Authenticatable articles and methods therefor
View Patent ↗An article comprising the compound of Formula (I): wherein R 1 is selected from the group consisting of an aliphatic functionality having 1 to 12 carbons, an aromatic functionality having 3 to 20 carbons, and a cycloaliphatic functionality having 3 to 20 carbons; R 2 and R 3 are independently selected from the group consisting of a hydroxyl group, a halogen atom, an aliphatic functionality having 1 to 12 carbons, an aromatic functionality having 3 to 20 carbons, and a cycloaliphatic functionality having 3 to 20 carbons; Y is either an oxygen atom or a sulfur atom; “n” has a value of 0 to 4; and “m” has a value of 0 to 3.
1. An article comprising:
a polycarbonate polymer; and
a first compound of Formula (I): incorporated in the polycarbonate polymer
wherein R 1 is selected from the group consisting of an aliphatic functionality having 1 to 12 carbons, an aromatic functionality having 3 to 20 carbons, and a cycloaliphatic functionality having 3 to 20 carbons; R 2 and R 3 are independently selected from the group consisting of a hydroxyl group, a halogen atom, an aliphatic functionality having 1 to 12 carbons, an aromatic functionality having 3 to 20 carbons, and a cycloaliphatic functionality having 3 to 20 carbons; Y is either an oxygen atom or a sulfur atom; “n” has a value of 0 to 4; and “m” has a value of 0 to 3.
2. The article of claim 1 , wherein the article comprises from about 1×10 −7 percent by weight to about 10 percent by weight of the first compound of Formula (I), based on the weight of the polycarbonate polymer.
3. The article of claim 1 , wherein the first compound of Formula (I) has a Stokes shift of greater than about 50 nanometers.
4. The article of claim 1 , wherein the first compound of Formula (I) is a compound selected from the group consisting of Formula (II), Formula (IV), Formula (V), Formula (VI), Formula (VIII), and Formula (IX):
5. The article of claim 4 , wherein the first compound is of Formula (II):
6. The article of claim 4 , wherein the first compound is of Formula (VI):
7. The article of claim 1 , wherein the article is an optical disc.
8. The article of claim 1 , further comprising a second compound of Formula (I) which is different from the first compound.
9. The article of claim 1 , wherein the first compound of Formula (I) has a T d of greater than 290° C.
10. The article of claim 1 , wherein the first compound of Formula (I) has a T d of from 295° C. to 350° C.
11. An article made by:
incorporating an authentication compound of Formula (I) in a polycarbonate polymer to provide an authenticatable polymer;
wherein R 1 is selected from the group consisting of an aliphatic functionality having 1 to 12 carbons, an aromatic functionality having 3 to 20 carbons, and a cycloaliphatic functionality having 3 to 20 carbons; R 2 and R 3 are independently selected from the group consisting of a hydroxyl group, a halogen atom, an aliphatic functionality having 1 to 12 carbons, an aromatic functionality having 3 to 20 carbons, and a cycloaliphatic functionality having 3 to 20 carbons; Y is either an oxygen atom or a sulfur atom; “n” has a value of 0 to 4; and “m” has a value of 0 to 3; and
forming an article from the authenticatable polymer;
wherein the authentication compound of Formula (I) is present in an amount of about 1×10 −7 percent by weight to about 10 percent by weight based on the weight of the polycarbonate polymer.
12. The article of claim 11 , wherein the article is an optical disc.
13. An article comprising:
a polycarbonate polymer; and
a compound of Formula (III), Formula (VII), or Formula (X): incorporated in the polycarbonate polymer