摘要:
A process is disclosed wherein ricinoleic acid from petroleum alternative vegetable castor oil that has a hydroxyl group at the 12-position or a derivative thereof (an ester or a hydrogenated compound thereof) is polymerized in the presence of a synthetic zeolite and an immobilized lipase at around normal temperature without using any harmful polymerization catalysts or organic solvents which can cause environmental pollution whereby a polyester useful in the industry that has a weight average molecular weight of 20,000 or more is obtained. This high-molecular weight polyester is crosslinked to give a crosslinked elastomers that is comparable to synthetic rubbers.
摘要:
Manufacture, at a high yield, a new, biodegradable 12-hydroxy acid copolymer being a non-petroleum material and contributing to prevention of environmental pollution and global warming, from materials that include 12-hydroxystearic acid or derivative thereof obtained by hydrogenating ricinoleic acid which in turn is obtained from castor oil, as well as long-chain hydroxy acid that can be synthesized from plant-based seed oil, by using an immobilized lipase as a catalyst.