Xim qib HEC

Qib pleev ximHEC Hydroxyethyl cellulose yog ib hom polymer uas tsis yog ionic uas yaj tau hauv dej, dawb los yog daj, yooj yim ntws, tsis muaj ntxhiab thiab tsis qab, tuaj yeem yaj rau hauv dej txias thiab dej kub, thiab qhov nrawm ntawm kev yaj nce nrog qhov kub thiab txias, feem ntau tsis yaj hauv feem ntau cov organic solvents. Nws muaj PH stability zoo thiab me ntsis viscosity hloov pauv hauv qhov ntau ntawm ph2-12. HEC muaj kev tiv thaiv ntsev siab thiab hygroscopic muaj peev xwm, thiab muaj zog hydrophilic dej khaws cia. Nws cov kua dej muaj kev ua haujlwm ntawm qhov chaw thiab cov khoom viscosity siab muaj pseudoplasticity siab. Yuav ua rau hauv zaj duab xis pob tshab anhydrous nrog lub zog nruab nrab, tsis yooj yim paug los ntawm roj, tsis cuam tshuam los ntawm lub teeb, tseem muaj HEC dej-soluble zaj duab xis. Tom qab kev kho qhov chaw, HEC disperses thiab tsis sib sau ua ke hauv dej, tab sis yaj qeeb qeeb. PH tuaj yeem hloov kho rau 8-10 thiab yaj sai sai.

Cov khoom tseem ceeb

Hydroxyethyl cellulose(HEC)yog tias nws tuaj yeem yaj rau hauv dej txias thiab dej kub, thiab tsis muaj cov yam ntxwv gel. Nws muaj ntau yam kev hloov pauv, solubility thiab viscosity. Nws muaj kev ruaj khov thermal zoo (qis dua 140 ° C) thiab tsis tsim nyob rau hauv cov xwm txheej acidic. nag lossis daus. Cov kua hydroxyethyl cellulose (HEC) tuaj yeem tsim cov zaj duab xis pob tshab, uas muaj cov yam ntxwv tsis-ionic uas tsis cuam tshuam nrog ions thiab muaj kev sib raug zoo.

Ua ib qho colloid tiv thaiv, Xim qib HEC siv tau rau vinyl acetate emulsion polymerization los txhim kho qhov ruaj khov ntawm lub polymerization system hauv ntau yam PH. Hauv kev tsim cov khoom tiav los ua cov xim, cov khoom sau thiab lwm yam khoom ntxiv sib npaug, ruaj khov thiab muab cov nyhuv thickening. Nws kuj tseem siv tau rau styrene, acrylic, acrylic thiab lwm yam polymers suspended ua dispersants, siv rau hauv cov xim latex tuaj yeem txhim kho qhov thickening, txhim kho kev ua tau zoo.

Cov Khoom Siv Tshuaj

Cov khoom Cov Qib 

Txoj kev siv hydroxyethyl cellulose HEC hauv dejpleev xim

1. Ntxiv ncaj qha thaum sib tsoo cov xim: txoj kev no yog qhov yooj yim tshaj plaws, thiab lub sijhawm siv luv luv. Cov kauj ruam ntxaws ntxaws yog raws li nram no:

(1) Ntxiv cov dej huv kom tsim nyog rau hauv VAT ntawm lub tshuab ua kom siab (feem ntau, ethylene glycol, tus neeg sawv cev ntub dej thiab tus neeg sawv cev tsim zaj duab xis raug ntxiv rau lub sijhawm no)

(2) Pib do ntawm qhov ceev qis thiab maj mam ntxiv hydroxyethyl cellulose

(3) Txuas ntxiv do kom txog thaum tag nrho cov khoom me me raug ntub dej

(4) ntxiv cov tshuaj tiv thaiv pwm, PH regulator, thiab lwm yam

(5) Do kom txog thaum tag nrho cov hydroxyethyl cellulose yaj tag (qhov viscosity ntawm cov tshuaj tau nce ntxiv ntau) ua ntej ntxiv lwm yam khoom hauv cov mis, thiab zom kom txog thaum nws ua xim.

