1. Txheej txheem cej luam
Hydroxypropyl Methyl Cellulose (HPMC) yog ib qho uas tsis yog-ionic cellulose ether ua los ntawm cov khoom siv polymer - cellulose los ntawm cov txheej txheem tshuaj lom neeg. Hydroxypropyl methylcellulose (HPMC) yog ib qho tsis muaj ntxhiab, tsis muaj ntxhiab, tsis muaj tshuaj lom nws tus kheej xim hmoov, uas tuaj yeem yaj hauv dej txias los tsim cov kua nplaum pob tshab, uas muaj cov haujlwm ntawm thickening, bonding, dispersing, emulsifying, film-forming, thiab suspending, adsorption, gelation, deg kev ua si, noo noo tuav thiab tiv thaiv colloid zog.
Hydroxypropyl methylcellulose (HPMC) tuaj yeem siv rau hauv cov khoom siv hauv tsev, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textiles, kev ua liaj ua teb, tshuaj pleev ib ce thiab luam yeeb industries.
2, Cov khoom specifications thiab kev faib cov khoom yog muab faib ua dej txias soluble hom S thiab hom zoo tib yam
Common Specifications ntawmHydroxypropyl Methyl Cellulose
| khoom | MC | HPMC | ||||
| E | F | J | K | |||
| Methoxy | cov ntsiab lus (%) | 27.0-32.0 Nws | 28.0-30.0 Nws | 27.0-30.0 Nws | 16.5-20.0 Nws | 19.0-24.0 Nws |
| Degree ntawm kev hloov DS | 1.7-1.9 Nws | 1.7-1.9 Nws | 1.8-2.0 Nws | 1.1 ~ 1.6 | 1.1 ~ 1.6 | |
| Hydroxypropoxy | cov ntsiab lus (%) | 7.0-12.0 Nws | 4-7.5 Nws | 23.0-32.0 Nws | 4.0-12.0 Nws | |
| Degree ntawm kev hloov DS | 0.1 ~ 0.2 hli | 0.2 ~ 0.3 hli | 0.7 ~ 1.0 | 0.1 ~ 0.3 hli | ||
| Moisture (Wt%) | ≤5.0 | |||||
| Tshauv (Wt%) | ≤1.0 | |||||
| PHvalue | 5.0 ~ 8.5 hli | |||||
| Sab nrauv | milky dawb granule hmoov los yog dawb granule hmoov | |||||
| Kev zoo | 80 ua fej | |||||
| viscosity (mPa.s) | saib viscosity specification | |||||
Specification ntawm viscosity
| Specification | Viscosity ntau (mpa.s) | Specification | Viscosity ntau (mpa.s) |
| 5 | 3 ~ 9 | 8000 | 7000-9000 |
| 15 | 10 ~ 20 | 10000 | 9000-11000 Nws |
| 25 | 20-30 Nws | 20000 | 15000-25000 |
| 50 | 40 ~ 60 | 40000 | 35000-45000 |
| 100 | 80-120 | 60000 | 46000-65000 |
| 400 | 300-500 | 80000 | 66 000 ~ 84 000 Nws |
| 800 | 700-900 Nws | 100000 | 85000-120000 |
| 1500 | 1200-2000 Nws | 150000 | 130000-180000 |
| 4000 | 3500-4500 | 200000 | ≥180000 |
3,yam khoom
Properties: Cov khoom no yog cov hmoov dawb los yog tawm-dawb, tsis muaj ntxhiab, tsis qab thiabtsis muaj tshuaj lom.
Dej solubility thiab thickening muaj peev xwm: Cov khoom no tuaj yeem yaj hauv dej txias los tsim cov kua nplaum pob tshab.
Dissolution nyob rau hauv cov kuab tshuaj organic: Vim hais tias nws muaj ib tug npaum li cas ntawm hydrophobic methoxyl pawg, cov khoom no yuav yaj nyob rau hauv ib co organic solvents, thiab kuj yuav yaj nyob rau hauv cov kuab tshuaj tov nrog dej thiab organic teeb meem.
Ntsev tsis kam: Txij li cov khoom no yog cov khoom tsis yog-ionic polymer, nws yog qhov ruaj khov nyob rau hauv aqueous daws ntawm hlau ntsev los yog organic electrolytes.
Kev ua haujlwm saum npoo: Cov kua dej aqueous ntawm cov khoom no muaj cov haujlwm saum npoo av, thiab muaj cov haujlwm thiab cov khoom xws li emulsification, tiv thaiv colloid thiab txheeb ze stability.
Thermal gelation: Thaum cov tshuaj aqueous ntawm cov khoom no yog rhuab mus rau ib tug tej yam kub, nws yuav opaque mus txog rau thaum nws tsim ib (poly) flocculation xeev, yog li ntawd cov tshuaj poob nws viscosity. Tab sis tom qab txias, nws yuav tig mus rau hauv cov tshuaj qub qub dua. Qhov kub ntawm qhov gelation tshwm sim nyob ntawm hom khoom, qhov concentration ntawm cov tshuaj thiab tus nqi cua sov.
