JPS64122A - Production of polyimide powder - Google Patents
Production of polyimide powderInfo
- Publication number
- JPS64122A JPS64122A JP7041588A JP7041588A JPS64122A JP S64122 A JPS64122 A JP S64122A JP 7041588 A JP7041588 A JP 7041588A JP 7041588 A JP7041588 A JP 7041588A JP S64122 A JPS64122 A JP S64122A
- Authority
- JP
- Japan
- Prior art keywords
- polyamic acid
- aliphatic
- solution
- vol
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
PURPOSE: To produce a fine polyimide powder of excellent moldability, by adding a specified poor solvent for a polyamic acid and an aliphatic acid anhydride to a polyamic acid solution and dehydrating the polyamic acid to cause ring closure.
CONSTITUTION: A polyamic acid solution is obtained by dissolving a polyamic acid (a) mainly consisting of repeating units of the formula (wherein Ar is a tetravalent aromatic residue containing at least one six-membered carbocyclic ring, and Ar' is a bivalent aromatic or aliphatic residue) in an amide solvent (b) (e.g., N,N-dimethylacetamide). To this solution are added 1.0W5.0pts. vol., per, pt. vol. component (b), poor solvent (c) for component (a) of a solubility parameter of 9.0W10.0 (Cal/cm3) 1/2 (e.g., acetone) and at least 0.3 equivalent, per equivalent of the amic acid units, of aliphatic acid anhydride (d) (e.g., acetic anhydride). The obtained mixture is dehydrated to cause ring closure at 150°C or below in the presence of a tert. amine catalyst (e.g., pyridine).
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63070415A JP2860987B2 (en) | 1987-03-23 | 1988-03-23 | Method for producing polyimide powder |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-65762 | 1987-03-23 | ||
JP6576287 | 1987-03-23 | ||
JP63070415A JP2860987B2 (en) | 1987-03-23 | 1988-03-23 | Method for producing polyimide powder |
Publications (3)
Publication Number | Publication Date |
---|---|
JPH01122A JPH01122A (en) | 1989-01-05 |
JPS64122A true JPS64122A (en) | 1989-01-05 |
JP2860987B2 JP2860987B2 (en) | 1999-02-24 |
Family
ID=26406909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63070415A Expired - Fee Related JP2860987B2 (en) | 1987-03-23 | 1988-03-23 | Method for producing polyimide powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2860987B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002128892A (en) * | 2000-10-31 | 2002-05-09 | Ube Ind Ltd | Preparing method of polyimide powder, polyimide powder, polyimide-powder molded article and its manufacturing method |
JP2006182844A (en) * | 2004-12-27 | 2006-07-13 | Osaka Prefecture | Polyimide wet gel and method for producing the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6195029A (en) * | 1984-10-15 | 1986-05-13 | Mitsui Toatsu Chem Inc | Production of polyimide resin powder, bonding method and film-forming method using polyimide resin powder |
JPS61250030A (en) * | 1985-04-26 | 1986-11-07 | イー・アイ・デュポン・ドゥ・ヌムール・アンド・カンパニー | Polyimide molding resin and molded product |
-
1988
- 1988-03-23 JP JP63070415A patent/JP2860987B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6195029A (en) * | 1984-10-15 | 1986-05-13 | Mitsui Toatsu Chem Inc | Production of polyimide resin powder, bonding method and film-forming method using polyimide resin powder |
JPS61250030A (en) * | 1985-04-26 | 1986-11-07 | イー・アイ・デュポン・ドゥ・ヌムール・アンド・カンパニー | Polyimide molding resin and molded product |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002128892A (en) * | 2000-10-31 | 2002-05-09 | Ube Ind Ltd | Preparing method of polyimide powder, polyimide powder, polyimide-powder molded article and its manufacturing method |
JP2006182844A (en) * | 2004-12-27 | 2006-07-13 | Osaka Prefecture | Polyimide wet gel and method for producing the same |
JP4686742B2 (en) * | 2004-12-27 | 2011-05-25 | 大阪府 | Polyimide wet gel and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JP2860987B2 (en) | 1999-02-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |