Nigute impumuro ya hydroxypropyl methylcellulose igira ingaruka kumiterere?

Ni izihe ngaruka z'ubunini bw'impumuro kuri hydroxypropyl methylcellulose:

Synthesis yahydroxypropyl methylcellulose. Shira fibre ya alkali mumasafuriya ya etherification, ongeramo okiside ya propylene na methyl chloride ikurikiranye, hanyuma etherify kuri 50-80 ° C mumasaha 5, umuvuduko ntarengwa ni 1.8MPa. Noneho shyiramo urugero rukwiye rwa acide hydrochloric na aside oxyde mumazi ashyushye kuri 90 ° C kugirango ukarabe ibikoresho kugirango wagure amajwi. Umwuma muri centrifuge. Karaba n'amazi kugeza utabogamye. Iyo ubuhehere bwibintu biri munsi ya 60%, byumisha numuyaga ushyushye kuri 130 ° C kugeza igihe amazi ari munsi ya 5%.

HPMC yakozwe nuburyo bwo gukemura ikoresha toluene na isopropanol nkibishishwa. Niba gukaraba atari byiza, impumuro mbi izagumaho. Kugeza ubu, ubwiza bwa hydroxypropyl methylcellulose HPMC buratandukanye cyane, kandi igiciro kiratandukanye cyane, bigatuma abakiriya bahitamo neza. Iki nikibazo cyo gukaraba, ntabwo bigira ingaruka kumikoreshereze kandi ntakibazo gihari, HPMC yera ntigomba kunuka ammonia, krahisi n'inzoga; BasambanijweHPMCirashobora guhumurirwa muburyo bwose, niyo yaba itaryoshye, izumva iremereye. Nyamara, hydroxypropyl methylcellulose yakozwe nababikora benshi ifite impumuro ikomeye cyane numunuko ukabije. Ubwiza rwose ntabwo bugera kurwego.

Hypromellose iboneka mugutera inda itunganijwe hamwe namazi adasanzwe kugirango ubone selile ya alkaline, hanyuma wongereho solvent, etherification agent, toluene, na isopropanol kugirango reaction ya etherification, itabuza gukaraba, kumisha, kumenagura, nibindi kugirango ubone ibicuruzwa byarangiye. Nibyiza, hazaba umunuko, abayikoresha rero barashobora kuyikoresha bafite ikizere.