JPS57190020A - Preparation of polyester - Google Patents
Preparation of polyesterInfo
- Publication number
- JPS57190020A JPS57190020A JP7482981A JP7482981A JPS57190020A JP S57190020 A JPS57190020 A JP S57190020A JP 7482981 A JP7482981 A JP 7482981A JP 7482981 A JP7482981 A JP 7482981A JP S57190020 A JPS57190020 A JP S57190020A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- polyester
- molar ratio
- acid
- aromatic dicarboxylic
- 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.)
- Pending
Links
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To prepare a polyester having high hydrolytic stability, by adding a trivalent phosphorus compound in the course of the esterification of an aromatic dicarboxylic acid with an alkylene glycol using an organic tin compound as a catalyst, thereby deactivating the catalyst, and then carrying out the polymerization using another catalyst.
CONSTITUTION: An aromatic dicarboxylic acid (e.g. terephthalic acid) and an alkylene glycol (e.g. ethylene glycol) are mixed together at a molar ratio of 1: (1.05W5), and esterified at 180W280°C in the presence of 0.01W0.3wt%, based on terephthalic acid, of an organic tin compound (e.g. butyltin hydroxyoxide) as a catalyst. When the conversion reaches ≥70%, the catalyst is deactivated by adding a trivalent phosphorus compound (e.g. phosphorous acid) at a molar ratio (P/Sn) of (0.1W5)/1, preferably (0.5W3)/1 and reacting at 180W280°C for 10min W3hr. A catalyst (e.g. tetrabutyl titanate) is added to the mixture, and the polycondensation reaction is carried out at 200W300°C under a pressure of ≤1mmHg to obtain the objective polyester.
USE: Parts for automobile, electrical appliance, etc.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7482981A JPS57190020A (en) | 1981-05-20 | 1981-05-20 | Preparation of polyester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7482981A JPS57190020A (en) | 1981-05-20 | 1981-05-20 | Preparation of polyester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57190020A true JPS57190020A (en) | 1982-11-22 |
Family
ID=13558602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7482981A Pending JPS57190020A (en) | 1981-05-20 | 1981-05-20 | Preparation of polyester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57190020A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4715104A (en) * | 1971-01-02 | 1972-08-18 | ||
| JPS4912913A (en) * | 1972-05-15 | 1974-02-04 | ||
| JPS5232670A (en) * | 1975-09-08 | 1977-03-12 | Mitsubishi Electric Corp | Flip chip solder bump |
| JPS54105196A (en) * | 1978-02-06 | 1979-08-17 | Hitachi Ltd | Preparation of polyester |
-
1981
- 1981-05-20 JP JP7482981A patent/JPS57190020A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4715104A (en) * | 1971-01-02 | 1972-08-18 | ||
| JPS4912913A (en) * | 1972-05-15 | 1974-02-04 | ||
| JPS5232670A (en) * | 1975-09-08 | 1977-03-12 | Mitsubishi Electric Corp | Flip chip solder bump |
| JPS54105196A (en) * | 1978-02-06 | 1979-08-17 | Hitachi Ltd | Preparation of polyester |
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