JPS5540704A - Preparation of polyester having improved transparency - Google Patents
Preparation of polyester having improved transparencyInfo
- Publication number
- JPS5540704A JPS5540704A JP11238078A JP11238078A JPS5540704A JP S5540704 A JPS5540704 A JP S5540704A JP 11238078 A JP11238078 A JP 11238078A JP 11238078 A JP11238078 A JP 11238078A JP S5540704 A JPS5540704 A JP S5540704A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- germanium
- polyester
- acid component
- preparation
- 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
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To prepare a polyester useful for injection molding, etc. and giving a thick molded article having excellent transparency, by carrying out the polycondensation reaction in the presence of a germanium compound, an amine compound and a specific diol compound.
CONSTITUTION: 1Mol of a germanium compound, e.g. germanium dioxide, is dissolved in 0.3W1mol of a tertiary or quaternary amine, e.g. trimethylamine, which vaporizes at ≤280°C. The mixture is added to the product prepared by esterifying an acid component consisting mainly of terephthalic acid with ethylene glycol, wherein the amount of the germanium compound is 0.005W0.2mol% on the basis of the acid component. Pref. 0.1W10wt%, based on the resultant polymer, of a compound expressed by the formula (n=5W12), e.g. 1,6-hexanediol, etc., is further added and the composition is subjected to polycondensation to give the desired polyester.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11238078A JPS5540704A (en) | 1978-09-14 | 1978-09-14 | Preparation of polyester having improved transparency |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11238078A JPS5540704A (en) | 1978-09-14 | 1978-09-14 | Preparation of polyester having improved transparency |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5540704A true JPS5540704A (en) | 1980-03-22 |
JPS6150093B2 JPS6150093B2 (en) | 1986-11-01 |
Family
ID=14585220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11238078A Granted JPS5540704A (en) | 1978-09-14 | 1978-09-14 | Preparation of polyester having improved transparency |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5540704A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998058009A1 (en) * | 1997-06-18 | 1998-12-23 | Cook Composites And Polymers Company | Polyester synthesis using catalysts having low decomposition temperatures |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113645923B (en) | 2019-03-28 | 2022-08-09 | 射场信行 | Angle adjusting workbench device for dental technician |
-
1978
- 1978-09-14 JP JP11238078A patent/JPS5540704A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998058009A1 (en) * | 1997-06-18 | 1998-12-23 | Cook Composites And Polymers Company | Polyester synthesis using catalysts having low decomposition temperatures |
Also Published As
Publication number | Publication date |
---|---|
JPS6150093B2 (en) | 1986-11-01 |
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