Txhim kho kev ua tau zoo ntawm cov ntaub ntawv siv hauv tsev - hydroxypropyl methylcellulose

Hydroxypropyl methylcellulose (HPMC luv luv) yog ib qho tseem ceeb sib xyaw ether, uas yog cov polymer uas tsis yaj hauv dej, thiab siv dav hauv cov khoom noj, tshuaj, kev lag luam tshuaj txhua hnub, txheej, polymerization reaction thiab kev tsim kho ua cov khoom siv dispersion suspension, thickening, emulsifying, stabilizing thiab adhesives, thiab lwm yam, thiab muaj qhov sib txawv loj hauv kev lag luam hauv tsev.

Hydroxypropyl methylcellulose yog siv dav hauv kev lag luam kev tsim kho ua tus neeg sawv cev tsim zaj duab xis, binder, dispersant, stabilizer, thickener, water promoter, thiab lwm yam, thiab nws tau dhau los ua cov khoom lag luam tseem ceeb uas tau nyiam mloog txij li thaum nws tau tso tawm ntawm kab.

Hydroxypropylmethylcellulose

Lub npe tag nrho lus Askiv: Hydroxypropyl Methyl Cellulose Lus Askiv luv: HPMC

Vim tias HPMC muaj cov khoom zoo heev xws li thickening, emulsification, zaj duab xis tsim, tiv thaiv colloid, noo noo khaws cia, adhesion, enzyme tsis kam thiab metabolic inertness, nws yog dav siv hauv coatings, polymerization reactions, tsev cov ntaub ntawv, roj ntau lawm, textiles, khoom noj, tshuaj, Txhua hnub-siv ceramics, khoom siv hluav taws xob thiab noob ua liaj ua teb thiab lwm lub chaw haujlwm.

cov ntaub ntawv siv hauv tsev

Hauv cov ntaub ntawv tsim kho, HPMC lossis MC feem ntau yog ntxiv rau cov cement, mortar, thiab mortar los txhim kho kev tsim kho thiab cov khoom khaws cia dej.

Siv tau ua:

1). Cov nplaum thiab cov neeg sawv cev caulking rau cov kab xev nplaum gypsum;

2). Kev sib txuas ntawm cov cib, cov vuas thiab cov hauv paus uas ua los ntawm cement;

3). Cov plasterboard-raws li stucco;

4). Cov cement-based structural plaster;

5). Hauv cov mis ntawm cov xim thiab cov tshuaj pleev xim.

Cov nplaum rau cov vuas ceramic

HPMC 15.3 qhov chaw

Perlite 19.1 qhov chaw

Cov roj amides thiab cov tshuaj cyclic thio 2.0 qhov chaw

Av nplaum 95.4 qhov chaw

Silica seasoning (22μ) 420 qhov chaw

450.4 feem ntawm dej

Siv rau hauv cov cement bonded nrog inorganic bricks, vuas, pob zeb lossis cement:

HPMC (kev tawg qib 1.3) 0.3 qhov

Cattelan cement 100 qhov chaw

Silica xuab zeb 50 qhov chaw

50 qhov ntawm dej

Siv ua cov khoom siv cement siab zog:

Cattelan cement 100 qhov chaw

Asbestos 5 qhov chaw

Kho cov cawv polyvinyl 1 feem

Calcium silicate 15 qhov chaw

Av nplaum 0.5 qhov

32 qhov dej

HPMC 0.8 qhov chaw

Kev lag luam pleev xim

Hauv kev lag luam pleev xim, HPMC feem ntau yog siv rau hauv cov xim latex thiab cov khoom siv pleev xim uas yaj tau hauv dej ua tus neeg sawv cev tsim zaj duab xis, cov khoom ua kom tuab, cov khoom ua kom emulsifier thiab cov khoom ruaj khov.

Kev ncua polymerization ntawm PVC

Lub teb uas siv cov khoom HPMC ntau tshaj plaws hauv kuv lub teb chaws yog kev ncua polymerization ntawm vinyl chloride. Hauv kev ncua polymerization ntawm vinyl chloride, lub kaw lus dispersion cuam tshuam ncaj qha rau qhov zoo ntawm cov khoom PVC resin thiab nws cov txheej txheem thiab cov khoom; nws tuaj yeem txhim kho qhov thermal stability ntawm cov resin thiab tswj qhov loj me ntawm cov khoom me me (uas yog, kho qhov ceev ntawm PVC). Tus nqi ntawm HPMC suav rau 0.025% ~ 0.03 ntawm PVC cov zis%.

Cov PVC resin uas tau npaj los ntawm HPMC zoo, ntxiv rau kev ua kom ntseeg tau tias qhov kev ua tau zoo ua tau raws li tus qauv hauv tebchaws, kuj muaj cov khoom zoo, cov yam ntxwv zoo heev thiab cov cwj pwm rheological yaj zoo heev.

lwm yam kev lag luam

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

dej yaj tau

HPMC yog ib qho ntawm cov polymers uas yaj tau hauv dej, thiab nws cov dej yaj tau muaj feem cuam tshuam nrog cov ntsiab lus ntawm pawg methoxyl. Thaum cov ntsiab lus ntawm pawg methoxyl qis, nws tuaj yeem yaj hauv cov alkali muaj zog thiab tsis muaj qhov taw qhia thermodynamic gelation. Nrog rau kev nce ntawm cov ntsiab lus methoxyl, nws muaj kev nkag siab ntau dua rau cov dej o thiab yaj hauv cov alkali dilute thiab cov alkali tsis muaj zog. Thaum cov ntsiab lus methoxyl yog> 38C, nws tuaj yeem yaj hauv dej, thiab kuj tuaj yeem yaj hauv cov hydrocarbons halogenated. Yog tias cov kua qaub periodic ntxiv rau HPMC, HPMC yuav tawg sai sai hauv dej yam tsis tsim cov tshuaj caking uas tsis yaj. Qhov no yog vim qhov tseeb tias cov kua qaub periodic muaj cov pab pawg dihydroxyl nyob rau hauv txoj haujlwm ortho ntawm cov glycogen uas tawg.