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1、LightStabilizersforwoodandwoodcoatingsCibaSpecialtyChemicalsJanuary2004BusinessLineCoatingsWood:acommonlyusedmaterial-naturallyrenewableresource-considerableimportanceineconomy-easilyavailableandworkablematerial-excellentproperties,strength,lowweight-verylargechoice
2、inspeciesandqualitiesBusinessLineCoatingsWoodapplicationsConstructionelements(bulkwood)Flooring,Furniture,VeneersParticleandfiberboards(HDF,MDF)WPCWoodPlasticCompositesBusinessLineCoatingsWoodspeciesAhornEscheBucheBirkeFichteTanneEdelkastanieEicheMapleAshBeechBirchS
3、pruceFirSweetchestnutOakPlataneRotholzMahagoniKirscheNussbaumTeakMooreicheEbenholzSycamoreRedwoodMahoganyCherryWalnutTeakBogoakEbonyBusinessLineCoatingsWoodcoatingtypes•Furniture,flooringandpanelling(factoryappliedsystems)-NClacquers-Alkyd/Phenol-orUreaFormaldehydea
4、cidcatalysessystems-Polyurethanes-Polyesters(thermalcuring)-UVcurableAcrylateandPESsystems(100%liquid,wbandpowder)-Waterbornedispersions(acrylatesandpolyurethanes)•Exteriorcoatings(professionalandDIYsystems)-Oils,longoilalkyds,2packpolyurethanes-waterborneacrylics,p
5、olyurethanes,alkydemulsionsBusinessLineCoatingsSubstratesandcoatingsselectionSubstrates-largeselectionofspecies,colorsandpatterns-complexwoodchemistry-mostspeciesaresensitivetolightexposureanddegradePhotostabilityrequirementsforclearcoatedsubstrates-maydifferwidelyd
6、ependingonfinalapplication-onlycolorstabilityandaestheticsneededforindoorapplications-coatingdurabilityandsubstratephotoprotectionmustbeguaranteedforlonglastingprotectivecoatingsinoutdoorapplicationsàoptimallightstabilizationmustbecarefullyselectedaccordingtoperform
7、ancerequiredbyenduseBusinessLineCoatingsWoodchemistry-cellulose•majorcomponentofwoodiscellulose–Highmolecularweightlinearpolymer–1tomorethan4b-linkedD-Glucosemonomers–Celluloseisarrangedintoorderedstrandscalledfibrils–Jute,flax,hemp,cotton>90%–Conifers,broad-leafedt
8、rees40to50%OHbCH2OHOH4CH2OHHOOHOObO1OOOOHOHObOOHOOH1CH2OHbCH2OHD-Glucoseb-1,4-GlucancelluloseBusinessLineCoatingsWoodchemistry-hemicellulo
