Wax Emulsions Emulsion - Sasolwax US

Sasol Wax GmbHBusiness Unit Industrial Waxes

Wax EmulsionsDefinition++WaxWaterEmulsifierEmulsion

Wax EmulsionsDefinitionEmulsion/dispersionFinely dispersed particles in a liquidFinely emulsified liquid within anotherliquid, both not miscible with each otherStabilized by an emulsifier

Wax EmulsionsEmulsionsOil in water (O/W)Water in oil (W/O)Multiple emulsions (O/W/O; W/O/W)O/WO/W/OOWW/OW/O/W

Wax EmulsionsEmulsifierEmulsifiers do like wax and waterHydrophilic part likes waterHydrophobic part likes waxhydrophobic / non - polarhydrophilic / polar

Wax EmulsionsEmulsifierWhen added to water they may ionize+ -- +…or may dissolve without ionizing

Wax EmulsionsEmulsifierAirActive at the boundary layerbetween two mediaWaterWaterOilAnionicCationicNon ionicNon ionic / anionic

Wax EmulsionsEmulsifier systemsEmulsifierPolar groupssystemNon ionic-OH (alcohol)hydrophilichydrophobic-O- (ether)Anionic-COO - (carboxylate)-SO 3-(sulfonate)-OSO 3-(sulfate)Cationic-NH 3+(amine)NR 4+(quat. ammoniumcomp.)-COO - (carboxylate)Amphotere+-NH3 + (amine)

Wax EmulsionsEmulsions+ + H 2 O =-------+ Anionic+ + H 2 O =+++++++-Cationic+ + H 2 O = Non - Ionic

Wax EmulsionsEmulsionThe wax particles…become more hydrophilicrepel each otherdon’t agglomeratestay small enough to preventsedimentation / separation

Wax EmulsionsAnionic EmulsionsGood shear stabilityStable pH>7High solids (65%)Breaking by pH changeUnstable in hard waterTends to foamHydrowax C, M, R

Wax EmulsionsAnionic/non ionic EmulsionsGood shear stabilityStable pH>7High solids (65%)Breaking by pH changeAcid intolerantHydrowax 730, 538

Wax EmulsionsAcid stable EmulsionsHard water stableAcid stableAlkali stableLow foamingModerate shear stabilityMedium solid content (50%)Hydrowax Q, RV, 215, 315, 345

Wax EmulsionsCationic EmulsionsHard water stableHigh solids (60%)Low viscosityGood shear stabilityNot stable pH > 7Hydrowax 46, 638

Wax EmulsionsWax phase – Fully refined paraffinOil content below 1%Colorless whiteBrittle when solidCongealing point 60-65°CFood gradeHydrowax 215, 315

Wax EmulsionsWax phase – Semi refined paraffinOil content below 5%Off white, yellowLess brittle when solidCongealing point 50-60°CNo food gradeHydrowax C, 46, 538, 638, RV

Wax EmulsionsWax phase – Micro waxOff white, pale yellowElastic and flexibleStickyFine structureCongealing point 60-75°CHydrowax 215, M, Q

Wax EmulsionsWax phase – Bright stock oilFlash point above 280°CViscosity 500 mm 2 /s at 40°CSulphur 1-2%Hydrowax 88

Wax EmulsionsProduction1. Blending wax and water2. Circulate pre-emulsion through homogenizer for a given time3. Homogenizing and cooling below melting point of wax

Wax EmulsionsApplications – Ceramics, abrasivesAct as mould release agentsImprove plasticity of slipImprove fluidity of slip or press powdersProvide green strength (temporary binding agent)Hydrowax Q, C

Wax EmulsionsApplications – Paper and boardSizing agent (press and internal)Anti lintingSurface modifying (opacity,printability, slippiness, brightness)Hydrophobing agentHydrowax RV, 46, 345, 638, 215

Wax EmulsionsApplications – Timber treatmentSpray or brush (pure or diluted)Reduce evaporation on cutting areas- fewer cracksSeals cutting areasProtects against microorganisms and oxidationpreserves original colorsHydrowax M, (R, 345)

Wax EmulsionsApplications – ConcreteAs a layer on fresh concrete (e.g. roads, bridges)- regulates evaporation: hardness of ready concreteSealingHydrophobing agentHydrowax Q, 730, 46, 638

Wax EmulsionsApplications – Rock wool, glass woolAs a component in the binder material it is mixedtogether with resins and silanesReduces dust in productionImportant: flash point of the oilHydrowax 88

Wax EmulsionsApplications - HandlingCritical IssuesExtremes of temperatureContamination/dilutionEvaporation/foamingShear stress

Wax EmulsionsApplications - HandlingCritical IssuesExtremes of temperatureAvoid freezing or heating above melting of waxContamination/dilutionEvaporation/foamingShear stress

Wax EmulsionsApplications - HandlingCritical IssuesExtremes of temperatureContamination/dilutionDilute with soft water only if necessary, add water to theemulsion, don’t store diluted emulsionEvaporation/foamingShear stress

Wax EmulsionsApplications - HandlingCritical IssuesExtremes of temperatureContamination/dilutionEvaporation/foamingStir gently, foam dries and forms wax particles, sealstocks carefullyShear stress

Wax EmulsionsApplications - HandlingCritical IssuesExtremes of temperatureContamination/dilutionEvaporation/foamingShear stressAvoid shear that breaks emulsionpump, meter and mix gently

Contact Industrial WaxesSasol Wax GmbHWorthdamm 13-2720457 HamburgGermanyPhone: +49 (40) 78 115 772/784Fax: +49 (40) 78 115 788www.sasolwax.comindustrial.waxes@de.sasol.com