Glass laminates for reduction of sound transmission

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 a polyvinyl butyral layer and the polymer layer 2 is an ionoplast resin (ionomer) layer.

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

3. The laminate of claim 2 further comprising a glass layer on the outside of the polyvinyl butyral layer or the ionoplast resin (ionomer) layer.

4. The laminate of claim 1 wherein the polyester layer is coated on both surfaces with a polyallylamine-based primer and is in contract with the polyvinyl butyral layer and the ionoplast resin (ionomer) layer.

5. The laminate of claim 4 further comprising a glass layer on the outside of the polyvinyl butyral layer and a second glass layer on the outside of the ionoplast resin (ionomer) layer.

6. The laminate of claim 1 wherein the laminate has an adhesive strength of at least about 10 lb/in 2 .

7. The laminate of claim 6 wherein the laminate has not been flame treated.

8. The laminate of claim 7 wherein the polyester layer contains a surface coated with a polyallylamine-based primer in contract with either the polymer layer 1 or the polymer layer 2 .

9. The sound-damping laminate of claim 8 wherein the laminate further comprise a glass layer adhered to the outside of the polyvinyl butyral layer and a second glass layer adhered to the outside of the ionoplast resin (ionomer) layer, and 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.

10. The laminate of claim 9 further comprising a glass layer on the outside of the polyvinyl butyral layer and a second glass layer on the outside of the ionoplast resin (ionomer) layer, and wherein the polyester layer contains a surface coated with a polyallylamine-based primer in contract with the ionoplast resin (ionomer) layer.

11. The laminate of claim 9 wherein the loss factor is at least about 0.15 throughout the range of from 50 to 10000 Hz.

12. An article comprising the laminate of claim 1 .

13. The article of claim 12 wherein the article is an automobile.

14. The article of claim 13 wherein the laminate is a windshield, a side-lite, a moon-roof, or a sun-roof.

15. The article of claim 12 wherein the article is a building.

16. The article of claim 15 wherein the laminate is a window, door, floor, ceiling, stairs, wall, partition, or other structural building component.

17. The laminate of claim 1 further comprising a glass layer adhered to at least one of the outside of the polyvinyl butyral layer and the ionoplast resin (ionomer) layer.

18. The laminate of claim 1 further comprising a glass layer on the outside of the polyvinyl butyral layer and a second glass layer on the outside of the ionoplast resin (ionomer) layer.

19. The laminate of claim 1 wherein the polyvinyl butyral layer is a sound-damping polyvinyl butyral layer having a plasticizer content of from about 40 pph to about 50 pph per parts polyvinyl butyral.

20. The laminate of claim 19 wherein the polymer layer 2 is an ionoplast resin (ionomer) layer, and wherein the polyester layer contains a surface coated with a polyallylamine-based primer in contract with the ionoplast resin (ionomer) layer.

21. The laminate of claim 20 wherein the sound-damping polyvinyl butyral layer having a plasticizer content of from about 44 pph to about 47 pph per parts polyvinyl butyral.

22. The laminate of claim 20 wherein the plasticizer is selected from the group consisting of triethylene glycol di(2-ethylhexanoate), tetraethylene glycol di-heptanoate, triethyleneglycol di(2-ethylbutyrate), and di-hexyl adipate.

23. The laminate of claim 20 further comprising a glass layer on the outside of the polyvinyl butyral layer and a second glass layer on the outside of the ionoplast resin (ionomer) layer.

24. The laminate of claim 23 wherein the polyvinyl butyral layer has a plasticizer content of from about 44 pph to about 47 pph per parts polyvinyl butyral, and wherein the plasticizer is selected from the group consisting of triethylene glycol di(2-ethylhexanoate), tetraethylene glycol di-heptanoate, triethyleneglycol di(2-ethylbutyrate), and di-hexyl adipate.

25. The laminate of claim 19 wherein the sound-damping polyvinyl butyral layer having a plasticizer content of from about 42 pph to about 49 pph per parts polyvinyl butyral.

26. The laminate of claim 19 wherein the sound-damping polyvinyl butyral layer having a plasticizer content of from about 44 pph to about 47 pph per parts polyvinyl butyral.

27. The laminate of claim 19 wherein the plasticizer for the sound-damping polyvinyl butyral layer is selected from the group consisting of diesters of polyethylene glycol.

28. The laminate of claim 19 wherein the plasticizer for the sound-damping polyvinyl butyral layer is selected from the group consisting of triethylene glycol di(2-ethylhexanoate), tetraethylene glycol di-heptanoate, triethyleneglycol di(2-ethylbutyrate), and di-hexyl adipate.

29. The laminate of claim 19 wherein the plasticizer for the sound-damping polyvinyl butyral layer is tetraethylene glycol di-heptanoate.

30. The laminate of claim 19 further comprising a glass layer adhered to the outside of the sound-damping polyvinyl butyral layer.