Glass laminates for reduction of sound transmission

• US 20070298264A1
• Filed: 07/26/2007
• Published: 12/27/2007
• Est. Priority Date: 09/20/2004
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Anderson, Jerrel
• Granted Patent: US 7,754,338 B2
• Time in Patent Office: Days
• US Class Current: 428/423.7
• CPC Class Codes: B29C 55/023 using multilayered plates or sheets
• 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 17/1055 characterized by the resin layer, i.e. interlayer
• CPC Class Codes: B32B 17/10743 containing acrylate (co)polymers or salts thereof
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/24 Organic non-macromolecular coating
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2419/00 Buildings or parts thereof
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 2605/08 Cars
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/22 using plasticisers
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: G10K 11/168 Plural layers of different materials, e.g. sandwiches
• CPC Class Codes: Y10T 428/2852 : Adhesive compositions
• CPC Class Codes: Y10T 428/31507 : Of polycarbonate
• CPC Class Codes: Y10T 428/31551 : Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31565 : Next to polyester [polyethylene terephthalate, etc.]
• CPC Class Codes: Y10T 428/31616 : Next to polyester [e.g., alkyd]
• CPC Class Codes: Y10T 428/31645 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31649 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31736 : Next to polyester
• 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
• CPC Class Codes: Y10T 428/31855 : Of addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31935 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon

Abstract

The present invention is a glass laminate having sound attenuation properties that make it suitable for use as acoustic glazing in architectural applications and/or in vehicles.

Claims

1. A sound-damping laminate comprising a polyester polymer layer positioned between polymer layer 1 and polymer layer 2, wherein the polymer layer 1 is an ionoplast resin (ionomer) layer and the polymer layer 2 is a layer selected from the group consisting of polyurethanes layer;

ethylene vinyl acetate copolymer layer; and

ethylene acid copolymer layer.

2. The laminate of claim 1 wherein the polymer layer 2 is a polyurethanes layer.

3. The laminate of claim 1 wherein the polymer layer 2 is an ethylene vinyl acetate copolymer layer.

4. The laminate of claim 1 wherein the polymer layer 2 is an ethylene acid copolymer layer.

5. The laminate of claim 1 further comprising a glass layer adhered to at least one of the outside of the polymer layer 1 and the polymer layer 2.

6. The laminate of claim 1 further comprising a glass layer on the outside of the polymer layer 1 and a second glass layer on the outside of the polymer layer 2.

7. The laminate of claim 1 wherein the polyester layer contains a surface coated with a polyallylamine-based primer in contact with at least one of the polymer layer 1 or polymer layer 2.

8. The laminate of claim 1 wherein the polyester layer contains a surface coated with a polyallylamine-based primer in contact with the ionoplast resin (ionomer) layer.

9. The laminate of claim 1 wherein the polyester layer is coated on both surfaces with a polyallylamine-based primer and is in contact with the polymer layer 1 and the polymer layer 2.

10. The laminate of claim 1 wherein the laminate has an adhesive strength of at least about 10 lb/in².

11. The laminate of claim 9 wherein the laminate has an adhesive strength of at least about 10 lb/in².

12. The laminate of claim 7 wherein the laminate has not been flame treated.

13. The laminate of claim 7 further comprising a glass layer adhered to at least one of the outside of the polymer layer 1 and the polymer layer 2.

14. The laminate of claim 7 wherein the laminate has a loss factor of at least about 0.080 measured at 20°

C. in the range of 50 to 10,000 Hz.

15. The laminate of claim 14 wherein the loss factor is at least about 0.15 throughout the range of from 50 to 10000 Hz.

16. An article comprising the laminate of claim 1.

17. The article of claim 16 wherein the article is an automobile.

18. The article of claim 17 wherein the laminate is a windshield, a side-lite, a moon-roof, or a sun-roof.

19. The article of claim 16 wherein the article is a building.

20. The article of claim 19 wherein the laminate is a window, door, floor, ceiling, stairs, wall, partition, or other structural building component.

21. The article of claim 16 wherein the laminate further comprises a glass layer adhered to at least one of the outside of the polymer layer 1 and the polymer layer 2.

22. The article of claim 21 wherein the laminate has an adhesive strength of at least about 10 lb/in² and a loss factor of at least about 0.080 measured at 20°

C. in the range of 50 to 10,000 Hz.