Retroflective articles including a cured ceramer composite coating having abrasion and stain resistant characteristics
Assignee3M Innovative Properties Company
InventorsSoonkun Kang, John L. Ethen, Gregory E. Gilligan, Christopher J. Gustafson, Sithya Seda Khieu, Kanta Kumar, Thomas W. Rambosek, Tzu Li Joseph Huang
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Abstract
A retroreflective article comprising a substrate and a cured ceramer coating provided on at least a portion of a surface of the substrate. The coated portion of the surface is retroreflective and can be dew-resistant. The ceramer is derived from a free-radically-curable binder, colloidal inorganic oxide and fluoro/silane component comprising a hydrolyzable silane moiety and a fluorinated moiety.
Claims18
A retroreflective article, comprising a substrate and a coating provided on at least a portion of a surface of the substrate, the coated portion being retroreflective and the coating comprising a cured ceramer derived from ingredients comprising:
- (a) free-radically-curable binder;
- (b) colloidal inorganic oxide;
- and
- (c) fluoro/silane that comprised a hydrolyzable silane moiety and a fluorinated moiety.
A method of coating a retroreflective substrate with a ceramer coating, comprising the steps of:
- (a) stripping water from a mixture comprising
- (i) colloidal inorganic oxide sol that is surface treated with a fluoro/silane that comprised a hydrolyzable silane moiety and a fluorinated moiety and
- (ii) free-radically-curable binder;
- (b) coating the stripped composition onto a retroreflective substrate;
- and
- (c) curing the coating to form a ceramer coating on the substrate.
Dependencies are inferred from the claim text.