What is Oxylink - Quartz Presentations Online
What is Oxylink - Quartz Presentations Online
What is Oxylink - Quartz Presentations Online
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Nanotechnologymakes green coatingsgo aheadDetlef Burgard, Steffen Pilotek, MarcHerold and Klaus SteingröverBühler PARTEC GmbH
Outline1. How to make coatings greener?2. Limitations of waterborne coatings3. Nanoparticles as performance additives for waterborne coatingsa. <strong>What</strong> do we need to make them work?b. <strong>What</strong> <strong>is</strong> the basic technology & manufacturing process fornanod<strong>is</strong>persions?c. <strong>What</strong> <strong>is</strong> <strong>Oxylink</strong>?d. How does <strong>Oxylink</strong> work?e. <strong>What</strong> are the benefits?f. Where can it be applied?4. Conclusion2 | © Bühler | APCS 2010, Burgard, King
Issues for Solvent and Water Based Coatings – how tobecome “GREEN” ?GOVERNMENT LEGISLATIONINDUSTRY TARGETS• SED: Solvent Em<strong>is</strong>sion Directive- Directive 99/13/EC in force from 31-10-2005- Em<strong>is</strong>sion control tightened from 31-10-2007- Directive 2004/42/CE in force from 01-01-2007• NEC: National Em<strong>is</strong>sion Ceiling- National Em<strong>is</strong>sion Ceiling fixed from 2010- NECs tightened up to 2020• CAFE: Clean Air For Europe- Clean Air For Europe - thematic strategy due July2005- EC data (IIASA Report) suggests large reductionbeyond SED• World wide regulations have the potential to reduceVOC by about 4 Mt/a *Source: SpecialChem - Jun 1, 20093 | © Bühler | APCS 2010, Burgard, King
Water borne coatings are “GREEN” but they have somelimitations…• not res<strong>is</strong>tant against mo<strong>is</strong>ture• not stable against chemical attack• not blocking res<strong>is</strong>tant• difficult to process• hard to dry• generally of lower quality than solvent borne alternatives• …• A lot of these arguments are based on preconception, but there <strong>is</strong> also sometruth• There <strong>is</strong> a continous need to improve the performance of waterborne coatings4 | © Bühler | APCS 2010, Burgard, King
Ready to use nanod<strong>is</strong>persions nedded in first placeSurface modification of nanoparticles ensurescompatibility to solvent, formulation and resinCHOCHCOOHOOHC n H 2n+1LNH 2L = complexingligandTailored properties by reaction with reactive surface -OH groupshydrophobic / hydrophilic, acidic / alkaline; ζ - potential, polymerizable, etc.5 | © Bühler | APCS 2010, Burgard, King
D<strong>is</strong>persions of surface modified nanoparticles: Production byChemomechanical processing & = Know-How PackageChem<strong>is</strong>try:SurfaceModificationSdAgglomerated nanoparticles,Incompatible with matrix andprocessingAgitator Bead MillProcess:Comminutionand D<strong>is</strong>persionDe-agglomerated nanoparticles,surface modifiedand compatible with matrixand processing (tailor-made)6 | © Bühler | APCS 2010, Burgard, King
<strong>What</strong> <strong>is</strong> <strong>Oxylink</strong> TM ?ZnO containing mixture of nano particles in aqueous d<strong>is</strong>persionSolid content: 40 wt.%*Density: 1.5 g/ml*V<strong>is</strong>cosity: 4 mPas*pH: 8.5*Particle size d<strong>is</strong>tribution**: typical values, no specifications7 | © Bühler | APCS 2010, Burgard, King
<strong>Oxylink</strong> nanoparticles lead to increased cross linkingFilm formation without and with <strong>Oxylink</strong> nanoparticles*Stable d<strong>is</strong>persion:• droplets of resin in water• droplets carry reactive groupsApplication and drying:• water evaporates• resin droplets stack• physical drying(no chemical bonding)Coalescence:• resin droplets merge• continuous film formsresin droplet:polymer chain• <strong>Oxylink</strong> nanoparticlesare stabilized incoating formulation• nanoparticles connectreactive groups• higher network densityresults in increasedchemical res<strong>is</strong>tanceH 2 NOCOOHCH CH 2<strong>Oxylink</strong>nanoparticleCOOOCO* Educated guess. Exact mechan<strong>is</strong>m waits to be explained scientifically.Source: Team working hypothes<strong>is</strong>.8 | © Bühler | APCS 2010, Burgard, King
