Optical element and optical polycarbonate resin composition for the preparation thereof
US4495345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1983 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Mar 11, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An optical element including an optical resin composition consisting essentially of a polycarbonate is disclosed. Said optical resin composition have a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard under the condition of 230.degree. C. and 5 kgf. and have a glass transition point of more than or equal to 100.degree. C. Said polycarbonate include a major repeating unit represented by the formula (I) or (II). ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represent an arylene group or a cycloalkylene group; R represents an alkylene group, a cycloalkylene group, --O--, --O--Ar.sub.3 --O--, --S--, --SO--, --SO.sub.2 --, --SO.sub.2 --Ar.sub.3 --SO.sub.2 --, --R.sub.1 --Ar.sub.4 --R.sub.1 --, --O--R.sub.1 --O--, ##STR2## --CONH--R.sub.1 --NHCO--, or --Ar.sub.5 --R.sub.1 --; Ar.sub.3 and Ar.sub.4 each represent a phenylene group or a bisphenylene group; R.sub.1 represents an alkylene group; R.sub.2 represents an alkyl group; Ar.sub.5 represents a cycloalkylene group, --R.sub.1 --Ar.sub.4 --R.sub.1 --, --R.sub.1 --Ar.sub.5 --R.sub.1 --, --R.sub.1 --O--Ar.sub.4 --O--R.sub.1 --, or --R.sub.1 --O--Ar.sub.4 --X--Ar.sub.4 --O--R.sub.1 ; and X repres…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.