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Flax oil is the main goal of growing flaxseed. Flax oil has been used for nutrition, food, paint binder, putty, and wood finish. However, synthetic resin from flax oil has not been developed. In this paper we will develop a biopolymer derived from flax oil and the goal is to use it as a resin to produce a viable, biodegradable composite using natural fiber as reinforcement. First, the functionalization of the triglyceride group of the flax oil fatty acids with polymerizable chemical groups was studied. The triglyceride molecule of flax oil was epoxidized by the reaction of double bonds in the fatty acid with a peroxy acid (formic acid) to get epoxidized oil; the epoxidized oil was then reacted with ethylenically substituted carboxylic acid (acrylic acid) to form acrylated epoxidized flax oil. Polymer resins were prepared from flax oil by blending acrylated epoxidized flax oil with styrene and a free radical initiator.