The present disclosure is directed to a radiation curable coating composition comprising low molecular weight polytrimethylene ether glycol. This disclosure is further directed to an antimicrobial coating layer formed from the coating composition comprising low molecular weight polytrimethylene ether glycol. The coating compositions can be used as interior and exterior top coats, basecoats, primers, primer surfacers and primer fillers. The disclosure is particularly directed to a coating composition comprising components derived from renewable resources.
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