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Flexible aromatic diamine monomer containing aromatic ring side group and preparation method thereof

A technology of aromatic diamines and side groups, which is applied in the field of flexible aromatic diamine monomers and its preparation, can solve the problems of main chain flexibility and aromatic ring side groups, and achieve the effect of improved processability and broad application prospects

Inactive Publication Date: 2018-10-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the main chain flexibility and aromatic ring side groups do not have both in the diamine monomers required for the synthesis of common polyimides, and provide a kind of flexible group in the main chain and side groups. Novel diamine monomer with aromatic ring in base and preparation method thereof

Method used

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  • Flexible aromatic diamine monomer containing aromatic ring side group and preparation method thereof
  • Flexible aromatic diamine monomer containing aromatic ring side group and preparation method thereof
  • Flexible aromatic diamine monomer containing aromatic ring side group and preparation method thereof

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specific Embodiment approach 1

[0027] Specific implementation mode 1: A flexible aromatic diamine monomer containing aromatic ring side groups according to this implementation mode, its chemical formula is C 31 h 24 N 2 o 4 , the structural formula is:

[0028]

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the initial raw materials for preparing flexible aromatic diamine monomers containing aromatic ring side groups are phloroglucinol and p-fluoronitrobenzene; The monomer obtained by reaction in N-dimethylformamide. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the reaction product of the first step in the reaction is 3,5-bis(4-nitrophenoxy)phenol, chemical formula: C1 8 h 12 N 2 o 7 ;Structural formula:

[0031]

[0032] Others are the same as in the first embodiment.

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Abstract

The invention provides a flexible aromatic diamine monomer containing an aromatic ring side group and a preparation method thereof, and aims at solving the problem that the main chain in a diamine monomer essential to conventional polyimide synthesis does not have both flexible group and aromatic ring side group. The method mainly comprises the following steps: 1, preparing 3,5-di(4-nitrophenoxy)phenol by using phloroglucinol and 4-fluoronitrobenzene as raw materials; 2, preparing 3,5-di(4-aminophenoxy)phenol from the 3,5-di(4-nitrophenoxy)phenol; and 3, preparing novel diamine monomer 4-(3,5-di(4-3,5-di(4-nitrophenoxy))phenylbenzophenone from the 3,5-di(4-aminophenoxy)phenol. The novel diamine monomer has relatively large aromatic ring side group and flexible group, can be used for improving the transparency, processing performance and the like of polyimide, and has a broad application prospect in the future.

Description

technical field [0001] The invention relates to a flexible aromatic diamine monomer containing aromatic ring side groups and a preparation method thereof. Background technique [0002] Polyimide (PI) is an aromatic heterocyclic polymer containing imide characteristic groups in the main chain structural unit. It has the advantages of high temperature resistance, radiation resistance, excellent mechanical properties, and diverse processing routes. It has been widely used in Automotive, microelectronics, aerospace and other fields. One of the most common synthetic methods of polyimide is polycondensation of dianhydride and diamine monomers, so new monomers are the basis for preparing new polyimides. [0003] Dianhydride and diamine monomers that introduce flexible groups or larger side groups into their structures have become research hotspots in recent years, because this type of monomer has beneficial effects on the transparency and processability of polyimide. Contents of...

Claims

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Application Information

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IPC IPC(8): C07C217/90C07C213/08
CPCC07C217/90
Inventor 肖鑫礼孔德艳
Owner HARBIN INST OF TECH
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