He aha nga hua o te rahi o te kakara i runga i te hydroxypropyl methylcellose:
Te whakahiato o te hydroxypropyl methylcellulose: Mahia te koranu miro mo te 35-4 c mo te hawhe haora, kia tau te tau toharite o te polymerization o roto. Whakanohia te muka Alkali ki te Kettletif ColleTif, taapiri i te Opleyle Oxide me te methyl chloride kia raupapahia te 50-80 ° C mo te 5 haora, ko te pehanga nui rawa atu. Na ka taapirihia he nui o te waikawa hydrochloric me te waikawa oxalic ki te wai wera i te 90 ° C kia horoia te rahi. Te mate i roto i te centrifuge. Horoi ki te wai tae noa ki te koretake. Ka iti ake te kiko o te makuku o te rauemi ki te 60%, maroke me te awa hau wera i te 130 ° C kia iti ake te 5% o te makuku makuku.
Ko te HPMC i hangaia e te tikanga whakarewa ka whakamahi i a Toluene me te isopropinol hei whakarewa. Mena kaore i te pai te horoi, ka mau tonu etahi hongi. I tenei wa, ko te kounga o te hydroxypropyl o te hydroxyproplulose hpmc he rereke, he rereke te rereketanga, he uaua ki te whakatau i nga kaihoko. Koinei te raru o te tukanga horoi, kaore e pa ki te whakamahi me te kore he raru, kaua te HPMC parakore e hongi i te haukini, te maaka me te waipiro; Ko te HPMC kua whakapaehia he maha nga kakara o nga kakara katoa, ahakoa he koretake, ka tino taumaha. Heoi, ko te methylcropyl methylcelose i hangaia e te maha o nga kaihanga he hongi kaha me te hongi nui. Ko te kounga kaore i te pa ki te pa.
Ko te hypromatose e whiwhi ana i te miro kua whakahekehia me te wai onge ki te tiki i te alkalinese cellulose, ka tapirihia te kaihoko a te konupora, te isopropinol, te horoi, me te horoi. Ana, ka puta he kakara, na reira ka taea e nga kaiwhakamahi te whakamahi i te maia.
Te wa tuku: Jun-09-2023