JPS56163123A - Polyamic acid solution composition and its preparation - Google Patents

Polyamic acid solution composition and its preparation

Info

Publication number
JPS56163123A
JPS56163123A JP6715780A JP6715780A JPS56163123A JP S56163123 A JPS56163123 A JP S56163123A JP 6715780 A JP6715780 A JP 6715780A JP 6715780 A JP6715780 A JP 6715780A JP S56163123 A JPS56163123 A JP S56163123A
Authority
JP
Japan
Prior art keywords
polyamic acid
mixed solvent
acid solution
diamine
biphenyltetracarboxylic dianhydride
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
JP6715780A
Other languages
Japanese (ja)
Other versions
JPS6337137B2 (en
Inventor
Ichiro Sasaki
Mikito Kashima
Shuji Yamamoto
Toshihiro Inoue
Tatsuo Tsumiyama
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.)
Ube Corp
Original Assignee
Ube Industries 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 Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP6715780A priority Critical patent/JPS56163123A/en
Publication of JPS56163123A publication Critical patent/JPS56163123A/en
Publication of JPS6337137B2 publication Critical patent/JPS6337137B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain titled stable composition having a low viscosity at normal temperature and being uniformly coated when applied as a coating varnish, by polymerizing biphenyltetracarboxylic dianhydride with an armoatic diamine in a specified mixed solvent.
CONSTITUTION: A mixed solvent is obtained by mixing (A) 100pts.wt. dioxane, with (B) 35W80pts.wt. dimethylformamide or N-methylpyrrolidone and (C) 0W 75pts.wt. lower alcohol, e.g., methyl alcohol. Next, this mixed solvent is mixed with both biphenyltetracarboxylic dianhydride and an aromatic diamine of the formula I or II, wherein R1 and R2 are each a substituent such as H or a lower alkyl, and A is a bivalent group wuch as -O- or -S-. The resulting mixture is polymerized at 100°C or below for 0.5W30hr to obtain a polyamic acid solution containing 5W40pts.wt. polyamic acid containing at least 80% recurring units represented by formula III, wherein R is a bivalent aromatic residue derived by removing the amino groups from the aromatic diamine.
COPYRIGHT: (C)1981,JPO&Japio
JP6715780A 1980-05-22 1980-05-22 Polyamic acid solution composition and its preparation Granted JPS56163123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6715780A JPS56163123A (en) 1980-05-22 1980-05-22 Polyamic acid solution composition and its preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6715780A JPS56163123A (en) 1980-05-22 1980-05-22 Polyamic acid solution composition and its preparation

Publications (2)

Publication Number Publication Date
JPS56163123A true JPS56163123A (en) 1981-12-15
JPS6337137B2 JPS6337137B2 (en) 1988-07-22

Family

ID=13336772

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6715780A Granted JPS56163123A (en) 1980-05-22 1980-05-22 Polyamic acid solution composition and its preparation

Country Status (1)

Country Link
JP (1) JPS56163123A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196320A (en) * 1983-02-25 1984-11-07 ナシヨナル・エアロノ−テイツクス・アンド・スペ−ス・アドミニストレ−シヨン Polyphenylene ether having imido bound group and manufacture
JPS6175602A (en) * 1984-09-21 1986-04-18 Ube Ind Ltd Dielectric resonator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4912357A (en) * 1972-03-20 1974-02-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4912357A (en) * 1972-03-20 1974-02-02

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196320A (en) * 1983-02-25 1984-11-07 ナシヨナル・エアロノ−テイツクス・アンド・スペ−ス・アドミニストレ−シヨン Polyphenylene ether having imido bound group and manufacture
JPS6175602A (en) * 1984-09-21 1986-04-18 Ube Ind Ltd Dielectric resonator

Also Published As

Publication number Publication date
JPS6337137B2 (en) 1988-07-22

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