Hydroxypropyl methylcellulose (HPMC), tseem hu ua hydroxypropyl methylcellulose, yog ib qho tsis yog - ionic cellulose ether tau los ntawm chemically modifying natural cellulose. Nws zoo nkaus li dawb los yog tawm -dawb fibrous lossis granular hmoov, thiab feem ntau yog muab faib ua qib xws li 1828, 2208, 2906, thiab 2910 raws li cov ntsiab lus ntawm methoxy thiab hydroxypropoxy hloov pauv.
Cov khoom no swells nyob rau hauv dej txias los ua ib tug ntshiab los yog me ntsis cloudy colloidal tov, nthuav tawm thickening, zaj duab xis - sib sau, dej- tuav, thiab binding zog, thiab yog chemically ruaj khov. HPMC muaj ntau yam kev siv. Hauv kev lag luam kws tshuaj, nws feem ntau yog siv los ua ib qho kev sib khi, tsis sib xws, txhawb nqa - tso tawm cov ntaub ntawv matrix rau cov ntsiav tshuaj, thiab cov khoom siv tshuaj ntsiav; hauv kev lag luam khoom noj khoom haus, nws yog siv los ua cov thickener thiab stabilizer; hauv kev lag luam khoom siv hauv tsev, nws yog ib qho tseem ceeb ntawm cov dej- khaws cia thiab thickening tus neeg sawv cev; thiab nws kuj tseem siv rau hauv cov tshuaj pleev ib ce, cov khoom siv tu tus kheej, thiab coatings, ntawm lwm yam lag luam.
