Redispersible polymer hmoov (RDP) yog complex mixs ntawm polymers thiab additives uas yog dav siv nyob rau hauv cov ntaub ntawv siv, tshwj xeeb tshaj yog nyob rau hauv zus tau tej cov qhuav mix mortars. Cov hmoov no ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm thiab cov yam ntxwv ntawm ntau yam khoom siv xws li pobzeb adhesives, grouts, self-leveling compounds thiab cementitious plasters.
Cov ntsiab lus tseem ceeb:
Polymer puag:
Ethylene vinyl acetate (EVA): EVA copolymer feem ntau yog siv hauv RDP vim nws cov yeeb yaj kiab zoo heev, adhesion, thiab yoog raws. Cov ntsiab lus vinyl acetate hauv copolymer tuaj yeem hloov kho kom hloov cov khoom ntawm cov polymer.
Vinyl Acetate vs. Ethylene Carbonate: Nyob ntawm cov kev cai tshwj xeeb ntawm daim ntawv thov, cov tuam ntxhab yuav siv ethylene carbonate es tsis txhob siv cov yas acetate. Ethylene carbonate tau txhim kho cov dej tsis kam thiab adhesion nyob rau hauv cov av noo.
Acrylics: Acrylic polymers, nrog rau cov ntshiab acrylics los yog copolymer, yog siv rau lawv tshwj xeeb huab cua tsis kam, durability, thiab versatility. Lawv paub txog kev muab adhesion zoo rau ntau yam substrates.
Kev tiv thaiv colloid:
Hydroxypropyl methylcellulose (HPMC): HPMC yog ib qho kev tiv thaiv colloid feem ntau siv hauv RDP. Nws txhim kho qhov redispersibility ntawm cov khoom polymer thiab txhim kho tag nrho cov khoom ntawm cov hmoov.
Polyvinyl cawv (PVA): PVA yog lwm yam kev tiv thaiv colloid uas pab nyob rau hauv kev ruaj ntseg thiab dispersion ntawm polymer hais. Nws kuj ua lub luag haujlwm hauv kev tswj cov viscosity ntawm cov hmoov.
Plasticizer:
Dibutyl Phthalate (DBP): DBP yog ib qho piv txwv ntawm cov yas yas uas feem ntau ntxiv rau RDP los txhim kho kev yooj yim thiab kev ua haujlwm. Nws pab txo cov iav hloov pauv kub ntawm cov polymer, ua rau nws elastic dua.
muab tub lim:
Calcium Carbonate: Cov khoom ntim xws li calcium carbonate tuaj yeem muab ntxiv los txhim kho cov hmoov nplej ntau thiab muab cov txiaj ntsig zoo los kho cov khoom xws li kev ntxhib los mos, porosity thiab opacity.
Stabilizers thiab antioxidants:
Stabilizers: Cov no yog siv los tiv thaiv degradation ntawm polymer thaum lub sij hawm cia thiab ua.
Antioxidants: Antioxidants tiv thaiv cov polymer los ntawm oxidative degradation, ua kom lub neej ntev ntawm RDP.
Muaj nuj nqi ntawm txhua yam khoom:
Polymer puag: Muab zaj duab xis-tsim cov khoom, adhesion, yooj thiab mechanical zog rau cov khoom kawg.
Kev tiv thaiv colloid: Txhim kho cov redispersibility, stability thiab dispersion ntawm polymer hais.
Plasticizer: Txhim kho kev yooj yim thiab kev ua haujlwm.
Fillers: Kho cov khoom xws li kev ntxhib los mos, porosity, thiab opacity.
Stabilizers thiab antioxidants: Tiv thaiv polymer degradation thaum lub sij hawm cia thiab ua.
nyob rau hauv xaus:
Redispersible polymer hmoov (RDP) yog cov khoom muaj ntau yam thiab tseem ceeb hauv cov khoom siv niaj hnub no. Nws cov tshuaj muaj pes tsawg leeg, suav nrog cov polymers xws li EVA lossis acrylic resins, tiv thaiv colloids, plasticizers, fillers, stabilizers thiab antioxidants, yog ua tib zoo tsim kom tau raws li cov cai ntawm txhua daim ntawv thov. Kev sib xyaw ua ke ntawm cov khoom no pab txhim kho hmoov redispersibility, daim ntawv cog lus lub zog, yooj thiab tag nrho kev ua tau zoo nyob rau hauv qhuav mix mortar formulations.
Post lub sij hawm: Dec-18-2023