Optical elements comprising a polyfluoropolyether surface treatment
Assignee3M Innovative Properties Company
InventorsMark J. Pellerite, Susannah C. Clear, Cheryl L. S. Elsbernd, Richard M. Flynn
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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.
Claims18
An optical element having a surface treatment comprising a polyfluoropolyether compound having at least one polar group or polar group-containing organic radical.
Dependencies are inferred from the claim text.