Methyl hydroxyethyl cellulose npaj?

Tom qab thiab Txheej txheem cej luam

Cellulose ether yog cov tshuaj lom neeg polymer cov khoom siv los ntawm cov polymer cellulose los ntawm kev kho tshuaj lom neeg. Tom qab ua cov khoom siv cellulose nitrate thiab cellulose acetate ntawm ntau cov neeg hais lus ntawm cellulose tau pom tsis tu ncua, muaj feem xyuam nrog ntau cov kev lag luam. Cellulose ether cov khoom xws li sodium carboxymethyl cellulose (HPC), tshuaj tua kab cellulropyl (HPC), Hydrod HydroDropE "thiab tau Dav siv hauv roj drilling, tsim kho, tsho loj, khoom noj, tshuaj thiab tshuaj txhua hnub.

Hydroxyethy cellulose (MHPC) yog cov ntxhiab tsw, tsis muaj kuab dawb uas tuaj yeem yaj hauv dej txias. Nws muaj cov yam ntxwv ntawm thickening, khi, emulsifying, zaj duab xis, tswj kev ua yeeb yam, tswj kev noo thiab tiv thaiv kev sib deev. Vim yog cov chaw ua haujlwm nquag ua haujlwm ntawm cov kua aqueous, nws tuaj yeem siv ua tus sawv cev ntawm tus neeg sawv cev sib xyaw, emulsifier thiab dispersant. Hydroxyether methylenose aqueous kua txiv muaj zoo hydrophilicity thiab yog ib tug neeg siv dej ua haujlwm zoo. Vim tias hydroxyethyl methylulose muaj cov pab pawg hydroxyethyl, zoo viscosity muaj peev xwm thiab mildew kuj thaum lub sij hawm ntev cia.

Hydroxyether methylcellulose (HEMC) tau npaj los ntawm kev tshwm sim ethylene oxide hloov ethylcellose (MC), thiab nws cov ntsev tsis zoo yog qhov zoo dua li ntawm cov neeg polymers. Lub gelation kub ntawm methylcellulose kuj tseem siab dua li ntawm MC.

Lub tsev

Yam zoo

Cov yam ntxwv tseem ceeb ntawm hydroxyethy methylcellulose (hemc) yog:

1. Solubility: soluble hauv dej thiab qee cov kuab tshuaj organic. HEMC tuaj yeem raug ntiab tawm hauv dej txias. Nws lub siab tshaj plaws yog tsuas yog txiav txim siab los ntawm viscosity. Solubility sib txawv nrog viscosity. Qhov qis dua viscosity, muaj ntau dua cov solubility.

2. Ntsev tsis kam: HEMSIC Cellulose muaj kev hais txog kev ua haujlwm, tab sis lawv tsis tshua muaj cov tshuaj electrolytes muaj peev xwm ua rau gelation thiab nag lossis daus.

3. Cov kev ua si saum npoo av: Vim tias cov kev ua haujlwm saum npoo hlau ntawm cov aqueous, nws tuaj yeem siv los ua tus neeg sawv cev sib xyaw, emulsifier thiab dispersant.

4. Thermal gel: When the aqueous solution of HEMC products is heated to a certain temperature, it becomes opaque, gels, and precipitates, but when it is continuously cooled, it returns to the original solution state, and the temperature at which this gel and precipitation occurs is mainly Depending on them lubricants, suspending aids, protective colloids, emulsifiers etc.

5. Cov tshuaj tsw qab thiab tsw thiab tsw qab: hemc tau siv dav hauv cov zaub mov thiab tshuaj vim tias nws yuav tsis muaj metabolized thiab muaj ntxhiab tsw thiab tsw qab.

6. Mildew Refillance: HEMC muaj qhov zoo dua mildew tsis kam thiab zoo viscosity stabilabe thaum lub sij hawm ntev cia.

7.

Daim ntawv thov

Hydroxyethy yuav siv tau los ua tus sawv cev ntawm tus neeg sawv cev sib xyaw, emulsifier thiab dispersant vim nws txoj haujlwm qub hauv aqueous. Nws cov ntawv thov yog li nram qab no:

1. Cov nyhuv ntawm hydroxyethyl metthylcellulose ntawm Maas kev ua tau zoo. Hydroxyether methylulose yog qhov tsw, tsis muaj kuab dawb uas tuaj yeem yaj nyob rau hauv dej txias los tsim cov tshuaj pleev pob tshab. Nws muaj cov yam ntxwv ntawm thickening, khi, emulsifying, zaj duab xis, tswj kev ua yeeb yam, tswj kev noo thiab tiv thaiv kev sib deev. Vim tias cov kev daws teeb meem muaj cov chaw ua haujlwm nquag ua haujlwm, nws tuaj yeem siv los ua tus neeg sawv cev sib xyaw, emulsifier thiab dispersant. Hydroxyether methylenose aqueous kua txiv muaj zoo hydrophilicity thiab yog ib tug neeg siv dej ua haujlwm zoo.

