Dispersant inonziwo wetting and dispersing agent.Kune rimwe divi, ine yekunyorovesa maitiro, kune rimwe divi, imwe mugumo weboka rayo rinoshanda inogona kushambadzirwa pamusoro pe pigment yakapwanyika kuita zvidimbu zvidimbu, uye imwe magumo inonyungudutswa muhwaro zvinhu kuti igadzire adsorption layer (iyo akawanda adsorption mapoka, iyo yakareba iyo cheni chinongedzo, iyo yakakora iyo adsorption layer) kuburitsa charge repulsion (pendi-yakavakirwa nemvura) kana entropy repulsion (solvent-based paint), kuitira kuti pigment zvidimbu zviparadzwe uye kumiswa mupende. nguva yakareba yekudzivisa flocculation zvakare.Izvi zvinovimbisa kugadzikana kwekuchengetedza kwepende system.
Inowanzo shandiswa mhando dze dispersants.
1.Anionic wetting uye kuparadzira mumiririri
Mazhinji acho anoumbwa neasiri-polar, anopomerwa zvisina kunaka hydrocarbon cheni uye polar hydrophilic boka.Iwo mapoka maviri ari pamagumo maviri emorekuru, achigadzira asymmetric hydrophilic uye oleophilic molecular chimiro.Mhando dzayo ndeidzi: sodium oleate C17H33COONa, carboxylate, sulfate (RO-SO3Na), sulfonate (R-SO3Na), etc. Kuenderana kweanionic dispersants zvakanaka, uye polycarboxylic acid polymers, nezvimwewo zvinogonawo kuiswa kune yakanyungudutswa-based coatings. uye yakashandiswa zvakanyanya seanodzorwa flocculation-mhando dispersants.
2.Cationic wetting uye dispersing agent
Iwo asiri-polar base zvakanaka chaja makomisheni, kunyanya amine munyu, quaternary amine munyu, pyridinium munyu, etc. Cationic surfactants vane simba adsorption simba uye ane nani dispersion effect pamusoro carbon dema, siyana iron oxides uye organic pigments, asi zvinofanira kucherechedzwa. kuti vanoita zvemakemikari neboka re carboxyl muzvinyorwa zvepasi, uyewo cherechedza kuti haifaniri kushandiswa panguva imwe chete neanionic dispersants.
3.Controlled free radical type hyperdispersant
Chechipiri, basa rekuparadzira
1.Kuvandudza gloss uye kuwedzera kuenzana kwemaitiro.
2.Kudzivirira ruvara runoyangarara uye maruva.
3.Improve coloring simba.
4.Reduce viscosity uye kuwedzera pigment loading.
5.Reduce flocculation, kuwedzera constructability uye usability.
6.Prevent recoarse uye kuwedzera kugadzikana kwekuchengetedza.
7.Kuwedzera kupararira kwemavara uye kuzara kwemavara.
8.Kuwedzera kujekesa kana kuvhara simba.
9.Kuvandudza kushanda kwekugaya uye kuderedza mari yekugadzira.
10.Dzivisa kugadzirisa.
Nguva yekutumira: Aug-15-2022