Browse Publications Technical Papers 2007-01-3738
2007-08-05

Physical Properties of Primerless Waterborne Paint for Composite Polypropylene in Instrument Panel 2007-01-3738

In this study, for the composite polypropylene in instrument panel, mechanical and chemical properties of primer-less waterborne paint is investigated by formulations of paint composition and material properties according to process conditions are also investigated. Primer-less waterborne paint with 30% of polyolefin modified acryl emulsion, 15% of alkyl methacrylate emulsion, 3% of cross-linked 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 primer-less paint was sensitive to painting environment compared with solvent-borne paint. Also, primer-less waterborne paint can reduce the primer process and emission of TVOC and formaldehyde which cause the New car syndrome these days. This primer-less waterborne paint can decrease odor problem which is the main problem of solvent-borne paint and get excellent coating properties such as adhesion, pencil scratch resistance, chemical resistance.

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