Bismaleimide modified product and method for producing the same
US-10759753-B2 · Sep 1, 2020 · US
Bismaleimide modified product and method for producing the same
US11104643B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11104643-B2 |
| Application number | US-202016930397-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 16, 2020 |
| Priority date | Jun 19, 2017 |
| Publication date | Aug 31, 2021 |
| Grant date | Aug 31, 2021 |
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- Title
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Abstract
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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: <1> 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 1 H-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. <2> 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.
First claim
Opening claim text (preview).
The invention claimed is: 1. 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) In 1 H-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; and 2) A weight average molecular weight of the D-BMI modified product is in a range of 1,200 to 20,000.
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Classifications
- C07D207/448Primary
with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms, e.g. maleimide · CPC title
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- What does patent US11104643B2 cover?
- 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: <1> A bismaleimide (D-BMI) modified product in which an amino group of dimer diamine is maleimid…
- Who is the assignee on this patent?
- Unitika Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07D207/448. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 31 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).