JPS57190021A - Preparation of polyimide powder - Google Patents

Preparation of polyimide powder

Info

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
Application number
JP7533281A
Other languages
Japanese (ja)
Other versions
JPS5811455B2 (en
Inventor
Kazumasa Igarashi
Katsuhiko Yamaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP7533281A priority Critical patent/JPS5811455B2/en
Publication of JPS57190021A publication Critical patent/JPS57190021A/en
Publication of JPS5811455B2 publication Critical patent/JPS5811455B2/en
Expired legal-status Critical Current

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
JP7533281A 1981-05-18 1981-05-18 Method for producing polyimide powder Expired JPS5811455B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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