Abstract: A foaming composition useful to make an extruded foam is comprised of comprising a plurality of chains of a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated acids, the copolymer having about 0.01 to about 15.0 percent by weight of the one or more unsaturated acids wherein the acid groups are pendant from the copolymer a metal salt, metal oxide or combination thereof, the metal having a valence of at least 2; and one or more blowing agents. The foaming composition may be made into a foam by heating the foaming composition to a temperature sufficient to melt and ionically crosslink said copolymer which is then extruded through a die forming a foam. The foam is comprised of an ionically crosslinked aforementioned copolymer, wherein the copolymer is crosslinked through ionic bonds between the unsaturated acids and the metal of the metal salt or metal oxide.

Abstract: A foaming composition useful to make an extruded foam is comprised of: a copolymer of a vinylidene aromatic monomer and an unsaturated compound containing nucleophilic groups, a copolymer of vinylidene aromatic monomer and an unsaturated compound having electrophilic groups; and a blowing agent. The foaming composition may be made into a foam by heating the foaming composition to a temperature sufficient to melt and react said copolymers to form a chain extended/branched copolymer and extruding the foaming composition from a higher pressure to a lower pressure to form an extruded foam comprised of the chain extended/branched copolymer. The foam is comprised of a chain extended/branched copolymer that is the reaction product of (i) a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated compounds containing nucleophilic groups, and (ii) a copolymer of one or more vinylidene aromatic monomers and one or more unsaturated compounds having electrophilic groups.

Abstract: Apparatus (1) for admixing additives to a medium to be pumped, comprising at least one gear pump (2) for pumping a medium to be pumped, said gear pump (2) comprising at least one shaft (3) having a first driving torque; at least one injector (5) for introducing an additive into a medium to be pumped; at least one screw conveyor (6) for mixing said additive with said medium to be pumped, said screw conveyor having a second driving torque, and, characterized in that, the shaft (3) and the screw conveyor (6) are functionally connected, such that the first driving torque and the second driving torque are coupled.

Abstract: Apparatus (1) for admixing additives to a medium to be pumped, comprising at least one gear pump (2) for pumping a medium to be pumped, said gear pump (2) comprising at least one shaft (3) having a first driving torque; at least one injector (5) for introducing an additive into a medium to be pumped; at least one screw conveyor (6) for mixing said additive with said medium to be pumped, said screw conveyor having a second driving torque, and, characterized in that, the shaft (3) and the screw conveyor (6) are functionally connected, such that the first driving torque and the second driving torque are coupled.

Abstract: The subject invention generally provides a multilayer structure that includes a polymer mixture made from at least two polymer component materials. The invention particularly pertains to a multilayer structure containing an improved sealant layer and a polypropylene layer, wherein the sealant layer is made from a homogeneously branched ethylene polymer having particular molecular weight characteristics and a second ethylene polymer. The sealant layer has balanced properties such low heat seal and hot tack initiation temperature, a high hot tack strength and a broad hot tack seal window. The multilayer structure is particularly useful as a biaxially oriented polypropylene (BOPP) packaging film structure.