Ọdịiche dị n'etiti hydroxypropyl starch ether na cellulose ether

Ugbu a, ọtụtụ ndị amaghị ọtụtụ ihe gbasara hydroxypropyl starch ether. Ha na-eche na e nwere ntakịrị ihe dị iche n'etiti hydroxypropyl starch ether na nkịtị starch, ma ọ bụghị. Ọnụ ọgụgụ nke hydroxypropyl starch ether eji eme ihe na ngwa ngwa dị ntakịrị, na mgbakwunye nke polar nwere ike nweta mmetụta dị mma.

Hydroxypropyl starch ether (HPS) bụ ntụ ntụ na-acha ọcha nke enwetara site n'ịgbanwe ihe ọkụkụ sitere n'okike, na-ekpochapụ nke ukwuu, wee fesaa ya, na-enweghị ndị na-emepụta plastik. Ọ dị nnọọ iche na starch nkịtị ma ọ bụ starch gbanwetụrụ.

Na hydroxypropyl methyl cellulose, makwaara dị ka hypromellose, hydroxypropyl methyl red vitamin ether, bụ iji ukwuu dị ọcha owu cellulose dị ka akụrụngwa, na-emeso ya na lye na 35-40 Celsius C maka ọkara otu awa, afanyekwa, na-egweri cellulose, na afọ nke ọma na 35 ° C, nke mere na nkezi ogo nke polymerization eriri na-enwetara n'ime nkezi nke alkali fiber nso na-enwetara n'ime alkali eriri. Tinye eriri alkali n'ime kettle etherification, gbakwunye propylene oxide na methyl chloride n'usoro, wee gbanye ya na 50-80 ° C maka awa 5, na nrụgide kachasị bụ ihe dịka 1.8MPa. Mgbe ahụ tinye ihe kwesịrị ekwesị nke hydrochloric acid na oxalic acid na mmiri ọkụ na 90 Celsius C iji sachaa ihe ahụ iji gbasaa olu, wee kpochaa ya na centrifuge, n'ikpeazụkwa na-asachapụ ya ugboro ugboro na nnọpụiche. A na-eji ya eme ihe na-ewu ụlọ, ụlọ ọrụ kemịkalụ, agba, ọgwụ, ụlọ ọrụ ndị agha na mpaghara ndị ọzọ, dịka onye na-emepụta ihe nkiri, ihe nkedo, dispersant, stabilizer, thickener, wdg.

Enwere ike iji hydroxypropyl starch ether dị ka ihe mgbakwunye maka ngwaahịa simenti, ngwaahịa gypsum na ngwaahịa calcium lime. Ọ nwere ezigbo ndakọrịta na ihe mgbakwunye ụlọ ndị ọzọ. Eji ya na hydroxypropyl methylcellulose ether HPMC, ọ nwere ike ibelata usoro onunu ogwu nke hydroxypropyl methylcellulose (n'ozuzu na-agbakwunye 0.05% nke HPS nwere ike belata onunu ogwu nke HPMC banyere 20% -30%)), na ike na-egwu a ndim mmetụta , na-akwalite esịtidem Ọdịdị, na mma mgbape eguzogide na mma workability.