JPS6431824A - Polycarbonate polymer - Google Patents
Polycarbonate polymerInfo
- Publication number
- JPS6431824A JPS6431824A JP62187352A JP18735287A JPS6431824A JP S6431824 A JPS6431824 A JP S6431824A JP 62187352 A JP62187352 A JP 62187352A JP 18735287 A JP18735287 A JP 18735287A JP S6431824 A JPS6431824 A JP S6431824A
- Authority
- JP
- Japan
- Prior art keywords
- bisphenol
- polymer
- constituted
- recurring units
- bisphenoles
- 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 provide the titled polymer of no crystallinity, small in light scattering, also outstanding in thermal stability and transparency, useful for the production of e.g. optical discs, lenses, etc., constituted of recurring units derived from each specific bisphenol. CONSTITUTION:The objective polymer constituted of recurring units of respective formulas I and II (X is single bond, C1-6-alkylene, etc., R1-R4 are each H, alkyl, etc.) with the molar fraction of the unit I being 1-100% and viscosity- average molecular weight (on a bisphenol A type polycarbonate basis) of 5,000-100,000. This polymer can be obtained, for example, by dissolving a mixture of 3,4'-(1-methyl ethylidene) bisphenol and various bisphenoles in an aqueous NaOH solution followed by adding dichloromethane to the system and also introducing phosgene to carry out condensation reaction at <=30 deg.C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62187352A JP2655845B2 (en) | 1987-07-27 | 1987-07-27 | Optical glass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62187352A JP2655845B2 (en) | 1987-07-27 | 1987-07-27 | Optical glass |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6431824A true JPS6431824A (en) | 1989-02-02 |
JP2655845B2 JP2655845B2 (en) | 1997-09-24 |
Family
ID=16204490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62187352A Expired - Lifetime JP2655845B2 (en) | 1987-07-27 | 1987-07-27 | Optical glass |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2655845B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5152811A (en) * | 1991-12-20 | 1992-10-06 | The Dow Chemical Company | Meta, para-bisphenol based polymer gas separation membranes |
WO2001032744A1 (en) * | 1999-11-01 | 2001-05-10 | General Electric Company | Polycarbonates suitable for use in optical articles |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5598229A (en) * | 1978-12-06 | 1980-07-26 | Gen Electric | Thermoplastic organic polymer |
JPS60238319A (en) * | 1984-05-14 | 1985-11-27 | Mitsui Toatsu Chem Inc | Purification of aromatic polycarbonate |
JPS62158719A (en) * | 1986-01-07 | 1987-07-14 | Daicel Chem Ind Ltd | Production of polycarbonate by melt process |
-
1987
- 1987-07-27 JP JP62187352A patent/JP2655845B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5598229A (en) * | 1978-12-06 | 1980-07-26 | Gen Electric | Thermoplastic organic polymer |
JPS60238319A (en) * | 1984-05-14 | 1985-11-27 | Mitsui Toatsu Chem Inc | Purification of aromatic polycarbonate |
JPS62158719A (en) * | 1986-01-07 | 1987-07-14 | Daicel Chem Ind Ltd | Production of polycarbonate by melt process |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5152811A (en) * | 1991-12-20 | 1992-10-06 | The Dow Chemical Company | Meta, para-bisphenol based polymer gas separation membranes |
WO2001032744A1 (en) * | 1999-11-01 | 2001-05-10 | General Electric Company | Polycarbonates suitable for use in optical articles |
Also Published As
Publication number | Publication date |
---|---|
JP2655845B2 (en) | 1997-09-24 |
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