Blowing Agent Compositions of Hydrofluoroolefins and Hydrochlorofluoroolefins
AssigneeArkema Inc.
InventorBenjamin Bin CHEN
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Abstract
The present invention relates to blowing agent compositions comprising at least one hydrofluoroolefin (HFO) selected from cis- and/or trans- 1,3,3,3-tetrafluoropropene (HFO-1234ze) and at least one hydrochlorofluoroolefin (HCFO) selected from cis- and/or trans- 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) used in the preparation of foamable thermoplastic compositions. The blowing agent compositions are useful in the production of low density insulating foams with improved k-factor.
Claims10
A polystyrene foam product comprising a blowing agent composition comprising a combination of the hydrofluoroolefin trans-1,3,3,3-tetrafluoropropene and the hydrochlorofluoroolefin trans-1-chloro-3,3,3-trifluoropropene wherein the molar ratio of trans-1,3,3,3-tetrafluoropropene to trans-1-chloro-3,3,3-trifluoropropene is from about 5 to 95 to about 35 to 65 and wherein said thermoplastic foam product has a density less than the density produced by 100 mole % trans-1-chloro-3,3,3-trifluoropropene.
Dependencies are inferred from the claim text.