http://www.synbioproject.tech/cpi/applications/polybutylene-succinate/
Polybutylene succinate is a polyester derived from the reaction of certain alcohols with succinic acid. Its applications range from single-use in food service ware, including cutlery, cups and lids, agricultural mulching film and compostable bags. PBS can also be made into composites by filling the fibers with other materials to augment the material properties of the substance and thereby diversify the potential applications. Source
Succinic acid can be reacted with different alcohols to produce polyesters. Polybutylene succinate, or PBS, is one such polyester. PBS is a biodegradable polymer made by reacting succinic acid with 1,4-butanediol. BioAmber bio-based succinic acid enables PBS to be lower cost and partially renewable, and upon commercialization, it is expected that bio-based 1,4-butanediol will enable PBS to be 100% bio-based. Myriant's bio-succinic acid is a true drop-in replacement for petroleum-based succinic acid, enabling manufacturers to produce a truly bio-based, biodegradable polymer. Source