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公开(公告)号：US20180086704A1
公开(公告)日：2018-03-29
申请号：US15564667
申请日：2016-04-06
Applicant: UNITIKA LTD.
Inventor： Yumeto FUKUBAYASHI , Makoto NAKAI , Akira SHIGETA , Munenori YAMADA
IPC: C07D209/48 , C07D403/10 , C07B43/06 , B01J19/00
CPC classification number: C07D209/48 , B01J19/0013 , C07B43/06 , C07D403/10
Abstract: An object of the present invention is to provide an industrially advantageous method for producing a bisimide dicarboxylic acid, which uses substantially no solvent and requires no granulation after completion of the reaction.The above object can be achieved by a method for producing a bisimide dicarboxylic acid with a tricarboxylic acid anhydride and a diamine, including the following processes (i) and (ii): a process (i) in which, provided that a compound having a higher melting point is a high melting compound and a compound having a lower melting point is a low melting compound, when a melting point is compared between the tricarboxylic acid anhydride and the diamine, the high melting compound is heated at a temperature between less than the melting point of the high melting compound and not lower than the melting point of the low melting compound, and the low melting compound is added to the high melting compound while the high melting compound maintains its solid states, to give a mixture; and a process (ii) in which the resultant mixture in the process (i) is heated while its solid states are kept, to give bisimide dicarboxylic acid.
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公开(公告)号：US20210139390A1
公开(公告)日：2021-05-13
申请号：US17257199
申请日：2019-06-28
Applicant: UNITIKA LTD.
Inventor： Yumeto FUKUBAYASHI , Makoto NAKAI , Ayumi YANAKA
IPC: C07B61/00 , C07C233/77 , C07C233/81 , C08G63/78
Abstract: The present invention provides a production method of an organic compound, in which a reaction is performed between functional groups without using any solvents. The present invention relates to a production method of an organic compound, in which a reaction is performed between functional groups by using a mechanochemical effect.
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公开(公告)号：US20220106435A1
公开(公告)日：2022-04-07
申请号：US17426228
申请日：2020-01-21
Applicant: UNITIKA LTD.
Inventor： Ayumi YANAKA , Yumeto FUKUBAYASHI , Takatoshi MURAKAMI
Abstract: The present invention provides an epoxy resin solution, from which an epoxy resin-cured product adequately excellent in heat-resisting properties and dielectric properties can be obtained with adequately good working properties ensured. The present invention relates to an epoxy resin solution containing at least a curing agent and an epoxy resin mixed in an organic solvent, wherein the curing agent comprises an imide group-containing curing agent having 1-4 imide groups and 2-4 glycidyl group-reactive functional groups in a molecule.
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公开(公告)号：US20180072848A1
公开(公告)日：2018-03-15
申请号：US15564678
申请日：2016-04-06
Applicant: UNITIKA LTD.
Inventor： Yumeto FUKUBAYASHI , Makoto NAKAI , Akira SHIGETA , Munenori YAMADA
IPC: C08G73/14
Abstract: The present invention is to provide a polyamide-imide which has a high regularity of molecular structure and few branched structures, does not contain hydrogen halide, is not required to be separated and purified in post processes, and can be suitably used as a film, a varnish, or a molding material; raw material salt of polyamide-imide and production method thereof.The polyamide-imide has a repeating unit represented by the general formula (1): in which R1, R2 represent independently a divalent residue having an aromatic ring, an aliphatic ring or an aliphatic hydrocarbon; R3, R4 represent independently a trivalent residue having an aromatic ring or an aliphatic ring; and an hydrogen atom bonding to the respective rings may be replaced by another atom or an atomic group.
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