UV light absorbing material comprising a carboxylic polymer and an amide compound, films, products, and methods of use
Assignee3M Innovative Properties Company
InventorsDavid B. Olson, David M. Burns
Life of this patent
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Abstract
An ultraviolet light absorbing material that resists blooming and migration is made up of a carboxyl functional polymer and an amide functional ultraviolet light absorbing compound, wherein the carboxyl functional polymer and the amide functional ultraviolet light absorbing compound are hydrogen bonded to one another. Polymeric films that contain a polyolefin and the ultraviolet light absorbing material are useful as the top layer in multilayer constructions such as retroreflective sheetings and conformable marking sheets.
Claims26
A polymeric film comprising a polyolefin and an ultraviolet light absorbing material, said ultraviolet light absorbing material comprising a carboxyl functional polymer and an amide functional ultraviolet light absorbing compound, wherein the amide functional ultraviolet light absorbing compound is hydrogen-bonded to the carboxyl functional polymer and there is at least 1 hydrogen bonding site on the polymer per mole of ultraviolet light absorbing compound.
A method of protecting a substrate from the effects of ultraviolet light, the method comprising applying a polymeric film to the substrate, said film comprising a polyolefin and an ultraviolet light absorbing material, said ultraviolet light absorbing material comprising a carboxyl-functional polymer and an amide functional ultraviolet light absorbing compound, wherein the ultraviolet light absorbing compound is hydrogen bonded to the carboxyl-functional polymer and there is at least one hydrogen bonding site on the polymer per mole of ultraviolet light absorbing compound.
A conformable marking sheet comprising:
- (a) a top polymeric film layer having glass microspheres and skid resistant particles partially embedded therein, the film comprising a polyolefin and an ultraviolet light absorbing material, the ultraviolet light material comprising a carboxyl functional polymer and an amide functional ultraviolet light absorbing compound, wherein the amide functional ultraviolet light absorbing compound is hydrogen bonded to the carboxyl functional polymer and there is at least one hydrogen bonding site on the polymer per mole of ultraviolet light absorbing compound;
- (b) a base layer;
- and
- (c) an adhesive layer.
An enclosed-lens retroreflective sheeting comprising a layer of retroreflective elements and a top layer comprising a polymeric film, said film comprising a polyolefin and an ultraviolet light absorbing material, said ultraviolet light absorbing material comprising a carboxyl functional polymer and an amide functional ultraviolet light absorbing compound, wherein the amide functional ultraviolet light absorbing compound is hydrogen-bonded to the carboxyl functional polymer and there is at least 1 hydrogen bonding site on the polymer per molecule of ultraviolet light absorbing compound.
Dependencies are inferred from the claim text.