Polycarbonate resin composition optical recording medium, and substrate therefor
US6407199B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2001 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2534
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polycarbonate resin composition which is excellent in thermal stability such as color retention at the time of melt molding, for example, the prevention of yellowing, and moldability such as releasability and transferability and therefore particularly suitable for the production of precision optical moldings such as optical disk substrates and lenses. The polycarbonate resin composition comprises (A) an aromatic polycarbonate, and (B) a cyclic carbonate compound, a monoester compound of a divalent aliphatic alcohol having 3 to 14 carbon.atoms and an aliphatic monocarboxylic acid having 12 to 24 carbon atoms, or an ether compound obtained by converting at least one hydroxyl group of a polyvalent aliphatic alcohol having 3 to 14 carbon atoms into an aliphatic oxy group having 1 to 18 carbon atoms, or (C) a partial ester compound of an aliphatic alcohol having a valence of 2 to 6 and 2 to 14 carbon atoms and an aliphatic monocarboxylic acid having 12 to 24 carbon atoms, a cyclic phenol compound or a compound selected from hydrochloric acid, phosphoric acid, phosphorous acid, boric acid, and amine salts and ammonium salts thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.