HPMC Properties yog dab tsi?

Feem ntau siv cellulose ethers muaj xws li HEC, HPMC, CMC, PAC, MHEC, thiab lwm yam. Noionic dej-soluble cellulose ether muaj cohesiveness, dispersion stability thiab dej tuav, thiab yog ib qho tseem ceeb 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, uas tuaj yeem txhim kho qhov tawg ntawm cov cement lossis xuab zeb 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 raws li ib tug retarder, tab sis kuj raws li ib tug water-retaining agent, thiab HEHPC kuj siv nyob rau hauv no hais txog. MC lossis HEC feem ntau siv ua ke nrog CMC ua ib feem ntawm cov ntawv ntsa. Nruab nrab-viscosity los yog high-viscosity cellulose ethers feem ntau yog siv nyob rau hauv wallpaper glued tsev cov ntaub ntawv.

Hydroxypropyl methylcellulose yog sivHPMCfeem ntau yog siv rau hauv cov khoom siv sab hauv thiab sab nrauv phab ntsa putty hmoov nrog viscosity ntawm 100,000 cellulose, nyob rau hauv qhuav hmoov mortar, diatom av nkos thiab lwm yam khoom siv hauv tsev, cellulose nrog viscosity ntawm 200,000 feem ntau yog siv, thiab nyob rau hauv nws tus kheej-leveling thiab lwm yam. tshwj xeeb mortars, cellulose nrog viscosity ntawm 400 feem ntau yog siv. Viscosity cellulose, cov khoom no muaj cov dej tuav zoo, cov nyhuv thickening zoo thiab ruaj khov zoo. HPMC yog dav siv hauv kev lag luam khoom siv hauv tsev thiab siv ntau heev. Cellulose tuaj yeem siv los ua ib qho retarder, dej retention agent, thickener thiab binder. Cellulose ether plays lub luag haujlwm tseem ceeb hauv cov khoom sib xyaw qhuav zoo tib yam, sab nrauv phab ntsa rwb thaiv tsev mortar, self-leveling mortar, qhuav hmoov plastering adhesive, pobzeb bonding mortar, putty hmoov, sab hauv thiab sab nrauv phab ntsa putty, waterproof mortar, nyias txheej pob qij txha, thiab lwm yam. ., lawv muaj kev cuam tshuam tseem ceeb ntawm kev tuav dej, dej xav tau, kev ruaj khov, kev tiv thaiv thiab kev ua haujlwm ntawm stucco system.

Hydroxypropyl methylcellulose HPMC cov khoom ua ke ua ke ntau lub cev thiab tshuaj lom neeg los ua ib yam khoom tshwj xeeb nrog ntau yam kev siv. Cov khoom sib txawv yog raws li nram no:

◆ Kev tuav dej: Nws tuaj yeem tswj cov dej noo ntawm qhov ntxeem tau xws li phab ntsa cement boards thiab cib.

◆ Zaj duab xis-forming: Nws tuaj yeem tsim cov duab pob tshab, tawv thiab muag muag nrog cov roj zoo heev.

◆ Organic Solubility: Cov khoom yog soluble nyob rau hauv ib co organic solvents, xws li ethanol / dej, propanol / dej, dichloroethane thiab ib tug hnyav system muaj li ntawm ob organic solvents.

◆ Thermal gelation: Cov tshuaj aqueous ntawm cov khoom yuav tsim ib lub gel thaum nws yog rhuab, thiab cov gel tsim yuav los ua ib tug tov dua tom qab txias.

◆ Kev ua haujlwm saum npoo: Muab cov dej ua haujlwm saum npoo hauv cov tshuaj kom ua tiav qhov xav tau emulsification thiab tiv thaiv colloid, nrog rau theem stabilization.

◆ Ncua tseg: Hydroxypropyl methylcellulose tuaj yeem tiv thaiv cov khoom ntawm qhov chaw, yog li inhibiting qhov tsim ntawm precipitates.

◆ Tiv thaiv colloid: Nws tuaj yeem tiv thaiv cov tee thiab cov khoom los ntawm coalescing lossis coagulating.

◆ Adhesiveness: Siv los ua cov nplaum rau cov xim, cov khoom luam yeeb, thiab cov khoom siv ntawv, nws muaj cov haujlwm zoo heev.

◆ Dej Solubility: Cov khoom tuaj yeem yaj hauv dej hauv ntau qhov sib txawv, thiab nws qhov siab tshaj plaws tsuas yog txwv los ntawm viscosity.

◆ Non-ionic inertness: Cov khoom 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.

◆ Tasteless thiab tsw, tsis cuam tshuam los ntawm metabolism; siv los ua zaub mov thiab tshuaj ntxiv, lawv yuav tsis raug metabolized hauv cov zaub mov, thiab yuav tsis muab cua sov.