Maadaama sifooyinka hydroxypropyl methylcellulose ay la mid yihiin ether-yada kale ee biyaha ku milma, waxaa loo isticmaali karaa dahaarka emulsion-ka iyo qaybaha dahaarka resin-ka ee biyaha ku milma sida wakiilka sameeya filimka, dhumuc-saare, emulsifier iyo xasiliye, iwm., kaas oo siinaya filimka dahaarka iska caabin wanaagsan oo xoqid ah. Dahaarka iyo isku-dhejinta isku-dhafan, iyo hagaajinta xiisadda dusha sare, xasilloonida asiidhyada iyo saldhigyada, iyo iswaafajinta midabada birta.
Maadaama HPMC ay leedahay dhibic jel oo ka sarreysa MC, waxay sidoo kale u adkeysan kartaa weerarka bakteeriyada marka loo eego ether-yada kale ee cellulose, sidaas darteedna waxaa loo isticmaali karaa sidii wakiil dhumuc leh oo loogu talagalay dahaarka emulsion-ka biyaha. HPMC waxay leedahay xasillooni kaydin oo wanaagsan iyo kala firdhis heer sare ah, sidaas darteed HPMC waxay si gaar ah ugu habboon tahay kala firdhiye ahaan dahaarka emulsion-ka.
Adeegsiga hydroxypropyl methyl cellulose warshadaha dahaarka waa sida soo socota.
1. viscosity kala duwan oo ah qaabaynta rinjiga HPMC iska caabbinta xirashada, iska caabbinta heerkulka sare, sharraxaadda ka hortagga bakteeriyada, iska caabbinta dhaqidda iyo xasilloonida asiidhyada iyo saldhigyada ayaa ka wanaagsan; waxaa sidoo kale loo isticmaali karaa sidii xoqe rinji oo ka kooban methanol, ethanol, propanol, isopropyl alcohol, ethylene glycol, acetone, methyl ethyl ketone ama dhumuciyaha alkolada diketone; dahaarka emulsified ee HPMC ee la sameeyay ayaa leh xoqid qoyan oo aad u fiican; HPMC marka loo eego HEC iyo EHEC iyo CMC maadaama HPMC ay leedahay saameyn ka wanaagsan HEC iyo EHEC iyo CMC sida dhumuciyaha rinjiga.
2. hydroxypropyl methyl cellulose oo si weyn loo beddelay wuxuu leeyahay iska caabin ka wanaagsan weerarka bakteeriyada marka loo eego beddelka hooseeya, wuxuuna leeyahay xasillooni ka wanaagsan viscosity ee dhumucda polyvinyl acetate. Ethers-ka kale ee cellulose waxay ku jiraan kayd sababtoo ah burburka silsiladda ee cellulose ether waxayna ka dhigayaan viscosity-ga dahaarka inuu yaraado.
3. Rinji-jaraha wuxuu noqon karaa HPMC-ga biyaha ku milma (halkaas oo methoxy uu yahay 28% ilaa 32%, hydroxypropoxy waa 7% ilaa 12%), dioxymethane, toluene, paraffin, ethanol, qaabaynta methanol, waxaa lagu dabaqi doonaa dusha sare ee toosan, iyadoo la raacayo dheellitirka loo baahan yahay iyo isbeddelka. Rinji-jarahan wuxuu ka saaraa inta badan rinjiyada buufinta caadiga ah, varnishes, enamel, iyo qaar ka mid ah epoxy esters, epoxy amides, catalyzed epoxy amides, acrylates, iwm. Rinjiyo badan ayaa laga furi karaa dhowr ilbiriqsi gudahood, rinjiyada qaar waxay u baahan yihiin 10 ~ 15 daqiiqo ama ka badan, rinji-jarahan wuxuu si gaar ah ugu habboon yahay dusha sare ee alwaaxa.
4. Rinjiga emulsion-ka biyaha waxaa ka koobnaan kara 100 qaybood oo ah midab aan dabiici ahayn ama midab dabiici ah, 0.5 ~ 20 qaybood oo ah cellulose alkyl ama hydroxyalkyl cellulose oo biyo ku milma iyo 0.01 ~ 5 qaybood oo ah polyoxyethylene ether ama ester ester. Tusaale ahaan, midabka waxaa lagu helaa isku darka 1.5 qaybood oo HPMC ah, 0.05 qaybood oo ah polyethylene glycol alkyl phenyl ether, 99.7 qaybood oo ah titanium dioxide iyo 0.3 qaybood oo ah madow kaarboon. Isku darka waxaa markaa lagu walaaqayaa 100 qaybood oo ah 50% polyvinyl acetate adag si loo helo dahaarka, mana jiro wax farqi ah oo u dhexeeya filimka dahaarka qalalan ee lagu sameeyay warqad qaro weyn oo si khafiif ah loogu xoqo burush.
Waqtiga boostada: Maajo-20-2022