Optical articles comprising isosorbide polyesters and method for making same
US6126992A · kind A · utility
93Cited by
87References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Apr 23, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical article made of a transparent polymer which includes terephthaloyl moieties, optionally, other aromatic diacid moieties; ethylene glycol moieties; isosorbide moieties; and, optionally, one or more other diol moieties, wherein the polymer has an inherent viscosity of at least about 0.35 dL/g as measured on a 1% solution (weight/volume) in o-chlorophenol at 25.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.