Hydrofluoropropene blowing agents for thermoplastics
AssigneeArkema Inc.
InventorsBrett L. Van Horn, Maher Y. Elsheikh, Benjamin Bin Chen, Philippe Bonnet
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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.
Claims21
A foamed product produced comprising a thermoplastic resin and a blowing agent composition comprising 3,3,3-trifluoropropene and a hydrochlorofluoroolefin selected from the group consisting of 1-chloro-3,3,3-trifluoropropene, 2-chloro-3,3,3-trifluoropropene, and mixtures thereof, wherein said foam product has a density of below 65 kg/m3, an average cell size of between about 0.05 mm to 1.0 mm and an open-cell content less than about 20% and said foamed product comprises less than 10 wt % of said blowing agent composition and said foamed product comprises from 5.1 to 8.5 wt % of said 3,3,3-trifluoropropene.
Dependencies are inferred from the claim text.