Organic infrared attenuation agents

Patent metadata

Field	Value
Publication number	US-10053549-B2
Application number	US-201213531643-A
Country	US
Kind code	B2
Filing date	Jun 25, 2012
Priority date	Jun 27, 2011
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

Organic infrared attenuation agents have been developed to improve the thermal insulation properties of polymeric foams such as polystyrene low density foams. The organic infrared attenuation agents can include polyols such as sorbitol, maltitol, and poly(ethylene glycol), polysaccharides such as starch or cellulose, and infrared attenuation polyesters such as polybutylene terephthalate. The organic attenuation agents include aromatic compounds or carbon oxygen bonds that are effective in absorbing infrared radiation at the desired wavelengths.

First claim

What is claimed is:

1. An insulating polymer foam formed from a composition comprising:
an alkenyl aromatic polymer material comprising greater than 95 wt. % polystyrene;
a blowing agent comprising hydrofluoroolefins (HFOs);
an organic infrared attenuation agent having a plurality of oxygen-carbon bonds and an oxygen to carbon molar ratio from 1:1 to 1:2, wherein the organic infrared attenuation agent comprises one or more of:
a polyol selected from the group consisting of sorbitol, malitol, and poly(ethylene glycol),
a carbohydrate,
recycled paint, and
coal tar pitch.

2. The insulating polymer foam of claim 1 , wherein the organic infrared attenuation agent has a peak absorption from 700 to 1300 cm −1 .

3. The insulating polymer foam of claim 1 , wherein the carbohydrate is a polysaccharide comprising pea starch or reclaimed cellulose.

4. The insulating polymer foam of claim 1 , wherein the insulating polymer foam has a cell size greater than 150 microns.

5. The insulating polymer foam of claim 1 , wherein the insulating polymer foam comprises from 0.5 to 20 wt % of the organic infrared attenuation agent.

6. A rigid foam insulating board comprising the insulating polymer foam of claim 1 .

7. The rigid foam insulating board of claim 6 , wherein the board has a thickness of ⅛ to 10 inches.

8. The insulating polymer foam of claim 1 , wherein the insulating polymer foam has a cell size from 50 to 500 microns.

9. The insulating polymer foam of claim 1 , wherein the insulating polymer foam comprises a closed cell structure.

10. The insulating polymer foam of claim 1 , wherein the organic infrared attenuation agent has an oxygen to carbon molar ratio from 1:1 to 2:3.

11. The insulating polymer foam of claim 1 , wherein the recycled paint comprises a polyester.

12. The insulating polymer foam of claim 11 , wherein the polyester is polybutylene terephthalate or a polyester prepared from isophthalic acid and neopentyl glycol.

13. The insulating polymer foam of claim 1 , wherein the insulating polymer foam is a thermoplastic foam.

14. The insulating polymer foam of claim 1 , wherein the insulating polymer foam is a rigid foam.

Assignees

• Annan Nikoi
• Delaviz Yadollah
• Han Xiangmin
• Loh Roland
• Owens Corning Intellectual Capital Llc

Inventors

• Annan Nikoi
• Delaviz Yadollah
• Han Xiangmin
• Loh Roland

Classifications

• C08J2325/06

  Polystyrene · CPC title

• C08J2401/02

  Cellulose; Modified cellulose · CPC title

• C08J2201/03

  Extrusion of the foamable blend · CPC title

• C08J2403/02

  Starch; Degradation products thereof, e.g. dextrin · CPC title

• C08L2203/14

  used for foams · CPC title