I aso nei, e toʻatele tagata e le iloa tele e uiga i le hydroxypropyl starch ether. Latou te manatu e itiiti se eseesega i le va o le hydroxypropyl starch ether ma le masoa masani, ae e leai. Hydroxypropyl starch ether o loʻo faʻaaogaina i se vaega itiiti i oloa sima, ma o le aofaʻi faʻaopoopo o le polar region e mafai ona maua ai aʻafiaga lelei.
Hydroxypropyl starch ether (HPS) o se paʻepaʻe paʻepaʻe paʻepaʻe e maua mai i laʻau faʻanatura e pei o mea mataʻutia, faʻaleleia, faʻamalosia maualuga, ona faʻamamago lea, e aunoa ma ni mea faʻapipiʻi. E matua ese lava mai le masoa masani poʻo le masoa suia
Hydroxypropyl methyl cellulose, e lauiloa foi o le hypromellose ma le hydroxypropyl methyl red vitamin ether, e faia i le cellulose sili ona mama o le cotton e pei o mea mata, togafitia i le lye i le 35-40 ° C mo le afa itula, oomi, o le cellulose ua pala, ma matua talafeagai. i le 35 ° C, ina ia o le averesi tikeri o polymerization o le alava alkali maua i totonu o le tulaga manaomia. Tuu le alava alkali i totonu o le ulo etherification, faaopoopo le propylene oxide ma le methyl chloride i le faasologa, etherify i le 50-80 ° C mo le 5 itula, ma le maualuga o le mamafa e tusa ma le 1.8MPa. Ona faaopoopo lea o se aofaiga talafeagai o le hydrochloric acid ma le oxalic acid i le vai vevela i le 90 ° C e fufulu ai mea e faʻalautele ai le voluma, ona faʻamama ai lea i se centrifuge, ma mulimuli ane fufulu faʻaauau i le le mautonu. Faʻaaogaina lautele i le fausiaina, vailaʻau vailaʻau, vali, vailaʻau, alamanuia militeri ma isi faʻalapotopotoga, taʻitasi e fai ma sui fai ata tifaga, fusi, faʻasalalau, stabilizer, mafiafia, ma isi.
Hydroxypropyl starch ether e mafai ona fa'aogaina e fai ma fa'afefiloi mo oloa fa'avae sima, oloa fa'avae gypsum ma oloa calcium lime. E lelei le fetaui ma isi mea fa'afefiloi fale. Faʻaaogaina faʻatasi ma le hydroxypropyl methylcellulose eter HPMC, e mafai ona faʻaititia le fua o le hydroxypropyl methylcellulose (e masani ona faʻaopoopo le 0.05% o le HPS e mafai ona faʻaititia le vailaʻau o le HPMC e tusa ma le 20% -30%), ma e mafai ona faia se vaega mafiafia. Fa'alauiloa le fausaga i totonu, sili atu le tete'e ma fa'aleleia galuega.
Taimi meli: Apr-13-2023