JPS57131225A - Purification of polycarbonate solution - Google Patents
Purification of polycarbonate solutionInfo
- Publication number
- JPS57131225A JPS57131225A JP1690881A JP1690881A JPS57131225A JP S57131225 A JPS57131225 A JP S57131225A JP 1690881 A JP1690881 A JP 1690881A JP 1690881 A JP1690881 A JP 1690881A JP S57131225 A JPS57131225 A JP S57131225A
- Authority
- JP
- Japan
- Prior art keywords
- diatomaceous earth
- polycarbonate solution
- solution
- filter layer
- filter
- 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
- 229920000515 polycarbonate Polymers 0.000 title abstract 6
- 239000004417 polycarbonate Substances 0.000 title abstract 6
- 238000000746 purification Methods 0.000 title 1
- 239000005909 Kieselgur Substances 0.000 abstract 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 5
- 239000012535 impurity Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To obtain a color-free highly purified polycarbonate solution capable of providing thermally stable moldings, by further filtering a polycarbonate solution which has been free from water-soluble impurities through a diatomaceous earth-containing filter layer.
CONSTITUTION: A polycarbonate solution is produced, for example, by a method comprising reacting a dihydroxydiarylalkane with phosgene, and the impurities are removed, for example, by a method including washing of the solution with an aqueous washing liquid. Then, the purpose highly purified polycarbonate solution is obtained by adjusting the viscosity of the polycarbonate solution to below about 300cP and feeding and passing the solution through a filter layer usually containing above 10% diatomaceous earth. As the filter layer containing diatomaceous earth, there is used a filter medium consisting of a combination of diatomaceous earth and cellulose or a filter layer containing diatomaceous earth as a filter acid.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1690881A JPS57131225A (en) | 1981-02-09 | 1981-02-09 | Purification of polycarbonate solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1690881A JPS57131225A (en) | 1981-02-09 | 1981-02-09 | Purification of polycarbonate solution |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57131225A true JPS57131225A (en) | 1982-08-14 |
JPS6340210B2 JPS6340210B2 (en) | 1988-08-10 |
Family
ID=11929229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1690881A Granted JPS57131225A (en) | 1981-02-09 | 1981-02-09 | Purification of polycarbonate solution |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57131225A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6424829A (en) * | 1987-07-21 | 1989-01-26 | Mitsubishi Gas Chemical Co | Polycarbonate molding material for optical disc |
JP2003026792A (en) * | 2001-07-16 | 2003-01-29 | Teijin Chem Ltd | Process for producing purified polycarbonate resin |
-
1981
- 1981-02-09 JP JP1690881A patent/JPS57131225A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6424829A (en) * | 1987-07-21 | 1989-01-26 | Mitsubishi Gas Chemical Co | Polycarbonate molding material for optical disc |
JP2003026792A (en) * | 2001-07-16 | 2003-01-29 | Teijin Chem Ltd | Process for producing purified polycarbonate resin |
Also Published As
Publication number | Publication date |
---|---|
JPS6340210B2 (en) | 1988-08-10 |
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