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:
Feb. 25, 2020
Filed:
Oct. 31, 2017
National Tsing Hua University, Hsinchu, TW;
Chang Chun Plastics Co., Ltd., Taipei, TW;
Chang Chun Petrochemical Co., Ltd., Taipei, TW;
David S. H. Wong, Hsinchu, TW;
Kan-Nan Chan, Taipei, TW;
Ping-Lin Yang, Hsinchu, TW;
An-Pang Tu, Taipei, TW;
En-Ko Lee, Hsinchu, TW;
National Tsing Hua University, Hsinchu, TW;
Chang Chun Plastics Co., Ltd., Taipei, TW;
Chang Chun Petrochemical Co., Ltd., Taipei, TW;
Abstract
A preparation method of a polyurethane resin including the following steps is provided. A liquid polyamine compound is placed in a continuous reaction system, and the liquid polyamine compound is circulated in the continuous reaction system. A solid bis(cyclic carbonate) and a solid catalyst are placed in the continuous reaction system to mix the solid bis(cyclic carbonate), solid catalyst, and liquid polyamine compound to form a heterogeneous mixture. The heterogeneous mixture is heated in the continuous reaction system in a microwave manner, such that the heterogeneous mixture reacts to form a polyurethane resin.