1. lub tswv yim yooj yim
Redispersible polymer hmoovyog lub ntsiab additive rau qhuav hmoov npaj-mixed mortar xws li cement-based los yog gypsum-based.
Redispersible latex hmoov yog ib qho polymer emulsion uas yog tshuaj tsuag-qhuav thiab sib sau ua ke los ntawm thawj 2um los tsim cov duab kheej kheej ntawm 80 ~ 120um. Vim hais tias qhov chaw ntawm cov khoom yog coated nrog ib tug inorganic, hard-structure-resistant hmoov, peb tau qhuav polymer hmoov. Lawv yog cov yooj yim heev rau ncuav thiab lub hnab rau cia nyob rau hauv warehouses. Thaum cov hmoov sib tov nrog dej, cement lossis gypsum-raws li mortar, nws tuaj yeem rov ua dua, thiab cov khoom siv yooj yim (2um) hauv nws yuav rov ua dua rau hauv lub xeev sib npaug rau cov latex qub, yog li nws hu ua redispersible latex hmoov.
Nws muaj zoo redispersibility, rov disperses rau hauv ib qho emulsion ntawm kev sib cuag nrog dej, thiab muaj tib yam tshuaj muaj pes tsawg leeg raws li tus thawj emulsion. Los ntawm kev ntxiv cov hmoov polymer dispersible rau cov cement-raws li los yog gypsum-raws li qhuav hmoov npaj-siv mortar, ntau yam khoom ntawm mortar tuaj yeem txhim kho, xws li:
Txhim kho qhov adhesion thiab cohesion ntawm mortar;
Txo cov dej nqus ntawm cov khoom thiab cov elastic modulus ntawm cov khoom;
Flexural zog, cuam tshuam tsis kam, puas kuj thiab durability ntawm cov ntaub ntawv reinforcement;
Txhim kho kev tsim kho ntawm cov khoom siv, thiab lwm yam.
2. Hom dispersible polymer hmoov
Tam sim no, cov ntawv thov tseem ceeb hauv kev ua lag luam tuaj yeem muab faib ua disperse latex:
Vinyl acetate thiab ethylene copolymer roj hmab hmoov (Vac / E), ethylene thiab vinyl chloride thiab vinyl laurate ternary copolymer roj hmab hmoov (E / Vc / VL), vinyl acetate thiab ethylene thiab siab dua fatty acid vinyl ester terpolymerization Rubber hmoov (Vac / E / VeoVa), vinyl acetate thiab ntau dua fatty acid vinyl ester copolymer roj hmab hmoov (Vac/VeoVa), acrylate thiab styrene copolymer roj hmab hmoov (A/S), vinyl acetate thiab acrylate thiab ntau dua fatty acid Vinyl ester terpolymer roj hmab hmoov (Vac/A/ VeoVa), yas acetate homopolymer roj hmab hmoov (PVac), styrene thiab butadiene copolymer roj hmab hmoov (SBR), thiab lwm yam.
3. Cov muaj pes tsawg leeg ntawm dispersible polymer hmoov
Dispersible polymer hmoov feem ntau yog cov hmoov dawb, tab sis ob peb muaj lwm yam xim. Nws cov khoom xyaw muaj xws li:
Polymer resin: Nws yog nyob rau hauv qhov tseem ceeb ntawm cov roj hmab hmoov hmoov, thiab nws tseem yog lub ntsiab tseem ceeb ntawm redispersible polymer hmoov.
Additive (internal): ua ke nrog cov resin, nws plays lub luag hauj lwm ntawm kev hloov cov resin.
Additives (sab nraud): Cov ntaub ntawv ntxiv yog ntxiv los nthuav ntxiv kev ua tau zoo ntawm cov hmoov polymer dispersible.
Kev tiv thaiv colloid: ib txheej ntawm cov khoom siv hydrophilic qhwv rau saum npoo ntawm cov khoom siv rov ua dua tshiab latex hmoov, kev tiv thaiv colloid ntawm feem ntau redispersible latex hmoov yog polyvinyl cawv.
Anti-caking tus neeg saib xyuas: nplua ntxhia muab tub lim, feem ntau yog siv los tiv thaiv cov roj hmab hmoov los ntawm kev cia thiab kev thauj mus los thiab los pab txhawb kev khiav ntawm cov hmoov roj hmab (pom pov tseg los ntawm cov hnab ntawv lossis cov tankers).
4. Lub luag hauj lwm ntawm dispersible polymer hmoov nyob rau hauv mortar
Lub redispersible latex hmoov yog dispersed mus rau hauv ib zaj duab xis thiab ua raws li ib tug reinforcing neeg sawv cev raws li lub thib ob nplaum;
Cov kev tiv thaiv colloid yog absorbed los ntawm lub mortar system (nws yuav tsis raug puas tsuaj los ntawm dej tom qab tsim zaj duab xis, los yog "secondary dispersion";
Cov zaj duab xis-forming polymer resin yog muab faib thoob plaws hauv lub mortar system raws li ib tug reinforcing khoom, yog li ua kom lub cohesion ntawm lub mortar;
5. Lub luag hauj lwm ntawm dispersible polymer hmoov nyob rau hauv ntub mortar:
Txhim kho kev tsim kho kev ua haujlwm;
Txhim kho cov khoom ntws;
Nce thixotropy thiab sag kuj;
txhim kho kev sib raug zoo;
Post lub sij hawm: Oct-24-2022