Redispersible Polymer Hmoov (RDP)yog lub siab molecular polymer hmoov, feem ntau yog tsim los ntawm polymer emulsion los ntawm kev ziab kom qhuav. Nws muaj cov cuab yeej ntawm redispersibility nyob rau hauv dej thiab yog dav siv nyob rau hauv kev tsim kho, coatings, adhesives thiab lwm yam teb. Cov txheej txheem ntawm kev ua ntawm Redispersible Polymer Powder (RDP) yog ua tiav los ntawm kev hloov cov khoom siv cement, txhim kho kev sib raug zoo, thiab txhim kho kev tsim kho.
1. Cov muaj pes tsawg leeg thiab cov khoom ntawm Redispersible Polymer Powder (RDP)
Lub hauv paus muaj pes tsawg leeg ntawm Redispersible Polymer Powder (RDP) yog polymer emulsion, uas feem ntau yog polymerized los ntawm monomers xws li acrylate, ethylene, thiab vinyl acetate. Cov polymer molecules tsim cov khoom zoo los ntawm emulsion polymerization. Thaum lub sij hawm cov txheej txheem ziab qhuav, dej raug tshem tawm los ua cov hmoov amorphous. Cov hmoov no tuaj yeem hloov pauv hauv dej kom tsim cov khoom siv polymer ruaj khov.
Cov yam ntxwv tseem ceeb ntawm Redispersible Polymer Powder (RDP) suav nrog:
Dej solubility thiab redispersibility: Nws tuaj yeem tawg sai sai hauv dej los tsim ib qho polymer colloid.
Txhim kho lub cev muaj zog: Los ntawm kev ntxiv Redispersible Polymer Powder (RDP), lub zog sib txuas, lub zog tensile thiab kev cuam tshuam ntawm cov khoom xws li cov coatings thiab mortars tau txhim kho.
Huab cua tsis kam thiab tshuaj tiv thaiv: Qee hom Redispersible Polymer Powder (RDP) muaj kev tiv thaiv zoo heev rau UV rays, dej thiab tshuaj lom neeg corrosion.
2. Mechanism ntawm kev ua ntawm Redispersible Polymer Powder (RDP) hauv cov khoom siv cement
Txhim kho kev sib raug zoo Lub luag haujlwm tseem ceeb ua los ntawm Redispersible Polymer Powder (RDP) hauv cov ntaub ntawv cement-based yog txhawm rau txhim kho nws lub zog sib txuas. Kev sib cuam tshuam ntawm cov cement paste thiab polymer dispersion system ua rau cov khoom siv polymer kom ua tau zoo rau saum npoo ntawm cov cement hais. Nyob rau hauv microstructure ntawm cement tom qab hardening, polymer molecules txhim khu lub zog sib txuas ntawm cov cement hais los ntawm interfacial kev txiav txim, yog li txhim kho lub zog sib txuas thiab compressive zog ntawm cov ntaub ntawv cement.
Txhim kho kev yooj yim thiab tawg tsis kam Redispersible Polymer Powder (RDP) tuaj yeem txhim kho qhov yooj yim ntawm cov khoom siv cement. Thaum cov ntaub ntawv cement-based yog qhuav thiab tawv, polymer molecules nyob rau hauv cement paste tuaj yeem tsim ib zaj duab xis los ua kom lub zog ntawm cov khoom. Nyob rau hauv txoj kev no, cov cement mortar los yog pob zeb tsis ua rau cov kab nrib pleb thaum raug rau sab nraud, uas txhim kho kev tawg. Tsis tas li ntawd, kev tsim cov yeeb yaj kiab polymer kuj tuaj yeem txhim kho kev hloov pauv ntawm cov ntaub ntawv cement-based rau ib puag ncig sab nraud (xws li cov av noo hloov pauv, kub hloov, thiab lwm yam).
Kho kev tsim kho kev ua tau zoo Qhov sib ntxiv ntawm redispersible kua nplaum hmoov kuj tuaj yeem txhim kho kev tsim kho ntawm cov khoom siv cement. Piv txwv li, ntxiv cov kua nplaum redispersible rau cov tshuaj khib nyiab qhuav tuaj yeem txhim kho nws txoj haujlwm zoo thiab ua rau cov txheej txheem tsim kho kom zoo dua. Tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem xws li phab ntsa painting thiab pobzeb pasting, fluidity thiab dej tuav ntawm slurry yog txhim khu kev qha, tsis txhob muaj kev sib txuas tsis ua hauj lwm los ntawm cov dej evaporation ntxov ntxov.
