Abstract:
유기금속화합물(organometallic compound)을 포함하는 주촉매; 및 나노입자(nanoparticle)를 포함하는 조촉매;의 존재 하에, 락타이드를 개환 중합하는 단계를 포함하는 폴리락트산 제조방법, 상기 방법으로 제조된 폴리락트산수지, 상기 수지를 포함하는 수지조성물 및 폴리락트산 제조용 촉매 시스템이 제시된다.
Abstract:
The present invention relates to a method for continuous polymerization of polyester and, more specifically, to a method for continuous polymerization of polyester and to a polymerization reactor applied thereto, the method comprising: obtaining an ester oligomer by performing esterification or trans-esterification; and continuously injecting the ester oligomer in a liquid polymerization reactor to continuously produce polyester polymers in the liquid polymerization reactor.
Abstract:
The present invention relates to a method to manufacture ester oligomer and, more specifically, to a method to manufacture an esterification reaction product with low acidity containing ester oligomer obtained via esterification or trans-esterification; and manufacturing polyester by polymerizing by adding the liquid state of the manufactured esterification reaction product with low acidity.
Abstract:
The present invention relates to a method for preparing esterification reaction products and a method for preparing polyester using esterification reaction products and more specifically, to a method for preparing esterification reaction products in which the content of dipropylene glycol is reduced, and to a method for preparing polyester using the esterification reaction products, in which generation of impurities such as acrolein, aryl alcohol, and the likes is reduced. [Reference numerals] (AA) End; (BB) Example 1; (CC) Example 2