Redispersible polymer hmoov (RDP) yog cov sib xyaw ua ke ntawm polymers thiab cov quav ntxiv uas tau siv dav hauv cov khoom siv tau sib xyaw kom qhuav. Cov hmoov no ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom ua tau zoo xws li cov khoom siv ntau yam xws li cov khoom sib xyaw ntau yam thiab cov ntseeg tau tus kheej.
Cov khoom tseem ceeb:
Polymer puag:
Ethylene vinyl acetate (eva): eva copolymer feem ntau siv nyob rau RDP vim nws cov yeeb yaj kiab zoo tshaj plaws, thiab yoog raws thiab yooj. Lub Vinyl acetate cov ntsiab lus hauv copolymer tuaj yeem hloov kho kom hloov cov khoom ntawm cov polymer.
Vinyl acetate thiab antylene carbonate: nyob ntawm cov kev cai tshwj xeeb ntawm daim ntawv thov, cov tuam txhab yuav siv cov tshuaj tiv thaiv ethylene es tsis txhob siv vinyl acetate. Ethylene carbonate tau txhim kho cov dej tsis kam thiab cov nplaum hauv cov huab cua noo.
Acrylics: Cov Acrylic Polymers, suav nrog Acrylics dawb huv lossis copolymers, tau siv rau lawv cov huab cua tsis kam, kav ntev, thiab versatility. Lawv lub npe hu ua kev muab cov nplaum ua kom zoo rau ntau yam ntawm substrates.
Kev tiv thaiv kev tiv thaiv:
HydroxyPropyyl methylcellueculose (HPMC): HPMC yog cov tiv thaiv kev tiv thaiv feem ntau siv hauv RDP. Nws txhim kho qhov recispersibility ntawm polymer hais thiab txhim kho cov khoom tag nrho ntawm cov hmoov.
Cawv (PVA): PVA yog lwm qhov kev tiv thaiv kev tiv thaiv uas muaj kev ruaj khov uas muaj kev ruaj khov thiab dispersion ntawm polymer hais. Nws tseem ua lub luag haujlwm hauv kev tswj cov viscosity ntawm cov hmoov.
Yas:
Dibutyl phthalate (DBP): DBP yog ib qho piv txwv ntawm cov yas yas uas feem ntau ntxiv rau RDP txhawm rau txhim kho kev hloov pauv thiab ua tiav. Nws pab txo qis lub khob hloov cua sov ntawm cov polymer, ua rau nws feem ntau.
Muab tub lim:
Calcium Carbonate: Fitters xws li calcium carbonate tuaj yeem muab ntxiv rau kev txhim kho txoj kev muaj hmoov thiab kev ntxhib los mos thiab opacity thiab opacity.
Stabilizers thiab antioxidants:
Steeilizers: Cov no tau siv los tiv thaiv kev ua kom tsis txhob muaj kev tawm tsam ntawm cov polymer thaum cia thiab ua.
Antioxidants: antioxidants tiv thaiv cov polymer los ntawm oxidative tsis, ua rau muaj kev ncua ntev ntawm RDP.
Cov haujlwm ntawm txhua feem:
Polymer puag: muab cov yeeb yaj kiab ua yeeb yaj kiab, cov nplaum, yoog raws thiab muaj zog rau cov khoom kawg.
Kev Tiv Thaiv Kev Tiv Thaiv: Txhim kho qhov redispersibility, ruaj khov thiab dispersion ntawm polymer hais.
Lub hnab yas teb: txhim kho hloov tau thiab ua tiav.
Fillers: kho cov khoom xws li kev ntxhib los mos, porosity, thiab opacity.
Steeilizers thiab antioxidants: Tiv thaiv polymer tsis muaj kev cuam tshuam thaum lub sijhawm cia thiab ua.
Hauv kev xaus:
Recispersible polymer hmoov (RDP) yog ib qho khoom noj muaj ntau thiab cov khoom xyaw tseem ceeb hauv cov khoom siv niaj hnub no. Nws cov tshuaj lom neeg muaj pes tsawg leeg, suav nrog cov polymers xws li Eva lossis Acrylic Resins, cov tshuaj tua kab mob, ua kom tiav cov tshuaj antioxidan, yog ua tib zoo ua kom tau raws li cov kev cai tshwj xeeb ntawm txhua daim ntawv thov. Kev sib xyaw ua ke ntawm cov khoom siv no yuav pab tau cov hmoov runcispersibility, muab nyiaj pheeb suab, hloov tau zoo thiab tag nrho kev ua tau zoo hauv kev sib xyaw qhuav.
Lub Sijhawm Post: Kaum-18-2023