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US 6,582,790 B2Granted
Polyolefin bound ultraviolet light absorbers
Assignee3M Innovative Properties Company
InventorsDavid B. Olson, David M. Burns
Life of this patent
Estimating the term…
Abstract
Oligomeric materials contain ultraviolet light absorbing compounds that are covalently bound to the oligomer backbone through an ester or amide linkage. These ultraviolet light absorbing oligomers may be combined with polymers such as polyolefins to provide protection against the harmful effects of ultraviolet light.
Claims7
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 oligomer comprising the reaction product of a carboxyl functional oligomer and an ultraviolet absorbing compound of formula (I) or (IV);
- wherein each R1 is independently halogen, hydroxy, straight-chain or branched C1-12 alkyl, straight-chain or branched C2-12 alkenyl, straight-chain or branched C1-12 alkoxy, straight-chain or branched C2-12 alkenyloxy, straight-chain or branched C1-12 alkanol, amino, straight-chain or branched C1-12 alkylamino, or straight-chain or branched C1-12 dialkylamino;
- Y is a C1-18 alkylene of C2-18 alkenylene group which may be straight-chain or branched and which may be interrupted by one or more
- wherein each R2 is independently H or C1-6 alkyl that may be straight-chain or branched;
- and Z is —OH;
- (b) a base layer comprising a deformable thermoplastic polymer and a nonreinforcing mineral particular;
- (c) a pressure sensitive adhesive layer;
- and
- (d) a release liner.
6 more elements
Dependencies are inferred from the claim text.