Redispersible polymer hmoov (RDP)yog ib qho hmoov nplej ua los ntawm ziab polymer emulsion, uas feem ntau siv nyob rau hauv cov ntaub ntawv xws li kev tsim kho, cov nplaum, thiab pobzeb cov nplaum. Nws lub ntsiab muaj nuj nqi yog rau redisperse mus rau hauv cov dej paug los ntawm kev ntxiv dej, elasticity zoo, dej tsis kam, thiab huab cua tsis kam.
Cov muaj pes tsawg leeg ntawm cov liab polymer hmoov (RDP) tuaj yeem txheeb xyuas los ntawm ntau yam, feem ntau yog suav nrog cov hauv qab no:
1. Polymer Resin
Cov tub ntxhais tivthaiv ntawm redispersible polymer hmoov yog polymer cob, uas feem ntau yog cov polscermer tau los ntawm emulsion polymerization. Hom Polymer Resins suav nrog:
Cawv (PVA): muaj advesion zoo thiab ua yeeb yaj kiab zoo nkauj thiab yog siv dav hauv cov ntaub ntawv hauv tsev.
Polyacrylates (xws li polyacrylates, polyurethanes, thiab lwm yam): muaj lub zog zoo dua, kev sib raug zoo lub zog, thiab dej tsis kam.
Polystyrene (PS) lossis ethylene-vinyl acetate copolymer (EVA): feem ntau siv los txhim kho cov khoom ua yeeb yaj kiab, nce cov dej tsis kam, thiab huab cua tsis kam.
Polymethyl metharicallate (PMMA): Lub polymer no muaj kev tawm tsam zoo thiab pob tshab.
Daim ntawv Polinymer cov tshuaj polymer los ntawm cov tshuaj pleev xim polymerization, thiab tom qab ntawd cov dej qhuav, thiab thaum kawg ib daim ntawv recispersible polymer (RDP) hauv daim foos hmoov.
2. Tsau
Txhawm rau tswj hwm kev ruaj ntseg ntawm polymer hais thiab zam kev ua kom ntxhov siab hauv cov hmoov, ib qho tsim nyog ntawm cov surfactants yuav raug ntxiv thaum lub sijhawm ntau lawm. Lub luag haujlwm ntawm surfactants yog txhawm rau txo cov nro kom nruj ntawm cov khoom thiab pab cov khoom tawg hauv dej. Cov kev ua tau zoo li muaj xws li:
Tsis-ionic surfactants (xws li polyethers, polyethylene glycols, thiab lwm yam).
Anionic surfactants (xws li fatty acid salts, Alkyl sulfonates, thiab lwm yam).
Cov surfactants tuaj yeem txhim kho qhov tsis sib xws ntawm cov liab liab polymer (RDP) S, cia cov hmoov av yas kom rov ua cov emulsion tom qab ntxiv dej.
3. Pillers thiab Thickeners
Txhawm rau kho qhov ua tau zoo ntawm cov hmoov zoo ntawm cov hmoov nplej thiab txo cov nqi, qee cov neeg ua haujlwm thiab cov tuab tuab thiab cov tuab tuab thiab tuab tuaj yeem ntxiv thaum tsim khoom. Muaj ntau hom kev pab tub rog, thiab cov uas muaj:
Calcium carbonate: ib feem ntau siv inorganic muab tub lim uas tuaj yeem nce cov nplaum thiab txhim kho tus nqi-ua tau zoo.
TALC: tuaj yeem nce cov xim thiab tawg tsis taus ntawm cov khoom siv.
Silicate zaub mov: xws li bentonite, nthuav graphite, thiab lwm yam, tuaj yeem txhim kho qhov tawg tsis kam thiab dej tsis kam ntawm cov khoom.
Thickeners feem ntau yog siv los kho cov viscosity ntawm cov khoom kom yoog nws mus rau cov kev tsim kho sib txawv. Cov tuab tuab xws li hydroxypropyl methylcelulose (HPMC) thiab polyvinyl cawv (PVA).
4. Cov neeg sawv cev los ntawm
Cov khoom hmoov, nyob rau hauv thiaj li yuav tiv thaiv agglomeration thaum lub sijhawm thauj khoom thiab kev thauj mus los, tiv thaiv kev tawm tsam kuj tseem yuav ntxiv thaum lub sijhawm tsim khoom. Anti-Cakake Ceg ua cov neeg sawv cev tsuas yog qee cov tshuaj zoo me me, sikinga silicate, etc. Cov tshuaj no tuaj yeem tiv thaiv cov lus los ntawm agglomerating ua ke.
5. Lwm yam kev sib ntxiv
Redispersible polymer hmoov (RDP) kuj tseem muaj qee cov tshuaj ntxiv tshwj xeeb los txhim kho cov khoom ntiag tug:
UV-resistant tus neeg saib xyuas: txhim kho huab cua tsis kam thiab tiv thaiv kev laus ntawm cov khoom.
Cov neeg sawv cev tua kabmob: Txo kev loj hlob ntawm cov kab mob me, tshwj xeeb tshaj yog thaum siv rau hauv ib puag ncig noo.
Lub hnab yas teb: txhim kho qhov yooj thiab tawg tsis kam tiv taus ntawm cov hmoov yas.
Cov tshuaj tiv thaiv: Tiv thaiv cov ntaub ntawv los ntawm khov rau hauv qhov chaw ib puag ncig tsawg, cuam tshuam kev tsim kho thiab siv cov teebmeem.
6. Noo noo
Txawm hais tias Redispersible polymer hmoov (RDP) yog nyob rau hauv daim ntawv ntawm cov hmoov av qhuav, nws kuj yuav tsum muaj qee cov ntsiab lus noo noo, thiab cov ntsiab lus noo yog tswj tau hauv qab 1%. Cov ntsiab lus noo noo tsim nyog pab tswj cov dej thiab ntev ntev ntawm cov hmoov.
Lub luag haujlwm thiab kev ua tau ntawm Recispersible polymer hmoov (RDP)
Lub luag haujlwm tseem ceeb ntawm Redispersible polymer hmoov (RDP) yog tias nws tuaj yeem muab rov qab los tsim cov emulsion tom qab ntxiv cov dej tseem ceeb:
Zoo heev adhesion: txhim kho txoj kev muaj peev xwm sib raug zoo ntawm cov txheej txheem thiab cov nplaum, thiab ua kom muaj zog ua kom muaj zog ntawm cov ntaub ntawv hauv tsev.
Elasticity thiab hloov tau: txhim kho elasticity ntawm txheej, txhim kho nws cov kev tawm tsam tsis kam thiab cuam tshuam tsis kam.
Dej Tsis kam: Txhim kho cov dej tsis kam ntawm cov khoom, haum rau kev siv hauv cov chaw sab nraum zoov lossis av noo.
Huab cua Kuj: Txhim kho cov khoom siv UV tiv taus, tiv thaiv kev laus thiab lwm yam khoom, thiab txuas ntxiv nws lub neej pabcuam.
Nrib tsis kam: Nws muaj cov kab tawg ua tau zoo thiab yog qhov tsim nyog rau kev tiv thaiv kev tawg hauv kev tsim kho cov dej num.
Rdpyog tsim los ntawm kev hloov pauv emulsion rau hauv cov hmoov los ntawm cov txheej txheem nruj. Nws muaj ntau yam zoo tshaj plaws thiab tau siv dav hauv kev tsim kho, cov xim nplaum, cov nplaum thiab lwm thaj teb. Kev xaiv thiab cov feem ntawm nws cov khoom xyaw cuam tshuam nws qhov kev ua tau kawg.
Lub sijhawm Post: Mar-11-2025