Waxadditives粉态WAX.pdf

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1、CreatingAdditiveValueWaxAdditives07-2015MBWaxAdditives:Agenda:-Waxdefinition-Mechanism&generalpropertiesofwaxes-CERETANWD-SeriesWaxdefinition:Waxisatechnologicalcollectivetermforarangeofnaturallyorsyntheticallyderivedsubstanceswhichhavethefollowingpr

2、opeties:at20°Csolid,consistencyfromsoftandplastictobrittleandhardCoarselytofinelycrystallinestructure,transparenttoopaque–butnotglasslikeMeltingpointabove40°CwithoutdecompositionRelativelowviscosityattemperaturessligthlyabovethemeltingpointVaryg

3、reatlyinconsistencyandsolubilitywithchangingtemperatureMaybepolishedbyrubbingundermoderatepressureIfmorethanoneofthesepropertiesisnotfullfilledbyamaterialthenitisnotawaxinthemeaningofthisdefinition.Overviewwaxes:Mechanismofwaxadditives:Floatingtheor

4、yDistributionofwaxparticlesinthecoatingmatrixBaked/Stovedsystems,dryingtemp.higherthanmeltingpointofwaxSolventevaporates,filmshrinks,waxriseswaxformsathinlayeratthesurfaceMechanismofwaxadditives:FloatingtheoryDryingtemperaturehigherthanmeltingpoint

5、ofwaxesAdvantages:AhighamountofthewaxrisestothesurfaceWaxcreatesathin,homogeneouslayeratthesurfaceNoorlessinfluenceontheglossasthewaxmeltsDisadvantages:MattingofstovedsystemsisdifficultCoarseparticlescancausesurfacedefectsMechanismofwaxadditives

6、:BallbearingtheoryDistributionofwaxparticlesinthecoatingmatrix:Phys.Dryingsystems,dryingtemperaturebelowmeltingpointofwaxIdeallyallparticleslookoutofthesurfacetoprotectthecoatingMechanismofwaxadditives:BallbearingtheoryDryingtemperaturebelowthemelt

7、ingpointofwaxesAdvantages:WaxcanbeusedtosupportthemattingDisadvantage:WaxneedslongertorisetothesurfaceInthicklayersystemsusuallymorewaxisneededSurfacepropertiesofwaxbasedadditives:rnaiosMecareclyc+nybnenhtaitAtaggerceelltcaisilb+isinttinttsstutipF

8、ercsepliobusealaloxeaftopeSRSMRRMFGTHSRWaxbased+PTFESiliconeFluorocarbonSilicateNano-technologySurfacepropertiesofwaxbasedadditives:Slip/COF:UnderSlip/COFweunderstandtheforcewhichisneededtoslidetwosurfacespasteachother.Thelowertheneededforce-thehigh