A THERMOPLASTIC POLYURETHANE RESIN COMPOSITION

1 . A thermoplastic polyurethane resin composition comprising:

a thermoplastic polyurethane resin;

an ultraviolet absorber package comprising a benzotriazole compound (UVA1), and a triazine compound (UVA2) wherein the mass ratio of UVA1 to UVA2 is from 1:1 to 3:1; optionally, a hindered amine light stabilizer and/or an antioxidant compound; and

wherein the thermoplastic polyurethane resin composition has a maximum ultraviolet transmittance of ≤3% in the wavelengths between 280 nm and 365 nm and an ultraviolet transmittance of ≤6% in the wavelengths between 365 nm and 370 nm when the thermoplastic polyurethane resin composition is formed into a film having a thickness of 6 mils and wherein the cumulative weight % of UVA1 and UVA2 in the polyurethane resin composition ranges from 0.5 wt % to 0.85 wt % based on the total weight of the polyurethane resin composition.

2 . The method according to claim 1 , wherein the maximum ultraviolet transmittance is measured by the UV-VIS SPEC TEST.

3 . The thermoplastic polyurethane resin according to claim 1 , wherein the ultraviolet absorber package further comprises an oxanilide compound (UVA3).

4 . The thermoplastic polyurethane resin according to claim 3 , wherein the mass ratio of UVA1 to UVA2 to UVA3 is from 1:1:0.2 to 3:1:1.

5 . The thermoplastic polyurethane resin composition according to claim 1 , wherein the film has a maximum ultraviolet transmittance of ≤2% in the wavelengths between 280 nm and 365 nm and a maximum ultraviolet transmittance of ≤4% in the wavelengths between 365 nm and 370 nm.

6 . The thermoplastic polyurethane resin composition according to claim 1 , wherein the polyurethane resin comprises the reaction product of an isocyanate compound; a polyol compound; and a chain extender compound.

7 . The thermoplastic polyurethane resin composition according to claim 1 , wherein the film is applied onto a coated substrate.

8 . The thermoplastic polyurethane resin composition according to claim 7 , wherein the coated substrate is coated with one or more paint layers.

9 . The thermoplastic polyurethane resin composition according to claim 10 , wherein the one or more paint layers is a clear coat and the film is applied onto a surface of the clear coat.

10 . A method for making a thermoplastic polyurethane resin, the method comprising:

reacting a mixture comprising an isocyanate compound, an isocyanate reactive compound, and a chain extender compound to form the thermoplastic polyurethane resin; wherein the mixture further comprises an antioxidant compound and an ultraviolet absorber package comprising a hindered amine light stabilizer compound, a benzotriazole compound (UVA1), and a traizine compound (UVA2) wherein the mass ratio of UVA1 to UVA2 is from 1:1 to 3:1; and

wherein the thermoplastic polyurethane resin composition has a maximum ultraviolet transmittance of ≤3% in the wavelengths between 280 nm and 365 nm and an ultraviolet transmittance of ≤6% in the wavelengths between 365 nm and 370 nm when the thermoplastic polyurethane resin is formed into a film having a thickness of 6 mils and wherein the cumulative weight % of UVA1 and UVA2 in the polyurethane resin composition ranges from 0.5 wt % to 0.85 wt % based on the total weight of the polyurethane resin composition.

11 . The method according to claim 10 , wherein herein the maximum ultraviolet transmittance is measured by the UV-VIS SPECT TEST.

12 . The method according to claim 10 , wherein the ultraviolet absorber package further comprises an oxanilide compound (UVA3).

13 . The method according to claim 12 , wherein the mass ratio of UVA1 to UVA2 to UVA3 is from 1:1:0.2 to 3:1:1.

14 . The thermoplastic polyurethane resin composition according to claim 10 , wherein the film has a maximum ultraviolet transmittance of ≤2% in the wavelengths between 280 nm and 365 nm and a maximum ultraviolet transmittance of ≤4% in the wavelengths between 365 nm and 370 nm.

15 . The method according to claim 10 , further comprising applying the thermoplastic polyurethane resin onto a coated substrate.

16 . The method according to claim 15 , wherein the coated substrate is coated with one or more paint layers.

17 . The method according to claim 16 , wherein the one or more paint layers is a clear coat and the film is applied onto a surface of the clear coat.