1. Khoom npe:
01. Tshuaj npe: hydroxypropyl methylcellulose
02. Lub npe ua lus Askiv: Hydroxypropyl Methyl Cellulose
03. English abbreviation: HPMC
2. Lub cev thiab tshuaj muaj zog:
01. Cov tsos: dawb los yog tawm-dawb hmoov.
02. Particle loj; pass tus nqi ntawm 100 mesh yog ntau dua 98.5%; tus pass tus nqi ntawm 80 mesh yog ntau tshaj 100%.
03. Carbonization kub: 280 ~ 300 ℃
04. Pom tseeb qhov ntom: 0.25～0.70/cm3 (feem ntau nyob ib ncig ntawm 0.5g/cm3), tshwj xeeb lub ntiajteb txawj nqus 1.26-1.31.
05. Discoloration kub: 190 ~ 200 ℃
06. Nto nro: 2% aqueous tov yog 42 ~ 56dyn / cm.
07. Soluble hauv dej thiab qee cov kuab tshuaj, xws li ethanol / dej, propanol / dej, trichloroethane, thiab lwm yam.
Cov kev daws teeb meem dej yog qhov chaw ua haujlwm. High transparency, ruaj khov kev ua tau zoo, gel kub ntawm cov khoom nrog txawv specifications
Qhov sib txawv, kev hloov pauv nrog cov viscosity, qhov qis dua qhov viscosity, ntau dua solubility, kev ua tau zoo ntawm qhov sib txawv specifications ntawm hydroxypropyl methylcellulose (HPMC) muaj qee qhov sib txawv, kev sib cais ntawm hydroxypropyl methylcellulose (HPMC) hauv dej tsis cuam tshuam rau PH tus nqi. .
08. Nrog rau qhov txo qis ntawm methoxyl cov ntsiab lus, cov ntsiab lus gel nce, cov dej solubility txo qis, thiab cov dej num ntawm hydroxypropyl methylcellulose (HPMC) kuj txo.
09. Hydroxypropyl methylcellulose (HPMC) kuj muaj peev xwm thickening, ntsev kuj, tsis tshua muaj tshauv hmoov, PH stability, dej tuav, seem stability, zoo heev zaj duab xis-tsim khoom, thiab ntau yam enzyme kuj, dispersion yam ntxwv xws li kev sib deev thiab adhesiveness.
Peb, hydroxypropyl methylcellulose (HPMC) cov yam ntxwv:
Cov khoom sib xyaw ua ke ntau lub cev thiab tshuaj lom neeg los ua ib yam khoom tshwj xeeb nrog ntau yam kev siv, thiab ntau yam khoom muaj raws li hauv qab no:
(1) Kev tuav dej: Nws tuaj yeem tuav dej ntawm qhov ntxeem tau xws li phab ntsa cement boards thiab cib.
(2) Kev tsim zaj duab xis: Nws tuaj yeem tsim cov pob tshab, tawv thiab mos zaj duab xis nrog cov roj zoo heev.
(3) Organic solubility: Cov khoom yog soluble nyob rau hauv ib co organic solvents, xws li ethanol / dej, propanol / dej, dichloroethane, thiab ib tug hnyav system muaj li ntawm ob organic solvents.
(4) Thermal gelation: Thaum lub aqueous tov ntawm cov khoom yog rhuab, nws yuav tsim ib tug gel, thiab cov tsim gel yuav los ua ib tug tov dua tom qab txias.
(5) Kev ua haujlwm saum npoo: Muab kev ua haujlwm saum npoo av hauv kev daws kom ua tiav qhov xav tau emulsification thiab kev tiv thaiv colloid, nrog rau theem stabilization.
(6) Kev ncua: Nws tuaj yeem tiv thaiv nag lossis daus ntawm cov khoom siv, yog li inhibiting qhov tsim ntawm sediment.
(7) Kev tiv thaiv colloid: nws tuaj yeem tiv thaiv cov tee dej thiab cov khoom los ntawm coalescing lossis coagulating.
(8) Adhesiveness: Siv los ua cov nplaum rau cov xim, cov khoom siv luam yeeb, thiab cov khoom siv ntawv, nws muaj kev ua tau zoo heev.
(9) Dej solubility: Cov khoom tuaj yeem yaj hauv dej hauv ntau qhov sib txawv, thiab nws qhov siab tshaj plaws tsuas yog txwv los ntawm viscosity.
(10) Non-ionic inertness: Cov khoom yog non-ionic cellulose ether, uas tsis ua ke nrog hlau ntsev los yog lwm yam ions los ua insoluble precipitates.
(11) Acid-base stability: haum rau siv nyob rau hauv thaj tsam ntawm PH3.0-11.0.
(12) Tasteless thiab tsw, tsis cuam tshuam los ntawm metabolism; siv los ua zaub mov thiab tshuaj ntxiv, lawv yuav tsis raug metabolized hauv cov zaub mov thiab yuav tsis muab calories.
