Hona joale batho ba bangata ha ba tsebe haholo ka hydroxypropyl starch ether.Ba nahana hore ho na le phapang e nyenyane pakeng tsa hydroxypropyl starch ether le starch e tloaelehileng, empa ha ho joalo.Palo ea hydroxypropyl starch ether e sebelisoang lihlahisoa tsa seretse e nyane haholo, 'me palo e ekelitsoeng ea polar e ka fihlela litlamorao tse ntle tsa boleng.
Hydroxypropyl starch ether (HPS) ke phofo e tšoeu e ntle e fumanoang ka ho fetola limela tsa tlhaho, tse nang le etherified haholo, ebe li omisitsoe, ntle le li-plasticizers.E fapane ka ho feletseng le starch e tloaelehileng kapa starch e fetotsoeng.
'Me hydroxypropyl methyl cellulose, eo hape e tsejoang e le hypromellose, hydroxypropyl methyl red vitamin ether, ke ho sebelisa cellulose e hloekileng haholo ea k'hothone e le thepa e tala, le ho e tšoara ka lye ka 35-40 ° C ka halofo ea hora, Squeeze, sila selulose, le lilemo hantle ho 35 ° C, e le hore tekanyo e tloaelehileng ea polymerization ea fiber e fumanoeng ea alkali e ka har'a mefuta e hlokahalang.Kenya fiber ea alkali ka har'a kettle ea etherification, eketsa propylene oxide le methyl chloride ka tatellano, 'me u e felise ho 50-80 ° C ka lihora tse 5,' me khatello e phahameng e ka ba 1.8MPa.Ebe u eketsa tekanyo e loketseng ea hydrochloric acid le oxalic acid ho metsi a chesang a 90 ° C ho hlatsoa thepa ho atolosa molumo, ebe o e senya ka centrifuge, 'me qetellong ue hlatsoe khafetsa ho se nke lehlakore.E sebelisoa haholo kahong, indasteri ea lik'hemik'hale, pente, meriana, indasteri ea sesole le masimo a mang, ka ho latellana e le moemeli oa ho etsa lifilimi, binder, dispersant, stabilizer, thickener, joalo-joalo.
Hydroxypropyl starch ether e ka sebelisoa e le motsoako oa lihlahisoa tse thehiloeng ho samente, lihlahisoa tse thehiloeng ho gypsum le lihlahisoa tsa lime calcium.E lumellana hantle le li-admixtures tse ling tsa moaho.E sebelisoa hammoho le hydroxypropyl methylcellulose ether HPMC, e ka fokotsa litekanyetso tsa hydroxypropyl methylcellulose (ka kakaretso ho eketsa 0.05% ea HPS ho ka fokotsa tekanyo ea HPMC ka hoo e ka bang 20% -30%), 'me e ka bapala phello e teteaneng, ho khothaletsa ka hare. sebopeho, se nang le khanyetso e ntle ea crack le ts'ebetso e ntlafalitsoeng.
Nako ea poso: Apr-24-2023