US 12,001,036 B2
Multilayer optical films and articles comprising the same
Timothy J. Hebrink, Scandia, MN (US); Stephen P. Maki, North St. Paul, MN (US); Charles D. Hoyle, Stillwater, MN (US); Joel D. Oxman, Minneapolis, MN (US); Matthew T. Scholz, Woodbury, MN (US); Justin M. Mazzoni, Cheshire, CT (US); Michael E. Griffin, Maplewood, MN (US); and Anna C. Hamlin, Lino Lakes, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 17/280,447
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Sep. 25, 2019, PCT No. PCT/IB2019/058145
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/070589, PCT Pub. Date Apr. 9, 2020.
Claims priority of provisional application 62/741,886, filed on Oct. 5, 2018.
Prior Publication US 2022/0003904 A1, Jan. 6, 2022
Int. Cl. G02B 5/20 (2006.01); C08K 3/28 (2006.01); C08L 23/08 (2006.01); C08L 27/18 (2006.01); G02B 1/04 (2006.01); G02B 1/115 (2015.01); G02B 19/00 (2006.01)
CPC G02B 5/208 (2013.01) [C08K 3/28 (2013.01); C08L 23/08 (2013.01); C08L 27/18 (2013.01); G02B 1/04 (2013.01); G02B 1/115 (2013.01); C08L 2201/10 (2013.01); C08L 2203/20 (2013.01); G02B 19/0095 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A multilayer optical film comprising at least a plurality of alternating first and second optical layers collectively reflecting at least one of 0°, 30°, 45°, 60°, or 75° incident light angle at least 30 percent of incident ultraviolet light over at least a 30-nanometer wavelength reflection bandwidth in a wavelength range from at least 100 nanometers to 280 nanometers,
wherein the at least first optical layer comprises at least one polyethylene copolymer, and wherein the second optical layer comprises at least one of a copolymer comprising tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, a copolymer comprising tetrafluoro-ethylene and hexafluoropropylene, or perfluoroalkoxy alkane.