4. Hydroxypropyl methylcellulose (HPMC) dissolution method:
Thaum cov khoom siv hydroxypropyl methylcellulose (HPMC) ncaj qha ntxiv rau dej, lawv yuav coagulate thiab tom qab ntawd yaj, tab sis qhov kev sib cais no qeeb heev thiab nyuaj. Muaj peb txoj hauv kev kom tshem tawm hauv qab no, thiab cov neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li lawv cov kev siv:
1. Cov txheej txheem dej kub: Txij li hydroxypropyl methylcellulose (HPMC) tsis yaj hauv dej kub, thawj theem ntawm hydroxypropyl methylcellulose (HPMC) tuaj yeem sib npaug hauv cov dej kub, thiab tom qab ntawd thaum nws txias, peb txoj kev raug piav qhia raws li raws li nram no:
1). Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom kub li 70 ° C. Maj mam ntxiv hydroxypropyl methylcellulose (HPMC) nyob rau hauv qeeb stirring, lub hydroxypropyl methylcellulose (HPMC) pib ntab rau saum npoo dej, thiab tom qab ntawd maj mam tsim cov slurry, txias cov slurry nyob rau hauv stirring.
2). Tshav kub 1/3 lossis 2/3 (yuav tsum tau) cov dej hauv lub thawv thiab kub rau 70 ° C. Raws li txoj kev ntawm 1), disperse hydroxypropyl methylcellulose (HPMC) los npaj cov dej kub slurry Tom qab ntawd ntxiv cov dej txias los yog dej khov rau hauv lub thawv, tom qab ntawd ntxiv cov lus hais saum toj no hydroxypropyl methylcellulose (HPMC) cov dej kub slurry rau lub dej txias, thiab do, thiab ces txias qhov sib tov.
3). Ntxiv 1/3 los yog 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab kub rau 70 ° C. Raws li txoj kev 1), disperse hydroxypropyl methylcellulose (HPMC) los npaj cov dej kub slurry; Tom qab ntawd cov dej txias los yog dej khov ntxiv ntxiv rau cov dej kub slurry thiab qhov sib tov yog txias tom qab nplawm.
2. Powder mixing method: hydroxypropyl methylcellulose (HPMC) hmoov cov khoom thiab qhov sib npaug lossis ntau dua ntawm lwm cov khoom xyaw hmoov tau tawg tag nrho los ntawm kev sib xyaw qhuav, thiab tom qab ntawd yaj hauv dej, ces hydroxypropyl methylcellulose Base cellulose (HPMC) tuaj yeem yaj yam tsis muaj agglomeration. . 3. Organic solvent wetting method: pre-disperse los yog ntub hydroxypropyl methylcellulose (HPMC) nrog cov organic solvents xws li ethanol, ethylene glycol lossis roj, thiab tom qab ntawd yaj hauv dej. Nyob rau lub sijhawm no, hydroxypropyl methylcellulose (HPMC) tuaj yeem yaj tau zoo.
5. Kev siv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC):
Hydroxypropyl methylcellulose (HPMC) tuaj yeem siv los ua cov thickener, dispersant, emulsifier thiab film-forming agent. Nws cov khoom lag luam-qib tuaj yeem siv rau hauv cov tshuaj niaj hnub, khoom siv hluav taws xob, hluavtaws resins, kev tsim kho thiab txheej txheej.
1. Suspension polymerization:
Hauv kev tsim cov khoom siv hluavtaws xws li polyvinyl chloride (PVC), polyvinylidene chloride thiab lwm yam copolymer, ncua kev kawm polymerization feem ntau yog siv thiab tsim nyog los tswj qhov kev ncua ntawm hydrophobic monomers hauv dej. Raws li cov dej-soluble polymer, hydroxypropyl methylcellulose (HPMC) cov khoom muaj kev ua haujlwm zoo heev thiab ua raws li kev tiv thaiv colloidal, uas tuaj yeem tiv thaiv kev sib sau ntawm cov khoom polymer. Tsis tas li ntawd, txawm hais tias hydroxypropylmethylcellulose (HPMC) yog cov dej-soluble polymer, nws kuj yog me ntsis soluble nyob rau hauv hydrophobic monomers thiab tsub kom lub porosity ntawm monomers los ntawm cov polymeric particles yog tsim, thiaj li hais tias nws muaj peev xwm muab polymers nrog zoo heev muaj peev xwm tshem tawm cov seem monomers. thiab txhim khu kev nqus ntawm plasticizers.
2. Hauv kev tsim cov khoom siv hauv tsev, hydroxypropyl methylcellulose (HPMC) tuaj yeem siv rau:
1). Adhesive thiab caulking tus neeg saib xyuas rau gypsum-raws li daim kab xev;
2). Kev sib khi ntawm cov cement-based cib, vuas thiab hauv paus;
3). plasterboard-raws li stucco;
4). cement-based structural plaster;
5). Nyob rau hauv cov qauv ntawm cov xim thiab xim Remover.
Post lub sij hawm: May-24-2023