Acoustic damping compositions having elastomeric particulate

Patent metadata

Field	Value
Publication number	US-9637913-B2
Application number	US-75774310-A
Country	US
Kind code	B2
Filing date	Apr 9, 2010
Priority date	Apr 10, 2009
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

An acoustic damping composition includes a urethane component, elastomeric particles, and a binder resin including an addition polymer having a carboxylic functional group. The acoustic damping composition can have a Mode 1 Damping Parameter of at least 0.45. The binder resin can have a glass transition temperature of not greater than −25° C.

First claim

What is claimed is:

1. An acoustic damping composition comprising:
a water-based emulsion comprising:
a binder resin including an addition polymer having a carboxylic functional group;
a modifying resin immiscible with the binder resin, the modifying resin comprising a urethane component; and
a first set of elastomeric particles that decrease the deformability of the acoustic damping composition relative to a same acoustic damping composition absent the first set of elastomeric particles,
wherein, when the acoustic damping composition is deployed and dried, the acoustic damping composition has a Mode 1 Damping Parameter of at least 0.45.

2. The acoustic damping composition of claim 1 , wherein the binder resin has a glass transition temperature not greater than −40° C.

3. The acoustic damping composition of claim 1 , wherein the first set of elastomeric particles have a modulus of elasticity of not greater than 20 MPa.

4. The acoustic damping composition of claim 1 , comprising 0.1 wt % to 50 wt % of the first set of elastomeric particles.

5. The acoustic damping composition of claim 1 , wherein the average particle size of the first set of elastomeric particles is not greater than 850 micrometers.

6. The acoustic damping composition of claim 5 , further comprising a second set of elastomeric particles, wherein an average particle size of the second set of elastomeric particles is greater than an average particle size of the first set of elastomeric particles.

7. The acoustic damping composition of claim 6 , wherein the second set of elastomeric particles has a different composition than the first set of elastomeric particles.

8. The acoustic damping composition of claim 1 , wherein the first set of elastomeric particles includes a polyolefin rubber.

9. The acoustic damping composition of claim 1 , wherein the first set of elastomeric particles includes a diene elastomer.

10. The acoustic damping composition of claim 1 , wherein the first set of elastomeric particles include a silicone rubber.

11. The acoustic damping composition of claim 1 , wherein, when deployed and dried, the acoustic damping composition has a Mode 2 Damping Parameter of at least 0.27.

12. The acoustic damping composition of claim 1 , wherein, when deployed and dried, the acoustic damping composition has a Mode 3 Damping Parameter of at least 0.27.

13. The acoustic damping composition of claim 1 , wherein, when the acoustic damping composition is deployed and dried, the binder resin, the modifying resin, and the first elastomeric particles each form a different phase.

14. The acoustic damping composition of claim 1 , wherein the average particle size of the first elastomeric particles is not greater than 450 micrometers.

15. The acoustic damping composition of claim 1 , wherein the water-based emulsion has a solids content of at least 40%.

16. The acoustic damping composition of claim 1 , wherein the water-based emulsion has a solids content greater than 60%.

17. The acoustic damping composition of claim 1 , wherein, when the acoustic damping composition is deployed and dried, the acoustic damping composition has a Mode 1 Damping Parameter of at least 0.5, a Mode 2 Damping Parameter of at least 0.3, and a Mode 3 Damping Parameter of at least 0.27.

18. A construction panel comprising:
first and second panels; and
an acoustic damping composition disposed between the first and second panels, the acoustic damping composition comprising:
a binder resin including an addition polymer having a carboxylic functional group,
a modifying resin comprising a urethane component, and
a first set of elastomeric particles,
wherein the first set elastomeric particles form a separate phase from the rest of the acoustic damping composition; decrease the deformability of the acoustic damping composition relative to a same acoustic damping composition absent the first set of elastomeric particles; and lodge between the first and second panels at pinch points, and
wherein the acoustic damping composition has a Mode 1 Damping Parameter of at least 0.45.

19. The construction panel of claim 18 , wherein the first set of elastomeric particles have a modulus of elasticity of not greater than 20 MPa.

20. An acoustic damping composition layer comprising:
an acoustic damping composition dried as a film comprising:
a binder resin forming a first phase, the binder resin including an addition polymer having a carboxylic functional group; and
a modifying resin forming a second phase separate from the first phase, the modifying resin including a urethane component; and
a first set of elastomeric particles forming a third phase separate from the first and second phases,
wherein the first set of elastomeric particles decrease the deformability of the acoustic damping composition layer relative to a same acoustic damping composition layer absent the first set of elastomeric particles, and
wherein, when the acoustic damping composition is dried as a film, the acoustic damping composition layer has a haze value as measured by ASTM D1003 (method B) of at least 30%.

Assignees

• Ravnaas Brian
• Saint Gobain Performance Plastics Corp

Inventors

• Ravnaas Brian

Classifications

• E04B1/84

  Sound-absorbing elements · CPC title

• E04B2001/8466

  with an intermediate layer formed of lines or dots of elastic material · CPC title

• Y10T428/31855

  Of addition polymer from unsaturated monomers · CPC title

• E04B2001/8461

  layered · CPC title

• E04B2001/8476

  with acoustical cavities, with or without acoustical filling · CPC title