US 12,103,846 B2
Nanostructured article
David S. Thompson, Bayport, MN (US); Chad M. Amb, Roberts, WI (US); Moses M. David, Wells, TX (US); Richard J. Pokorny, Maplewood, MN (US); Thomas P. Klun, Lakeland, MN (US); Jonah Shaver, St. Paul, MN (US); Joan M. Noyola, Maplewood, MN (US); Hannah E. Walsh, Woodbury, MN (US); Jon P. Nietfeld, Woodbury, MN (US); John A. Wheatley, Stillwater, MN (US); Joseph D. Rule, Woodbury, MN (US); Ryan M. Braun, St. Paul, MN (US); and Michael A. Johnson, Stillwater, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 17/603,071
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed May 4, 2020, PCT No. PCT/IB2020/054226
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2020/225717, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/845,081, filed on May 8, 2019.
Prior Publication US 2022/0177303 A1, Jun. 9, 2022
Int. Cl. B82B 1/00 (2006.01); B08B 17/06 (2006.01); B32B 3/30 (2006.01); B32B 27/40 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); G02B 1/18 (2015.01); G02B 27/00 (2006.01)
CPC B82B 1/005 (2013.01) [B08B 17/065 (2013.01); B32B 3/30 (2013.01); B32B 27/40 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); G02B 1/18 (2015.01); G02B 27/0006 (2013.01); B32B 2255/10 (2013.01); B32B 2307/21 (2013.01); B32B 2307/412 (2013.01); B32B 2307/712 (2013.01); B32B 2307/73 (2013.01); B32B 2307/754 (2013.01); B32B 2375/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A nanostructured article comprising:
a substrate;
a plurality of first nanostructures disposed on, and extending away from, the substrate, the plurality of first nanostructures comprising polyurethane; and
a covalently crosslinked fluorinated polymeric layer disposed on the plurality of first nanostructures and partially filling spaces between each pair of adjacent first nanostructures to an average minimum height above the substrate of at least 30 nm such that the polymeric layer comprises a nanostructured surface defined by, and facing away from, the plurality of first nanostructures,
wherein the first nanostructures extend to an average height H1 from the substrate and have an average width W1, the nanostructured surface comprising a plurality of second nanostructures having an average peak-to-valley height H2 and an average width W2, H2<0.95 H1.