Invention Grant
- Patent Title: Bismaleimide modified product and method for producing the same
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Application No.: US16011077Application Date: 2018-06-18
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Publication No.: US10759753B2Publication Date: 2020-09-01
- Inventor: Yuki Yamada , Tatsuya Morikita , Takeshi Yoshida , Akira Shigeta , Yoshiaki Echigo
- Applicant: UNITIKA LTD.
- Applicant Address: JP Amagasaki-Shi
- Assignee: UNITIKA LTD.
- Current Assignee: UNITIKA LTD.
- Current Assignee Address: JP Amagasaki-Shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@731fa079
- Main IPC: C07D207/448
- 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.
Public/Granted literature
- US20180362463A1 BISMALEIMIDE MODIFIED PRODUCT AND METHOD FOR PRODUCING THE SAME Public/Granted day:2018-12-20
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