Brandon L. Hunt Technical Team Leader Kansas SBEAP: Reducing Solvent Emissions Seminar Wichita, KS March 10, 2009 Reducing Solvent Emissions in Liquid Coatings

Why is Solvent in Coatings?  Solubility  Reduces viscosity  Ease of application  Atomization  Potlife  Film formation  Dry time  Sag resistance  Flow/Level

 Low VOC/HAP Technology  Application Technology  Formulation/Process Techniques  Future Trends Avenues to Reducing Emissions

Low VOC/HAP Technology  Waterborne  Comparable durability  Ability for very low VOC  Proper solvents can make HAP-free  Temperature and humidity dependent  Must not be allowed to freeze

Low VOC/HAP Technology  High Solids  Low VOC/HAP levels  Up to 100% solids  Aesthetic limitations to higher solids  Exempt Solvents/Solvent Substitution  Exempt solvents count as VOC in other countries  Exempt reducer can reduce emissions but does not alter the compliance VOC  Few solvents are exempt; limited solubility  Substitute solvents can achieve HAP compliance without significantly changing coating

Low VOC/HAP Technology  Energy Cure (UV/EB)  Part size limitations  Curing equipment investment  Zero VOC

Application Technology  Transfer Efficiency  Electrostatic, HVLP  VOC reduction  Gas carrier

Formulation/Process Techniques  Eliminate Layers  DTM Technology  Eliminate pretreatment or primer  Lower Dry Film Thickness  Topcoat pigmentation  Improved hiding power of pigments  Higher performance resins  Solvent replacement  Extender pigments  Reactive diluents/additives

Future Trends  Eliminate Layers  Self-Stratifying Technology  Eliminate pretreatment or primer  Hybrid Technology  Powder/EB Cure

Other Green Technology  Eliminate Cr (VI)  Chrome Hazard Free Technology  Pretreatments  Primers  Surfacers

Sherwin-Williams Initiatives We believe the optimal green coating should do two things: minimize the impact on air quality and deliver maximum performance. So we've developed the GreenSure symbol to help you identify the products that meet our highest green coating standards. EcoVision is our company-wide commitment to look for and implement ways that reduce our impact on the environment. It's a shared and ongoing vision that all Sherwin- Williams employees can help achieve.

 Websites for further information:  

Thank you!! Acknowledgements: Kenneth Gabele Manager, Sherwin-Williams Regulatory Information Services Heidi Perez-Hernandez Chemist, Sherwin-Williams Aerospace Coatings