Foaming agents and compositions containing fluorine substituted olefins, and methods of foaming

摘要

Use of a composition comprising at least one fluoroalkene having the Formula I:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ XCF z R 3-z €ƒ€ƒ€ƒ€ƒ€ƒ(I)
where X is a C 2 to C 5 unsaturated, substituted or unsubstituted radical, each R is independently Cl, F, Br, I or H, and z is 1 to 3, as an extractant for biologically-active compounds, fragrances or flavours.