| 摘要 |
The present invention relates to optical elements comprising fluorochemical surface treatments having the general structure Rf-[G]m(CH2)n-X wherein Rf is a fluorinated alkyl group, G is a divalent linking group selected from oxygen (-O-) and sulfonamido (-SO2R-), m is an integer ranging from 0 to 1, n is an integer ranging from 1 to 24, and X is polar group or polar group containing radical. 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.
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