Plastic compositions and products produced therefrom
View Patent ↗In one embodiment, a plastic composition can comprise: a plastic, a white pigment, and a non-white colorant. The composition can have a whiteness index of greater than or equal to about 50, and a composition yellowness index of less than 10, as measured on a 3 mm thick color chip under D65 illuminant and 2 degree observer. Also disclosed are articles made from the plastic composition.
1. A plastic composition, comprising:
a virgin plastic, wherein the virgin plastic has a plastic yellowness index of greater than or equal to 55;
a white pigment; and
a non-white colorant;
wherein the composition has a whiteness index of greater than or equal to about 50, a composition yellowness index of less than 10, and a brightness of greater than or equal to 50, as measured on a 3 mm thick color chip under D65 illuminant and 2 degree observer.
2. The composition of claim 1 , wherein the whiteness index is greater than or equal to about 60 and the brightness is greater than or equal to 60.
3. The composition of claim 2 , wherein the whiteness index is greater than or equal to about 70 and the brightness is greater than or equal to 70.
4. The composition of claim 1 , wherein a 3 mm color chip comprising the virgin plastic and the non-white colorant exhibits a reflectance of greater than or equal to about 15% at a wavelength of about 380 nm to about 580 nm.
5. The composition of claim 4 , wherein the reflectance is greater than or equal to about 25%.
6. The composition of claim 5 , wherein the reflectance is greater than or equal to about 35%.
7. The composition of claim 1 , wherein the plastic yellowness index is measured after thermal aging.
8. The composition of claim 1 , wherein the white pigment is present in the amount of 18 pph to about 45 pph by weight, based on 100 parts of the plastic.
9. The plastic composition of claim 1 , comprising the reaction product of the virgin plastic, the white pigment, and the non-white colorant.
10. The composition of claim 1 , wherein the non-white colorant is selected from the group consisting of Solvent Violet 13, Solvent Violet 36, Pigment Brown 24, Pigment Blue 15:4, Pigment Blue 29, and combinations comprising at least one of the foregoing.
11. An article formed from the composition of claim 1 .
12. The article of claim 11 , wherein an article has a whiteness index of greater than or equal to about 50, a composition yellowness index of less than 10, and a brightness of greater than or equal to 50, as measured on a 3 mm thick color chip under D65 illuminant and 2 degree observer.
13. The article of claim 11 , wherein the article is a film having a thickness of about 20 micrometers to about 200 micrometers, wherein at a white pigment loading of 20 pph loading, the total light transmission through the film is less than 20%, and wherein the film has a side with an adhesive disposed thereon.
14. A plastic composition, comprising:
a virgin plastic, wherein the virgin plastic has a plastic yellowness index of greater than 11;
a white pigment; and
a non-white colorant;
wherein the composition has a whiteness index of greater than or equal to about 50, a composition yellowness index of less than 10, and a brightness of greater than or equal to 50, as measured on a 3 mm thick color chip under D65 illuminant and 2 degree observer, wherein the plastic comprises a material selected from the group consisting of polycarbonate, polyarylene ether, polyphenylenes, polysulfones, polyacrylates, polyketones, a combination comprising at least one of the foregoing plastics, and a reaction product formed from a reaction with at least one of the foregoing plastics.
15. The composition of claim 14 , wherein the plastic yellowness index is greater than or equal to about 15.
16. The composition of claim 15 , wherein the plastic yellowness index is greater than or equal to about 20.
17. The composition of claim 16 , wherein the plastic yellowness index is greater than or equal to about 40.
18. A polyimide composition, comprising:
a polyimide;
a white pigment; and
a non-white colorant;
wherein the composition has a whiteness index of greater than or equal to about 60, a composition yellowness index of less than or equal to about 15, and a brightness of greater than or equal to 60, as measured on a 3 mm thick color chip under D65 illuminant and 2 degree observer.
19. The composition of claim 18 , wherein the whiteness index is greater than or equal to about 65, a composition yellowness index of less than or equal to about 10, and the brightness is greater than or equal to 65.
20. The composition of claim 19 , wherein the whiteness index is greater than or equal to about 70 and the brightness is greater than or equal to 70.
21. The composition of claim 18 , wherein a 3 mm color chip comprising the polyimide and the non-white colorant exhibits a reflectance of greater than or equal to about 15% at a wavelength of about 380 nm to about 580 nm.
22. The composition of claim 18 , wherein the polyimide comprises a material selected from the group consisting of polyetherimide, a combination comprising a plastic and polyetherimide, and reaction products formed from a reaction with polyetherimide.
23. The composition of claim 18 , wherein the white pigment comprises titanium dioxide, and wherein the non-white colorant is present in an amount of about 0.0001 to about 1.0 pph by weight based upon 100 parts of the polyimide.
24. The composition of claim 18 , wherein the non-white colorant is selected from the group consisting of Solvent Violet 13, Solvent Violet 36, Pigment Brown 24, Pigment Blue 15:4, Pigment Blue 29, and combinations comprising at least one of the foregoing.
25. The composition of claim 18 , wherein the polyimide has a polyimide yellowness index is greater than or equal to about 40.
26. The composition of claim 25 , wherein the polyimide yellowness index is greater than or equal to 55.
27. An article formed from the composition of claim 18 .