JPS55339A - Isomerization of methyl-delta-4-tetrahydrophthalic anhydride - Google Patents
Isomerization of methyl-delta-4-tetrahydrophthalic anhydrideInfo
- Publication number
- JPS55339A JPS55339A JP7398278A JP7398278A JPS55339A JP S55339 A JPS55339 A JP S55339A JP 7398278 A JP7398278 A JP 7398278A JP 7398278 A JP7398278 A JP 7398278A JP S55339 A JPS55339 A JP S55339A
- Authority
- JP
- Japan
- Prior art keywords
- methyl
- tetrahydrophthalic anhydride
- isomerization
- phosphorus compound
- delta
- 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: Using a specific phosphorus compound as an isomerization catalyst, is heat treated methyl-Δ-4-tetrahydrophthalic anhydride to effect the isomerization, thus producing a liquid isomer mixture that is suitably used for a curing agent of epoxy resins.
CONSTITUTION: The isomerization of methyl-Δ-4-tetrahydrophthalic anhydride is effected by heat treating it in the presence of a phosphorus compound, in which the phosphorus compound is a compound of the formula P(X)nR3 or P(X)n(XR')3 (R is H, organic residue; R' is organic residue; X is O, S; n is 0, 1), such as triethylphosphine, triphenylphosphine, triethylphosphite. As the starting material, is suitably used a mixture of 100W20 wt% of 3-methyl-Δ-4-tetrahydrophthalic anhydride and 0W80 wt% of 4-methyl-Δ-4-tetrahydrophthalic anhydride. Preferably, the amount of the catalyst used is 0.1W4 parts by wt per 100 parts of the starting material and the reaction temperature is 80W250°C.
USE: The ingredients for unsaturated polyesters.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7398278A JPS55339A (en) | 1978-06-19 | 1978-06-19 | Isomerization of methyl-delta-4-tetrahydrophthalic anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7398278A JPS55339A (en) | 1978-06-19 | 1978-06-19 | Isomerization of methyl-delta-4-tetrahydrophthalic anhydride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55339A true JPS55339A (en) | 1980-01-05 |
| JPS6138189B2 JPS6138189B2 (en) | 1986-08-28 |
Family
ID=13533807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7398278A Granted JPS55339A (en) | 1978-06-19 | 1978-06-19 | Isomerization of methyl-delta-4-tetrahydrophthalic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55339A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59109518A (en) * | 1982-12-15 | 1984-06-25 | Hitachi Chem Co Ltd | Epoxy resin composition |
-
1978
- 1978-06-19 JP JP7398278A patent/JPS55339A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59109518A (en) * | 1982-12-15 | 1984-06-25 | Hitachi Chem Co Ltd | Epoxy resin composition |
| JPS6257652B2 (en) * | 1982-12-15 | 1987-12-02 | Hitachi Chemical Co Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6138189B2 (en) | 1986-08-28 |
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