Ngoku abantu abaninzi abazi nto ingako nge-hydroxypropyl starch ether. Bacinga ukuba akukho mahluko mkhulu phakathi kwe-hydroxypropyl starch ether kunye ne-starch eqhelekileyo, kodwa akunjalo. Ubungakanani be-hydroxypropyl starch ether esetyenziswa kwiimveliso ze-mortar buncinci kakhulu, kwaye ubuninzi bokongeza be-polar bunokufezekisa iziphumo ezilungileyo.
I-Hydroxypropyl starch ether (HPS) yipowder emhlophe ecolekileyo efunyanwa ngokutshintsha izityalo zendalo, itshiswe kakhulu, ize yomiswe nge-spray, ngaphandle kwe-plasticizers. Yahluke ngokupheleleyo kwi-starch eqhelekileyo okanye i-starch eguquliweyo.
Kwaye i-hydroxypropyl methyl cellulose, eyaziwa ngokuba yi-hypromellose, i-hydroxypropyl methyl red vitamin ether, ifanele ukusebenzisa i-cotton cellulose ecocekileyo kakhulu njengezinto eziluhlaza, kwaye iyiphathe nge-lye kwi-35-40 ° C kangangesiqingatha seyure. Cinezela, uyityumze i-cellulose, kwaye uyivundise ngokufanelekileyo kwi-35 ° C, ukuze iqondo eliqhelekileyo le-polymerization ye-alkali fiber efunyenweyo libe ngaphakathi koluhlu olufunekayo. Faka i-alkali fiber kwi-kettle ye-etherification, yongeza i-propylene oxide kunye ne-methyl chloride ngokulandelelana, kwaye uyitshise kwi-50-80 ° C iiyure ezi-5, kwaye uxinzelelo oluphezulu lumalunga ne-1.8MPa. Emva koko yongeza isixa esifanelekileyo se-hydrochloric acid kunye ne-oxalic acid emanzini ashushu kwi-90 ° C ukuhlamba izinto ukuze zandise umthamo, uze uzisuse nge-centrifuge, kwaye ekugqibeleni uzihlambe ngokuphindaphindiweyo ukuze zingabi nanto. Isetyenziswa kakhulu kulwakhiwo, kushishino lweekhemikhali, kupende, kumayeza, kushishino lomkhosi nakwezinye iindawo, ngokulandelelana njengearhente yokwenza ifilimu, i-binder, i-dispersant, i-stabilizer, i-thickener, njl.
I-Hydroxypropyl starch ether ingasetyenziswa njengomxube weemveliso ezisekwe kwisamente, iimveliso ezisekwe kwi-gypsum kunye neemveliso ze-calcium yelayimu. Ihambelana kakuhle nezinye izinto ezidityanisiweyo zokwakha. Xa isetyenziswa kunye ne-hydroxypropyl methylcellulose ether HPMC, inokunciphisa umthamo we-hydroxypropyl methylcellulose (ngokongeza i-0.05% ye-HPS kunokunciphisa umthamo we-HPMC malunga ne-20%-30%), kwaye inokudlala isiphumo sokutyeba, ukukhuthaza ulwakhiwo lwangaphakathi, ngokumelana okungcono kokuqhekeka kunye nokusebenza okuphuculweyo.
Ixesha lokuthumela: Epreli-24-2023