Resorcinol based aromatic polyesters exhibit a rigid aromatic backbone, high refractive index and high glass transition temperatures (Tg) which are important factors for polymer processability. These polyesters are typically synthesized via solution or interfacial polymerization, involving controlled mole fractions of diacid chlorides and resorcinol in the presence of a catalyst. The molecular design of resorcinol-based polyester affects solubility, compatibility, thermal stability, and UV absorbance of final polymer, which are critical for tailoring material performance. Upon UV exposure, these polyarylates undergo a photo-Fries rearrangement and form o-hydroxybenzophenone derivatives that act as self-renewing UV absorbing layers. In this study, various aliphatic diols were introduced to the solution polymerization of resorcinol based polyesters to enhance chain flexibility while maintaining desirable UV absorption. The effect of aromatic to aliphatic diol ratio on the molecular weight (Mn, Mw, PDI), glass transition temperature and UV absorbance of final polymer will be investigated. The chemical structure of final polymers will be characterized by 1H nuclear magnetic resonance (NMR) and Fourier-transform infrared spectroscopy (FTIR). Differential scanning calorimetry (DSC) and gel permeation chromatography (GPC) were performed to evaluate behavior of these polymers as protective UV resistant coatings.