Sustainably Produced Bio-based 1,4-Butanediol—Fermentation from Renewable Sugar (e.g. Dextrose), Recovery, Purification (including Distillation) from By-Products, and Uses as an Interchangeable Substitute for Petroleum-derived 1,4-butanediol in Making Polyesters and other Polymers
Publication Date: 2013-May-31
The IP.com Prior Art Database
Bio-based 1,4-butanediol (bio-BDO), produced by fermentation on dextrose sugars, was produced at high purity (greater than 98.6%), colorless, with no or relatively low levels of impurities, particularly nitrogen compounds, GBL, aldehydes and ketones. This bio-BDO was successfully used to generate polyesters, including polybutylene terephthalate (PBT), in reactions previously used with petroleum-derived 1,4-butanediol (petro-derived BDO). Bio-BDO finds use as a raw material drop-in in any of the many uses known for petro-derived BDO, including reactions with diols, diacids and/or di-isocyanates to make polymers including polyester, PBT, aliphatic polyesters, polybutylene succinate (PBS), polyurethane, thermoplastic copolyester elastomers, plastics and biodegradable plastics and their use to make products including molded articles, films, fibers and parts for automotive, electrical, water systems and small appliance applications. The polymers are further enhanced by polymer blending (e.g. polyester ethers (COPE)) and/or by modifying with fillers, reinforcing-agents, coloring-agents, UV-resistance agents, etc. Bio-BDO is also chemical converted to tetrahydrofuran (THF) to make polymers including polytetramethylene ether glycol (PTMEG) used to make spandex fibers and COPE, and to gamma-butyrolactone (GBL).