Hydroxypropyl bylule (hypromellose plulue (hypromellose) waa cad cad oo ah budada celyadaha cad ama pellet ee leh astaamaha biyo qabow oo biyo kulul oo la mid ah cellulose. Kooxda hydroxypropyl group iyo methyl kooxda 'methyl group' waa ether depet iyo unugyada gulukooska gulukooska ee isku-dhafka ah ee isku-darka, waa unugyada unugyada ion-in-ka ee ether ah. Waa semi-sen-symi-syrithetic, firfircoon, poly poly peymyr caadi ah oo caadi ahaan loo isticmaalo infthalmology sida saliidaha ama ka-sarreyn ama ka-sarreynta daroogada afka ah
Diyaarinta
Waraaqda waraaqda ee Kraft ee leh α-cellulose waxa ku jira 97%, dib-u-fiirinta 720ml / g iyo dhererka fiber-ka ah ee 2.6mm ayaa lagu xalliyay 49% xalka NAH ee 40 ℃ 50 ilbiriqsi. Plasp-ka ka dhalanaya ayaa markaa loo soo saaray si meesha looga saaro wixii ka badan 49% Nabiga aquoh xalka si loo helo unugyada alkali. Saamiga miisaanka ee (49% Nabiga ee biyaha) ilaa (Qeybta adag ee saxarada) ee timaha galka ah waxay ahayd 200. Qiyaasta alkali (20kg) (20kg) (20kg) ayaa la geliyay jaceyrta cadaadiska kulul oo leh caqabad gudaha ah ka dibna u fiicantahay oo lagu nadiifiyo gaaska nitrogen si ay si ku filan uga saaraan oksijiinta ka soo baxa falcelinta. Kadib, heerkulka ku yimid ka-faa'iideysiga waxaa lagu xakameeyay 60 ℃, halka caqabadaha gudaha la sameeyay. Kadib, 2.4kg oo Dimthyl Ether ah ayaa lagu daray oo heerkulka ku jira ayaa lagu xakameeyay si loo ilaaliyo 60 ° C. Marka lagu daro chloride-ka aasaasiga ah ee (propylenenene chloride) ee (pretylene chloride) oo ah (propylene oxide) si (waaxaha adag) 1.97, iyo heerkulka ku-soo-celinta waxaa lagu xakameeyay 60 ° C illaa 80 ° C. Intaa waxaa dheer ee Chloromethane iyo Propyleneter-ka, ku-soo-celinta waxaa lagu xukumay 80 ℃ ilaa 90 ℃. Intaas waxaa sii dheer, falcelinta waxaa lagu hayaa 90 ° C 20 daqiiqo. Markaa, gaaska waa laga soo saaray ka-faa'iideysiga, iyo ceyriinka hydroxypropyl methyl bylulose waxaa laga saaraa jawaabta. Heerkulka ceyriinka hydroxypropylkyl methylcelrelose wuxuu ahaa 62 ℃ markii laga saaray. Cabbir isugeynta 50% cabirka walxaha ee isku-darka tirada isugeynta cabirka ee loo qaybiyay iyadoo lagu saleynayo saamiga ceyriska ceyriska ah ee methylcellcellose ka gudbaya furitaanka shaashadda shaashadda oo ka gudbaya shanta shaashadda, mid walbana leh cabbir furan. Natiijo ahaan, celcelis ahaan cabirka walxaha walxaha qalafsan ee walxaha adag waa 6.2mm. The cryroxypropylpylpellellase methylcelrellose waxaa lagu soo rogay biaxial tranealed joogto ah (KRC KNAAER S1, L / D = 10.2 L / d = 10.2 LR. Sida lagu cabiray si la mid ah iyadoo la adeegsanayo shan shaashad oo leh cabbirro kaladuwan oo kala duwan, celcelis ahaan cabirka walxaha ayaa ahaa 1.4mm. Slurry waxaa lagu helay isagoo ku daraya biyo kulul 80 ° C dhajinta ceyriska hyroxypropyl chopylrcellerose methykellerose methykellerose methylcellosure) ilaa (wadarta tirada slurry) waxaa loo beddelay 0.1. Slantry wuxuu ku kiciyay heerkul joogto ah oo ah 80 ° C muddo 60 daqiiqo ah. Kadib, slurry-ka waxaa lasiiyaa shaandhada cadaadiska cadaadiska ee wareegga (BHS shothofen) oo leh xawaare wareeg ah oo ah 0.5 rpm oo la kululeeyo. Heerkulka slurry wuxuu ahaa 93 ℃. Slurry waxaa keena bam-gacmeedka oo leh cadaadis siiya oo ah 0.2mpa. Cabbirka furitaanka shaandhada cadaadiska ee wareegga ayaa ah 80μm, iyo aagga marinka ayaa ah 0.12m2. Slurry la keenay shaandhada cadaadiska rogida waxaa lagu sifeeyaa shaandhada loona beddelo shaashadda shaandhada. Keega keenta ayaa lagu quudiyey Steam of 0.3mpa iyo biyo kulul 95 ° C si miisaan culeys ah oo ah 10.0 illaa qaybta adag ee lagu maydhay byroxypropyl ka dibna lagu buuxiyo shaandhada. Biyaha kulul waxaa keena bam-gacmeed leh cadaadis siiya oo ah 0.2mpa. Ka dib markii biyaha kulul la siiyaa, 0.3mpa oo ah Steam ayaa lasiiyaa. Wax soo saarka lagu maydhay dusha sare ee shaandhada ayaa markaa laga saarayaa xoqidda oo laga soo saaray wasakhda. Tallaabooyin isdaba joog ah oo ka socda sahayda sturry si dheecaanka wax soo saarka la maydhay. Waxyaabaha biyaha ah ee wax soo saarka la maydhay waxay ahayd 52.8% sida lagu cabiro kuleylka hygerometer-ka qalalan. Alaabada la maydhay ayaa laga soo saaray shaandhada cadaadiska ee Rothiy-ga ayaa la qalajiyey iyadoo la adeegsanayo hawo-mareenka hawada 80 ° C oo lagu jajabiyey saameynta Mill Gall si ay u helaan hydroxypropyl methylcellosuse.
isticmaal
Alaabtaani waxaa loo isticmaalaa sidii wakiilka qaro weyn, kala firidhsan, xayiraad, emulsififier wuxuuna ku nasiyaa warshadaha dharka. Sidoo kale si ballaaran loogu isticmaalo resin isku-darka, patroochemical, dhoobada, waraaqda, maqaarka, dawada, cuntada, waxyaabaha la isku qurxiyo iyo warshadaha kale.
Waqtiga Post: Feb-20-2025