WOODCOATINGS - Starting point formulationsEXTERIOR TRANSLUCENT HIGH BUILD STAINBASED ON PRIMAL AC-337 ER (HBST)EXTERIOR TRANSPARENT WOOD GLAZINGBASED ON WORLEECRYL 7461 (WG)IncredientsgIncredientsgPrimal AC-337 ER * 1 (45.5%) 655.1TegoFoamex * 2 825 2Water 100.8Texanol * 3 23.1Aqueous ammonia (28%) 2.7Water 201.6OXYLINK TM * 4 6.95Acrysol RM-12W * 1 (19%) 6.75Water 1Worleecryl 7461 *5 762water 166Dow Corning Add. 65 02water:Ethylen glycol 1:1 42Acrysol RM 5000 *1 3Dow Corning Add. 57 *6 5OXYLINK TM*4 11water 9*1 Rohm & Haas, USA *2 Evonik Tego Chemie GmbH, Germany *3 Eastman Chemicals ltd, UK *4 Bühler PARTEC, Germany*5 Worlée-Chemie GmbH, Germany *6 Dow Corning, USA9 | © Bühler | APCS 2010, Burgard, King
WOODCOATINGS - Not only MEK, but also IPA res<strong>is</strong>tancesignificantly improved<strong>Oxylink</strong> TM concentration: 0.9 wt.% (solids/solids)End point detection: coating destroyed<strong>Oxylink</strong> TM concentration: 0.9 wt.% (solids/solids)End point detection: Starting of gloss declinewith <strong>Oxylink</strong>without <strong>Oxylink</strong>Solvent double rubs16014012010080604020MEKIPAsolvent double rubs252015105MEKIPA0WGHBSTWGHBST0WGHBSTWGHBST10 | © Bühler | APCS 2010, Burgard, King
WOODCOATINGS - Accelerated drying: Faster processingmeans higher productivity<strong>Oxylink</strong> TM concentration: 0.9 wt.% (solids/solids)Time to drying stage 4 (= overworkable) significantly reduced6050without <strong>Oxylink</strong>with <strong>Oxylink</strong>Drying time (hrs)403020100WGHBST11 | © Bühler | APCS 2010, Burgard, King
WOODCOATINGS - Faster processing and broaderapplication through improved blocking res<strong>is</strong>tance<strong>Oxylink</strong> TM concentration: 0.9 wt.% (solids/solids)According to “Richtlinie 6, IFT Rosenheim” (0 = best; 5 = worst)5HBST with <strong>Oxylink</strong>HBST without <strong>Oxylink</strong>4Blocking rating3210Humidity wood Humidity plastic Temperature wood Temperature plastic12 | © Bühler | APCS 2010, Burgard, King
WOODCOATINGS - Overall properties significantly improvedEXTERIOR TRANSPARENT WOOD GLAZING BASED ON WORLEECRYL 7461 (WG)WGWith<strong>Oxylink</strong>Without<strong>Oxylink</strong>Drying time (tack free)100Drying time 100 58,8Gloss retentionsolvent rub, MEK80Blocking res<strong>is</strong>tanceGloss (60°) 98,5 1006040Gloss retention IPA rub 100 45,5Gloss retention MEK rub 100 15,4MEK double rubres<strong>is</strong>tance200Water permeationBlocking res<strong>is</strong>tance 100 100Adhesion (Crosscut, tape) 100 100MEK double rub 100 27,3Gloss retentionsolvent rub, IPAAdhesion(Crosscut, tape)Water permeation 94,7 100Average 99.2 68.4Gloss (60°)without <strong>Oxylink</strong>with <strong>Oxylink</strong>13 | © Bühler | | | APCS 2010, Burgard, King
WOODCOATINGS - Overall properties significantly improvedEXTERIOR TRANSLUCENT HIGH BUILD STAIN BASED ON PRIMAL AC-337 ER (HBST)HBSTWith Without<strong>Oxylink</strong> <strong>Oxylink</strong>Drying time 100 41,7Blocking res<strong>is</strong>tanceDrying time (tack free)10080Abrasion res<strong>is</strong>tanceGloss (60°) 100 98,860Gloss retention IPA rub 100 40,9Gloss retentionsolvent rub, IPA4020Gloss (60°)Blocking res<strong>is</strong>tance 100 200Abrasion res<strong>is</strong>tance 100 81,2Adhesion (Crosscut, tape) 100 100MEK double rubres<strong>is</strong>tanceAdhesion(Crosscut, tape)MEK double rub 100 34,4IPA double rub 100 82,1Water permeation 100 94,7IPA double rubres<strong>is</strong>tancewithout <strong>Oxylink</strong>Water permeationwith <strong>Oxylink</strong>Average 100 6614 | © Bühler | | | APCS 2010, Burgard, King
