US 11,911,236 B2
Water-resistant polymer-based dental articles
Zeba Parkar, Marietta, GA (US); Richard E. Raby, Lino Lakes, MN (US); and James D. Hansen, White Bear Lake, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 16/632,463
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jul. 24, 2018, PCT No. PCT/US2018/043380
§ 371(c)(1), (2) Date Jan. 20, 2020,
PCT Pub. No. WO2019/023166, PCT Pub. Date Jan. 31, 2019.
Claims priority of provisional application 62/536,719, filed on Jul. 25, 2017.
Prior Publication US 2021/0153978 A1, May 27, 2021
Int. Cl. A61C 7/08 (2006.01); B33Y 80/00 (2015.01); B29C 51/14 (2006.01); B29C 51/26 (2006.01); C09D 165/04 (2006.01); B29K 33/00 (2006.01); B29L 31/00 (2006.01)
CPC A61C 7/08 (2013.01) [B29C 51/14 (2013.01); B29C 51/266 (2013.01); B33Y 80/00 (2014.12); C09D 165/04 (2013.01); A61C 2201/00 (2013.01); B29K 2033/12 (2013.01); B29L 2031/753 (2013.01); B32B 2386/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A dental article comprising:
a polymeric substrate;
a first water-resistant coating comprising parylene, wherein the first water-resistant coating is in contact with the polymeric substrate; and
an additional layer comprising an inorganic material, a polymeric hardcoat, or a combination thereof, wherein the additional layer is in contact with the first water-resistant coating; and
a second water-resistant coating comprising parylene, wherein the second water-resistant coating is in contact with the additional layer comprising an inorganic material, a polymeric hardcoat, or a combination thereof.