Redispersible polymer hmoov (RDP) yog copolymer ntawm vinyl acetate thiab ethylene uas ua los ntawm cov txheej txheem ziab kom qhuav. Nws yog ib qho tseem ceeb muaj nyob rau hauv ntau yam kev siv kev tsim kho, muab kev zoo dua adhesion, yooj thiab durability rau cov khoom siv cement. Kev tsim cov khoom siv rov ua dua tshiab polymer cov hmoov muaj ob peb kauj ruam.
1. Raw khoom xaiv:
Vinyl acetate-ethylene copolymer: Cov khoom siv tseem ceeb ntawm RDP yog copolymer ntawm vinyl acetate thiab ethylene. Cov copolymer no tau raug xaiv rau nws cov khoom nplaum zoo heev thiab muaj peev xwm ua rau kom yooj yim thiab tawv ntawm cov ntaub ntawv cementitious.
2. Emulsion polymerization:
Cov txheej txheem ntau lawm pib nrog emulsion polymerization, nyob rau hauv uas vinyl acetate thiab ethylene monomers yog polymerized nyob rau hauv lub xub ntiag ntawm pib thiab stabilizers.
Cov txheej txheem emulsion polymerization yog ua tib zoo tswj kom tau qhov xav tau qhov hnyav molecular, muaj pes tsawg leeg, thiab copolymer qauv.
3. Cov tshuaj tiv thaiv thiab copolymerization:
Vinyl acetate thiab ethylene monomers react nyob rau hauv lub xub ntiag ntawm ib tug catalyst los tsim ib copolymer.
Cov txheej txheem copolymerization yog qhov tseem ceeb heev kom tau txais cov polymers nrog cov khoom xav tau, suav nrog cov yeeb yaj kiab zoo tsim thiab rov ua dua tshiab.
4. Txau kom qhuav:
Tom qab ntawd cov emulsion yog raug rau cov txheej txheem tshuaj tsuag kom qhuav. Qhov no suav nrog kev txau cov emulsion mus rau hauv chav kub kub, qhov twg cov dej evaporates, tawm hauv qab cov khoom ntawm cov khoom siv rov ua dua tshiab.
Txau kom qhuav tej yam kev mob, xws li kub thiab airflow, ua tib zoo tswj kom ntseeg tau tias tsim cov dawb-flowing nplua hmoov hais.
5. Kev kho deg:
Kev kho deg feem ntau yog siv los txhim kho kev ruaj ntseg cia thiab rov ua dua ntawm cov hmoov polymer.
Hydrophobic additives los yog tiv thaiv colloids feem ntau yog siv nyob rau hauv cov kev kho mob saum npoo los tiv thaiv particle agglomeration thiab txhim khu hmoov dispersion nyob rau hauv dej.
6. Kev tswj kom zoo:
Kev tswj xyuas nruj nruj yog siv thoob plaws hauv cov txheej txheem tsim khoom. Tsis muaj xws li particle loj tis, bulk ntom, residual monomer cov ntsiab lus thiab iav hloov kub yog saib xyuas kom ntseeg tau cov khoom sib xws.
7. Ntim:
Qhov kawg redispersible polymer hmoov yog ntim rau hauv cov thawv ntim dej noo kom tiv thaiv kev nqus dej, uas tuaj yeem cuam tshuam tsis zoo rau nws txoj haujlwm.
Daim ntawv thov ntawm Redispersible Polymer Powder:
RDP yog siv nyob rau hauv ntau yam kev tsim kho daim ntawv thov nrog rau cov pobzeb nplaum, nws tus kheej-leveling compounds, sab nrauv rwb thaiv tsev xov (EIFS) thiab cement mortars.
Cov hmoov txhim khu cov khoom xws li dej tsis kam, yoog raws thiab adhesion, pab txhim kho tag nrho cov kev ua tau zoo thiab kav ntev ntawm cov khoom siv hauv tsev.
nyob rau hauv xaus:
Redispersible polymer hmoov yog ntau yam khoom siv nrog kev siv tseem ceeb hauv kev tsim kho kev lag luam. Nws cov khoom lag luam suav nrog kev ua tib zoo xaiv cov khoom siv raw, emulsion polymerization, tshuaj tsuag kom qhuav, kho qhov chaw thiab kev tswj xyuas nruj.
Kev tsim cov khoom siv rov ua dua tshiab polymer hmoov yog txheej txheem nyuaj uas yuav tsum tau ua kom tiav thiab ua tib zoo saib kom meej kom tau txais cov khoom lag luam zoo nrog cov khoom tsim nyog rau kev tsim kho.
Post lub sij hawm: Dec-18-2023