Tam sim no muaj ntau tus neeg tsis paub ntau txog hydroxypropyl starch ether. Lawv xav tias muaj qhov sib txawv me ntsis ntawm hydroxypropyl starch ether thiab cov starch ib txwm muaj, tab sis nws tsis yog. Tus nqi ntawm hydroxypropyl starch ether siv rau hauv cov khoom siv mortar yog me me heev, thiab qhov ntxiv ntawm polar tuaj yeem ua tiav cov txiaj ntsig zoo.
Hydroxypropyl starch ether (HPS) yog hmoov dawb zoo uas tau los ntawm kev hloov kho cov nroj tsuag ntuj, etherified heev, thiab tom qab ntawd tsuag-qhuav, tsis muaj plasticizers. Nws txawv kiag li ntawm cov starch ib txwm lossis cov starch hloov kho.
Thiab hydroxypropyl methyl cellulose, tseem hu ua hypromellose, hydroxypropyl methyl liab vitamin ether, yog siv cov paj rwb cellulose ntshiab heev ua cov khoom siv raw, thiab kho nws nrog lye ntawm 35-40 ° C rau ib nrab teev, Nyem, tsoo cov cellulose, thiab hnub nyoog kom zoo ntawm 35 ° C, yog li qhov nruab nrab ntawm polymerization ntawm cov alkali fiber tau txais yog nyob rau hauv qhov xav tau. Muab cov alkali fiber rau hauv lub lauj kaub etherification, ntxiv propylene oxide thiab methyl chloride ua ntu zus, thiab etherify nws ntawm 50-80 ° C rau 5 teev, thiab qhov siab tshaj plaws yog li 1.8MPa. Tom qab ntawd ntxiv cov hydrochloric acid thiab oxalic acid rau hauv dej kub ntawm 90 ° C kom ntxuav cov khoom kom nthuav qhov ntim, tom qab ntawd dehydrate nws nrog lub centrifuge, thiab thaum kawg ntxuav nws rov qab mus rau neutrality. Siv dav hauv kev tsim kho, kev lag luam tshuaj lom neeg, xim, tshuaj, kev lag luam tub rog thiab lwm yam teb, raws li tus neeg sawv cev ua yeeb yaj kiab, binder, dispersant, stabilizer, thickener, thiab lwm yam.
Hydroxypropyl hmoov txhuv nplej siab ether siv tau ua cov khoom sib xyaw rau cov khoom siv cement, cov khoom siv gypsum thiab cov khoom siv lime calcium. Nws muaj kev sib raug zoo nrog lwm cov khoom siv hauv tsev. Siv ua ke nrog hydroxypropyl methylcellulose ether HPMC, nws tuaj yeem txo qhov koob tshuaj ntawm hydroxypropyl methylcellulose (feem ntau ntxiv 0.05% ntawm HPS tuaj yeem txo qhov koob tshuaj ntawm HPMC los ntawm kwv yees li 20% -30%)), thiab tuaj yeem ua rau cov nyhuv tuab, los txhawb cov qauv sab hauv, nrog kev tiv thaiv kev tawg zoo dua thiab kev ua haujlwm zoo dua.
Lub sijhawm tshaj tawm: Plaub Hlis-24-2023