公开(公告)号：US20180362463A1

公开(公告)日：2018-12-20

申请号：US16011077

申请日：2018-06-18

Applicant: UNITIKA LTD.

Inventor： Yuki YAMADA ,  Tatsuya MORIKITA ,  Takeshi YOSHIDA ,  Akira SHIGETA ,  Yoshiaki ECHIGO

IPC: C07D207/448

CPC classification number: C07D207/448

Abstract: An object of the present invention is to provide a bismaleimide (D-BMI) modified product in which an amino group of dimer diamine (DDA) is maleimidized, which has the good heat resistance, and has the sufficiently enhanced processability, and a method for producing the same. There are provided: A bismaleimide (D-BMI) modified product in which an amino group of dimer diamine is maleimidized, the bismaleimide modified product having the following characteristics: 1) An acid value of the D-BMI modified product is 2 mg-KOH/g or less. 2) In 1H-NMR, when quantitative comparison is performed using an integrated value (A) of a peak corresponding to a proton of a methylene group directly bound to a nitrogen atom of a maleimide group and an integrated value (B) of a peak corresponding to a vinyl proton of a maleimide group, A/B is 1.25 or more and 2.00 or less. A method for producing D-BMI, the method including the following steps: 1) A step of preparing a crude D-BMI solution having an acid value of more than 2 mg-KOH/g. 2) A step of lowering an acid value of D-BMI to 2 mg-KOH/g or less by reacting an acid component in the solution with a carbodiimide compound. 3) A step of reacting the solution without a catalyst at 110 to 200° C. in a solvent.

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.

公开(公告)号：US20190382341A1

公开(公告)日：2019-12-19

申请号：US16555675

申请日：2019-08-29

Applicant: UNITIKA LTD.

Inventor： Yuki YAMADA ,  Tatsuya MORIKITA ,  Takeshi YOSHIDA ,  Akira SHIGETA ,  Yoshiaki ECHIGO

IPC: C07D207/452 ,  B01D11/04 ,  C07C267/00

Abstract: An object of the present invention is to provide a bismaleimide using an aliphatic diamine, in which acid components remaining as an impurity at a very small amount in the bismaleimide have been effectively removed, that is, a bismaleimide using an aliphatic diamine, an acid value of which has sufficiently been reduced, and a method for producing it. There are provided a bismaleimide using an aliphatic diamine as a diamine component, characterized in that an acid value thereof is 2 mg-KOH/g or less, and a method for producing the bismaleimide, comprising adding carbodiimide to a solution comprising a crude bismaleimide having an acid value of more than 2 mg-KOH/g, and reacting acid components in the crude bismaleimide with carbodiimide.

公开(公告)号：US20180201579A1

公开(公告)日：2018-07-19

申请号：US15872463

申请日：2018-01-16

Applicant: UNITIKA LTD.

Inventor： Yuki YAMADA ,  Tatsuya MORIKITA ,  Takeshi YOSHIDA ,  Akira SHIGETA ,  Yoshiaki ECHIGO

IPC: C07D207/452 ,  C07C267/00 ,  B01D11/04

CPC classification number: C07D207/452 ,  B01D11/0492 ,  C07C267/00

Abstract: An object of the present invention is to provide a bismaleimide using an aliphatic diamine, in which acid components remaining as an impurity at a very small amount in the bismaleimide have been effectively removed, that is, a bismaleimide using an aliphatic diamine, an acid value of which has sufficiently been reduced, and a method for producing it. There are provided a bismaleimide using an aliphatic diamine as a diamine component, characterized in that an acid value thereof is 2 mg-KOH/g or less, and a method for producing the bismaleimide, comprising adding carbodiimide to a solution comprising a crude bismaleimide having an acid value of more than 2 mg-KOH/g, and reacting acid components in the crude bismaleimide with carbodiimide.

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.