公开(公告)号：US11104643B2

公开(公告)日：2021-08-31

申请号：US16930397

申请日：2020-07-16

Applicant: UNITIKA LTD.

Inventor： Yuki Yamada ,  Tatsuya Morikita ,  Takeshi Yoshida ,  Akira Shigeta ,  Yoshiaki Echigo

IPC: 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：US10759753B2

公开(公告)日：2020-09-01

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

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：US20160214169A1

公开(公告)日：2016-07-28

申请号：US14649393

申请日：2013-12-13

Applicant: UNITIKA LTD.

Inventor： Munenori Yamada ,  Kou Takeuchi ,  Mutsumi Matsushita ,  Airi Horikoshi ,  Akira Shigeta ,  Masahiro Hosoda ,  Yoshiaki Echigo ,  Kenta Shibata

IPC: B22F1/00 ,  B22F9/24

CPC classification number: B22F1/004 ,  B22F9/24 ,  B22F2009/245 ,  B22F2301/10 ,  B22F2304/10 ,  B22F2998/10 ,  C30B7/00 ,  C30B7/14 ,  C30B29/02 ,  C30B29/62

Abstract: The present invention provides fibrous copper microparticles suppressed in the occurrence of irregularities on the surface thereof and the aggregates of the fibrous copper microparticles having an average crystallite diameter controlled so as to fall within a specific range. In the fibrous copper microparticles of the present invention, the number of fibrous copper microparticles each including one or more irregularities each having a dimensional difference of 0.02 μm or more, in a range of 1 μm in the lengthwise direction of a fibrous body, between the maximum diameter portion of the fibrous body and the minimum diameter portion of the fibrous body falling in a diameter dimension range of 0.01 to 0.5 μm, and each having a length of 1 μm or more is 10 or less per 100 of the fibrous copper microparticles.

Abstract translation: 本发明提供了抑制其表面发生不规则性的纤维状铜微粒和将平均微细直径控制在特定范围内的纤维状铜微粒的聚集体。 在本发明的纤维状铜微粒中，纤维状铜微粒的数量在纤维体的长度方向上为1μm以上的尺寸差为0.02μm以上的不规则性， 纤维体的最大直径部分和纤维体的最小直径部分，其直径尺寸范围为0.01〜0.5μm，长度为1μm以上，每100个纤维状铜微粒为10个以下。

公开(公告)号：US11958806B2

公开(公告)日：2024-04-16

申请号：US17037164

申请日：2020-09-29

Applicant: UNITIKA LTD.

Inventor： Yuki Yamada ,  Tatsuya Morikita ,  Yosuke Sugimoto ,  Takeshi Yoshida ,  Akira Shigeta ,  Yoshiaki Echigo

IPC: C07D207/448 ,  B01D9/00 ,  B01D11/04 ,  C07C267/00

CPC classification number: C07D207/448 ,  B01D9/005 ,  B01D11/0492 ,  C07C267/00

Abstract: An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced.



A method for producing purified MI, comprising reducing an acid value of crude MI by 50% or more, by adding carbodiimide (CDI) to a solution comprising the crude MI to react an acid component in the crude MI with the CDI.
The method for producing purified MI, comprising adding 0.5% by mass or more and 8% by mass or less of the CDI with respect to a mass of the crude MI for reaction.
The method for producing purified MI, wherein the CDI is N,N′-diisopropyl carbodiimide (DIC).
The method for producing purified MI, comprising removing a urea derivative of the CDI (CDI-U) by-produced when reacting the acid component in the crude MI with the CDI.

公开(公告)号：US20210009516A1

公开(公告)日：2021-01-14

申请号：US17037164

申请日：2020-09-29

Applicant: UNITIKA LTD.

Inventor： Yuki Yamada ,  Tatsuya Morikita ,  Yosuke Sugimoto ,  Takeshi Yoshida ,  Akira Shigeta ,  Yoshiaki Echigo

IPC: C07D207/448 ,  B01D11/04 ,  B01D9/00

Abstract: An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced. A method for producing purified MI, comprising reducing an acid value of crude MI by 50% or more, by adding carbodiimide (CDI) to a solution comprising the crude MI to react an acid component in the crude MI with the CDI. The method for producing purified MI, comprising adding 0.5% by mass or more and 8% by mass or less of the CDI with respect to a mass of the crude MI for reaction. The method for producing purified MI, wherein the CDI is N,N′-diisopropyl carbodiimide (DIC). The method for producing purified MI, comprising removing a urea derivative of the CDI (CDI-U) by-produced when reacting the acid component in the crude MI with the CDI.