US 12,221,539 B2
Thermoplastic polyurethane compounds exhibiting enhanced stain resistance
Jiren Gu, Crystal Lake, IL (US)
Assigned to Avient Corporation, Avon Lake, OH (US)
Appl. No. 17/420,878
Filed by Avient Corporation, Avon Lake, OH (US)
PCT Filed Jan. 7, 2020, PCT No. PCT/US2020/012499
§ 371(c)(1), (2) Date Jul. 6, 2021,
PCT Pub. No. WO2020/146323, PCT Pub. Date Jul. 16, 2020.
Claims priority of provisional application 62/790,319, filed on Jan. 9, 2019.
Prior Publication US 2022/0064441 A1, Mar. 3, 2022
Int. Cl. C08L 75/06 (2006.01); C08L 75/08 (2006.01); B29C 45/14 (2006.01); B29K 75/00 (2006.01); B29K 105/00 (2006.01)
CPC C08L 75/06 (2013.01) [C08L 75/08 (2013.01); B29C 45/14 (2013.01); B29K 2075/00 (2013.01); B29K 2105/0044 (2013.01); C08L 2203/20 (2013.01)] 11 Claims
 
1. A thermoplastic article molded from a thermoplastic polyurethane compound, the thermoplastic polyurethane compound comprising:
100 parts by weight of thermoplastic polyurethane selected from blends of aliphatic polycaprolactone thermoplastic polyurethane and aromatic thermoplastic polyurethane selected from aromatic polyester thermoplastic polyurethane, aromatic polyether thermoplastic polyurethane, and combinations thereof, wherein from about 10 to about 50 parts by weight is the aliphatic polycaprolactone thermoplastic polyurethane and from about 50 to about 90 parts by weight is the aromatic thermoplastic polyurethane;
wherein the thermoplastic polyurethane compound is free of aromatic polycaprolactone thermoplastic polyurethane;
wherein the thermoplastic polyurethane compound has a Shore A hardness in the range of 70 to 81;
wherein the thermoplastic article achieves a rating of 2 or better according to Blue Jean Abrasion Test; and
wherein the thermoplastic article is a protective case or portion thereof for a handheld electronic device.