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US 7,718,264 B2Granted
Perfluoropolyether urethane additives having (meth)acryl groups and hard coats
Assignee3M Innovative Properties Company
InventorsThomas P. Klun, Naiyong Jing, Richard J. Pokorny, Zai-Ming Qiu, Mark J. Pellerite, William D. Coggio, Christopher B. Walker, Jr.
Life of this patent
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Abstract
Fluorocarbon- and urethane-(meth)acryl-containing additives and hardcoats. The hardcoats are particularly useful as a surface layer on an optical device.
Claims23
An optical display comprising:
- an optical substrate having a surface layer comprising the reaction product of a mixture comprising
- i) at least one non-fluorinated crosslinking agent, and
- ii) at least one perfluoropolyether urethane having a perfluoropolyether moiety and a terminal group having at least two (meth)acryl groups;
- a hardcoat layer comprising inorganic oxide particles disposed between the substrate and the surface layer.
1 more element
Dependencies are inferred from the claim text.