2. nruab nrog niam kua tos: txoj kev no yog thawj zaug nruab nrog cov kua niam ntau dua, thiab tom qab ntawd ntxiv cov xim latex, qhov zoo ntawm txoj kev no yog qhov yooj ywm dua, tuaj yeem ntxiv ncaj qha rau cov khoom tiav xim, tab sis yuav tsum khaws cia kom zoo. Cov kauj ruam thiab cov txheej txheem zoo ib yam li cov kauj ruam (1) - (4) hauv Txoj Kev 1, tsuas yog tias tsis tas yuav tsum muaj lub tshuab ua kom siab thiab tsuas yog qee lub tshuab ua kom muaj zog txaus kom cov hydroxyethyl fibers sib npaug hauv cov tshuaj txaus. Txuas ntxiv do kom txog thaum nws yaj tag rau hauv cov tshuaj tuab. Nco ntsoov tias cov tshuaj tiv thaiv pwm yuav tsum tau ntxiv rau niam cawv sai li sai tau.

3. Kev ua haujlwm zoo li porridge: Vim tias cov organic solvents yog cov tshuaj tsis zoo rau hydroxyethyl cellulose, cov organic solvents no tuaj yeem nruab nrog porridge. Cov organic solvents feem ntau siv xws li ethylene glycol, propylene glycol, thiab cov neeg sawv cev tsim zaj duab xis (xws li hexadecanol lossis diethylene glycol butyl acetate), dej khov kuj yog cov tshuaj tsis zoo, yog li dej khov feem ntau siv nrog cov kua organic hauv porridge. Gruel - zoo li hydroxyethyl cellulose tuaj yeem ntxiv ncaj qha rau cov xim. Hydroxyethyl cellulose tau saturated hauv daim ntawv porridge. Tom qab ntxiv lacquer, yaj tam sim ntawd thiab muaj cov nyhuv thickening. Tom qab ntxiv, txuas ntxiv do kom txog thaum hydroxyethyl cellulose yaj tag thiab sib xws. Ib qho porridge ib txwm yog ua los ntawm kev sib tov rau feem ntawm cov organic solvent lossis dej khov nrog ib feem ntawm hydroxyethyl cellulose. Tom qab li 5-30 feeb, qib ximHEChydrolysis thiab pom tseeb tias nce siab. Thaum lub caij ntuj sov, cov av noo ntawm dej siab dhau los siv rau porridge.

4. Tej yam uas yuav tsum tau saib xyuas thaum muab cov hydroxyethyl cellulose niam cawv:

Pkev ceeb toom

1 Ua ntej thiab tom qab ntxiv xim pleev ximHEC, yuav tsum tau do tas li kom txog thaum cov tshuaj no pob tshab thiab meej.

2. Maj mam lim cov hydroxyethyl cellulose rau hauv lub tank sib tov. Tsis txhob ntxiv rau hauv lub tank sib tov ntau ntau lossis ncaj qha rau hauv cov xim pleev xim loj lossis kheej kheej.HEC.

3 qhov kub ntawm dej thiab pH ntawm dej muaj kev sib raug zoo rau kev yaj ntawm Xim qibHEChydroxyethyl cellulose, yog li yuav tsum tau saib xyuas tshwj xeeb rau nws.

Tsis txhob ntxiv qee yam khoom tseem ceeb rau hauv qhov sib tov ua ntej qib ximHECCov hmoov hydroxyethyl cellulose raug muab tso rau hauv dej. Kev tsa pH tom qab muab tso rau hauv dej yuav pab yaj.

5 .Raws li qhov ua tau, ntxiv cov tshuaj mildew inhibitor thaum ntxov.

6 Thaum siv cov xim pleev xim uas muaj viscosity siabHEC, qhov concentration ntawm niam cawv yuav tsum tsis txhob siab tshaj 2.5-3% (los ntawm qhov hnyav), txwv tsis pub niam cawv nyuaj rau kev ua haujlwm.

Cov yam tseem ceeb uas cuam tshuam rau qhov viscosity ntawm cov xim latex

1. Cov pa npuas ntau ntxiv hauv cov xim, qhov siab dua qhov viscosity.

2. Tus nqi ntawm cov tshuaj ua kom muaj zog thiab dej hauv cov mis pleev xim puas sib xws?

3 nyob rau hauv kev tsim cov latex, cov ntsiab lus catalyst oxide seem ntawm qhov ntau.

4. Cov tshuaj ntawm lwm cov khoom ua kom tuab ntuj hauv cov mis pleev xim thiab qhov sib piv ntawm cov tshuaj nrog qib pleev ximHEC.)

5. nyob rau hauv cov txheej txheem ntawm kev ua xim, qhov kev txiav txim ntawm cov kauj ruam kom ntxiv cov thickener yog qhov tsim nyog.

6. Vim muaj kev ntxhov siab ntau dhau thiab cov av noo ntau dhau thaum lub sijhawm tawg paj.

7. Kev yaig ntawm cov khoom siv tuab.

Ntim: 

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