Title:
METHOD FOR PRODUCING BLOCKED ISOCYANATE COMPOUND AND METHOD FOR PRODUCING ISOCYANATE COMPOUND
Document Type and Number:
WIPO Patent Application WO/2023/106377
Kind Code:
A1
Abstract:
Provided is a method for producing a blocked isocyanate compound, the method comprising a reaction step of reacting a primary amine compound, a carbonic acid derivative, and a blocking agent by means of heat treatment in the presence of at least one compound selected from the group consisting of a secondary amine compound represented by general formula (I) and a tertiary amine compound represented by general formula (II) to obtain a blocked isocyanate compound. Also provided is a method for producing an isocyanate compound, the method comprising a reaction step of decomposing a blocked isocyanate compound into a blocking agent and an isocyanate compound by means of heat treatment in the presence of at least one compound selected from the group consisting of a secondary amine compound represented by general formula (I) and a tertiary amine compound represented by general formula (II) to obtain the isocyanate compound. [Chemical formula 1]
Inventors:
INADA HIROSHI (JP)
NAKAOKA KOICHI (JP)
ONISHI KAZUHIRO (JP)
NAKAOKA KOICHI (JP)
ONISHI KAZUHIRO (JP)
Application Number:
PCT/JP2022/045329
Publication Date:
June 15, 2023
Filing Date:
December 08, 2022
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
C07C263/04; C07C239/08; C07C265/14; C07C269/04; C07C269/08; C07C271/12; C07C271/24; C07C271/28; C07C271/44; C07C271/56; C07C271/58; C07C273/14; C07C275/06; C07C275/14; C07C275/18; C07C275/24; C07C275/26; C07C275/28
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Other References:
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HUTCHBY M ET AL.: "Hindered Ureas as Masked Isocyanates: Facile Carbamoylation of Nucleophiles under Neutral Conditions", ANGEW. CHEM. INT. ED., vol. 48, 2009, pages 8721 - 8724, XP072076223, DOI: 10.1002/anie.200904435
HUTCHBY M ET AL.: "Hindered Ureas as Masked Isocyanates: Facile Carbamoylation of Nucleophiles under Neutral Conditions", ANGEW. CHEM. INT. ED., vol. 48, 2009, pages 8721 - 8724, XP072076223, DOI: 10.1002/anie.200904435
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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