1. Inorganic thickener
Zomwe zimagwiritsidwa ntchito kwambiri ndi organic bentonite, zomwe chigawo chake chachikulu ndi montmorillonite.Lamellar yake yapadera kapangidwe akhoza endow ❖ kuyanika ndi amphamvu pseudoplasticity, thixotropy, kuyimitsidwa bata ndi lubricity.Mfundo ya thickening ndi yakuti ufa umatenga madzi ndikutupa kuti uwononge gawo la madzi, choncho amakhala ndi madzi osungira madzi.
Zoyipa zake ndi izi: kusayenda bwino komanso kusanja bwino, sikophweka kumwaza ndikuwonjezera.
2. Ma cellulose
Chomwe chimagwiritsidwa ntchito kwambiri ndi hydroxyethyl cellulose.HEC), yomwe imakhala ndi kukhuthala kwakukulu, kuyimitsidwa bwino, kubalalitsidwa ndi kusunga madzi, makamaka pakukulitsa gawo lamadzi.
Zoyipa zake ndi izi: kukhudza kukana kwamadzi kwa zokutira, kusakwanira koletsa nkhungu, komanso kusagwira bwino ntchito.
3. Acrylic
Ma Acrylic thickeners nthawi zambiri amagawidwa m'mitundu iwiri: acrylic alkali-swellable thickeners (ASE) ndi associative alkali-swellable thickeners (HASE).
Mfundo thickening a acrylic asidi alkali-swellable thickener (ASE) ndi kulekanitsa carboxylate pamene pH kusinthidwa kukhala zamchere, kotero kuti unyolo molecular anatambasula kuchokera helical kuti ndodo kudzera isotropic electrostatic repulsion pakati carboxylate ayoni, kuwongolera The mamasukidwe akayendedwe a amadzimadzi gawo.Mtundu uwu wa thickener ulinso ndi kukhuthala kwakukulu, pseudoplasticity yolimba komanso kuyimitsidwa kwabwino.
The associative alkali-swellable thickener (HASE) imayambitsa magulu a hydrophobic pamaziko a alkali-swellable thickeners wamba (ASE).Mofananamo, pamene pH imasinthidwa kukhala zamchere, kugonana kwa amuna kapena akazi okhaokha pakati pa carboxylate ions kumapangitsa Unyolo wa maselo umachokera ku mawonekedwe a helical kupita ku ndodo, zomwe zimawonjezera kukhuthala kwa gawo la madzi;ndi magulu hydrophobic anayambitsa pa unyolo waukulu akhoza kugwirizana ndi latex particles kuonjezera mamasukidwe akayendedwe a emulsion gawo.
Zoyipa zake ndi: kukhudzidwa ndi pH, kuyenda kosakwanira komanso kusanja kwa filimu ya utoto, kosavuta kukulitsa pambuyo pake.
4. Polyurethane
Polyurethane associative thickener (HEUR) ndi hydrophobically kusinthidwa ethoxylated polyurethane madzi sungunuka polima, amene ali non-ionic associative thickener.Zili ndi magawo atatu: hydrophobic base, hydrophilic chain ndi polyurethane base.Mtsinje wa polyurethane umakulirakulira mu njira ya utoto, ndipo unyolo wa hydrophilic umakhala wokhazikika mu gawo lamadzi.Ma hydrophobic base amalumikizana ndi mapangidwe a hydrophobic monga tinthu ta latex, ma surfactants, ndi ma pigment., kupanga maukonde atatu-dimensional dongosolo, kuti akwaniritse cholinga cha thickening.
Amadziwika ndi kukhuthala kwa gawo la emulsion, otaya kwambiri ndi magwiridwe antchito, kukhuthala kwabwino komanso kusungika kwamphamvu kwamphamvu, komanso kulibe malire a pH;ndipo ili ndi ubwino woonekeratu pakukana madzi, gloss, transparency, etc.
Zoyipa zake ndi izi: mu dongosolo lapakati ndi lotsika la viscosity, anti-kukhazikitsa zotsatira pa ufa si zabwino, ndipo thickening zotsatira amakhudzidwa mosavuta dispersants ndi solvents.
Nthawi yotumiza: Dec-29-2022