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Physical Properties of Primerless Waterborne Paint for Composite Polypropylene in Instrument Panel
Published May 01, 2006 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
Physical and chemical properties of primerless waterborne paint for composite polypropylene instrument panel were investigated. Primerless waterborne paint with 30% of polyolefin-modified acryl emulsion, 15% of alkyl methacrylate emulsion, 3% of crosslinked polymethacrylate bead, 2% of amide-modified polyethylene wax had good adhesion properties onto polypropylene substrate without adhesion promoter and showed better properties on long-term reliability test. In production line test, IR curing condition was insufficient for waterborne paint due to high latent heat of evaporation and complicated feature of instrument panel. Waterborne primerless paint was sensitive to painting environment compared with solvent-borne paint.