METAL COATINGS -Three waterborne systems wereexamined by an independend institute (ILF)• Acronal® S 760, (BASF) two coat builtup (primer + topcoat)• self-crosslinking styrene acrylic latex• White pigmented coating• Neocryl® XK-86 (DSM NeoResins+)DTM metal coating• Acrylic styrene copolymer emulsion• White pigmented coating• One coat system• PC-Mull AC 16-2 (Posichem)DTM metal coating• Pure acrylic copolymer• Red pigmented coating• One coat system15 | © Bühler | APCS 2010, Burgard, King
METAL COATINGS – Acronal Self crosslinking styreneacrylate coating can significantly be improved by <strong>Oxylink</strong>without<strong>Oxylink</strong>with<strong>Oxylink</strong>MEK double rub 28,3 100IPA double rub 66,7 100Chemical res<strong>is</strong>tance 92,0 100Adhesion 100 100Drying time 100 100Gloss 100 93,3Corrosion protection(salt spray test) 100 100Weatheringres<strong>is</strong>tance 80,0 100Humidity res<strong>is</strong>tance 28,7 100Average 77,3 99,3Humidityres<strong>is</strong>tanceWeatheringres<strong>is</strong>tanceCorrosion protection(salt spray test)GlossMEK double rub100806040200without <strong>Oxylink</strong>with <strong>Oxylink</strong>IPA double rubChemicalres<strong>is</strong>tanceAdhesionDrying time16 | © Bühler | | | APCS 2010, Burgard, King
METAL COATINGS -Neocryl Acrylic styrene copolymer DTMcoating can significantly be improved by <strong>Oxylink</strong>without<strong>Oxylink</strong>with<strong>Oxylink</strong>MEK double rub 22,9 100IPA double rub 60,2 100Chemical res<strong>is</strong>tance 82,3 100Adhesion 100 100Drying time 100 100Gloss 100 97,8Corrosion protection(salt spray test) 88,9 100Weatheringres<strong>is</strong>tance 71,4 100Humidity res<strong>is</strong>tance 0,0 100Average 69,5 99,8Humidityres<strong>is</strong>tanceWeatheringres<strong>is</strong>tanceCorrosion protection(salt spray test)MEK double rub10080IPA double rub604020Chemicalres<strong>is</strong>tance0AdhesionGlossDrying timewithout <strong>Oxylink</strong>with <strong>Oxylink</strong>17 | © Bühler | | | APCS 2010, Burgard, King
METAL COATINGS - Significant improvement of humidityres<strong>is</strong>tanceWith <strong>Oxylink</strong>Without <strong>Oxylink</strong>Condensed humidity CH, 300 h; DIN EN ISO 6270-2, DIN EN ISO 462818 | © Bühler | | | APCS 2010, Burgard, King
METAL COATINGS -PC-Mull AC 16-2 DTM coating cansignificantly be improved by <strong>Oxylink</strong>MEK double rubPC MullWithWithout100<strong>Oxylink</strong> <strong>Oxylink</strong>Drying time 100 87Corrosion protection(salt spray test)8060IPA double rubMEK double rub 100 304020IPA double rub 100 95Humidity res<strong>is</strong>tance 100 74Humidity res<strong>is</strong>tance(300 h)0Adhesion(cross cut)Corrosion protection 100 32Adhesion (Crosscut, tape) 100 100Weathering res<strong>is</strong>tance 100 100Drying timeWeatheringres<strong>is</strong>tance(1000 h)Leveling 100 100LevelingAverage 100 77without <strong>Oxylink</strong>with <strong>Oxylink</strong>19 | © Bühler | APCS 2010, Burgard, King
METAL COATINGS -PC-Mull AC 16-2 DTM coating cansignificantly be improved by <strong>Oxylink</strong>Color retention100MEK double rub100806040Corrosion protection(salt spray test)8060IPA double rub2040020Humidity res<strong>is</strong>tance(300 h)0Adhesion(cross cut)Bl<strong>is</strong>teringGloss retentionDrying timeWeatheringres<strong>is</strong>tance(1000 h)without <strong>Oxylink</strong>with <strong>Oxylink</strong>Leveling20 | © Bühler | APCS 2010, Burgard, King
