Niaj hnub no, 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 hmoov txhuv nplej siab, tab sis nws tsis yog. Hydroxypropyl starch ether yog siv nyob rau hauv ib tug me me nyob rau hauv mortar cov khoom, thiab cov ntxiv npaum li cas ntawm cov polar cheeb tsam yuav ua tau zoo zoo.
Hydroxypropyl starch ether (HPS) yog cov hmoov zoo dawb tau los ntawm cov nroj tsuag ntuj tsim cov khoom siv raw, hloov kho, muaj etherified, thiab tom qab ntawd tshuaj tsuag qhuav, tsis muaj plasticizers. Nws txawv kiag li ntawm cov hmoov txhuv nplej siab zoo tib yam los yog hloov cov hmoov txhuv nplej siab
Hydroxypropyl methyl cellulose, tseem hu ua hypromellose thiab hydroxypropyl methyl liab vitamin ether, yog ua los ntawm cov paj rwb ntshiab heev cellulose li raw khoom, kho nrog lye ntawm 35-40 ° C rau ib nrab ib teev, squeezed, lub cellulose pulverized, thiab hnub nyoog tsim nyog. ntawm 35 ° C, yog li ntawd qhov nruab nrab degree ntawm polymerization ntawm cov alkali fiber ntau tau nyob rau hauv qhov yuav tsum tau muaj. Muab cov alkali fiber ntau tso rau hauv etherification kettle, ntxiv propylene oxide thiab methyl chloride ua ntu zus, etherify ntawm 50-80 ° C rau 5 teev, thiab qhov siab tshaj plaws yog li 1.8MPa. Tom qab ntawd ntxiv qhov tsim nyog ntawm hydrochloric acid thiab oxalic acid rau hauv dej kub ntawm 90 ° C los ntxuav cov khoom kom nthuav dav, tom qab ntawd dehydrate nws nrog lub centrifuge, thiab thaum kawg ntxuav nws rov qab mus rau qhov nruab nrab. Siv dav hauv kev tsim kho, tshuaj lom neeg kev lag luam, xim, tshuaj, tub rog kev lag luam thiab lwm yam kev lag luam, raws li tus neeg sawv cev ua yeeb yaj kiab, binder, dispersant, stabilizer, thickener, thiab lwm yam.
Hydroxypropyl starch ether tuaj yeem siv los ua cov khoom sib xyaw rau cov khoom siv cement, cov khoom siv gypsum thiab cov khoom siv calcium calcium. Nws muaj zoo compatibility nrog rau lwm lub tsev admixtures. Siv ua ke nrog hydroxypropyl methylcellulose ether HPMC, nws tuaj yeem txo qhov ntau npaum ntawm hydroxypropyl methylcellulose (feem ntau ntxiv 0.05% ntawm HPS tuaj yeem txo cov tshuaj HPMC li ntawm 20% -30%), thiab tuaj yeem ua lub luag haujlwm thickening. Txhawb cov qauv sab hauv, zoo dua tawg tiv thaiv thiab txhim kho kev ua haujlwm.
Post lub sij hawm: Apr-13-2023