JPS54144359A - Isomerization of methyl-delta4-tetrahydrophthalic acid anhydride - Google Patents

Isomerization of methyl-delta4-tetrahydrophthalic acid anhydride

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Publication number
JPS54144359A
JPS54144359A JP5267078A JP5267078A JPS54144359A JP S54144359 A JPS54144359 A JP S54144359A JP 5267078 A JP5267078 A JP 5267078A JP 5267078 A JP5267078 A JP 5267078A JP S54144359 A JPS54144359 A JP S54144359A
Authority
JP
Japan
Prior art keywords
thpa
methyl
quaternary ammonium
acid anhydride
mixture
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
JP5267078A
Other languages
Japanese (ja)
Other versions
JPS5834476B2 (en
Inventor
Mototoshi Yamato
Yoshio Natsuume
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.)
Zeon Corp
Original Assignee
Nippon Zeon 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 Nippon Zeon Co Ltd filed Critical Nippon Zeon Co Ltd
Priority to JP5267078A priority Critical patent/JPS5834476B2/en
Priority to US06/034,502 priority patent/US4226779A/en
Publication of JPS54144359A publication Critical patent/JPS54144359A/en
Publication of JPS5834476B2 publication Critical patent/JPS5834476B2/en
Expired legal-status Critical Current

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Abstract

PURPOSE: To obtain a liquid isomer mixture useful as a component of epoxy resin hardeners or unsaturated polyester resins, by heat-treating methyl-Δ-tetrahydro- phthalic acid anhydride in the presence of a quaternary ammonium compound.
CONSTITUTION: Methyl-Δ4-tetrahydrophthalic ackd anhydride (Me-Δ4-THPA) is heat-treated in the presence of a quaternary ammonium compound at 60W300°C to give an isomer mixture. 3-Me-Δ4-THPA (I), 4-Me-Δ4THPA (II), or their mixture may be used as the Me-Δ4-THPA. To obtain a product which is a liquid at 20°C, a mixture of 100W20 wt. % of I and 0W80 wt.% of II may be preferably used. A quaternary ammonium salt, e.g. tetramethylammonium chloride, may be used as the quaternary ammonium compound.
EFFECT: The product having improved color can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP5267078A 1978-05-04 1978-05-04 Method for isomerizing methyl↓-delta↓-4↓-tetrahydrophthalic anhydride Expired JPS5834476B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5267078A JPS5834476B2 (en) 1978-05-04 1978-05-04 Method for isomerizing methyl↓-delta↓-4↓-tetrahydrophthalic anhydride
US06/034,502 US4226779A (en) 1978-05-04 1979-04-30 Process for isomerizing methyl-delta-4-tetrahydrophthalic anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5267078A JPS5834476B2 (en) 1978-05-04 1978-05-04 Method for isomerizing methyl↓-delta↓-4↓-tetrahydrophthalic anhydride

Publications (2)

Publication Number Publication Date
JPS54144359A true JPS54144359A (en) 1979-11-10
JPS5834476B2 JPS5834476B2 (en) 1983-07-27

Family

ID=12921297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5267078A Expired JPS5834476B2 (en) 1978-05-04 1978-05-04 Method for isomerizing methyl↓-delta↓-4↓-tetrahydrophthalic anhydride

Country Status (1)

Country Link
JP (1) JPS5834476B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS601989A (en) * 1983-06-17 1985-01-08 Canon Inc Image pickup device
JPS63296590A (en) * 1987-05-28 1988-12-02 Matsushita Electric Ind Co Ltd Color signal processing unit

Also Published As

Publication number Publication date
JPS5834476B2 (en) 1983-07-27

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