Hydrofluoropropene blowing agents for thermoplastics

a technology of hydrofluoropropene and blowing agent, which is applied in the direction of transportation and packaging, other chemical processes, organic chemistry, etc., can solve the problems of more difficult control of foaming, higher operating pressure for some extrusion systems, and more difficult processing of thermoplastic foam being blown with hfc's than with cfc's or hcfc's
US20100112328A1Inactive Publication Date: 2010-05-06ARKEMA INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ARKEMA INC
Publication Date
2010-05-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to blowing agent compositions comprising the unsaturated halogenated hydroolefin 3,3,3-trifluoropropene (HFO 1243zf) and combinations including primarily 3,3,3-trifluoropropene (HFO 1243zf). The blowing agent compositions are useful in that they provide sufficient plasticization to permit the production of low density insulating thermoplastic foams with improved k-factor.
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Description

SUMMARY OF INVENTION

[0001] The present invention relates to blowing agent compositions comprising the unsaturated halogenated hydroolefin, 3,3,3-trifluoropropene (HFO 1243zf or TFP), alone and in combination with compatible materials used in the preparation of thermoplastic foam compositions. HFO 1243zf blowing agent compositions are useful in that they provide sufficient plasticization to permit the production of low density insulating foams with improved k-factor.BACKGROUND OF INVENTION

[0002] HFC's, being non-ozone depleting compounds, have been identified as alternative blowing agents to chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) in the production of thermoplastic foams. However, it has been found that it can be more difficult to process thermoplastic foams being blown with HFC's than with CFC's or HCFC's. For instance in the production of extruded polystyrene (XPS) foam, HFC-134a (tetrafluoroethane) and HFC-125 (pentafluoroethane) have limited solubility and h...

Claims

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