A Latex IPN (Interpenetrating Polymer Network) Coating System for Damping Noise and Vibrations over a Broad Temperature Range
LEHIGH UNIV BETHLEHEM PA MATERIALS RESEARCH CENTER
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Based on the principles of constrained layer damping, Silent Paint is a two-layer coating system capable of attenuating noise and vibration over a broad temperature range. The damping undercoat layer is composed primarily of a methacrylicacrylic semi-compatible inter-penetrating polymer network IPN in latex form, with thickeners and preservative added. The constraining overcoat layer is based on a reinforced epoxy resin, and exhibits great stiffness. The total system, exhibiting significant damping behavior from -30 deg C to over 70 deg C, used in the form of coatings permits easy application on arbitrary substrate configurations. The synthesis of the latex IPN is summarized, and the mechanical and damping behavior of the new coating system is compared to several materials intended for use as noise and vibration damping products.
- Coatings, Colorants and Finishes