Abstract: The present invention provides a jet fuel composition comprising (i) a jet fuel; (ii) a compound of Formula I wherein m is at least 1; wherein n is 0 or 1; wherein when m is 1, n is 0; wherein the or each R1 is a hydrocarbyl group with the proviso that the or each R1 is free of carboxylic acid and carboxylic ester groups; and wherein when m is 1, R1 is a polymeric group comprising at least 12 carbon atoms.

Abstract: In the extrusion of a material, which can be a metal feedstock, through a die means by maintaining frictional engagement of the material with passageway defining surfaces of a member which is moved towards the die means such that frictional drag of the passageway defining surfaces urges the material through the die means, the improvement of providing a change in cross-sectional area and/or shape of the passageway along its length in the direction of movement of the material for extruding to a product having a cross-sectional dimension larger than any cross-sectional dimension of the feed by changing the passageway such that at least one cross-sectional dimension of the passageway at the die end thereof is greater than the corresponding dimension at the inlet end thereof, or, for facilitating multiple extrusion at positions spaced apart in the lengthwise direction of the passageway at the extrusion die end thereof, by changing the passageway such that the cross-sectional area of the passageway diminishes in pr