A novel powder coating manufacturing process has been developed based on the advanced supercritical fluid technology for material processing. The new process developed has several advantages over the conventional technology, viz.:
- no need for extrusion or melt processing for ingredient mixing
- no need for or alleviation of dusty and energy-intensive size classification
- better compatibilization between resin and ingredients
- single train possibility
- lower temperature blending, thus ensuring no precuring of materials
- better pigment dispersion, thus ensuring excellent color match, resulting in cost saving
- better control of molecular weight distribution of resins (ideal for powder coatings) by a proprietary polymer synthesis process
- excellent color match capability
- small batch capability
- environmentally friendly
- applicable to a variety of polymeric resins as base resins including acrylics, polyester, epoxy, etc.
- producing higher quality coatings
Key U.S. patents were issued.
- S. Lee et al., "Polymerization, Compatibilized Blending, and Particle Size Control of Powder Coatings in a Supercritical Fluid", U.S. Patent No. 6,340,722 (issued January 22, 2002).
- S. Lee et al., "Polymerization, Compatibilized Blending, and Particle Size Control of Powder Coatings in a Supercritical Fluid", U.S. Patent No. 6,849,678 (issued February 1, 2005).
This process technology is available for licensing through the Temarex Corporation, a technology transfer company for the University of Akron. If interested in developing advanced polymer materials and/or their specialty applications, please contact us for University R & D.