Polymer films comprising stabilized infrared absorbing agents
View Patent ↗The present invention includes polymer films that comprise lanthanum hexaboride and an epoxy agent. The lanthanum hexaboride and epoxy agent can be incorporated into or onto a polymer film in any suitable manner. The addition of an epoxy agent surprisingly provides a stabilization effect to the lanthanum hexaboride, which allows for the production of polymer films that advantageously absorb infrared radiation and resist environmental degradation. Polymer films thus produced have a significant number of applications, for example, but not limited to, display devices, protective coverings, and glazing film applications.
1. A poly(ethylene terephthalate) film, comprising:
lanthanum hexaboride; and
an epoxy agent;
wherein said poly(ethylene terephthalate) film has a thickness of 0.01 millimeters to 0.30 millimeters; wherein said lanthanum hexaboride and said epoxy agent are disposed in said poly(ethylene terephthalate) film; and wherein said epoxy agent is selected from the group consisting of diepoxides of poly(oxypropylene) glycol, 2-ethylhexyl glycidyl ether, and diepoxide products of epichlorohydrin and polypropylene glycol.
2. The polymer film of claim 1 , wherein said epoxy agent is Present in an amount of 0.05 to 10.0 weight percent of said film.
3. The polymer film of claim 1 , wherein said epoxy agent is present in an amount of 0.5 to 4.0 weight percent of said film.
4. The polymer film of claim 1 , wherein said lanthanum hexaboride is present in an amount of 0.01 to 0.2 weight percent of said film.
5. The polymer film of claim 1 , wherein said lanthanum hexaboride is present in an amount of 0.01 to 0.15 weight percent of said film.