Mazuvano, vanhu vazhinji havazivi zvakawanda nezve hydroxypropyl starch ether. Vanofunga kuti pane musiyano mudiki pakati pehydroxypropyl starch ether neyakajairika starch, asi handizvo. Hydroxypropyl starch ether inoshandiswa mudiki mune zvigadzirwa zvedhaka, uye iyo yakawedzerwa huwandu hwenzvimbo yepolar inogona kuwana yakanaka mhando mhedzisiro.
Hydroxypropyl starch ether (HPS) ihupfu chena hwakatsetseka hunowanikwa kubva muzvirimwa zvechisikigo semidziyo, yakagadziridzwa, yakanyungudika, uye yobva yapfapfaidzwa, isina mapurasitiki. Yakasiyana zvachose kubva kune yakajairwa starch kana yakagadziridzwa starch
Hydroxypropyl methyl cellulose, inozivikanwawo se hypromellose uye hydroxypropyl methyl red vitamin ether, yakagadzirwa nedonje cellulose yakachena seyakagadzirwa, inobatwa nelye pa 35-40 ° C kwehafu yeawa, yakasvinwa, cellulose inoputswa, uye zera zvakafanira. pa 35 ° C, kuitira kuti avhareji yedhigirii yepolymerization yeakawanikwa alkali fiber iri mukati mekudiwa. Isa iyo alkali fiber mu kettle ye etherification, wedzera propylene oxide uye methyl chloride munhevedzano, etherify pa50-80 ° C kwemaawa mashanu, uye yakanyanya kudzvanywa inosvika 1.8MPa. Zvadaro wobva wawedzera huwandu hwakakodzera hwehydrochloric acid uye oxalic acid kumvura inopisa pa 90 ° C kuti usuke zvinhu kuti uwedzere vhoriyamu, wozoibvisa ne centrifuge, uye pakupedzisira uigeze kakawanda kuti isarerekera. Inoshandiswa zvakanyanya mukuvaka, indasitiri yemakemikari, pendi, mushonga, indasitiri yemauto uye mamwe minda, zvichiteerana semugadziri wemufirimu, binder, dispersant, stabilizer, thickener, nezvimwe.
Hydroxypropyl starch ether inogona kushandiswa semusanganiswa wesimende-based zvigadzirwa, gypsum-based zvigadzirwa uye lime calcium zvigadzirwa. Iine kugarisana kwakanaka nemamwe masanganiswa ekuvaka. Inoshandiswa pamwe chete nehydroxypropyl methylcellulose ether HPMC, inogona kuderedza kuyerwa kwehydroxypropyl methylcellulose (kazhinji kuwedzera 0.05% yeHPS kunogona kuderedza dosi yeHPMC ne20% -30%), uye inogona kuita basa rekukora. Inosimudzira chimiro chemukati, zvirinani kutsemuka kuramba uye nekuvandudza kushanda.
Nguva yekutumira: Kubvumbi-13-2023