Azeotrope-like compositions of tetrafluoropropene and alcohols

Patent metadata

Field	Value
Publication number	US-9120906-B2
Application number	US-201414340828-A
Country	US
Kind code	B2
Filing date	Jul 25, 2014
Priority date	Apr 16, 2007
Publication date	Sep 1, 2015
Grant date	Sep 1, 2015

Abstract

A composition including an effective amount of trans-1,3,3,3-tetrafluoropropene component combined with an effective amount of an alcohol selected from the group of methanol, ethanol, propanol, isopropanol, tert-butanol, isobutanol, 2-ethyl hexanol and any combination thereof, where the composition has azeotropic properties.

First claim

What is claimed is:

1. A blowing agent comprising an azeotrope-like composition consisting essentially of trans-1,3,3,3-tetrafluoropropene and ethanol, wherein said trans-1,3,3,3-tetrafluoropropene and ethanol are present in an amount effective to form an azeotrope-like composition, and wherein said azeotrope-like composition has a boiling point of from about −20° C. to about −19° C. at a pressure of about 14.3 psia.

2. The blowing agent of claim 1 , wherein said trans-1,3,3,3-tetrafluoropropene is present in said azeotrope-like composition in amounts of from about 83 to about 98 weight percent of said azeotrope-like composition.

3. The blowing agent of claim 2 , wherein said trans-1,3,3,3-tetrafluoropropene is present in said azeotrope-like composition in amounts of from about 83.4 weight percent to about 98.8 weight percent of said composition.

4. The blowing agent of claim 1 , wherein said ethanol is present in said azeotrope-like composition in amounts of from about 1 to about 16 weight percent of said azeotrope-like composition.

5. The blowing agent of claim 4 , wherein said ethanol is present in said azeotrope-like composition in amounts of from about 1.2 to about 16.6 weight percent of said azeotrope-like compositions.

6. A method of forming a foamable composition comprising the steps of:
(i) providing at least one thermoplastic foam forming component;
(ii) providing a blowing agent composition comprising an azeotrope-like compoposition consisting essentially of trans-1,3,3,3-tetrafluoropropene and ethanol, wherein said trans-1,3,3,3-tetrafluoropropene and ethanol are present in an amount effective to form an azeotrope-like composition, and wherein said azeotrope-like composition has a boiling point of from about −20° C. to about −19° C. at a pressure of about 14.3 psia; and
(iii) forming a foamable composition by combining said thermoplastic foam forming component and said blowing agent composition.

7. A method of forming a thermoplastic foam comprising forming a foam from the foambable compositon formed according to claim 6 .

8. The method of claim 7 , further comprising volatilizing said azeotrope-like composition during said forming.

9. The method of claim 6 , wherein said trans-1,3,3,3-tetrafluoropropene is present in said azeotrope-like composition in amounts of from about 83 to about 98 weight percent of said azeotrope-like composition.

10. The method of claim 6 , wherein said trans-1,3,3,3-tetrafluoropropene is present in said azeotrope-like composition in amounts of from about 83.4 to about 98.8 weight percent of said azeotrope-like composition.

11. The method of claim 6 , wherein said ethanol is present in said azeotrope-like composition in amounts of from about 1 to about 16 weight percent of said azeotrope-like composition.

12. The method of claim 6 , wherein said ethanol is present in said azeotrope-like composition in amounts of from about 1.2 to about 16.6 weight percent of said azeotrope-like composition.

13. The method of claim 6 , wherein said thermoplastic foam component is selected from the group consisting of polystyrene, polyethylene, polypropylene, polyethyleneterephthalate, and combinations of two or more of these.

14. The method of claim 6 , wherein said thermoplastic foam component comprises polystyrene.

Assignees

• Honeywell Int Inc

Inventors

• Bowman James M
• Singh Rajiv R
• Williams David J
• Pham Hang T
• Becker Justin L

Classifications

• A61K8/69

  containing fluorine · CPC title

• C08J2203/182

  of physical blowing agents, e.g. acetone and butane · CPC title

• A61K2800/591

  Mixtures of compounds not provided for by any of the codes A61K2800/592 - A61K2800/596 · CPC title

• C08J9/146

  only fluorine as halogen atoms · CPC title

• A61K8/046 Primary

  Aerosols; Foams · CPC title