lub neej kev pabcuam ntawm cov txheej.
4. Kev sib cuam tshuam ntawm HEC thiab cov khoom sau
Qee cov khoom sau (xws li calcium carbonate, talcum hmoov, silicate minerals, thiab lwm yam) feem ntau yog ntxiv rau cov xim latex kom txhim kho qhov rheology ntawm cov xim, txhim kho lub zog zais ntawm cov zaj duab xis txheej thiab ua kom cov nqi-zoo ntawm cov xim. Kev sib cuam tshuam ntawm HEC thiab cov khoom sau tau pom tseeb hauv cov hauv qab no:
Kev ncua ntawm cov khoom sau: HEC tuaj yeem ua kom cov khoom sau ntxiv rau cov xim latex nyob rau hauv ib qho kev sib xyaw ua ke los ntawm nws cov nyhuv thickening, tiv thaiv cov khoom sau los ntawm kev poob. Rau cov khoom sau nrog cov khoom loj dua, qhov thickening nyhuv ntawm HEC yog qhov tseem ceeb, uas tuaj yeem ua kom zoo tswj tau qhov ruaj khov ntawm cov xim.
Qhov ci thiab kov ntawm lub txheej: Kev ntxiv cov khoom sau feem ntau cuam tshuam rau qhov ci thiab kov ntawm lub txheej. AnxinCel®HEC tuaj yeem txhim kho qhov ua tau zoo ntawm lub txheej los ntawm kev kho qhov kev faib tawm thiab kev teeb tsa ntawm cov khoom sau. Piv txwv li, qhov sib npaug ntawm cov khoom sau pab txo qhov roughness ntawm qhov chaw txheej thiab txhim kho qhov tiaj tus thiab gloss ntawm cov xim zaj duab xis.
5. Kev sib cuam tshuam ntawm HEC thiab lwm yam khoom siv ntxiv
Cov mis xim latex kuj muaj qee cov khoom ntxiv, xws li cov tshuaj defoamers, preservatives, wetting agents, thiab lwm yam. Cov additives no yuav cuam tshuam nrog HEC thaum txhim kho kev ua tau zoo ntawm cov xim:
Kev sib cuam tshuam ntawm cov tshuaj defoamers thiab HEC: Lub luag haujlwm ntawm cov tshuaj defoamers yog kom txo cov npuas lossis ua npuas dej hauv cov xim, thiab cov yam ntxwv viscosity siab ntawm HEC yuav cuam tshuam rau cov nyhuv ntawm cov tshuaj defoamers. HEC ntau dhau yuav ua rau nws nyuaj rau cov tshuaj defoamer kom tshem tawm cov npuas dej tag nrho, yog li cuam tshuam rau qhov zoo ntawm cov xim. Yog li ntawd, qhov ntau ntawm HEC ntxiv yuav tsum tau sib koom ua ke nrog qhov ntau ntawm cov tshuaj defoamer kom ua tiav qhov zoo tshaj plaws.
Kev sib cuam tshuam ntawm cov tshuaj preservatives thiab HEC: Lub luag haujlwm ntawm cov tshuaj preservatives yog los tiv thaiv kev loj hlob ntawm cov kab mob me me hauv cov xim thiab ntev lub sijhawm khaws cia ntawm cov xim. Raws li cov polymer ntuj, HEC cov qauv molecular yuav cuam tshuam nrog qee cov tshuaj preservatives, cuam tshuam rau nws cov nyhuv tiv thaiv xeb. Yog li ntawd, nws yog qhov tseem ceeb heev uas yuav tsum xaiv cov tshuaj preservative uas sib xws nrog HEC.
Lub luag haujlwm ntawmHECHauv cov xim latex tsis yog tsuas yog ua kom tuab xwb, tab sis nws txoj kev sib cuam tshuam nrog cov polymer emulsions, pigments, fillers thiab lwm yam additives ua ke txiav txim siab qhov ua tau zoo ntawm cov xim latex. AnxinCel®HEC tuaj yeem txhim kho cov khoom rheological ntawm cov xim latex, txhim kho qhov dispersibility ntawm cov pigments thiab fillers, thiab txhim kho cov khoom siv kho tshuab thiab durability ntawm lub txheej. Tsis tas li ntawd, qhov cuam tshuam synergistic ntawm HEC thiab lwm yam additives kuj muaj qhov cuam tshuam tseem ceeb rau kev ruaj khov cia, kev ua haujlwm ntawm kev tsim kho thiab cov tsos ntawm cov xim latex. Yog li ntawd, hauv kev tsim cov mis xim latex, kev xaiv tsim nyog ntawm HEC hom thiab ntxiv tus nqi thiab qhov sib npaug ntawm nws txoj kev sib cuam tshuam nrog lwm cov khoom xyaw yog qhov tseem ceeb rau kev txhim kho tag nrho cov kev ua tau zoo ntawm cov xim latex.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-28-2024