Polymer interlayers comprising poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester

• US 20070003746A1
• Filed: 06/30/2005
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Abandoned Application

• Current Assignee: Solutia Incorporated (Eastman Chemical Company)
• Original Assignee: Solutia Incorporated (Eastman Chemical Company)
• Inventors: Karagiannis, Aristotelis, Szydlowski, Witold, Chen, Wenjie
• Application Number:
  US11/170,643
• Publication Number:
  US 20070003746A1
• Time in Patent Office: Days
• US Class Current: 428/220
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2307/536 Hardness
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/702 Amorphous
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31616 Next to polyester [e.g., alkyd]
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers

Abstract

The present invention is in the field of polymer interlayers used in multiple layer glass panels having one or more glass layers, and specifically the present invention is in the field of polymer interlayers comprising a layer of poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester (PETG).

Claims

1. A laminated glass interlayer, comprising:

a first polymer sheet comprising amorphous poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester, wherein said first polymer sheet has a thickness of at least 0.25 millimeters.

3. The interlayer of claim 1, wherein said interlayer further comprises a second polymer sheet disposed in contact with said first polymer sheet, wherein said second polymer sheet comprises a polymer selected from the group consisting of poly(vinyl butyral), poly(ethylene-co-vinyl acetate), poly(ethylene-co-ethyl acrylate), polyurethane, partially neutralized ethylene/(meth)acrylic acid copolymers, polyethylene, polyethylene copolymers, and poly(vinyl chloride).

4. The interlayer of claim 3, wherein said second polymer sheet comprises polyurethane or poly(ethylene-co-vinyl acetate).

5. The interlayer of claim 3, wherein said interlayer has a thickness of at least 0.26 millimeters.

6. The interlayer of claim 1, wherein said interlayer further comprises a third polymer sheet disposed in contact with said first polymer sheet, wherein said third polymer sheet comprises a polymer selected from the group consisting of poly(vinyl butyral), poly(ethylene-co-vinyl acetate), poly(ethylene-co-ethyl acrylate), polyurethane, partially neutralized ethylene/(meth)acrylic acid copolymers, polyethylene, polyethylene copolymers, and poly(vinyl chloride).

7. The interlayer of claim 6, wherein said third polymer sheet comprises polyurethane, or poly(ethylene-co-vinyl acetate).

8. The interlayer of claim 6, wherein said interlayer has a thickness of at least 0.27.

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

2. (canceled)

10. A laminated glass interlayer, consisting essentially of a polymer sheet comprising amorphous poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester.

11. The interlayer of claim 10, wherein said polymer sheet has a thickness of at least 0.25 millimeters.

12. The interlayer of claim 10, wherein said polymer sheet has a thickness of at least 0.3 millimeters.

13. The interlayer of claim 10, wherein said polymer sheet comprises adhesion promoters.

14. The interlayer of claim 13, wherein said adhesion promoter is a member selected from the group consisting of γ

-glycidoxypropyltrimethoxysilane, γ

-aminopropyltriethoxysilane, β

-cyclohexylethyltrimethoxysilane, N-β

-aminoethylaminomethylphenylethyltrimethoxysilane, N-β

-aminoethyl-γ

-aminopropyltrimethoxysilane, bis(β

-hydroxyethyl)-γ

-aminopropyltriethoxysilane, acrylic adhesives, cyanoacrylates cement, polyurethanes adhesives, and polyester adhesives.

15. A multiple layer glass panel, comprising an interlayer consisting essentially of a polymer sheet comprising amorphous poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester.

16. The panel of claim 15, wherein said polymer sheet further comprises adhesion promoters.

18. The panel of claim 15, wherein said interlayer has a thickness of at least 0.2 millimeters.

19. The panel of claim 15, wherein said panel comprises one pane of glass.

20. The panel of claim 15, wherein said panel comprises two panes of glass.

17. (canceled)

21. A multiple layer glass panel, comprising an interlayer comprising:

a first polymer sheet comprising amorphous poly(cyclohexanedimethylene terephthalate-co-ethylene terephthalate) copolyester, wherein said first polymer sheet has a thickness of at least 0.25 millimeters.