JPS55131017A - Preparation of polyester - Google Patents
Preparation of polyesterInfo
- Publication number
- JPS55131017A JPS55131017A JP3835679A JP3835679A JPS55131017A JP S55131017 A JPS55131017 A JP S55131017A JP 3835679 A JP3835679 A JP 3835679A JP 3835679 A JP3835679 A JP 3835679A JP S55131017 A JPS55131017 A JP S55131017A
- Authority
- JP
- Japan
- Prior art keywords
- polymerizer
- polycondensed
- liquid phase
- charged
- polymer
- 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
- 229920000728 polyester Polymers 0.000 title abstract 3
- 239000007791 liquid phase Substances 0.000 abstract 3
- 229920000642 polymer Polymers 0.000 abstract 3
- 239000012535 impurity Substances 0.000 abstract 2
- 239000007790 solid phase Substances 0.000 abstract 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 abstract 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 238000005469 granulation Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 abstract 1
- 238000005979 thermal decomposition reaction Methods 0.000 abstract 1
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To obtain, at a low cost, high-quality polyesters, suitable as raw materials for films, etc., which contain a slight amount of impurities due to thermal decomposition, by polycondensing bis(ω-oxyalkylene) terephthalate to a specified degree of polymerization in liquid phase, and polycondensing the resulting polymer in solid phase after granulation.
CONSTITUTION: Bis(ω-oxyalkylen) terephthalate is charged together with catalysts and stabilizers into the initial polymerizer 11, where it is polycondensed in liquid phase at about 260W275°C, and then the resulting product is charged into the intermediate polymerizer 12, where it is polycondensed in liquid phase at about 10mmHg and about 260W275°C, until the number-average polymerizaton degree reaches about 30W60. The produced polymer is cooled and granulated into a diameter of about 0.2W2mm in the pelletizer 13, and the granules are charged into the after-polymerizer 14, where they are polycondensed in solid phase at a temperature of the melting point of the polymer or lower temp. to obtain linear condensation polyesters, containing a slight amount of impurities such as free carboxyl groups.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3835679A JPS55131017A (en) | 1979-04-02 | 1979-04-02 | Preparation of polyester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3835679A JPS55131017A (en) | 1979-04-02 | 1979-04-02 | Preparation of polyester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55131017A true JPS55131017A (en) | 1980-10-11 |
Family
ID=12522993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3835679A Pending JPS55131017A (en) | 1979-04-02 | 1979-04-02 | Preparation of polyester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55131017A (en) |
-
1979
- 1979-04-02 JP JP3835679A patent/JPS55131017A/en active Pending
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