**Thien Vuong Nguyen 1,2,\*, Tuan Anh Nguyen <sup>1</sup> and Thi Hau Nguyen <sup>3</sup>**


Received: 28 January 2020; Accepted: 24 February 2020; Published: 26 February 2020

**Abstract:** This study aims to evaluate the synergical effects of SiO2 nanoparticles (nano-SiO2) and organic photostabilizers (Tinuvin 384 (T384) and Tinuvin 292 (T292)) on the weathering resistance of acrylic polyurethane coating. Data obtained from infrared (IR), field emission scanning electron microscopy (FESEM), and weight loss of coatings (before and after aging test), suggest that the SiO2 nanoparticles play a dual role, as both reinforcer and UV absorber, thus improving effectively both the mechanical properties and the weathering resistance of polyurethane acrylic coatings. The nanocomposite coating containing 2 wt % nano-SiO2, 2 wt % T384, and 1 wt % T292 exhibits excellent weathering and abrasion resistances, offering a durable outdoor application.

**Keywords:** acrylic polyurethane coating; nanocomposite; nano-SiO2; mechanical properties; weathering resistance