2. Tus pleev xim yooj yim yog npaj, uas yog ua los ntawm cov ntaub ntawv raw hauv seem hauv qab no: 150-200 g ntawm de deion dej; 60-70 g ntawm acrylic emulsion; 550-650 g ntawm calcium hnyav; 70-90 g ntawm talcum hmoov; Puag Cellulose aqueous kua 30-40G; Ligocellulose aqueous aqueous aqueous aqueous 10-20g; Zaj duab xis-ua kev pab 4-6g; Antiseptic thiab fungicide 1.5-2.5g; Dispersant 1.8-2.2G; Tus neeg sawv cev ntub dej 1.8-2.2G; 3.5-4.5g; Ethylene glycol 9-11g; Lub Hydroxyether Metylcellulose auchous kua txiv yog tsim los ntawm dissolving almolving 2-4% hydroxyethy metherylulose hauv dej; Lub Lignocellulose aqueous kua yog ua los ntawm 1-3% lignocellulose yog tsim los ntawm dissolving hauv dej.

Kev npaj

Ib txoj kev npaj ntawm hydroxyethyl methyl cellulose, tus txheej txheem yog tias ethylene oxide yog siv los ua tus sawv cev rethylet los npaj hydrothetyl methyl methyl cellulose. Qhov hnyav ntawm cov ntaub ntawv raw rau kev npaj hydroxyethyl obthoth, 80-80 ntu ntawm cov methyl chloride, 16-19 ntu ntawm cov acetic acid; Cov kauj ruam tshwj xeeb yog:

Thawj kauj ruam, hauv cov tshuaj tiv thaiv kab mob, ntxiv toluene thiab isopropanol sib tov, dej, ua kom sov li 60-80 ° C, kom sov rau 20-40 feeb;

Qhov thib ob kauj ruam, alkalization: txias cov ntaub ntawv saum toj no rau 30-50 ° Cib, thiab nqa tawm tom qab hloov tshiab alkaligent, thiab muaj alkalization kub yog 30 ° C txog 50 ° C;

Qhov thib peb, etherification: Tom qab ua tiav tiav, tus reactor tau khiav tawm mus rau 0.0.07MPA, thiab methyl chloride ntxiv rau 30-50 feeb; Thawj theem ntawm etherification: 40-60 ° C, 1.0-2.0 teev, lub siab yog tswj hwm ntawm 0.15 thiab 0.3mpa; Qhov thib ob ntawm ethermalation: 60 ~ 90 ℃, 2.0 ~ 2.5 teev, lub siab yog tswj hwm ntawm 0.4 thiab 0.8mpa;

Cov kauj ruam plaub, nruab nrab: Ntxiv cov ntsuas glacial acetic acid ua ntej, ntsuas qhov kub thiab txias rau 302 ° C, thiab tus lej P P P Lub Tank Directolventation Tank tau sau nrog kais dej kho los ntawm kev rov qab osmosis ntaus ntawm 90 ° C;

Cov kauj ruam thib tsib, centrifugal ntxuav: cov khoom siv hauv cov theem plaub yog centrifuged los ntawm kab rov tav uas muaj dej txias ua ntej rau kev ntxuav cov khoom;

Lub kauj ruam rau, centrifugal kom qhuav: cov khoom ntxuav tau yooj yim rau hauv lub tshuab ziab khaub ncaws, thiab cov khoom qhuav ntawm 150-170 ° C, thiab cov khoom qhuav yog crushed thiab ntim.

Piv nrog cov cellulose uas twb muaj lawm ether Ntau lawm siv ethylene olicyl methyl methyl cellulose vim tias muaj cov pab pawg hydroxyethyl. Nws muaj zoo viscosity stability thiab mildew kuj thaum lub sij hawm ntev cia. Nws tuaj yeem raug siv hloov lwm yam kev ua neeg paub txog cellulose.