JPS5592730A - Production of branched polyester - Google Patents
Production of branched polyesterInfo
- Publication number
- JPS5592730A JPS5592730A JP156779A JP156779A JPS5592730A JP S5592730 A JPS5592730 A JP S5592730A JP 156779 A JP156779 A JP 156779A JP 156779 A JP156779 A JP 156779A JP S5592730 A JPS5592730 A JP S5592730A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- intrinsic viscosity
- polyester
- prepolymer
- polyfunctional compound
- 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: A prepolymer obtained by the melt polymerization of the reaction mixture containing a specific amount of a polyfunction compound is subjected to solid phase polycondensation reaction, the producing said polyester that can suitably used in direct blow molding because of its high melt viscosity with industrial advantage.
CONSTITUTION: In the production of a branched polyester mainly containing ethylene terephthalate units, a polyfunctional compound as trimelltic acid or pentaerythritol is added so that the amount satisfies equations I and II [b is the proportion of the polyfunctional compound in the copolymer (mol%); f is the number of functions of the polyfunctional compound, 3 or 4; V is the target intrinsic viscosity of the polyester] to produce a prepolymer of 0.4W0.8 intrinsic viscosity and the resulting prepolymer is subjected to solid phase polycondensation reaction to give said polymer with the target intrinsic viscosity. When needed, less than 10mol% of a difunctional compound as isophthalic acid, neopentyl glycol may be added as a copolymer component.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP156779A JPS5592730A (en) | 1979-01-08 | 1979-01-08 | Production of branched polyester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP156779A JPS5592730A (en) | 1979-01-08 | 1979-01-08 | Production of branched polyester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5592730A true JPS5592730A (en) | 1980-07-14 |
Family
ID=11505090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP156779A Pending JPS5592730A (en) | 1979-01-08 | 1979-01-08 | Production of branched polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5592730A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63304023A (en) * | 1987-06-03 | 1988-12-12 | Toyobo Co Ltd | Production of polyester |
-
1979
- 1979-01-08 JP JP156779A patent/JPS5592730A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63304023A (en) * | 1987-06-03 | 1988-12-12 | Toyobo Co Ltd | Production of polyester |
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