Polymer interlayers with improved acoustic properties
AssigneeSolutia Inc.
InventorsYINONG MA, GUANGXIN TANG, WENJIE CHEN
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Abstract
A polymer interlayer with improved acoustic properties. The polymer interlayer comprises a first polymer layer, a second polymer layer, and a third polymer layer. The first polymer layer is positioned between the second polymer layer and the third polymer layer. The first polymer layer is formed from a resin comprising polyvinyl acetate (PVAc). The first polymer layer has a Tg of less than about 20° C. and a peak tan δ greater than about 2.0.
Claims20
A polymer interlayer with improved acoustic properties, the polymer interlayer comprising:
- a first polymer layer;
- a second polymer layer;
- and
- a third polymer layer,
- wherein said first polymer layer is positioned between said second polymer layer and said third polymer layer,
- wherein said first polymer layer is formed from a resin comprising polyvinyl acetate (PVAc), wherein said first polymer layer has a Tg of less than about 20° C. and a peak tan δ greater than about 1.5.
A method of forming a polymer interlayer with improved acoustic properties, said method comprising the steps of:
- (a) extruding a first polymer melt to form a first polymer layer;
- and
- (b) extruding a second polymer melt to form a second polymer layer and a third polymer layer;
- wherein upon said extruding of steps (a) and (b), the first polymer layer is positioned between the second and third polymer layers,
- wherein the first polymer melt comprises a resin including polyvinyl acetate (PVAc), and wherein the first polymer layer has a Tg of less than about 20° C. and a peak tan δ greater than about 2.0.
Dependencies are inferred from the claim text.