Preparation of styrene–butyl acrylic latex films with impact resistance properties and their applications as water-based damping coating

Abstract

Water-based damping coatings to achieve both low-frequency damping and high-frequency impact protection must be developed. Herein, a series of latexes containing a styrene–butyl acrylate chemical crosslinking framework and a dynamic crosslinking impact hardening polymer are synthesized to fabricate water-based damping coatings. Long-chain-based lauryl methacrylate is used to improve the compatibility of styrene–butyl acrylate and impact hardening polymer (IHP) to prepare a composite film (BSL–IHP). The BSL–IHP film exhibits an excellent low-frequency damping ability. The loss factor (tanδ) of the prepared film is up to 1.54, and the effective damping temperature range can be extended to 80 °C. Further, it exhibits excellent impact-resistance properties at high frequencies. The impact energy absorption efficiency of the BSL–IHP film raises to 76.8 % under high-speed impact. In addition, stress response and superior self-healing properties (efficiency = 93.1 %) can be endowed to the film to realize the combination of low-frequency damping and high-frequency impact protection of water-based damping coating which possesses a wide and bright scope in the future.