Composites for reducing noise

Patent metadata

Field	Value
Publication number	US-12466941-B2
Application number	US-201917047140-A
Country	US
Kind code	B2
Filing date	Apr 11, 2019
Priority date	Apr 13, 2018
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The present invention is directed to the use of a thermoplastic polymer-wollastonite composite and/or a thermoplastic elastomer-wollastonite composite for reducing noise. The present invention is also directed to an article comprising a thermoplastic polymer-wollastonite composite and/or a thermoplastic elastomer-wollastonite composite, a method of making an article according to the invention, and a device comprising an article according to the invention.

First claim

The invention claimed is:

1 . A noise-reducing composition comprising a thermoplastic elastomer-wollastonite composite, wherein
the thermoplastic elastomer is selected from thermoplastic polyurethane, thermoplastic vulcanizates, thermoplastic polyamides, thermoplastic styrenics, thermoplastic copolyester and combinations thereof; and the thermoplastic elastomer-wollastonite composite comprises wollastonite in an amount of from about 30 to about 45 weight percent based on the total weight of the thermoplastic elastomer-wollastonite composite and having a BET surface area in the range of from about 0.2 to about 3.0 m 2 /g.

2 . A composition according to claim 1 , wherein the wollastonite has a median particle size d 50 in the range of from about 1 μm to about 90 μm.

3 . A composition according to claim 1 , wherein the wollastonite has a BET surface area in the range of from about 0.4 to about 2.7 m 2 /g.

4 . A composition according to claim 1 , wherein the thermoplastic elastomer is present in an amount of from about 40 to about 70 weight percent based on the total weight of the composite.

5 . A composition according to claim 1 , wherein the composite further comprises one or more component selected from a plasticizer, a stabilizer, an impact modifier, a filler/extender, a flame retardant, a tackifier, a thickener/rheology modifier, an antioxidant, a compatibilizer, an accelerator agent or combinations thereof.

6 . An article comprising a composition according to claim 1 .

7 . An article according to claim 6 , wherein the article is a panel.

8 . A method of manufacturing the article according to claim 6 by extrusion, injection molding and/or thermoforming.

9 . A method of reducing noise comprising installing an article comprising the composition of claim 1 within a device.

10 . A device comprising an article according to claim 6 .

11 . The device according to claim 10 , wherein the device is an air conditioning unit, a washing machine, a tumble dryer, a washing machine/tumble dryer, a refrigerator, a freezer, a dishwasher, a grinder, a vacuum cleaner, a hairdryer, a pump, a compressor, a generator or a lawn mower.

12 . The method of claim 9 , wherein the device is an air conditioning unit, a washing machine, a tumble dryer, a washing machine/tumble dryer, a refrigerator, a freezer, a dishwasher, a grinder, a vacuum cleaner, a hairdryer, a pump, a compressor, a generator or a lawn mower.

13 . A method according to claim 12 , wherein the article is a panel.

14 . A composition according to claim 2 , wherein the wollastonite has a BET surface area in the range of from about 1.6 to about 3.0 m 2 /g.

15 . A composition according to claim 1 , wherein the wollastonite has an aspect ratio in the range of at least 2:1.

16 . A composition according to claim 14 , wherein the wollastonite has an aspect ratio in the range of at least 2:1.

17 . A composition according to claim 1 , wherein the wollastonite has a median particle size d 50 in the range of from about 3 μm to about 85 μm.

18 . A composition according to claim 1 , wherein the thermoplastic elastomer-wollastonite composite comprises wollastonite in an amount of from about 30 to about 40 weight percent based on the total weight of the thermoplastic elastomer-wollastonite composite.

19 . A composition according to claim 1 , wherein the thermoplastic elastomer is present in an amount of from about 45 to about 70 weight percent based on the total weight of the composite.

Assignees

• Imerys Usa Inc

Inventors

• Raut Prasad
• Bolourchi Maziyar

Classifications

• C08L2207/04

  Thermoplastic elastomer · CPC title

• C08K2201/006

  Additives being defined by their surface area · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• C08K3/36

  Silica · CPC title

• C08F10/06

  Propene · CPC title