JPS6475523A - Polycarbonate copolymer - Google Patents
Polycarbonate copolymerInfo
- Publication number
- JPS6475523A JPS6475523A JP62234391A JP23439187A JPS6475523A JP S6475523 A JPS6475523 A JP S6475523A JP 62234391 A JP62234391 A JP 62234391A JP 23439187 A JP23439187 A JP 23439187A JP S6475523 A JPS6475523 A JP S6475523A
- Authority
- JP
- Japan
- Prior art keywords
- copolymer
- bisphenol
- unit
- dihydric phenolic
- formula
- 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
- Thermal Transfer Or Thermal Recording In General (AREA)
- Polyesters Or Polycarbonates (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE:To obtain the titled copolymer of small photoelastic constant outstanding in mechanical properties, heat resistance and transparency, useful for optical information recording discs etc., by using as the dihydric phenolic components, a specific dihydric phenolic compound and bisphenol M. CONSTITUTION:The objective copolymer with a viscosity-average mol.wt. of pref. 13,000-50,000 constituted of recurring units of formulas I and II, respectively, with the molar ratio of the unit I to the unit II being 1:99-99:1. It is suggested that this copolymer be obtained by e.g. ester interchange process using diphenyl carbonate to bring 1,1-bis(4-hydroxy-3-t-butylphenyl)-1-phenylethane of formula III and bisphenol M of formula IV to carbonate linkage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62234391A JP2513725B2 (en) | 1987-09-18 | 1987-09-18 | Polycarbonate copolymer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62234391A JP2513725B2 (en) | 1987-09-18 | 1987-09-18 | Polycarbonate copolymer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6475523A true JPS6475523A (en) | 1989-03-22 |
JP2513725B2 JP2513725B2 (en) | 1996-07-03 |
Family
ID=16970264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62234391A Expired - Lifetime JP2513725B2 (en) | 1987-09-18 | 1987-09-18 | Polycarbonate copolymer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2513725B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01178519A (en) * | 1988-01-11 | 1989-07-14 | Daicel Chem Ind Ltd | Resin for optical material |
-
1987
- 1987-09-18 JP JP62234391A patent/JP2513725B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01178519A (en) * | 1988-01-11 | 1989-07-14 | Daicel Chem Ind Ltd | Resin for optical material |
Also Published As
Publication number | Publication date |
---|---|
JP2513725B2 (en) | 1996-07-03 |
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