Hydroxypropyl methylcellulose HPMC thepa

Li-cellulose ethers tse sebelisoang ka tloaelo li kenyelletsa HEC, HPMC, CMC, PAC, MHEC le tse ling tse joalo.Non-ionic water-soluble cellulose ether e na le sekhomaretsi, botsitso ba ho hasana le matla a ho boloka metsi, 'me ke tlatsetso e sebelisoang hangata bakeng sa thepa ea mohaho.HPMC, MC kapa EHEC li sebelisoa meahong e mengata e thehiloeng ho samente kapa ea gypsum, joalo ka seretse sa masonry, seretse sa samente, ho roala samente, gypsum, motsoako oa cementitious, le milky putty, joalo-joalo, e ka ntlafatsang ho senyeha ha samente kapa lehlabathe. le ho ntlafatsa haholo Adhesion, e leng ea bohlokoa haholo bakeng sa samente, samente ea lithaele le putty.HEC e sebelisoa ka samente, eseng feela e le retarder, empa hape e le moemeli oa ho boloka metsi.HEHPC e boetse e na le ts'ebeliso ena.

Lihlahisoa tsa HPMC tsa Hydroxypropyl methylcellulose li kopanya thepa e mengata ea 'mele le ea lik'hemik'hale ho etsa lihlahisoa tse ikhethang tse nang le ts'ebeliso le thepa e fapaneng:

Ho boloka metsi: E ka boloka metsi libakeng tse nang le masoba joalo ka liboto tsa samente le litene.

Ho etsa filimi: E ka etsa filimi e hlakileng, e thata le e bonolo e nang le khanyetso e ntle ea mafura.

Ho qhibiliha ha 'mele: Sehlahisoa se qhibiliha ka har'a metsoako e meng ea tlhaho, joalo ka litekanyo tse loketseng tsa ethanol/metsi, propanol/metsi, dichloroethane le sesebelisoa sa solvent se entsoeng ka metsoako e 'meli ea tlhaho.

Thermal gelation: Ha motsoako o nang le metsi oa sehlahisoa o futhumatsoa, ​​​​gel e tla theha, 'me gel e entsoeng e tla fetoha tharollo ha e pholile.

Mosebetsi oa holim'a metsi: E fana ka ts'ebetso ea holim'a metsi ka tharollo ho finyella li-emulsification tse hlokahalang le li-colloids tse sireletsang, hammoho le ho tsitsisa mohato.

Ho emisoa: Hydroxypropyl methylcellulose e thibela likaroloana tse tiileng hore li se ke tsa lula, kahoo li thibela ho thehoa ha sediments.

Protective Colloids: Thibela marotholi le likaroloana ho kopana kapa ho hoama.

Metsi a qhibilihang : Sehlahisoa se ka qhibiliha ka metsing ka bongata bo fapaneng, mahloriso a mangata a lekanyelitsoe feela ke viscosity.

Ho se be le ionic inertness: Sehlahisoa ke ether ea cellulose e seng ea ionic e sa kopaneng le letsoai la tšepe kapa li-ion tse ling ho etsa li-precipitates tse sa tsitsang.

Acid-base stability: e loketse ho sebelisoa sebakeng sa PH3.0-11.0.


Nako ea poso: Sep-22-2022