Redispersible polymer hmoov (RDP)Yog ib daim hmoov ntawm cov kua txiv uas tuaj yeem ua kom muaj dej nrog dej kom haum rau cov kev tawg ruaj khov. Nws yog feem ntau siv nyob rau hauv kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv kev tsim qauv ntawm cov nplaum, cov nplais grouts, xim av, thiab txheej. Cov hmoov muab cov txiaj ntsig ntau ntxiv, xws li kev txhim kho tau yooj yim, cov tshuaj nplaum, dej tsis kam, thiab kav ntev.
1. Polymer (Tseem Ceeb)
Cov khoom siv tseem ceeb hauv redispersible polymer hmoov yog cov tshuaj ntsuab, feem ntau ntawm cov roj hmab (SBR), ethylene-vinyl acetate (EVA), lossis kev sib txuas ntawm cov no. Cov ntaub ntawv polymer lub nraub qaum ntawm cov dispersion thaum cov hmoov yog qhov rov ua kom zoo.
Polyvinyl acetate (PVA):Feem ntau siv nyob rau hauv cov nplaum thiab txheej ci vim nws cov khoom muaj zog nplaum.
Styrene-Butadiene roj hmab (SBR):Feem ntau hauv kev tsim kho cov ntawv thov vim yog nws yooj thiab siv tau.
Ethylene-Vinyl acetate (EVA):Paub txog nws cov khoom elasticity thiab cov nplaum nplaum, feem ntau siv hauv cov ntawv thov hloov tau.
Lub luag haujlwm:Thaum dej ntxiv rau cov hmoov, cov polymer moleculate thiab ua ib qho ruaj khov, muab cov khoom xav tau xws li adhesion, yooj yim, thiab dej tsis kam.
2. Socfactants (dispersing cov neeg sawv cev)
Surfactants yog cov tshuaj lom neeg uas pab ruaj khov rau cov hmoov looj xau cov hmoov, ua kom nws nyob twj ywm hauv dej tom qab tau rov ua kom zoo. Lawv txo cov nro muaj qhov nro nruab nrab ntawm cov khoom siv, ua kom tiav cov txheej txheem dispersion thiab txhim kho cov hmoov kev ua haujlwm.
Nonionic Surfactants:Cov no yog feem ntau siv los ua kom muaj kev cuam tshuam cov kev sib cais yam tsis cuam tshuam rau kev them nqi ionic.
Anionic Surfactants:Pab kom tiv thaiv kom tsis txhob sib cais particle thiab txhim kho cov dispersion ntawm cov kua yas.
Cationic Surfactants:Qee zaum siv rau cov ntawv thov tshwj xeeb uas xav tau txoj kev them nqi zoo rau kev sib raug zoo.
Lub luag haujlwm:Surfactants pab kom ntseeg tau tias cov hmoov tuaj yeem yooj yim yuav rov qab ua kom yooj yim rau hauv tus du, ruaj khov yam tsis muaj clumping lossis coagulating.
3. Stabilizers
Stabilizers tau ntxiv rau cov roj polymer polymer los tiv thaiv cov tshuaj yas ntawm agglomerating (clumping ua ke). Lawv xyuas kom meej tias thaum cov hmoov tau sib xyaw nrog dej, qhov ua kom muaj kev sib cais yog cov khaub ncaws zoo thiab ruaj khov.
Polyethylene Glycol (Peg):Ib lub stabilizer uas nquag pab tswj cov kev sib cais sib xws.
Cellulose derivatives:Qee lub sij hawm siv los txhim kho kev ruaj khov thiab viscosity ntawm kev dispersion.
Hydrophobically hloov txawv:Cov no tuaj yeem ua cov stabilizers hauv qee qhov kev tsim qauv los tiv thaiv kom tsis txhob sib cais.
Lub luag haujlwm:Stabilizers yog qhov tseem ceeb rau kev tswj kom muaj kev cuam tshuam zoo ntawm cov tshuaj rehydrated latux, ua kom muaj kev sib xws thiab cov ntawv thov zoo.
4. Pillers
Cov fitters yog cov khoom siv ntxiv rau cov hmoov yas kom txo cov nqi, txhim kho qee yam khoom, lossis hloov cov qauv ntawm cov khoom kawg. Cov no suav nrog cov ntaub ntawv xws li calcium carbonate, talc, thiab silica.
Calcium carbonate:Feem ntau siv los ua ib tug muab tub lim rau ntau thiab muab cov kev daws teeb meem zoo hauv cov nplaum thiab cov txheej txheem.
TALC:Siv rau kev txhim kho Flowility thiab tswj lub viscosity ntawm cov khoom.
Silica:Tuaj yeem txhim kho cov khoom siv mechanical thiab khawb tiv thaiv ntawm cov khoom kawg.
Lub luag haujlwm:Cov taub ntim feem ntau ntxiv rau hloov kho lub zog rheological ntawm cov latx dispersion, txhim kho cov txheej txheem, thiab tswj cov txheej txheem kawg.
5. Cov tshuaj tiv thaiv
Cov khoom txuag hluav taws xob muaj nyob rau hauv kev tsim qauv los tiv thaiv microbial kev loj hlob thaum lub sijhawm khaws thiab tswj qhov ruaj khov ntawm cov khoom siv sijhawm. Hom tshuaj tshuaj ua yeeb yam muaj xws li methylisothiazoline, benzisothiazoline, thiab tso formaldehyde-tso cov neeg sawv cev.
Methylisothiazolineone (MIT):Ntu siv dav siv tshwj tseg uas tiv thaiv microbial hauv cov hmoov.
