Feem ntau siv cellulose ethers muaj xws li HEC, HPMC, CMC, PAC, MHEC thiab lwm yam. Non-ionic dej-soluble cellulose ether muaj adhesiveness, dispersion stability thiab dej tuav lub peev xwm, thiab yog ib tug nquag siv additive rau lub tsev cov ntaub ntawv. HPMC, MC lossis EHEC yog siv nyob rau hauv feem ntau cov cement-based lossis gypsum-raws li kev tsim kho, xws li masonry mortar, cement mortar, cement txheej, gypsum, cementitious sib tov, thiab milky putty, thiab lwm yam. thiab zoo heev txhim kho Adhesion, uas yog ib qho tseem ceeb heev rau plaster, pobzeb cement thiab putty. HEC yog siv rau hauv cov cement, tsis yog tsuas yog ua cov retarder, tab sis kuj yog cov dej tuav cov neeg sawv cev. HEHPC kuj muaj daim ntawv thov no.
Hydroxypropyl methylcellulose HPMC cov khoom siv ua ke ntau lub cev thiab tshuaj lom neeg rau hauv cov khoom tshwj xeeb nrog ntau yam kev siv thiab cov khoom:
Kev tuav dej: Nws tuaj yeem khaws cov dej ntawm qhov ntxeem tau xws li phab ntsa cement boards thiab cib.
Film-forming: Nws tuaj yeem tsim cov pob tshab, tawv thiab mos zaj duab xis nrog cov roj zoo heev.
Organic solubility: Cov khoom yog soluble nyob rau hauv ib co organic solvents, xws li cov proportions tsim nyog ntawm ethanol / dej, propanol / dej, dichloroethane thiab ib tug hnyav system muaj li ntawm ob organic solvents.
Thermal gelation: Thaum cov tshuaj aqueous ntawm cov khoom yog rhuab, ib tug gel yuav tsim, thiab cov tsim gel yuav tig rov qab mus rau hauv ib tug tov thaum txias.
Deg kev ua si: Muab cov dej num saum npoo av hauv kev daws kom ua tiav qhov xav tau emulsification thiab tiv thaiv colloids, nrog rau theem stabilization.
Ncua tseg: Hydroxypropyl methylcellulose tiv thaiv cov khoom ntawm qhov chaw, yog li inhibiting qhov tsim ntawm sediments.
Kev Tiv Thaiv Colloids: Tiv thaiv cov tee dej thiab cov khoom los ntawm coalescing lossis coagulating.
Dej Soluble: Cov khoom tuaj yeem yaj hauv dej hauv ntau qhov sib txawv, qhov siab tshaj plaws tsuas yog txwv los ntawm viscosity.
Non-ionic inertness: Cov khoom no yog non-ionic cellulose ether uas tsis ua ke nrog hlau ntsev los yog lwm yam ions los ua insoluble precipitates.
Acid-base stability: haum rau siv nyob rau hauv thaj tsam ntawm PH3.0-11.0.
Post lub sij hawm: Sep-22-2022