1. Inorganic thickener
Mafi yawan amfani da kwayoyin bentonite, wanda babban sashinsa shine montmorillonite. Tsarinsa na musamman na lamellar zai iya ba da shafi tare da pseudoplasticity mai ƙarfi, thixotropy, kwanciyar hankali na dakatarwa da lubricity. Ka'idar yin kauri shine cewa foda yana sha ruwa kuma ya kumbura don yin kauri, don haka yana da takamaiman ruwa.
Lalacewar su ne: ƙarancin kwarara da aikin daidaitawa, ba sauƙin tarwatsawa da ƙarawa ba.
2. Cellulose
Mafi yawan amfani da shi shine hydroxyethyl cellulose (HEC), wanda yana da high thickening yadda ya dace, mai kyau dakatar, watsawa da ruwa riƙe Properties, yafi domin thickening na ruwa lokaci.
Rashin hasara shine: rinjayar juriya na ruwa na rufi, rashin isasshen aikin anti-mold, da rashin aiki mara kyau.
3. Acrylic
Acrylic thickeners gaba ɗaya sun kasu kashi biyu: acrylic alkali-swellable thickeners (ASE) da associative alkali-swellable thickeners (HASE).
The thickening ka'idar acrylic acid alkali-swellable thickener (ASE) ne don dissociate da carboxylate lokacin da pH aka gyara zuwa alkaline, sabõda haka, da kwayoyin sarkar aka mika daga wani helical zuwa sanda ta hanyar isotropic electrostatic repulsion tsakanin carboxylate ions, inganta The danko na mai ruwa lokaci. Wannan nau'in thickener kuma yana da inganci mai girma, mai ƙarfi pseudoplasticity da kuma dakatarwa mai kyau.
A associative alkali-swellable thickener (HASE) gabatar hydrophobic kungiyoyin a kan talakawa alkali-swellable thickeners (ASE). Hakazalika, lokacin da aka daidaita pH zuwa alkaline, jima'i na electrostatic repusion tsakanin ions carboxylate ya sa Sarkar kwayoyin halitta ta tashi daga siffar helical zuwa siffar sanda, wanda ya kara danko na lokaci na ruwa; kuma ƙungiyoyin hydrophobic da aka gabatar akan babban sarkar na iya haɗawa da ƙwayoyin latex don ƙara danko na lokaci na emulsion.
Rashin hasara shine: kula da pH, rashin isasshen ruwa da daidaita fim ɗin fenti, mai sauƙin ɗauka bayan.
4. Polyurethane
Polyurethane associative thickener (HEUR) wani hydrophobically modified ethoxylated polyurethane ruwa mai narkewa polymer polymer, wanda nasa wadanda ba ionic associative thickener. Ya ƙunshi sassa uku: hydrophobic tushe, hydrophilic sarkar da polyurethane tushe. Tushen polyurethane yana faɗaɗa a cikin maganin fenti, kuma sarkar hydrophilic tana da ƙarfi a cikin yanayin ruwa. Tushen hydrophobic yana haɗuwa da tsarin hydrophobic kamar ƙwayoyin latex, surfactants, da pigments. , Samar da tsarin cibiyar sadarwa mai girma uku, don cimma manufar kauri.
An halin da thickening na emulsion lokaci, m kwarara da matakin yi, mai kyau thickening yadda ya dace da kuma mafi barga danko ajiya, kuma babu pH iyaka; kuma yana da fa'ida a bayyane a cikin juriya na ruwa, mai sheki, nuna gaskiya, da dai sauransu.
Rashin hasara shine: a cikin tsarin matsakaici da ƙananan danko, tasirin anti-settingly akan foda ba shi da kyau, kuma ana iya samun sauƙin tasiri ta hanyar rarrabawa da kaushi.
Lokacin aikawa: Dec-29-2022