Dab tsi yog Redispersible Emulsion Powder?

Redispersible emulsion hmoov (RDP), tseem hu ua redispersible polymer hmoov, yog ib daim ntawv hmoov ntawm dej-raws li emulsion polymer. Nws feem ntau yog tsim los ntawm cov tshuaj tsuag kom qhuav cov sib tov ntawm cov polymer dispersion, feem ntau yog raws li cov yas acetate-ethylene (VAE) los yog vinyl acetate-versatile (VAC/VeoVa) copolymer, nrog rau ntau yam additives xws li kev tiv thaiv colloids, surfactants, thiab plasticizers.

Nov yog yuav ua li cas redispersible emulsion hmoov yog tsim thiab nws cov yam ntxwv tseem ceeb:

Txheej txheem ntau lawm:

1. Polymer emulsion: Lub polymer emulsion yog npaj los ntawm polymerizing monomers xws li yas acetate, ethylene, thiab lwm yam comonomers nyob rau hauv muaj dej thiab emulsifiers. Cov txheej txheem no ua rau tsim cov khoom me me ntawm cov polymer uas tau tawg hauv dej.
2. Ntxiv cov khoom ntxiv: Cov khoom ntxiv xws li kev tiv thaiv colloids, surfactants, thiab plasticizers yuav raug ntxiv rau hauv emulsion los hloov nws cov khoom thiab kev ua haujlwm.
3. Txau kom qhuav: Cov polymer emulsion yog tom qab ntawd muab tso rau hauv lub tshuab ziab khaub ncaws, qhov twg nws tau atomized rau hauv cov tee dej zoo thiab qhuav siv cua kub. Raws li cov dej evaporates, cov khoom ntawm cov ntaub ntawv polymer, ua rau cov hmoov dawb ntws.
4. Kev Sau thiab Ntim: Cov hmoov qhuav yog sau los ntawm hauv qab ntawm lub tshuab ziab khaub ncaws, sieved kom tshem tawm cov khoom loj, thiab tom qab ntawd ntim rau kev khaws cia thiab kev thauj mus los.

Cov yam ntxwv tseem ceeb:

1. Particle Loj: Redispersible emulsion hmoov feem ntau muaj spherical hais nrog diameters li ntawm ob peb micrometers mus rau kaum ntawm micrometers, nyob ntawm seb cov txheej txheem tsim thiab kev tsim tshwj xeeb.
2. Dej Redispersibility: Ib qho tseem ceeb tshaj plaws ntawm RDP yog nws lub peev xwm los hloov pauv hauv dej los tsim cov emulsion ruaj khov thaum tov nrog dej. Qhov no tso cai rau kom yooj yim koom ua ke rau hauv dej-raws li formulations xws li mortars, adhesives, thiab coatings.
3. Cov ntsiab lus Polymer: RDP feem ntau muaj cov ntsiab lus siab ntawm cov khoom polymer, feem ntau yog li ntawm 50% mus rau 80% los ntawm qhov hnyav, nyob ntawm seb hom polymer tshwj xeeb thiab kev tsim.
4. Chemical Composition: Cov tshuaj muaj pes tsawg leeg ntawm RDP sib txawv nyob ntawm seb hom polymer siv thiab lwm yam additives uas muaj nyob rau hauv kev tsim khoom. Cov polymers uas siv hauv RDP suav nrog cov yas acetate-ethylene (VAE) copolymers thiab vinyl acetate-versatile (VAC/VeoVa) copolymer.
5. Kev Ua Haujlwm Zoo: RDP muab ntau yam khoom tsim nyog rau cov qauv, suav nrog kev txhim kho adhesion, yoog raws, dej tsis kam, thiab kav ntev. Nws txhim khu kev ua haujlwm, kev siv lub zog, thiab kev ua haujlwm ntawm ntau yam khoom siv xws li mortars, pobzeb adhesives, renders, thiab self-leveling compounds.

Nyob rau hauv cov ntsiab lus, redispersible emulsion hmoov (RDP) yog ib tug ntau yam hmoov daim ntawv ntawm dej-raws li emulsion polymers siv raws li additives nyob rau hauv ntau yam kev tsim kho thiab kev siv. Nws lub peev xwm los hloov pauv hauv dej, cov ntsiab lus polymer siab, thiab cov khoom siv tau zoo ua rau nws yog ib qho tseem ceeb hauv kev tsim cov khoom siv hauv tsev zoo thiab ruaj khov.