Polyester having renewable 1,3-propanediol
View Patent ↗The present disclosure is directed to a polyester having renewable 1,3-propanediol. This invention is further directed to a coating composition comprising the polyester having components derived from renewable resources.
1. A polyester prepared from a mixture consisting of bio-derived 1,3-propanediol, pentaerythritol, benzoic acid, neopentyl glycol, isophthalic acid, phthallic anhydride, adipic acid, xylene and ethyl acetate; or prepared from a mixture consisting of bio-derived 1,3-propanediol, pentaerythritol, caprolactone, dimethylol propionic acid, xylene, stannous octoate and methyl amyl ketone.
2. The polyester of claim 1 , wherein the renewable carbon content of said polyester is at least 1% of the total solid weight of the polyester.
3. The polyester of claim 1 wherein the polyester has a weight average molecular weight in the range of from 500 to 5,000, and a Tg in a range of from −75° C. to 75° C.
4. The polyester of claim 1 wherein the polyester has hydroxyl functional groups.