Redispersible polymer hmoov (RDP) yog copolymer ntawm vinyl acetate thiab ethylene tsim los ntawm cov tshuaj tsuag cov txheej txheem kom qhuav. Nws yog cov khoom xyaw tseem ceeb hauv ntau qhov kev siv kev tsim kho, muab cov nplaum txhim kho zoo dua, hloov tau zoo dua thiab cov khoom siv ruaj khov rau cov khoom noj. Kev tsim cov redispersible polymer hmoov muaj ntau kauj ruam.
1. Raw Khoom Xaiv:
Vinyl acetect-ethylene copolymer: cov khoom siv tseem ceeb ntawm RDP yog copolymer ntawm vinyl acetate thiab ethylene. Cov copolymer no tau xaiv rau nws cov nplaum nplaum zoo tshaj plaws thiab muaj peev xwm ua kom muaj kev yoog raws thiab tawv ntawm cov khoom noj paj huam.
2. Emulsion Polymerization:
Cov txheej txheem ntau lawm pib nrog emulsion polascerization, nyob rau hauv uas vinyl acetate thiab ethylene monomers yog polymerized nyob rau hauv muaj cov pib thiab stabilizers.
Txheej txheem emulsion polinderization yog ua tib zoo tswj kom tau txais qhov hnyav molecular hnyav, muaj pes tsawg leeg, thiab copolymer qauv.
3. Cov tshuaj tiv thaiv thiab Copolymerization:
Vinyl acetate thiab ethylene monomers hnov mob nyob rau hauv lub xub ntiag ntawm catalyst los ua tus copolymer.
Txheej txheem copolymerizer yog qhov tseem ceeb kom tau txais cov polymers nrog cov khoom xav tau, suav nrog kev ua yeeb yaj kiab zoo thiab kev rov ua yeeb yaj kiab zoo.
4. Txau kom qhuav:
Cov emulsion yog tom qab ntawd raug rau cov tshuaj tsuag cov txheej txheem kom qhuav. Qhov no suav nrog kev txau cov emulsion mus rau hauv lub kub chav kub, qhov twg cov dej ntws tawm, tawm hauv qab cov khoom qab ntawm cov liab polymer.
Txau cov mob kom sov, xws li kub thiab cua, yog ua tib zoo tswj kom muaj kev tsim ntawm dawb-ntws cov hmoov zoo.
5. Nto Kho:
Cov kev kho deg feem ntau siv los txhim kho kev cia khoom ruaj khov thiab kev rov ua haujlwm ntawm polymer hmoov.
Hydrophobic additives lossis tiv thaiv kev tiv thaiv feem ntau siv nyob rau hauv kev kho mob hauv cov tshuaj kom tiv thaiv kom tsis txhob muaj agglomeration thiab txhim kho hmoov tawg hauv dej.
6. Tswjhwm Zoo:
Nruj me ntsis kev ntsuas tau siv thoob plaws hauv kev tsim khoom. Cov kev faib tawm xws li particle loj faib, ntom ntom ntom, tseem ceeb monomer cov ntsiab lus thiab kub hloov pauv kom ntseeg tau cov khoom lag luam.
7. Ntim:
Cov hmoov nplej siab kawg polymer yog ntim rau hauv cov dej noo-pov thawj los tiv thaiv kev nqus dej, uas yuav cuam tshuam tsis zoo rau nws qhov kev ua tau zoo.
Cov ntawv thov ntawm Redispersible polymer hmoov:
RDP yog siv nyob rau hauv ntau cov kev siv cov ntaub ntawv siv xws li cov pobzeb cov khoom sib txuas, kev ua haujlwm sab nraud, sab nrauv sab nrauv.
Cov hmoov txhim kho cov khoom xws li cov dej tsis kam, hloov tau thiab cov khoom noj ua ke, pab txhim kho kev ua tau zoo tag nrho thiab ruaj khov ntawm cov ntaub ntawv hauv tsev.
Hauv kev xaus:
Cov hmoov polymer polymer yog cov khoom siv tseem ceeb rau cov ntawv thov tseem ceeb hauv kev ua haujlwm. Nws ntau lawm koom nrog kev ua tib zoo xaiv, emulsion polymerization, tsuag kom qhuav, ua kom muaj kev ntsuas nto thiab ua kom nruj zoo tswj kev ntsuas.
Kev tsim cov redispersible polymer hmoov yog cov txheej txheem nyuaj thiab saib xyuas kom meej kom tau txais cov khoom lag luam zoo nrog cov khoom yuav tsum muaj rau kev siv.
Lub Sijhawm Post: Kaum-18-2023