Claims
- 1. A process for the production of a diphenol monoester of carboxylic acid comprising reacting one or more carboxylic acid with one or more high-molecular weight polycarbonate using 0.001 to 10% relative to the weight of said acid and said polycarbonate of a catalyst selected from the group consisting of 5-membered heterocyclic compounds, amidines, salts of tertiary organic amines, trialkyl ammonium hydroxide, tetraalkyl ammonium hydroxide, and oxides, hydroxides, alcoholates, carbonates, sulphonates, and phosphonates, of alkali metals at a temperature between 150.degree. C. and 350.degree. C., CO.sub.2 being split off, in which one diphenol polycarbonate equivalent is employed per carboxylic acid group of the carboxylic acid employed.
- 2. A process according to claim 1, in which the catalyst is used in an amount of 0.01 to 1% by weight based on the total weight of the reaction mixture employed.
- 3. A process according to claim I or 2, in which the reaction is carried out at a temperature between 180.degree. C. and 250.degree. C.
- 4. A process for the production of a diphenol monoester of carboxylic acid comprising reacting one or more carboxylic acid with one or more high-molecular weight polycarbonate using 0.001 to 10% relative to the weight of said acid and said carbonate of a five membered heterocyclic compound as a catalyst at a temperature between 150.degree. C. and 350.degree. C., CO.sub.2 being split off, in which one diphenol polycarbonate equivalent is employed per carboxylic acid group of the carboxylic acid employed.
- 5. The process of claim 4 wherein temperature is between 180.degree. C. and 250.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3320260 |
Jun 1983 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 616,341 filed June 1, 1984, now abandoned.
US Referenced Citations (11)
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Continuations (1)
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Number |
Date |
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Parent |
616341 |
Jun 1984 |
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