Txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev - hydroxypropyl methylcellulose

Hydroxypropyl methylcellulose (HPMC luv luv) yog ib qho tseem ceeb sib xyaw ether, uas yog non-ionic dej-soluble polymer, thiab yog dav siv nyob rau hauv cov zaub mov, tshuaj, tshuaj niaj hnub kev lag luam, txheej, polymerization cov tshuaj tiv thaiv thiab kev tsim kho raws li ib tug dispersion ncua kev kawm ntawv, thickening, emulsifying, stabilizing thiab adhesives, thiab lwm yam, thiab muaj qhov sib txawv loj hauv kev lag luam hauv tsev.

Hydroxypropyl methylcellulose yog dav siv nyob rau hauv kev tsim kho kev lag luam raws li ib tug zaj duab xis-tsim tus neeg saib xyuas, binder, dispersant, stabilizer, thickener, dej txhawb, thiab lwm yam.

Hydroxypropylmethylcellulose

Lus Askiv lub npe: Hydroxypropyl Methyl Cellulose English abbreviation: HPMC

Vim tias HPMC muaj cov khoom zoo heev xws li thickening, emulsification, film forming, tiv thaiv colloid, noo noo retention, adhesion, enzyme kuj thiab metabolic inertness, nws yog dav siv nyob rau hauv coatings, polymerization cov tshuaj tiv thaiv, lub tsev cov ntaub ntawv, roj ntau lawm, textiles, zaub mov, tshuaj, Txhua hnub siv ceramics, cov khoom siv hluav taws xob thiab cov noob qoob loo ua liaj ua teb thiab lwm lub tuam tsev.

khoom siv tsev

Hauv cov khoom siv hauv tsev, HPMC lossis MC feem ntau yog ntxiv rau cov cement, mortar, thiab mortar los txhim kho kev tsim kho thiab dej tuav cov khoom.

Yuav siv tau li:

1). Adhesive thiab caulking tus neeg saib xyuas rau gypsum-raws li daim kab xev;

2). Kev sib txuas ntawm cov cement-based cib, vuas thiab cov hauv paus;

3). plasterboard-raws li stucco;

4). cement-based structural plaster;

5). Nyob rau hauv cov qauv ntawm cov xim thiab xim Remover.

Adhesive rau ceramic vuas

HPMC 15.3 ntu

Perlite 19.1 ntu

Fatty amides thiab cyclic thio compounds 2.0 qhov chaw

Clay 95.4 ntu

Silica seasoning (22μ) 420 qhov chaw

450.4 ntu dej

Siv nyob rau hauv cov cement sib txuas nrog inorganic cib, vuas, pob zeb los yog cement:

HPMC (dispersion degree 1.3) 0.3 qhov chaw

Cattelan cement 100 qhov chaw

Silica xuab zeb 50 qhov chaw

50 feem ntawm cov dej

Siv raws li lub zog siab-zog cement tsev cov khoom siv ntxiv:

Cattelan cement 100 qhov chaw

Asbestos 5 qhov chaw

Polyvinyl cawv kho 1 part

Calcium silicate 15 qhov chaw

Av nplaum 0.5 ntu

32 ntu dej

HPMC 0.8 ntu

Xim kev lag luam

Hauv kev lag luam pleev xim, HPMC feem ntau yog siv rau hauv cov xim latex thiab dej-soluble resin xim cov khoom ua cov yeeb yaj kiab tsim, thickener, emulsifier thiab stabilizer.

Suspension Polymerization ntawm PVC

Qhov chaw uas muaj kev noj ntau tshaj plaws ntawm HPMC cov khoom hauv kuv lub tebchaws yog qhov ncua kev kawm polymerization ntawm vinyl chloride. Nyob rau hauv lub ncua kev kawm ntawv polymerization ntawm vinyl chloride, lub dispersion system ncaj qha cuam tshuam qhov zoo ntawm cov khoom PVC cob thiab nws ua thiab cov khoom; Nws tuaj yeem txhim kho cov thermal stability ntawm cov resin thiab tswj cov particle loj tis (uas yog, kho qhov ntom ntawm PVC). Tus nqi ntawm HPMC tso nyiaj rau 0.025% ~ 0.03 ntawm PVC tso zis %.

PVC resin npaj los ntawm high-zoo HPMC, ntxiv rau kom ntseeg tau tias kev ua tau zoo raws li lub teb chaws tus qauv, kuj muaj lub cev zoo, zoo heev particle yam ntxwv thiab zoo heev yaj rheological cwj pwm.

lwm yam kev lag luam

Lwm qhov kev lag luam feem ntau suav nrog cov tshuaj pleev ib ce, roj ntau lawm, tshuaj ntxuav tes, khoom siv hauv tsev thiab lwm yam lag luam.

dej soluble

HPMC yog ib qho ntawm cov dej-soluble polymers, thiab nws cov dej solubility muaj feem xyuam rau cov ntsiab lus ntawm methoxyl pawg. Thaum cov ntsiab lus ntawm methoxyl pab pawg tsawg, nws tuaj yeem yaj hauv cov alkali muaj zog thiab tsis muaj qhov ntsuas kub kub. Nrog rau qhov nce ntawm methoxyl cov ntsiab lus, nws yog rhiab heev rau dej o thiab soluble nyob rau hauv dilute alkali thiab qaug zog alkali. Thaum cov ntsiab lus methoxyl yog> 38C, nws tuaj yeem yaj hauv dej, thiab tseem tuaj yeem yaj hauv halogenated hydrocarbons. Yog hais tias periodic acid ntxiv rau HPMC, HPMC yuav sai sai disperse nyob rau hauv dej yam tsis muaj insoluble caking tshuaj. Qhov no feem ntau yog vim qhov tseeb tias cov kua qaub muaj cov dihydroxyl pawg nyob rau hauv ortho txoj hauj lwm ntawm dispersed glycogen.