Cov tshuaj dispersants yog cov khoom siv ntxiv rau saum npoo uas siv los tswj cov khoom khov hauv cov xov xwm xws li cov nplaum, xim, yas thiab cov yas sib xyaw.

Yav dhau los, cov txheej txheem tsis tas yuav muaj cov tshuaj dispersants. Cov txheej txheem xws li alkyd thiab nitro xim tsis xav tau cov tshuaj dispersants. Cov tshuaj dispersants tsis tau tshwm sim kom txog thaum acrylic resin xim thiab polyester resin xim. Qhov no kuj muaj feem cuam tshuam nrog kev tsim cov pigments, vim tias kev siv cov pigments siab heev tsis tuaj yeem sib cais los ntawm kev pab ntawm cov tshuaj dispersants.
Cov tshuaj dispersants yog cov khoom siv ntxiv rau saum npoo uas siv los ua kom cov khoom khov kho hauv cov xov xwm xws li cov nplaum, xim, yas thiab cov yas sib xyaw. Ib kawg ntawm nws yog cov saw hlau uas tuaj yeem yaj rau hauv ntau yam xov xwm dispersion, thiab lwm qhov kawg yog cov xim anchoring pawg uas tuaj yeem nqus tau rau ntawm qhov chaw ntawm ntau yam xim thiab siv los hloov mus ua cov khoom khov / kua interface (cov xim / resin kua).

Cov kua nplaum yuav tsum nkag mus rau hauv qhov chaw ntawm cov xim agglomerates. Txhua cov xim muaj nyob ua cov xim agglomerates, uas yog "kev sib sau ua ke" ntawm cov xim me me, nrog cua thiab dej noo nyob hauv qhov chaw sab hauv ntawm cov xim me me. Cov khoom me me sib cuag nrog ib leeg ntawm ntug thiab ces kaum, thiab kev sib cuam tshuam ntawm cov khoom me me yog qhov me me, yog li cov zog no tuaj yeem kov yeej los ntawm cov khoom siv dispersion ib txwm muaj. Ntawm qhov tod tes, cov aggregates yog compact dua, thiab muaj kev sib cuag ntsej muag ntawm cov xim me me, yog li nws nyuaj dua los faib lawv mus rau hauv cov khoom me me. Thaum lub sijhawm sib tsoo cov xim dispersion, cov xim agglomerates maj mam ua me dua; qhov xwm txheej zoo tshaj plaws yog kom tau txais cov khoom me me.

Cov txheej txheem sib tsoo xim muaj peb kauj ruam hauv qab no: thawj kauj ruam yog ntub. Thaum do, tag nrho cov huab cua thiab cov dej noo ntawm qhov chaw ntawm cov xim raug ntiab tawm thiab hloov los ntawm cov kua resin. Tus dispersant txhim kho qhov ntub ntawm cov xim, tig qhov sib txuas khoom / roj mus rau hauv qhov sib txuas khoom / kua thiab txhim kho kev sib tsoo zoo; kauj ruam thib ob yog cov txheej txheem sib tsoo xim dispersion tiag tiag. Los ntawm kev cuam tshuam lub zog thiab lub zog shear, cov xim agglomerates raug tawg thiab qhov loj me ntawm cov khoom me me raug txo kom cov khoom me me. Thaum cov xim raug qhib los ntawm lub zog tshuab, tus dispersant yuav nqus thiab qhwv cov khoom me me; hauv kauj ruam thib peb kawg, cov xim dispersion yuav tsum ruaj khov txaus kom tiv thaiv kev tsim cov flocculation tsis tswj hwm.

Kev siv cov tshuaj dispersant uas tsim nyog tuaj yeem ua rau cov xim me me nyob deb ntawm ib leeg yam tsis rov qab sib cuag. Hauv feem ntau daim ntawv thov, xav tau lub xeev ruaj khov deflocculated. Hauv qee daim ntawv thov, cov xim dispersion tuaj yeem ruaj khov nyob rau hauv cov xwm txheej tswj hwm coflocculation. Cov khoom pab ntub tuaj yeem txo qhov sib txawv ntawm qhov nro ntawm cov xim thiab cov kua resin, ua kom cov xim agglomerates ntub sai dua los ntawm cov resin; cov khoom pab dispersing txhim kho qhov ruaj khov ntawm cov xim dispersion. Yog li ntawd, tib yam khoom feem ntau muaj cov haujlwm ntawm ob qho tib si ntub thiab dispersing pab.

Kev tawg ntawm cov xim yog ib qho txheej txheem los ntawm kev sib sau ua ke mus rau lub xeev tawg. Thaum qhov loj me ntawm cov khoom me me txo qis thiab thaj chaw ntawm qhov chaw nce ntxiv, lub zog ntawm qhov chaw ntawm lub cev kuj nce ntxiv.
Vim tias lub zog ntawm qhov chaw ntawm lub cev yog ib qho txheej txheem uas tsis muaj zog, qhov pom tseeb dua ntawm qhov nce ntawm thaj chaw, qhov ntau dua lub zog yuav tsum tau siv los ntawm sab nraud thaum lub sijhawm sib tsoo, thiab qhov muaj zog dua ntawm cov tshuaj dispersant yuav tsum tau ua kom lub cev muaj zog. Feem ntau, cov xim inorganic muaj cov khoom me me loj dua, cov cheeb tsam tshwj xeeb qis dua, thiab qhov siab dua ntawm qhov chaw polarity, yog li lawv yooj yim dua rau disperse thiab stabilize; thaum ntau yam organic pigments thiab carbon dub muaj cov khoom me me, cov cheeb tsam tshwj xeeb loj dua, thiab qhov qis dua ntawm qhov chaw polarity, yog li nws nyuaj dua rau disperse thiab stabilize lawv.

Yog li ntawd, cov tshuaj dispersants feem ntau muab peb yam ntawm kev ua tau zoo: (1) txhim kho cov xim ntub thiab txhim kho kev sib tsoo zoo; (2) txo cov viscosity thiab txhim kho kev sib raug zoo nrog cov khoom siv hauv paus, txhim kho gloss, puv thiab sib txawv ntawm cov duab, thiab txhim kho kev ruaj khov ntawm kev khaws cia; (3) nce cov xim tinting zog thiab cov xim concentration thiab txhim kho cov xim tinting ruaj khov.

Nanjing Reborn Cov Khoom Siv Tshiab muabtus neeg sawv cev rau cov khoom ntub dej rau cov xim thiab cov tshuaj pleev ib ce, suav nrog qee qhov uas phim Disperbyk.

In tsab xov xwm tom ntej, peb yuav tshawb nrhiav cov hom dispersants nyob rau hauv ntau lub sijhawm sib txawv nrog keeb kwm kev loj hlob ntawm dispersants.