JPS54144359A - Isomerization of methyl-delta4-tetrahydrophthalic acid anhydride - Google Patents
Isomerization of methyl-delta4-tetrahydrophthalic acid anhydrideInfo
- 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
Links
Landscapes
- Furan Compounds (AREA)
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
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)
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 |
-
1978
- 1978-05-04 JP JP5267078A patent/JPS5834476B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5834476B2 (en) | 1983-07-27 |
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