公开(公告)号：US20180362463A1

公开(公告)日：2018-12-20

申请号：US16011077

申请日：2018-06-18

申请人： UNITIKA LTD.

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

IPC分类号： C07D207/448

CPC分类号： C07D207/448

摘要： 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：US20190382341A1

公开(公告)日：2019-12-19

申请号：US16555675

申请日：2019-08-29

申请人： UNITIKA LTD.

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

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

摘要： 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

申请人： UNITIKA LTD.

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

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

CPC分类号： C07D207/452 ,  B01D11/0492 ,  C07C267/00

摘要： 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.