Constrained-layer damping material

Patent metadata

Field	Value
Publication number	US-9243402-B2
Application number	US-201113995095-A
Country	US
Kind code	B2
Filing date	Dec 15, 2011
Priority date	Dec 16, 2010
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A constrained-layer damping material including a bitumen material, a binder material, and a tackifier, wherein the bitumen is a soft grade with a penetration of at least 150 dmm and a ring and ball softening point of greater than about 35° C.

First claim

The invention claimed is:

1. A constrained-layer damping material comprising:
a 160/220 pen grade bitumen material;
a tackifier; and
a binder material;
wherein the bitumen material is about 20% to 40% of the total weight of the damping material.

2. The damping material according to claim 1 , wherein the binder material comprises at least one of chalk, powdered limestone, mica, synthetic latex and fibers.

3. The damping material according to claim 1 , wherein the binder is between about 45% and about 70% of the total weight of the damping material.

4. The damping material according to claim 3 , wherein the binder comprises a cohesive binder, the cohesive binder comprises at least one of fibres, polymer, latex, and synthetic rubber, and wherein the cohesive binder is between about 1.5% and about 6% of the total weight of the damping material.

5. The damping material according to claim 1 , wherein the tackifier is selected from the group consisting of magnetic particle fillers and a resin.

6. The damping material according to claim 1 , wherein the tackifier is a rosin derivative.

7. The damping material according to claim 6 , wherein the rosin derivative includes up to about 8% of the total weight of the damping material.

8. The damping material according to claim 6 , wherein
the rosin derivate is selected from the group consisting of methyl ester of rosin, methyl ester of hydrogenated rosin, triethylene glycol ester of rosin, and triethylene ester of hydrogenated rosin.

9. The damping material according to claim 1 , wherein the damping material exhibits a peak loss factor in the range of 30° C. to 50° C.

10. A constrained layer damping product, for use in a constrained layer damping system, the constrained layer damping product comprising: a constraining layer; and
a constrained layer,
wherein the constrained layer includes a constrained-layer damping material which comprises a 160/220 pen grade bitumen material, a binder material, and a tackifier, wherein the bitumen material is about 20% to 40% of the total weight of the damping material.

11. The constrained layer damping product according to claim 10 , further including at least one additional adhesive layer.

12. The constrained layer damping product according to claim 10 , wherein the tackifier is a rosin derivative, and the weight percentage of the rosin derivate is between about 4% and about 8% of the total weight of the damping material.

13. The constrained layer damping product according to claim 10 , wherein the damping materials exhibits a peak loss factor in the range of 30° C. to 50° C.

Assignees

• Stopin Gilles
• Tesse Celine
• Autoneum Man Ag

Inventors

• Stopin Gilles
• Tesse Celine

Classifications

• C08L95/00 Primary

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• B32B11/02

  with fibres or particles {being present as additives in the layer} · CPC title

• B32B2260/00

  Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material · CPC title

• B32B11/04

  comprising such {bituminous or tarry} substance as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a glass layer B32B17/06)} · CPC title

• C08L93/04

  Rosin · CPC title