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:
Jun. 24, 2025
Filed:
Nov. 05, 2018
Applicant:
Hanwha Solutions Corporation, Seoul, KR;
Inventors:
Seung Hoe Do, Daejeon, KR;
Jin Seo Lee, Seongnam-si, KR;
Kyung Ho Kwon, Daegu, KR;
Do Kyoung Kim, Busan, KR;
Hye Yeon Lee, Seoul, KR;
Kyoung Won Yim, Gwangju, KR;
Assignee:
HANWHA SOLUTIONS CORPORATION, Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 69/18 (2006.01); C08K 3/12 (2006.01); C08K 3/20 (2006.01); C08K 5/20 (2006.01); C08K 5/21 (2006.01);
U.S. Cl.
CPC ...
C08G 69/18 (2013.01); C08K 3/12 (2013.01); C08K 3/20 (2013.01); C08K 5/20 (2013.01);
Abstract
Provided is a method for preparing a polyamide by an anionic polymerization reaction, wherein lactam, and based on 100 parts by weight of the entire lactam, 0.01 parts by weight to 20 parts by weight of an alkali metal as an initiator, 0.3 parts by weight to 10 parts by weight of a molecular weight controller, and 0.002 parts by weight to 1.0 part by weight of carbon dioxide as an activator may be included.