1. Waterborne Coatings

2. Waterborne Coating Use
Europe
U.S. Original Equipment Manufacturing
Refinishing
California
Primers
European cars
Eastern U.S. – base-coats
Regulatory driven – air quality
Shops converting from high VOC coating products have challenges
Color matching for U.S. colors
Coating application and drying for best finish quality
Waterborne coatings are being used in Europe for refinishing, but not much here. Some manufacturers are using waterborne coatings. In california most used is for primer and on European cars. The air regulations concerning the VOC content in refinish coatings may change operations, in some air districts. SCAQMD is the first.

3. Advantages Less toxic Lower VOC
Solvent paint may contain xylene, toluene, ethyl benzene, MEK
Waterborne paint may contain glycol ethers, propanol
Lower VOC
Alternative to TBAC and PCBTF to reduce VOC formulation in coatings
May cost less
No additives, reducers
Thin with water if needed
Less reaction with substrate
Longer pot life
Water-based clean-up
Typical paint currently used– xylene, toluene, ethyl benzene, MEK
No additives – don’t need thinner or may need to thin with water

4. Equipment Changes Corrosion resistant spray guns
Drying and curing technology
Spray booths with heat & turbulence
Requires very clean spray booth
Infrared and uv lamps for primer
Job scheduling
Plan for increased drying time
Drying and curing of waterborne paint takes longer. For faster production times, equipment must circulate heated air to

5. Retro-fitted air movement devices for curing and drying
Place in 4 corners of spray booth

7. Regulatory Impacts- Air Quality
CARB adopted suggested control measure (SCM) to improve consistency and enforceability of regulations
Reduce VOC in primer and top coat by 2009
Primer-sealer, single stage coatings by 2010
SCAQMD adopted December 2005
Effective date July 1, 2008, clear and color coats
SJVAPCD proposed – workshops January 2006
Rulemaking updates
SCAQMD rule is a little different

8. Waterborne Coatings Future for refinishing industry
Expect coatings industry to develop more products to meet needs
Shops will need to upgrade spray booth equipment for faster production
Allow time for conversion to waterborne
Manufacturer training for painters
Work with new coatings and equipment in each shop to achieve best results