PH stability: Lub viscosity ntawm aqueous tov ntawm cov khoom no yog ruaj khov nyob rau hauv qhov ntau ntawm PH3.0-11.0.
Cov nyhuv dej khaws cia: Txij li cov khoom no yog hydrophilic, nws tuaj yeem muab ntxiv rau hauv mortar, gypsum, xim, thiab lwm yam kom tswj tau cov dej zoo hauv cov khoom.
Kev tuav pov hwm zoo: Piv nrog rau lwm cov dej-soluble polymers, cov tshuaj aqueous ntawm cov khoom no muaj cov khoom tshwj xeeb viscoelastic. Nws qhov sib ntxiv muaj peev xwm ua kom cov duab ntawm extruded ceramic khoom tsis hloov.
Lubricity: Ntxiv cov khoom no tuaj yeem txo qhov kev sib txhuam coefficient thiab txhim kho lubricity ntawm extruded ceramic khoom thiab cov khoom cement.
Zaj duab xis-tsim cov khoom: Cov khoom no tuaj yeem tsim tau yooj yim, pob tshab zaj duab xis nrog cov khoom siv zoo heev, thiab muaj cov roj zoo thiab muaj roj.
4. Lub cev thiab tshuaj muaj zog
Particle loj: 100 mesh pass tus nqi yog ntau dua 98.5%, 80 mesh pass tus nqi yog 100%
Carbonization kub: 280 ~ 300 ℃
Pom meej ntom ntom: 0.25 ~ 0.70 / cm 1.26 ~ 1.31
Discoloration kub: 190 ~ 200 ℃
Nto nro: 2% aqueous tov yog 42 ~ 56dyn / cm
Solubility: Soluble hauv dej thiab qee cov kuab tshuaj, cov tshuaj aqueous muaj cov dej num saum npoo av. Siab pob tshab. Kev ua haujlwm ruaj khov, solubility hloov pauv nrog viscosity, qis dua viscosity, ntau dua solubility.
HPMC kuj muaj cov yam ntxwv ntawm thickening peev xwm, ntsev tsis kam, PH stability, dej tuav, seem stability, zoo heev zaj duab xis-tsim khoom, thiab ntau yam enzyme kuj, dispersibility thiab cohesiveness.
5, lub hom phiaj tseem ceeb
Kev lag luam qib HPMC feem ntau yog siv los ua ib qho dispersant hauv kev tsim cov polyvinyl chloride, thiab yog tus neeg sawv cev tseem ceeb rau kev npaj PVC los ntawm kev ncua polymerization. Tsis tas li ntawd, nws tuaj yeem siv los ua cov thickener, stabilizer, emulsifier, excipient, thiab dej tuav tus neeg sawv cev hauv kev tsim khoom ntawm lwm yam petrochemicals, coatings, cov ntaub ntawv hauv tsev, cov xim tshem tawm, tshuaj ua liaj ua teb, inks, textile printing thiab dyeing, ceramics, ntawv. , tshuaj pleev ib ce, thiab lwm yam, zaj duab xis tsim tus neeg sawv cev, thiab lwm yam. Daim ntawv thov nyob rau hauv cov khoom siv hluavtaws tuaj yeem ua rau cov khoom tau muaj cov yam ntxwv ntawm cov khoom tsis tu ncua thiab xoob, haum rau lub ntiajteb txawj nqus thiab kev ua haujlwm zoo, yog li pib hloov gelatin thiab polyvinyl cawv raws li dispersants.
Rau kev sib cais:
(1). Nqa cov dej kub uas xav tau, muab tso rau hauv lub thawv thiab kub kom siab tshaj 80 ° C, thiab maj mam ntxiv cov khoom no nyob rau hauv qeeb stirring. Cov cellulose ntab saum npoo dej thaum xub thawj, tab sis maj mam dispersed los ua ib qho slurry. Cov tshuaj tau txias thaum stirring.
(2). Xwb, cua sov 1/3 los yog 2/3 ntawm cov dej kub kom siab tshaj 85 ° C, ntxiv cellulose kom tau ib tug dej kub slurry, ces ntxiv cov seem ntawm cov dej txias, stirring, thiab txias lub resulting sib tov.
(3). Lub mesh ntawm cellulose yog qhov zoo, thiab nws tshwm sim raws li ib tug neeg me me nyob rau hauv cov hmoov sib tov sib xyaw, thiab nws yaj sai sai thaum nws ntsib dej los tsim cov viscosity xav tau.
(4). Maj mam thiab sib npaug ntxiv cellulose nyob rau hauv chav tsev kub, stirring tas li kom txog thaum lub pob tshab tov yog tsim.
Post lub sij hawm: Jan-11-2023