iindaba

I-Dispersant ikwabizwa ngokuba yi-wetting and dispersing agent. Kwelinye icala, inefuthe lokumanzisa, kwelinye icala, elinye icala leqela layo elisebenzayo linokufakwa phezu komphezulu we-pigment etyumkileyo ibe ngamasuntswana amancinci, kwaye elinye icala linyibilikiswa kwizinto ezisisiseko ukuze kwenziwe umaleko we-adsorption (amaqela amaninzi e-adsorption, kokukhona ikhonkco le-chain lide, kokukhona umaleko we-adsorption utyebile) ukuvelisa i-charge repulsion (ipeyinti esekelwe emanzini) okanye i-entropy repulsion (ipeyinti esekelwe kwi-solvent), ukuze amasuntswana e-pigment asasazeke kwaye axhonywe kwipeyinti ixesha elide ukuze kuthintelwe ukungqubana kwakhona. Oku kuqinisekisa uzinzo lokugcina inkqubo yepeyinti.
 
Iindidi ze-dispersants ezisetyenziswa rhoqo.
1. Iarhente yokumanzisa kunye nokusasaza ye-anionic
Uninzi lwazo lwenziwe yi-non-polar, negative charge hydrocarbon chain kunye ne-polar hydrophilic group. La maqela mabini akwiziphelo ezimbini ze-molecule, enza isakhiwo se-asymmetric hydrophilic kunye ne-oleophilic molecular. Iindidi zayo zezi: i-sodium oleate C17H33COONa, i-carboxylate, i-sulfate (RO-SO3Na), i-sulfonate (R-SO3Na), njl. Ukuhambelana kwee-anionic dispersants kulungile, kwaye ii-polycarboxylic acid polymers, njl. zinokusetyenziswa kwii-solvent-based coatings kwaye zisetyenziswe kakhulu njenge-controlled flocculation-type dispersants.

2. Iarhente yokumanzisa kunye nokusasaza yeCationic
Ziikhompawundi ezitshajiswe kakuhle ezingezizo i-polar base, ikakhulu iityuwa ze-amine, iityuwa ze-quaternary amine, iityuwa ze-pyridinium, njl. Ii-surfactants ze-cationic zinamandla amakhulu okufunxa kwaye zinefuthe elingcono lokusasazeka kwi-carbon black, ii-iron oxides ezahlukeneyo kunye nee-organic pigments, kodwa kufuneka kuqatshelwe ukuba zisabela ngokweekhemikhali kunye neqela le-carboxyl kwisiseko sezinto, kwaye kuqatshelwe nokuba akufuneki zisetyenziswe ngaxeshanye nee-anionic dispersants.

3. I-hyperdispersant yohlobo lwe-free radical elawulwayo
Okwesibini, indima yomsasazi
1.Phucula i-gloss kwaye wonyuse isiphumo sokulinganisa.
2. Thintela umbala odadayo kunye nokudubula kweentyatyambo.
3.Phucula amandla okufaka imibala.
4.Nciphisa i-viscosity kwaye wonyuse umthwalo we-pigment.
5.Nciphisa ukutyibilika, yonyusa ukwakheka kwayo kunye nokusetyenziswa kwayo.
6. Thintela ukurhawuzelela nokwandisa uzinzo lokugcina.
7. Yandisa ukusasazeka kombala kunye nokugcwala kombala.
8. Yandisa ukucaca okanye amandla okugubungela.
9. Ukuphucula ukusebenza kakuhle kokusila kunye nokunciphisa iindleko zemveliso.
10. Ukuthintela ukuqina kwentliziyo.