JPS57190021A - Preparation of polyimide powder - Google Patents
Preparation of polyimide powderInfo
- Publication number
- JPS57190021A JPS57190021A JP7533281A JP7533281A JPS57190021A JP S57190021 A JPS57190021 A JP S57190021A JP 7533281 A JP7533281 A JP 7533281A JP 7533281 A JP7533281 A JP 7533281A JP S57190021 A JPS57190021 A JP S57190021A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- film
- imidated
- shielded
- polyamic acid
- 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
Abstract
PURPOSE: To prepare the titled powder with simple preparation process, by forming an imidated film on the surface of a solution of a polyimide precursor to seal the solution, heating the solution to effect the imidation reaction, and precipitating the product in powdery form by the action of the by-producted low- molecular compound.
CONSTITUTION: An imidated film (preferably 20W50μ in thickness) is formed on the liquid surface of a solution of a polyimide precursor (a polyamic acid solution) by blasting hot air of usually 150W200°C for about 1W3hr. The polyamide precursor solution shielded with the film is heat-treated usually at 200W300°C for 12W24hr to effect the imidation reaction and at the same time to make the produced imidated compound hardly soluble by keeping the by-produced low-molecular compound in the solution shielded with the film. The objective polyimide powder can be obtained as precipitate. The polyamic acid solution is preferably the one obtained by condensing a tetracarboxylic acid dianhydride of formulaI (e.g. pyromellitic dianhydride) and a diamine of formula II (e.g. p-phenylenediamine) in an organic solvent.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7533281A JPS5811455B2 (en) | 1981-05-18 | 1981-05-18 | Method for producing polyimide powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7533281A JPS5811455B2 (en) | 1981-05-18 | 1981-05-18 | Method for producing polyimide powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57190021A true JPS57190021A (en) | 1982-11-22 |
JPS5811455B2 JPS5811455B2 (en) | 1983-03-03 |
Family
ID=13573188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7533281A Expired JPS5811455B2 (en) | 1981-05-18 | 1981-05-18 | Method for producing polyimide powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5811455B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62185748A (en) * | 1986-02-12 | 1987-08-14 | Ube Ind Ltd | Wear-resistant molding for use as sliding material |
JPH01266134A (en) * | 1988-04-19 | 1989-10-24 | Ube Ind Ltd | Polyimide powder molding and its production |
JPH02128665A (en) * | 1988-11-07 | 1990-05-17 | Gentaro Inoue | Formation of crane-flying flat form with vegetable as raw material |
JPH09169905A (en) * | 1985-04-26 | 1997-06-30 | E I Du Pont De Nemours & Co | Solid particulate polyimide and its production |
US5898048A (en) * | 1996-04-05 | 1999-04-27 | Ube Industries, Ltd. | Polyimide powder and process for producing powder molded body |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6250636U (en) * | 1985-09-19 | 1987-03-28 | ||
JPS62250921A (en) * | 1986-04-25 | 1987-10-31 | Matsushita Electric Ind Co Ltd | Bathtub water purification device |
-
1981
- 1981-05-18 JP JP7533281A patent/JPS5811455B2/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09169905A (en) * | 1985-04-26 | 1997-06-30 | E I Du Pont De Nemours & Co | Solid particulate polyimide and its production |
JPS62185748A (en) * | 1986-02-12 | 1987-08-14 | Ube Ind Ltd | Wear-resistant molding for use as sliding material |
JPH01266134A (en) * | 1988-04-19 | 1989-10-24 | Ube Ind Ltd | Polyimide powder molding and its production |
JPH02128665A (en) * | 1988-11-07 | 1990-05-17 | Gentaro Inoue | Formation of crane-flying flat form with vegetable as raw material |
JPH046334B2 (en) * | 1988-11-07 | 1992-02-05 | Gentaro Inoe | |
US5898048A (en) * | 1996-04-05 | 1999-04-27 | Ube Industries, Ltd. | Polyimide powder and process for producing powder molded body |
Also Published As
Publication number | Publication date |
---|---|
JPS5811455B2 (en) | 1983-03-03 |
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