Thermoplastic polyurethane compounds exhibiting enhanced stain resistance
AssigneeAvient Corporation
InventorJiren GU
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Abstract
Thermoplastic articles are molded from thermoplastic polyurethane compounds including aromatic polycaprolactone thermoplastic polyurethane. The thermoplastic articles exhibit enhanced stain resistance, as represented by achieving a rating of 1 according to Blue Jean Abrasion Test, relative to thermoplastic articles molded from thermoplastic polyurethane compounds including other types of thermoplastic polyurethanes, while also having good clarity (i.e., low haze) and other desirable properties. The thermoplastic articles can be especially useful as protective cases for handheld electronic devices.
Claims15
A thermoplastic article molded from a thermoplastic polyurethane compound, the thermoplastic polyurethane compound comprising:
- 100 parts by weight of thermoplastic polyurethane selected from aromatic polycaprolactone thermoplastic polyurethane;
- wherein the thermoplastic polyurethane compound is free of aliphatic polycaprolactone thermoplastic polyurethane;
- and
- wherein the thermoplastic article achieves a rating of 1 according to Blue Jean Abrasion Test.
A method of improving resistance to Blue Jean Staining for a thermoplastic article molded from a thermoplastic polyurethane compound comprising 100 parts by weight of thermoplastic polyurethane, the method comprising the step of:
- selecting the thermoplastic polyurethane from aromatic polycaprolactone thermoplastic polyurethane;
- wherein the thermoplastic polyurethane compound is free of aliphatic polycaprolactone thermoplastic polyurethane;
- and
- wherein the thermoplastic article achieves a rating of 1 according to Blue Jean Abrasion Test.
Dependencies are inferred from the claim text.