Optical elements comprising a polyfluoropolyether surface treatment
US6815040B2 · kind B2 · utility
31Cited by
25References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Oct 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to optical elements comprising fluorochemical surface treatments. The invention further relates to materials such as retroreflective sheetings, pavement markings and beaded projection screens comprising a binder and the surface treated optical elements. The fluorochemical surface treatment is substantially free of perfluoroalkyl groups having more than four carbon atoms. Preferably, the surface treatment is a polyfluoropolyether-based compound comprising at least one polar group or polar group-containing organic radical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.