Title:
METHOD FOR PREPARING POLYAMIDE BY ANIONIC RING-OPENING COPOLYMERIZATION AND POLYAMIDE PREPARED THEREBY
Document Type and Number:
WIPO Patent Application WO/2020/116791
Kind Code:
A1
Abstract:
The invention of the present application relates to a method for preparing a polyamide by anionic ring-opening copolymerization in consideration of the reactivity between monomers and an alkali metal-based initiator. The present invention relates to a method for preparing a polyamide by anionic ring-opening polymerization, in which, by adding a metal hydride, which is an alkali metal-based initiator, to a lactam having higher reactivity therewith, the production rate from monomers initiated with anions is increased, thus enabling polymerization with a high conversion rate within a short polymerization reaction time to obtain a polymer having a uniform molecular weight. The present invention relates to a method for preparing a polyamide by anionic ring-opening copolymerization (AROP), the method comprising adding 0.01-20 parts by weight of a metal hydride with respect to 100 parts by weight of a total of at least two lactams, wherein the alkali metal-based initiator is mixed with one of the two lactams having higher reactivity. Therefore, the present invention is to enhance the rate of conversion into random copolymers by adding a metal hydride, which is an alkali metal-based initiator, to monomers having higher reactivity to increase the production rate from monomers initiated with anions.
Inventors:
KIM DO KYOUNG (KR)
LEE JIN SEO (KR)
DO SEUNG HOE (KR)
LEE JIN SEO (KR)
DO SEUNG HOE (KR)
Application Number:
PCT/KR2019/014577
Publication Date:
June 11, 2020
Filing Date:
October 31, 2019
Export Citation:
Assignee:
HANWHA SOLUTIONS CORP (KR)
International Classes:
C08G69/18; C08G69/20
Foreign References:
| US4101531A | 1978-07-18 | |||
| KR20150044786A | 2015-04-27 | |||
| KR20130015154A | 2013-02-13 | |||
| KR20140115171A | 2014-09-30 | |||
| US4754000A | 1988-06-28 | |||
| KR20170073536A | 2017-06-28 | |||
| US6713596B1 | 2004-03-30 |
Other References:
BAR-ZAKAY, S. ET AL.: "Studies on Anionic Polymerization of Lactams. Part III. Copolymerization of Pyrrolidone and Caprolactam", JOURNAL OF POLYMER SCIENCE : PART A- 1, vol. 5, no. 5, May 1967 (1967-05-01), pages 965 - 974, XP055716835
HOWEVER, POLYMER, vol. 38, no. 4, 1997, pages 937 - 938
POLYMER, vol. 47, 2006, pages 140 - 147
See also references of EP 3892667A4
HOWEVER, POLYMER, vol. 38, no. 4, 1997, pages 937 - 938
POLYMER, vol. 47, 2006, pages 140 - 147
See also references of EP 3892667A4
Attorney, Agent or Firm:
KIM, Chang Deok (KR)
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