Txhim kho dej tsis kam thiab ua haujlwm ntev Kev tsim cov yeeb yaj kiab polymer tuaj yeem tiv thaiv dej nkag tau zoo, yog li txhim kho cov dej tsis kam ntawm cov khoom. Hauv qee qhov chaw ntub dej lossis dej ntub dej, qhov sib ntxiv ntawm cov polymers tuaj yeem ncua cov txheej txheem kev laus ntawm cov khoom siv cement thiab txhim kho lawv cov kev ua haujlwm ntev. Tsis tas li ntawd, lub xub ntiag ntawm cov polymers kuj tuaj yeem txhim kho cov khoom tiv thaiv te, tshuaj tiv thaiv corrosion, thiab lwm yam, thiab ua kom lub zog ntawm lub tsev tsim.
3. Daim ntawv thov ntawm Redispersible Polymer Powder (RDP) hauv lwm daim teb
Qhuav-siv mortar Nyob rau hauv qhuav-mixed mortar, qhov sib ntxiv ntawm Redispersible Polymer Powder (RDP) tuaj yeem txhim kho qhov adhesion, tawg tiv thaiv thiab kev tsim kho ntawm lub mortar. Tshwj xeeb tshaj yog nyob rau hauv thaj chaw ntawm sab nrauv phab ntsa rwb thaiv tsev, pobzeb sib txuas, thiab lwm yam, ntxiv qhov tsim nyog ntawm Redispersible Polymer Powder (RDP) rau cov tshuaj khib nyiab qhuav tuaj yeem txhim kho kev ua haujlwm thiab kev tsim kho zoo ntawm cov khoom.
Architectural coatings Redispersible Polymer Powder (RDP) tuaj yeem txhim kho qhov adhesion, dej tsis kam, huab cua tsis kam, thiab lwm yam ntawm architectural coatings, tshwj xeeb tshaj yog nyob rau hauv cov coatings uas yuav tsum tau ua haujlwm siab xws li sab nrauv phab ntsa coatings thiab pem teb coatings. Ntxiv Redispersible Polymer Powder (RDP) tuaj yeem txhim kho nws cov yeeb yaj kiab tsim thiab adhesion thiab txuas ntxiv lub neej kev pab cuam ntawm txheej.
Adhesives Hauv qee cov khoom siv nplaum tshwj xeeb, xws li pobzeb nplaum, gypsum adhesives, thiab lwm yam, ntxiv Redispersible Polymer Powder (RDP) tuaj yeem txhim kho kev sib raug zoo ntawm lub zog thiab txhim kho qhov siv tau thiab kev tsim kho ntawm cov nplaum.
Cov ntaub ntawv tsis muaj dej hauv cov ntaub ntawv tsis muaj dej, qhov sib ntxiv ntawm cov polymers tuaj yeem tsim cov txheej txheem ntawm cov yeeb yaj kiab ruaj khov, tiv thaiv dej nkag tau zoo, thiab txhim kho cov dej tsis zoo. Tshwj xeeb tshaj yog nyob rau hauv qee qhov kev xav tau siab (xws li hauv qab daus dej, ru tsev waterproofing, thiab lwm yam), kev siv Redispersible Polymer Powder (RDP) tuaj yeem txhim kho cov dej tsis zoo.
Lub mechanism ntawm kev ua ntawmRDP, feem ntau los ntawm nws cov redispersibility thiab polymer zaj duab xis-tsim cov yam ntxwv, muab ntau yam kev ua haujlwm hauv cov khoom siv cement, xws li kev txhim kho kev sib raug zoo, txhim kho kev yooj yim, txhim kho dej tsis kam, thiab kho kev tsim kho. Tsis tas li ntawd, nws kuj qhia tau hais tias kev ua tau zoo nyob rau hauv kev ua haujlwm ntawm cov khoom sib xyaw qhuav, cov txheej txheem vaj tsev, cov nplaum, cov ntaub ntawv tsis muaj dej, thiab lwm yam. Yog li ntawd, daim ntawv thov ntawm Redispersible Polymer Powder (RDP) hauv cov khoom siv hauv tsev niaj hnub no tseem ceeb heev.
Post lub sij hawm: Feb-17-2025