US 12,202,998 B2
Processes for making coated films and solventless polyurethane precursors that may be used to make coated films
Juan Carlos Casarrubias, Toluca (MX); Jorge Caminero Gomes, São Paulo (BR); Nicolas Cardoso Mazzola, São Paulo (BR); Mateus Batista Torres Cipro, São Paulo (BR); Mai Chen, Chicago, IL (US); and Kevin K. Miyake, Tower Lakes, IL (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 16/973,948
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed May 22, 2019, PCT No. PCT/US2019/033503
§ 371(c)(1), (2) Date Dec. 10, 2020,
PCT Pub. No. WO2019/240922, PCT Pub. Date Dec. 19, 2019.
Claims priority of provisional application 62/683,356, filed on Jun. 11, 2018.
Prior Publication US 2021/0246332 A1, Aug. 12, 2021
Int. Cl. C09D 175/08 (2006.01); C08G 18/12 (2006.01); C08G 18/32 (2006.01); C08G 18/40 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); C08G 18/79 (2006.01)
CPC C09D 175/08 (2013.01) [C08G 18/12 (2013.01); C08G 18/3206 (2013.01); C08G 18/4018 (2013.01); C08G 18/4238 (2013.01); C08G 18/4825 (2013.01); C08G 18/4891 (2013.01); C08G 18/6674 (2013.01); C08G 18/7671 (2013.01); C08G 18/797 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A process for making a coated film, the process comprising:
applying an uncured polyurethane precursor between a polyolefin film and a release liner such that a first surface of the release liner is in contact with the uncured polyurethane precursor, wherein the first surface of the release liner has an optical finish;
curing the uncured polyurethane precursor to form a cured polyurethane layer positioned between the polyolefin film and the release liner, wherein:
the curing imparts an optical finish to the cured polyurethane layer substantially similar to the optical finish of the first surface of the release liner, and
the uncured polyurethane precursor comprises an isocyanate-reactive component comprising at least one bio-based polyol; and
removing the release liner to form the coated film comprising the polyolefin film and the cured polyurethane layer.