Patent ID: 8207372

Claim:
A process for making a (meth)acrylic acid ester of a polytrimethylene ether glycol comprising: a) polycondensation of hydroxyl groups-containing monomers predominantly comprising 1,3-propanediol obtained biochemically from a renewable source in the presence of acid catalyst at temperatures between 100 to 250° C. to form a poly(trimethylene ether) glycol, b) esterifying the obtained poly(trimethylene ether) glycol with an acrylic compound in the presence of a polymerization inhibitor(s) and optionally a solvent at temperatures between 25 to 250° C., wherein the (meth)acrylic acid ester of a polytrimethylene ether glycol is a mixture of mono and diesters of poly(trimethylene ether) glycol.