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.
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.
Bcov ntaub ntawv siv rau kev tsim vaj 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.
HPMC siv tau rau:
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 (qib ntawm kev sib kis 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 txog 0.025% ~ 0.03% ntawm cov zis PVC.
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.
Okev lag luam lwm yam
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.
Wdej 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.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-07-2022