The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2019
Filed:
Dec. 08, 2015
Lg Chem, Ltd., Seoul, KR;
Jung Min Sohn, Daejeon, KR;
Seung Young Park, Daejeon, KR;
Jin Woo Lee, Daejeon, KR;
Yoon Jung Kim, Daejeon, KR;
Taek Jun Jung, Daejeon, KR;
Yun Ki Cho, Daejeon, KR;
Yong Hee An, Daejeon, KR;
Jun Wye Lee, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
A method of preparing a polyalkylene carbonate resin is provided. More particularly, a method of preparing a polyalkylene carbonate resin capable of preventing polymer degradation and improving physical properties and quality of a final resin product, in which, after polymerization of polyalkylene carbonate, by-products are removed by using a large amount of water to purify a reaction mixture, and in a subsequence process of removing a catalyst residue, a primary purification method is conducted by using a filter so that a content of the catalyst in the reaction mixture is less than 1% by weight, is provided.