US 11,718,713 B2
Method for producing polyamide by coordinated anionic ring-opening polymerization, and polyamide produced thereby
Hye Yeon Lee, Seoul (KR); Dae Hak Kim, Seongnam-si (KR); Seung Hoe Do, Daejeon (KR); Jin Seo Lee, Seongnam-si (KR); Kyung Ho Kwon, Daegu (KR); Kyoung Won Yim, Gwangju (KR); and Do Kyoung Kim, Busan (KR)
Assigned to HANWHA CHEMICAL CORPORATION, Seoul (KR)
Appl. No. 16/764,099
Filed by HANWHA CHEMICAL CORPORATION, Seoul (KR)
PCT Filed Oct. 29, 2018, PCT No. PCT/KR2018/012939
§ 371(c)(1), (2) Date May 14, 2020,
PCT Pub. No. WO2019/098570, PCT Pub. Date May 23, 2019.
Claims priority of application No. 10-2017-0153095 (KR), filed on Nov. 16, 2017.
Prior Publication US 2020/0277439 A1, Sep. 3, 2020
Int. Cl. C08G 69/20 (2006.01); B01J 31/12 (2006.01); C08K 5/56 (2006.01)
CPC C08G 69/20 (2013.01) [B01J 31/121 (2013.01); C08K 5/56 (2013.01)] 12 Claims
 
1. A method for producing a polyamide from a lactam by a coordinated anionic ring-opening polymerization reaction, comprising subjecting a reaction mixture comprising
the lactam, and
based on arts by weight of the lactam in its entirety, 0.01 parts by weight to 20 parts by weight of a metal alkoxide as an initiator, 0.01 parts by weight to 20 parts by weight of a metal hydride as a catalyst, and 0.002 parts by weight to 20 parts weight of carbon dioxide (CO2) as an activator,
to a coordinated anionic ring-opening polymerization reaction.