Method for producing polyimide precursor and method for producing polyimide

Patent metadata

Field	Value
Publication number	US-9688815-B2
Application number	US-201414892643-A
Country	US
Kind code	B2
Filing date	May 19, 2014
Priority date	May 27, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A method for producing a polyimide precursor, including: reacting tetracarboxylic dianhydride represented by the following General Formula (1) with a diamine compound represented by the following General Formula (2) in a compressive fluid to thereby produce a polyimide precursor represented by the following Formula (3):

where, X in the General Formulae (1) and (3) denotes a tetravalent aromatic group or a tetravalent alicyclic group, Y in the General Formulae (2) and (3) denotes a divalent organic group, and n denotes the number of repetitions.

First claim

The invention claimed is:

1. A method for producing a polyimide precursor, comprising:
reacting tetracarboxylic dianhydride represented by the following General Formula (1) with a diamine compound represented by the following General Formula (2) in a compressive fluid to thereby produce a polyimide precursor represented by the following General Formula (3):

wherein, X in the General Formulae (1) and (3) denotes a tetravalent aromatic group or a tetravalent alicyclic group, Y in the General Formulae (2) and (3) denotes a divalent organic group, and n denotes the number of repetitions, and
the compressive fluid contains an active hydrogen-free tertiary amine, and
the active hydrogen-free tertiary amine is at least one selected from the group consisting of tri-ethylamine, tripropylamine, tributylamine, N-methimorpholine, 1,4-diazabicyclo[2,2,2] octane and diazabicycloundecene; and
discharging the polyimide precursor, represented by the General Formula (3), from an injection nozzle together with the compressive fluid at normal pressure to thereby produce polyimide precursor particles.

2. The method for producing a polyimide precursor according to claim 1 , wherein the polyimide precursor represented by the following General Formula (3) contains a fluorine atom, a siloxane group, or both thereof.

3. The method for producing a polyimide precursor according to claim 1 , wherein the compressive fluid is supercritical carbon dioxide.

4. A method for applying a polyimide precursor, comprising:
discharging the polyimide precursor from an injection nozzle together with a compressive fluid at normal pressure to thereby produce polyimide precursor particles; and
applying the polyimide precursor particles produced in the compressive fluid onto an object together with the compressive fluid,
wherein the compressive fluid contains an active hydrogen-free tertiary amine, and
the active hydrogen-free tertiary amine is at least one selected from the group consisting of tri-ethylamine, tripropylamine, tributylamine, N-methimorpholine, 1,4-diazabicyclo[2,2,2] octane and diazabicycloundecene.

Assignees

• Nozaki Chiyoshi
• Ricoh Co Ltd

Inventors

• Nozaki Chiyoshi

Classifications

• C08G73/1028 Primary

  characterised by the process itself, e.g. steps, continuous · CPC title

• C08G73/10

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C08G73/1021

  characterised by the catalyst used · CPC title

• C08G73/105

  with oxygen only in the diamino moiety · CPC title

• Y10T428/31721

  Of polyimide · CPC title