Methods of making polymer interlayers comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester

1. A method of manufacturing a multiple layer glazing panel interlayer, comprising:

forming a first melt comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester;

forming a second melt comprising polyurethane or poly(ethylene-co-vinyl acetate); and,

coextruding said first melt and said second melt to form said interlayer.

2. The method of claim 1 , wherein said second melt comprises poly(ethylene-co-vinyl acetate).

3. The method of claim 2 , wherein said poly(ethylene-co-vinyl acetate) is extruded at a temperature of 90° C. to 200° C. and said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester is extruded at a temperature of 200° C. to 290° C.

4. The method of claim 2 , wherein said first melt is used to form a single layer and said second melt is used to form a single layer, thereby resulting in said interlayer having two layers.

5. The method of claim 2 , wherein said first melt is used to form a single layer and said second melt is used to form two layers, thereby resulting in said interlayer having a single layer of polymer comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester disposed between two layers of polymer comprising poly(ethylene-co-vinyl acetate).

6. The method of claim 1 , wherein said second melt comprises polyurethane.

7. The method of claim 6 , wherein said polyurethane is extruded at a temperature of 150° C. to 225° C. and said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester is extruded at a temperature of 200° C. to 290° C.

8. The method of claim 6 , wherein said first melt is used to form a single layer and said second melt is used to form a single layer, thereby resulting in said interlayer having two layers.

9. The method of claim 6 , wherein said first melt is used to form a single layer and said second melt is used to form two layers, thereby resulting in said interlayer having a single layer of polymer comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester disposed between two layers of polymer comprising polyurethane.

10. The method of claim 1 , wherein said first polymer melt comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester having at least 10% poly(ethylene terephthalate) component by weight.

11. The method of claim 1 , wherein said first polymer melt comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester having at least 40% poly(ethylene terephthalate) component by weight.

12. A method of manufacturing a multiple layer glazing panel, comprising:

forming a first melt comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester;

forming a second melt comprising polyurethane or poly(ethylene-co-vinyl acetate);

coextruding said first melt and said second melt to form an interlayer; and,

laminating said interlayer with at least one layer of glass to form said glazing panel.

13. The method of claim 12 , wherein said second melt comprises poly(ethylene-co-vinyl acetate).

14. The method of claim 13 , wherein said poly(ethylene-co-vinyl acetate) is extruded at a temperature of 90° C. to 200° C. and said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester is extruded at a temperature of 200° C. to 290° C.

15. The method of claim 13 , wherein said first melt is used to form a single layer and said second melt is used to form a single layer, thereby resulting in said interlayer having two layers.

16. The method of claim 13 , wherein said first melt is used to form a single layer and said second melt is used to form two layers, thereby resulting in said interlayer having a single layer of polymer comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester disposed between two layers of polymer comprising poly(ethylene-co-vinyl acetate).

17. The method of claim 12 , wherein said second melt comprises polyurethane.

18. The method of claim 17 , wherein said polyurethane is extruded at a temperature of 150° C. to 225° C. and said poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester is extruded at a temperature of 200° C. to 290° C.

19. The method of claim 17 , wherein said first melt is used to form a single layer and said second melt is used to form a single layer, thereby resulting in said interlayer having two layers.

20. The method of claim 17 , wherein said first melt is used to form a single layer and said second melt is used to form two layers, thereby resulting in said interlayer having a single layer of polymer comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester disposed between two layers of polymer comprising polyurethane.

21. The method of claim 12 , wherein said first polymer melt comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester having at least 10% poly(ethylene terephthalate) component by weight.

22. The method of claim 12 , wherein said first polymer melt comprises poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester having at least 40% poly(ethylene terephthalate) component by weight.

23. The method of claim 12 , wherein said interlayer is laminated between two layers of glass to form said glazing panel.

24. A multiple layer glazing panel interlayer produced by the process comprising:

forming a first melt comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester;

forming a second melt comprising polyurethane or poly(ethylene-co-vinyl acetate); and,

coextruding said first melt and said second melt to form said interlayer.