PLASTIC COATING - Metallic coating formulation- Starting point formulation for first <strong>Oxylink</strong> testsPigment pasteIngr./gWater 59.1D<strong>is</strong>solve D<strong>is</strong>perbyk 192 1.5Stapa Hydrolan IL 161, add while stirring 39.4Halox SZP 391 add while mixing 1.18Halox 515 add while mixing 1.18Diethylene glycol monobutylether add while mixing 0.788Let sit over nightHomogenize with rotor stator device for 5 minFinal coating E-700-HaloxWater 15.75Ethylene glycolglycol-monobutylether 29Diethylenglycolglycol monobutylether 7.5Dowanol DPM, Dipropylene glycol monomethylether 7.5Mix ingredients and adjust pH to 9.0 with 2-Amino-2-Methylpropanol (AMP)Add pH=9 mixture to Neocryl A 662 while stirring 125Byk 346, add while stirring 0.75Drewplus SG-4552, add while stirring 1.25Pigment paste, add slowly while stirring 37.521 | © Bühler | | | APCS 2010, Burgard, King
PLASTIC COATINGS - high temperature blocking <strong>is</strong> improvedby <strong>Oxylink</strong>5Blocking at 50 °C4321• Drying conditions:• Temperature: 22 °C• Drying time: 48 hrs• following the supplier‘srecommendations• Blocking test:• Temperature: 50 °C• Load: 2.5 kg/25 cm²00 1 2 3wt.% <strong>Oxylink</strong>22 | © Bühler | | | APCS 2010, Burgard, King
PLASTIC COATINGS - Very strong synergy between <strong>Oxylink</strong>and PTFE wax: No blocking after very short drying time5• Drying time 3 hrs instead of 48 hrs0 = best5 = worst4Blocking32100 % <strong>Oxylink</strong>31021 % <strong>Oxylink</strong>31022 % <strong>Oxylink</strong>31023 % <strong>Oxylink</strong>31022 % <strong>Oxylink</strong>3102 +0.025 %PTFE wax0.025 %PTFE wax0.05 %PTFE wax• Dried at 22 °C & Blocking test was done at 22 °C23 | © Bühler | | | APCS 2010, Burgard, King
PLASTIC COATINGS - Samples after blocking test<strong>Oxylink</strong> &Wax02% <strong>Oxylink</strong> Only4Control53%<strong>Oxylink</strong> Only4Wax OnlyWax only1% <strong>Oxylink</strong> Only5550 No v<strong>is</strong>ible change, no sticking1 Slight sticking, no damage2 Sticking, stains slightly v<strong>is</strong>ible3 Blocking, film damaged, nodelamination4 Blocking, slight delamination5 Full blocking, servere delamination24 | © Bühler | | | APCS 2010, Burgard, King
CONCRETE COATINGS - First results indicate that <strong>Oxylink</strong>can significantly improve dirt pick up res<strong>is</strong>tance100without <strong>Oxylink</strong>with <strong>Oxylink</strong>with<strong>Oxylink</strong>without<strong>Oxylink</strong>Performance80604020025 | © Bühler | APCS 2010, Burgard, King
Conclusion• <strong>Oxylink</strong> TM can significantly improve the overall properties of waterborne coatings• The positive effects seem to be independend from the substrate: Coatings onwood, metal, plastics and concrete can significantly be improved• The gap between waterbornes and solvent borne coatings becomes narrowerand the hurdles for waterbornes become lower• As a consequence, nanotechnology can play an important role in bringinggreener coatings forward26 | © Bühler | APCS 2010, Burgard, King
Contacts for <strong>Oxylink</strong> TM• Malaysia & Singapore CRS Technologies Sdn. Bhdclement@crs-asia.com• Philippines & Indonesia AceAdvertrade Sdn Bhddoreen@aceadvertrade.com• Thailand Micron<strong>is</strong>ers (Thailand) Co. Ltd.seubphong.micron<strong>is</strong>ers@mcic.co.th• Vietnam Vien Thien Industrial Supplies Joint Stock Co.tuyetvt@vit<strong>is</strong>co.com• PR China & Taiwan Pro Chuen Trading Companyjoseph@prochuen.com• Australia & NZ Micron<strong>is</strong>ers Australasia Pty Ltdkenking@micron<strong>is</strong>ers.com• Europe & USA Buhler PARTEC GmbHdetlef.burgard@buhlergroup.com27 | © Bühler | APCS 2010, Burgard, King
28 | © Bühler | 28 | 20.05.2009 |Dr. Detlef Burgard, Bühler PARTEC | © Bühler
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