Laminated glass and interlayers comprising cellulose esters
US-2020238668-A1 · Jul 30, 2020 · US
Multiple layer interlayer having improved acoustic properties
US12545012B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12545012-B2 |
| Application number | US-202118249564-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 27, 2021 |
| Priority date | Nov 10, 2020 |
| Publication date | Feb 10, 2026 |
| Grant date | Feb 10, 2026 |
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Abstract
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Multilayered interlayers having improved acoustic properties comprising a stiff skin layer(s) and a soft core layer comprising EVA are disclosed. The multilayered interlayers comprise: a first polymer layer (skin layer); a second polymer layer (skin layer); and a third polymer layer (core layer) comprising ethylene vinyl acetate resin between the first polymer layer and the second polymer layer.
First claim
Opening claim text (preview).
What is claimed is: 1 . A multilayer interlayer comprising: a first polymer layer; a second polymer layer; a third polymer layer comprising an ethylene vinyl acetate copolymer having a vinyl acetate content of at least 70 weight percent, wherein the third polymer layer is between and in contact with the first polymer layer and the second polymer layer, and wherein the first polymer layer comprises a poly(vinyl acetal) resin and at least one plasticizer and the second polymer layer comprises poly(vinyl acetal) resin. 2 . The multilayer interlayer of claim 1 , wherein the third polymer layer comprises no added plasticizer. 3 . The multilayer interlayer of claim 1 , wherein the third polymer layer comprises a plasticizer. 4 . The multilayer interlayer of claim 1 , wherein the third polymer layer has a glass transition temperature (Tg) of less than 0° C. 5 . The multilayer interlayer of claim 1 , wherein the third polymer layer comprises an adhesion modifier in an amount of at least 0.1 weight percent. 6 . The multilayer interlayer of claim 1 , wherein the first polymer layer comprises a poly(vinyl butyral) resin and at least one plasticizer. 7 . The multilayer interlayer of claim 1 , wherein the second polymer layer comprises a poly(vinyl butyral) resin and at least one plasticizer. 8 . The multilayer interlayer of claim 1 , wherein the multilayer interlayer has a sound transmission loss (STL) (as measured by ASTM E90 (2009) at 20° C. in a 2.3 mm/2.3 mm glass configuration) of at least about 40 decibels (dB) at 4000 Hertz (Hz) and damping loss factor of at least 0.2 (as measured by ISO16940 at 20° C. in a 2.3 mm/2.3 mm glass configuration). 9 . The multilayer interlayer of claim 1 , wherein the multilayer interlayer has a sound transmission loss (STL) (as measured by ASTM E90 (2009) at 20° C. in a 2.3 mm/2.3 mm glass configuration) of at least about 39 dB at 2000 Hz. 10 . The multilayer interlayer of claim 1 , wherein the multilayer interlayer has a sound transmission loss (STL) (as measured by ASTM E90 (2009) at 20° C. in a 2.3 mm/2.3 mm glass configuration) of at least about 47.5 dB at 6350 Hz. 11 . A multiple layer glazing comprising: a first rigid substrate, the interlayer of claim 1 , and a second rigid substrate.
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Classifications
Insulating · CPC title
containing vinyl acetal · CPC title
comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title
comprising vinyl {(co)polymers; comprising acrylic (co)polymers} · CPC title
using plasticisers · CPC title
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Frequently asked questions
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- What does patent US12545012B2 cover?
- Multilayered interlayers having improved acoustic properties comprising a stiff skin layer(s) and a soft core layer comprising EVA are disclosed. The multilayered interlayers comprise: a first polymer layer (skin layer); a second polymer layer (skin layer); and a third polymer layer (core layer) comprising ethylene vinyl acetate resin between the first polymer layer and the second polymer layer.
- Who is the assignee on this patent?
- Solutia Inc
- What technology area does this patent fall under?
- Primary CPC classification B32B17/10036. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 10 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).