Anionic surfactants pigment stabilization

In the manufacture of coating materials, paints, varnishes, lacquers, dyestuff pigments, binding materials, and binders, surfactants are of great importance. Most of the systems used in these fields are dispersed. Therefore surfactants can accelerate the preparations of dispersions and improve their stability. For rewetting processes, like the so-called flush process, besides other anionic surfactants sulfosuccinates are also used. 

FIGURE 17.18 Pigment particles stabilized with anionic surfactants adsorbed on their surfaces. The kinetic stability is ensured by the barrier of energy xKT. If the particles cross over the barrier, they fall into the unstable zone from where, to redisperse them, one would need (x + y)KT of energy. PE = potential energy. 

Uses Foam control agent emulsifier for polar and nonpolar soivs. and textile jet dye carrier applies. spreading agent in pigment printing post-stabilizer in emulsion polymerization intermediate in mfg. of anionics surfactant component in acidic cleaners, aerosols, insecticides and wax emulsions Properties Gardner 2 Iiq. disp. in water dens. 8,4 Ib/gal vise, 410 cs HLB 10,4 cloud pt. < 25 C 100% act. 

U n itex http //www. unitexchemical. com] Dicyclohexyl sodium sulfosuccinate CAS 23386-52-9 EINECS/ELINCS 245-629-3 Synonyms Sodium 1,4-dicyclohexyl sulfobutanedioic acid Sodium 1,4-dicyclohexyl sulfonatosuccinate Sodium dicyclohexyl sulfosuccinate Sodium 1,4-dicyclohexyl sulfosuccinate Succinic acid, sulfo-, 1,4-dicyclohexyl ester, sodium salt Definition Sodium salt of the diester of cyclohexyl alcohol and sulfosuccinic acid Empiricai C16H26O7S Na Properties Anionic Toxicoiogy TSCA listed Uses Dispersant, surfactant, emulsifier for modified S/B post additive to stabilize latex and promote adhesion pigment dispersant surfactant, foaming agent, hydrotrope in cosmetics emulsifier in food pkg. 

Uses Surfactant in wallpaper removers wetting agent for pigments in aq. systems, pigment pastes, gloss emulsion paints dispersant emulsifier for emulsion polymerization, brush cleaners stabilizer for emulsion paints Features Solv.-free good emulsifying properties compat. with anionic, nonionic and cationic surfactants... 

Uses Surfactant, stabilizer, emulsifier for carbon black and pigment disps., paints and coatings, emulsion polymerization, agrochemicals Features Compat. with anionic, cationic and other nonionic surfactants superior wetting action improves colloidal stability Properties Colorless, vise, liq. sol. in water, many polar org. soivs. dens. 1.049 vise. 2050 cP HLB 13-14 pour pt. 15 C pH (as supplied) 7.1 equilibrium surface tens. 32 dynes/cm dynamic surface tens. 49 dynes/cm Draves 20 sec wetting cone. 0.28% 75% act. 

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