O le taimi nei, e toʻatele tagata e le o iloa tele e uiga i le hydroxypropyl starch ether. Latou te manatu e laʻititi lava se eseesega i le va o le hydroxypropyl starch ether ma le starch masani, ae leai. O le aofaʻi o le hydroxypropyl starch ether e faʻaaogaina i oloa sima e matua laʻititi lava, ma o le aofaʻi o le polar e faʻaopoopoina e mafai ona ausia ai ni taunuuga lelei.
O le Hydroxypropyl starch ether (HPS) o se pauta paʻepaʻe manifinifi e maua mai i le faʻaleleia o laʻau masani, faʻamaʻaina i le ether maualuga, ona faʻamamago lea i le vai, e aunoa ma ni mea e faʻapipiʻi ai le plasticizer. E matuā ese lava mai le starch masani poʻo le modified starch.
Ma le hydroxypropyl methyl cellulose, e taʻua foʻi o le hypromellose, hydroxypropyl methyl red vitamin ether, o le faʻaaogaina lea o le cotton cellulose mama tele e fai ma mea mata, ma togafitia i le lye i le 35-40 ° C mo le afa itula, Oomi, tuʻimomomo le cellulose, ma matua lelei i le 35 ° C, ina ia oʻo i le averesi o le polymerization o le alkali fiber ua maua i totonu o le tulaga manaʻomia. Tuʻu le alkali fiber i totonu o le etherification kettle, faʻaopopo le propylene oxide ma le methyl chloride i le faasologa, ma etherify i le 50-80 ° C mo le 5 itula, ma o le maualuga o le mamafa e tusa ma le 1.8MPa. Ona faʻaopopo lea o se aofaʻiga talafeagai o le hydrochloric acid ma le oxalic acid i le vai vevela i le 90 ° C e fufulu ai le mea e faʻalautele ai le voluma, ona faʻamago lea i se centrifuge, ma mulimuli ane fufulu soo i le neutrality. E faʻaaogaina lautele i le fausiaina, alamanuia vailaʻau, vali, vailaʻau, alamanuia militeri ma isi vaega, e pei o se mea e fausia ai ata tifaga, mea e pipii ai, faʻasalalauina, faʻamautu, faʻamālosi, ma isi.
E mafai ona fa'aaogaina le hydroxypropyl starch ether e fai ma mea fa'aopoopo mo oloa faufale e fa'avae i le sima, oloa fa'avae i le gypsum ma oloa lime calcium. E fetaui lelei ma isi mea fa'aopoopo mo fale. A fa'aaogaina fa'atasi ma le hydroxypropyl methylcellulose ether HPMC, e mafai ona fa'aitiitia ai le fua o le hydroxypropyl methylcellulose (e masani ona fa'aopoopoina le 0.05% o le HPS e mafai ona fa'aitiitia ai le fua o le HPMC e tusa ma le 20%-30%)), ma e mafai ona fa'afiafiaina ai le fausaga i totonu, ma fa'aleleia atili ai le tete'e atu i le māvaevae ma fa'aleleia atili ai le faigofie ona galue.
Taimi na lafoina ai: Aperila-24-2023