Redispersible Polymer Hmoov (RDP)yog cov khoom siv hmoov ua los ntawm ziab polymer emulsion, uas feem ntau yog siv rau hauv cov ntaub ntawv xws li kev tsim kho, txheej, nplaum, thiab pobzeb adhesives. Nws lub luag haujlwm tseem ceeb yog txhawm rau rov ua dua rau hauv emulsion los ntawm kev ntxiv dej, muab cov adhesion zoo, elasticity, dej tsis kam, tawg tsis kam, thiab huab cua tsis kam.
Cov muaj pes tsawg leeg ntawm Redispersible Polymer Powder (RDP) tuaj yeem txheeb xyuas los ntawm ntau yam, feem ntau suav nrog cov khoom hauv qab no:
1. Polymer cob
Cov ntsiab lus tseem ceeb ntawm Redispersible Polymer Powder yog polymer resin, uas feem ntau yog cov polymer tau los ntawm emulsion polymerization. Feem ntau cov polymer resins muaj xws li:
Polyvinyl cawv (PVA): muaj adhesion zoo thiab zaj duab xis-forming zog thiab yog dav siv nyob rau hauv lub tsev cov ntaub ntawv.
Polyacrylates (xws li polyacrylates, polyurethanes, thiab lwm yam): muaj elasticity zoo heev, kev sib khi lub zog, thiab dej tsis kam.
Polystyrene (PS) los yog ethylene-vinyl acetate copolymer (EVA): feem ntau yog siv los txhim kho cov yeeb yaj kiab tsim, ua kom dej tsis kam, thiab huab cua tsis kam.
Polymethyl methacrylate (PMMA): Cov polymer no muaj kev tiv thaiv kev laus thiab pob tshab.
Cov polymer resins tsim emulsions los ntawm cov tshuaj tiv thaiv polymerization, thiab tom qab ntawd cov dej hauv emulsion raug tshem tawm los ntawm cov tshuaj tsuag kom qhuav lossis khov kom qhuav, thiab thaum kawg tau txais Redispersible Polymer Powder (RDP) hauv cov hmoov hmoov.
2. Surfactants
Txhawm rau kom muaj kev ruaj ntseg ntawm cov khoom polymer thiab tsis txhob agglomeration nyob rau hauv cov hmoov, ib tug tsim nyog tus nqi ntawm surfactants yuav muab ntxiv thaum lub sij hawm ntau lawm txheej txheem. Lub luag haujlwm ntawm surfactants yog los txo qhov nro ntawm cov khoom thiab pab cov khoom tawg hauv dej. Feem ntau surfactants muaj xws li:
Non-ionic surfactants (xws li polyethers, polyethylene glycols, thiab lwm yam).
Anionic surfactants (xws li fatty acid ntsev, alkyl sulfonates, thiab lwm yam).
Cov surfactants no tuaj yeem txhim kho qhov sib txawv ntawm Redispersible Polymer Powder (RDP)s, tso cai rau cov hmoov latex rov tsim cov emulsion tom qab ntxiv dej.
3. Fillers thiab thickeners
Txhawm rau kho qhov kev ua tau zoo ntawm cov hmoov latex thiab txo cov nqi, qee cov fillers thiab thickeners kuj tau ntxiv thaum lub sij hawm tsim khoom. Muaj ntau ntau hom fillers, thiab cov uas muaj xws li:
Calcium carbonate: feem ntau siv inorganic muab tub lim uas tuaj yeem ua rau adhesion thiab txhim kho tus nqi zoo.
talc: tuaj yeem ua kom cov dej ntws thiab tawg tsis kam ntawm cov khoom.
Silicate minerals: xws li bentonite, nthuav graphite, thiab lwm yam., tuaj yeem txhim kho qhov tawg tsis kam thiab dej tsis kam ntawm cov khoom.
Thickeners feem ntau yog siv los kho cov viscosity ntawm cov khoom kom hloov nws mus rau kev tsim kho sib txawv. Cov thickeners feem ntau suav nrog hydroxypropyl methylcellulose (HPMC) thiab polyvinyl cawv (PVA).