Benzisothiazolinone (ntsis):Zoo ib yam li mit, nws tiv thaiv fungal thiab cov kab mob kis tau.
Lub luag haujlwm:Khaws cia kom muaj kev ncua ntev thiab ruaj khov ntawm cov liab liab polymer hmoov thaum cia, tiv thaiv nws los ntawm kev tsis txhob muaj paug.
6. Coalescing tus neeg sawv cev
Coalescing sawv cev yog tshuaj lom neeg uas pab cov kua yas kom fuse ua ke kom muaj zog dua thaum cov dispersion yog thov rau ib substrate. Lawv txhim kho zaj duab xis tsim, ua cov khoom kawg kom ruaj khov thiab tiv taus hnav thiab kua muag.
2,2,4-trimethyl-1,3-pentanediol:Ib co coalescent siv los txhim kho zaj duab xis tsim hauv emulsions.
Butyl carbitol acetate:Siv nyob rau hauv qee cov khoom yas latex rau kev ntws zoo dua thiab zaj duab xis tsim.
Lub luag haujlwm:Coalescing cov neeg sawv cev txhim kho cov kev ua tau zoo ntawm cov lowex dispersion, ua kom nws ua cov yeeb yaj kiab du, muaj zog rau saum npoo.
7. Yas
Cov hnab yas tau siv los txhim kho qhov hloov tau thiab ua haujlwm ntawm cov liab liab polymer hmoov thaum nws tau thov thiab rov qab los. Lawv txo qis lub khob hloov hloov (TG) ntawm cov polymer, ua cov khoom vaj khoom kawg nkaus xwb.
Di-2-Ethylhexyl phthalate (DEHP):Ib tug nquag siv cov yas siv nyob rau ntau cov khoom lag luam.
Tri-N-Butyl Citrate (TBC):Feem ntau siv los ua cov yas uas tsis muaj tshuaj lom nyob rau hauv kev tsim kho cov ntawv thov.
Lub luag haujlwm:Cov plinesizers txhim kho qhov hloov tau ntawm cov tshuaj rehetrated looj kev faib tawm, txhim kho nws lub peev xwm tiv thaiv kev tawg thiab deformation dhau sijhawm.
8.Phroners
Ph cov kev kho yog ntxiv rau cov qauv ua kom ntseeg tau tias lub latasx tswj hwm qhov ruaj khov pH, uas yog qhov tseem ceeb rau ob qho kev sib cais ntawm lwm cov khoom xyaw.
Ammonium hydroxide: Feem ntau siv los kho pH nyob rau hauv latex formulations.
Sodium hydroxide: Siv los ua kom ntev dua pH thaum tsim nyog.
Lub luag haujlwm:Kev tswj kom muaj qhov tsim nyog ua kom ruaj khov rau qhov ruaj khov ntawm cov kua yas, raws li cov qib qib heev tuaj yeem ua rau muaj kev cuam tshuam lossis qhov tsis txaus ntseeg hauv kev tsim qauv.
Cov lus: Ntsiab ntawm cov khoom xyaw hauvRecispersible polymer hmoov
| Khoom xyaw rau | Muaj nuj nqi / ua haujlwm | Piv txwv |
| Polymer | Ua lub hauv paus ntawm cov dispersion, muab adhesion, yooj yim, thiab ruaj khov | PVA (polyvinyl acetate), sbr (styrene-butadiene roj hmab), Eva (Ethylene-Vinyl acetate) |
| Surfactants | Pab hauv dispersing cov hmoov rau hauv dej, tiv thaiv clumping | Nonionic, anionic, lossis cationic surfactants |
| Stabilizers | Tiv thaiv agglomeration ntawm looj cov lus, kom ua kom muaj kev sib cais sib txawv | PEG (polyethylene glycol), cellulose derivatives, hloov cov hmoov txhuv nplej siab |
| Cov fillers | Hloov kho kev ntxhib los mos, txo tus nqi, txhim kho kev kub heev | Calcium carbonate, talc, silica |
| Tshuaj nqa | Tiv thaiv microbial paug thiab kev tsis sib haum xeeb | Methylisothiazolineone (MIT), Benzisothiazolinone (me ntsis) |
| Coalescing Cov Neeg Sawv Cev | Txhim kho zaj duab xis thiab lub zog ntawm cov khoom kawg | Trimethyl Pentanediol, Butyl Carbitol Acetate |
| Yas tshuab | Txhim kho kom yooj yim thiab ua haujlwm ntawm cov latex ib zaug thov | Dehp (Di-2-Ethylhexyl phthalate), TBC (Tri-N-Butyl Citrate) |
| Phroners | Ceev cov PH kom paub meej tias kev ruaj ntseg thiab ua haujlwm zoo | Ammonium hydroxide, sodium hydroxide |
RdpPuas yog cov khoom siv dav siv nyob rau hauv kev tsim kho thiab txheej, tiv thaiv lawv cov hauj lwm zoo rau qhov kev ua kom zoo ntawm ntau yam khoom xyaw. Txhua feem, los ntawm cov polymer rau cov stabilizers thiab surfactants, ua ib qho kev sib cais tau yooj yim hauv dej, tsim cov latex ruaj khov. Nkag siab txog cov luag haujlwm thiab cov haujlwm ntawm cov khoom xyaw yog qhov tseem ceeb rau kev ua kom ua tau zoo rau lawv cov kev ua tau zoo hauv cov ntawv thov sib txawv, seb puas muaj cov nplaum, lossis cov pleev xim.
Lub sijhawm Post: Feb-15-2025