Redispersible Emulsion Powder (RDP) feem ntau yog tsim los ntawm ob peb yam tseem ceeb, txhua tus ua haujlwm rau lub hom phiaj tshwj xeeb hauv kev tsim. Txawm hais tias qhov tseeb muaj pes tsawg leeg tuaj yeem sib txawv nyob ntawm cov chaw tsim khoom thiab cov ntawv thov, cov ntsiab lus tseem ceeb ntawm RDP feem ntau suav nrog:

1. Polymer Base: Cov khoom tseem ceeb ntawm RDP yog cov khoom siv hluavtaws, uas tsim cov pob txha ntawm cov hmoov. Cov khoom siv polymer feem ntau siv hauv RDP yog vinyl acetate-ethylene (VAE) copolymer. Lwm cov polymers xws li vinyl acetate-vinyl versatate (VA / VeoVa) copolymer, ethylene-vinyl chloride (EVC) copolymers, thiab acrylic polymers kuj tseem siv tau nyob ntawm seb cov khoom xav tau.
2. Kev Tiv Thaiv Colloids: RDP tuaj yeem muaj cov tshuaj tiv thaiv colloids xws li cellulose ethers (piv txwv li, hydroxypropyl methylcellulose), polyvinyl cawv (PVA), lossis hmoov txhuv nplej siab. Cov colloids no pab stabilize lub emulsion thaum lub sij hawm tsim khoom thiab cia, tiv thaiv coagulation los yog sedimentation ntawm cov polymer hais.
3. Plasticizers: Plasticizers ntxiv rau RDP formulations los txhim kho kev yooj yim, ua hauj lwm, thiab adhesion. Cov plasticizers uas siv hauv RDP suav nrog glycol ethers, polyethylene glycols (PEGs), thiab glycerol. Cov additives no pab txhim kho kev ua tau zoo thiab ua cov yam ntxwv ntawm RDP hauv ntau daim ntawv thov.
4. Dispersing Agents: Dispersing agents yog siv los xyuas kom meej dispersion uniform thiab redispersibility ntawm RDP hais nyob rau hauv dej. Cov neeg ua haujlwm no txhim kho cov ntub dej thiab tawg ntawm cov hmoov hauv cov tshuab aqueous, tso cai rau kev sib koom ua ke yooj yim rau hauv cov qauv thiab txhim kho kev ruaj ntseg ntawm qhov tshwm sim dispersions.
5. Fillers thiab Additives: RDP formulations yuav muaj fillers thiab additives xws li calcium carbonate, silica, kaolin, los yog titanium dioxide. Cov additives no pab txhim kho kev ua tau zoo, kev ntxhib los mos, thiab zoo li RDP hauv cov ntawv thov tshwj xeeb. Lawv kuj tseem tuaj yeem ua haujlwm ntxiv lossis cov khoom siv ntxiv los txhim kho cov khoom xws li opacity, durability, lossis rheology.
6. Surface Active Agents: Surface Active agents los yog surfactants tuaj yeem raug ntxiv rau RDP formulations los txhim kho wetting, dispersion, thiab compatibility nrog rau lwm yam nyob rau hauv formulations. Cov neeg ua haujlwm no pab txo qhov nro ntawm qhov chaw thiab txhawb kev sib cuam tshuam ntawm RDP hais thiab qhov nruab nrab nyob ib puag ncig, kom ntseeg tau tias muaj kev sib cais thiab kev ua tau zoo hauv kev siv.
7. Anti-foaming Agents: Anti-foaming agents yuav suav nrog hauv RDP formulations los tiv thaiv ua npuas ncauj thaum lub sij hawm tsim los yog daim ntawv thov. Cov neeg ua haujlwm no pab txo qis cua nkag thiab txhim kho kev ruaj ntseg thiab sib xws ntawm RDP dispersions, tshwj xeeb tshaj yog nyob rau hauv high-shear mixing txheej txheem.
8. Lwm yam Additives: Nyob ntawm cov kev cai tshwj xeeb thiab kev ua tau zoo ntawm RDP formulations, lwm yam additives xws li cross-linking agents, stabilizers, antioxidants, or colorants can also be include. Cov additives no pab kho cov khoom thiab kev ua haujlwm ntawm RDP rau cov ntawv thov tshwj xeeb thiab cov neeg siv kawg xav tau.

cov khoom ntawm redispersible emulsion hmoov ua hauj lwm synergistically muab cov khoom uas xav tau xws li adhesion, yooj, dej tsis kam, thiab ua hauj lwm nyob rau hauv ntau yam ntaub ntawv siv thiab siv. Kev xaiv thiab kev tsim ntawm cov khoom no yog qhov tseem ceeb rau kev ua tiav kev ua haujlwm zoo thiab zoo hauv RDP cov khoom.