4. Anti-caking tus neeg saib xyuas
Hauv cov khoom siv hmoov, txhawm rau tiv thaiv agglomeration thaum lub sij hawm khaws cia thiab kev thauj mus los, cov tshuaj tiv thaiv kab mob kuj tuaj yeem raug ntxiv thaum lub sijhawm tsim khoom. Anti-caking agents feem ntau yog ib co zoo inorganic tshuaj, xws li txhuas silicate, silicon dioxide, thiab lwm yam. Cov tshuaj no muaj peev xwm tsim ib tug tiv thaiv zaj duab xis nyob rau saum npoo ntawm latex hmoov hais los tiv thaiv particle los ntawm agglomerating ua ke.
5. Lwm yam additives
Redispersible Polymer Powder (RDP) kuj tseem muaj qee qhov tshwj xeeb ntxiv los txhim kho cov khoom tshwj xeeb:
UV-resistant tus neeg sawv cev: txhim kho huab cua tsis kam thiab tiv thaiv kev laus ntawm cov khoom siv.
Antibacterial agent: txo qhov kev loj hlob ntawm cov kab mob, tshwj xeeb tshaj yog thaum siv nyob rau hauv ib qho chaw ntub dej.
Plasticizer: txhim kho qhov yooj thiab tawg tsis kam ntawm latex hmoov.
Antifreeze: Tiv thaiv cov ntaub ntawv los ntawm kev khov rau hauv qhov kub thiab txias, cuam tshuam rau kev tsim kho thiab siv cov teebmeem.
6. Cov dej noo
Txawm hais tias Redispersible Polymer Powder (RDP) yog nyob rau hauv daim ntawv ntawm cov hmoov qhuav, nws kuj yuav tsum tau ib tug npaum li cas ntawm noo noo tswj nyob rau hauv cov txheej txheem ntau lawm, thiab cov dej noo feem ntau tswj tau qis dua 1%. Tsim nyog cov ntsiab lus noo noo pab tswj lub fluidity thiab ntev stability ntawm cov hmoov.
Lub luag haujlwm thiab kev ua haujlwm ntawm Redispersible Polymer Powder (RDP)
Lub luag haujlwm tseem ceeb ntawm Redispersible Polymer Powder (RDP) yog tias nws tuaj yeem hloov pauv los ua ib qho emulsion tom qab ntxiv dej, thiab muaj cov yam ntxwv tseem ceeb hauv qab no:
Zoo heev adhesion: Txhim kho lub peev xwm ntawm kev sib txuas ntawm cov coatings thiab adhesives, thiab txhim kho kev sib raug zoo ntawm cov khoom siv hauv tsev.
Elasticity thiab yoog raws: Txhim kho elasticity ntawm txheej, txhim kho nws cov kab nrib pleb thiab kev cuam tshuam.
Dej tsis kam: Txhim kho cov dej tsis kam ntawm cov khoom siv, tsim nyog siv rau hauv qhov chaw sab nraum zoov lossis qhov chaw ntub dej.
Huab cua tsis kam: Txhim kho cov khoom siv UV tiv thaiv, tiv thaiv kev laus thiab lwm yam khoom, thiab txuas ntxiv nws lub neej kev pab cuam.
Crack tsis kam: Nws muaj qhov ua kom tawg tau zoo thiab tsim nyog rau kev tiv thaiv kev xav tau hauv kev tsim kho.
RDPyog tsim los ntawm kev hloov emulsion polymer rau hauv cov hmoov los ntawm cov txheej txheem sophisticated. Nws muaj ntau yam zoo heev thiab siv dav hauv kev tsim kho, txheej, nplaum thiab lwm yam. Kev xaiv thiab kev faib ua feem ntawm nws cov khoom xyaw ncaj qha cuam tshuam rau nws qhov kev ua tau zoo kawg.
Lub sij hawm xa tuaj: Mar-11-2025