发明授权
US5142023A Continuous process for manufacture of lactide polymers with controlled optical purity 失效
用于制造具有受控光学纯度的丙交酯聚合物的连续方法

Continuous process for manufacture of lactide polymers with controlled
optical purity
摘要:
A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.
公开/授权文献
信息查询
0/0