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Tetracarboxylic dianhydride, carbonyl compound, polyimide precursor resin, and polyimide
US11667754B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11667754-B2 |
| Application number | US-201816484886-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 8, 2018 |
| Priority date | Feb 13, 2017 |
| Publication date | Jun 6, 2023 |
| Grant date | Jun 6, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A tetracarboxylic dianhydride includes: at least one acid dianhydride (A) selected from the group consisting of compounds each having an endo/exo type three-dimensional structure represented by a particular general formula and their enantiomeric compounds each having an exo/endo type three-dimensional structure; and/or an acid dianhydride (B) having an endo/endo type three-dimensional structure represented by a particular general formula, wherein a content of the acid dianhydride (B) in a total amount of the acid dianhydrides (A) and (B) is 30 to 100% by mole in a mole ratio.
First claim
Opening claim text (preview).
The invention claimed is: 1. A tetracarboxylic dianhydride comprising at least one acid dianhydride (A) selected from the group consisting of compounds each having an endo/exo type three-dimensional structure represented by the following general formula (1): [in the formula (1), R 1 s each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, a hydroxy group, and a nitro group, or two R 1 s connected to a common carbon atom may together form a methylidene group, and R 2 and R 3 each independently represent one selected from the group consisting of a hydrogen atom and alkyl groups having 1 to 10 carbon atoms] and their enantiomeric compounds each having an exo/endo type three-dimensional structure, and/or an acid dianhydride (B) having an endo/endo type three-dimensional structure represented by the following general formula (2): [in the formula (2), R 1 s, R 2 , and R 3 have the same meanings as those of R 1 s, R 2 , and R 3 in the above formula (1), respectively], wherein a content of the acid dianhydride (B) in a total amount of the acid dianhydrides (A) and (B) is 30 to 100% by mole in a mole ratio.
Assignees
Inventors
Classifications
- C07C69/753Primary
of polycyclic acids · CPC title
with oxygen only in the diamino moiety · CPC title
- C08G73/10Primary
Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title
wholly aromatic in the diamino moiety · CPC title
- C07D307/93Primary
condensed with a ring other than six-membered · CPC title
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- What does patent US11667754B2 cover?
- A tetracarboxylic dianhydride includes: at least one acid dianhydride (A) selected from the group consisting of compounds each having an endo/exo type three-dimensional structure represented by a particular general formula and their enantiomeric compounds each having an exo/endo type three-dimensional structure; and/or an acid dianhydride (B) having an endo/endo type three-dimensional structure…
- Who is the assignee on this patent?
- Jxtg Nippon Oil & Energy Corp, Eneos Corp
- What technology area does this patent fall under?
- Primary CPC classification C07C69/753. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 06 2023 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).