Selectively reflective polymer moulded article and a process for producing the same
US6007738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1997 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Dec 1, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention provides, in an easy manner, a film-like moulded article which shows a selective reflection of a wavelength and circularly polarized light. A suitable environment for formation of a liquid crystalline phase is prepared by forming a moulded article (thin film-like moulded article) using a cellulose derivative which can form the liquid crystalline phase (e.g. a water-insoluble cellulose derivative such as ethyl cellulose), and allowing the moulded article to absorb a highly volatile organic solvent by contact with its vapour. After formation of the liquid crystalline phase, removal of the organic solvent provides the object moulded article. The thin film-like moulded article can be employed for an optical element of a circular polarized light-generator or a decoration material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.