JPS56104928A - Preparation of polyester - Google Patents
Preparation of polyesterInfo
- Publication number
- JPS56104928A JPS56104928A JP628680A JP628680A JPS56104928A JP S56104928 A JPS56104928 A JP S56104928A JP 628680 A JP628680 A JP 628680A JP 628680 A JP628680 A JP 628680A JP S56104928 A JPS56104928 A JP S56104928A
- Authority
- JP
- Japan
- Prior art keywords
- glycol
- distilled
- condenser
- outlet
- cooling water
- 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
Abstract
PURPOSE: To prevent the vacuum circuit of a condensation polymerization system from being clogged and to prevent the glycol distilled from escaping, by specifying the temperature of the cooling water at the outlet of a condenser for the distillate, in the condensation polymerization of a glycol ester of a discarboxylic acid.
CONSTITUTION: In the preparation of a polyester by the batchwise condensation polymerization of a glycol ester of a discarboxylic acid, the peak temperature of the cooling water at the outlet of a condenser for the glycol distilled, is adjusted to be 40W100°C. When the peak temperature of the cooling water at the outlet of said condenser <40°C, it causes the clogging of the vacuum circuit because a glycol ester or a low polymer thereof is inefficiently caught by the glycol distilled. Said temperature over 100°C is undesirable because the distilled glycol itself is not condensable and escapes out of the system through the vacuum circuit.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP628680A JPS56104928A (en) | 1980-01-24 | 1980-01-24 | Preparation of polyester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP628680A JPS56104928A (en) | 1980-01-24 | 1980-01-24 | Preparation of polyester |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56104928A true JPS56104928A (en) | 1981-08-21 |
JPH0331727B2 JPH0331727B2 (en) | 1991-05-08 |
Family
ID=11634141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP628680A Granted JPS56104928A (en) | 1980-01-24 | 1980-01-24 | Preparation of polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56104928A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6673438B1 (en) | 1994-05-03 | 2004-01-06 | Cardinal Cg Company | Transparent article having protective silicon nitride film |
-
1980
- 1980-01-24 JP JP628680A patent/JPS56104928A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6673438B1 (en) | 1994-05-03 | 2004-01-06 | Cardinal Cg Company | Transparent article having protective silicon nitride film |
US6942917B2 (en) | 1994-05-03 | 2005-09-13 | Cardinal Cg Company | Transparent article having protective silicon nitride film |
US7101810B2 (en) | 1994-05-03 | 2006-09-05 | Cardinal Cg Company | Transparent article having protective silicon nitride film |
Also Published As
Publication number | Publication date |
---|---|
JPH0331727B2 (en) | 1991-05-08 |
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