Abstract: A transparent, semi-interpenetrating network comprises a first phase of a linear noncrosslinked isobutene polymer and a second phase of a crosslinked polymer. The crosslinked polymer is obtained through copolymerization of a first ethylenically unsaturated monomer and of a second ethylenically unsaturated monomer, wherein the first ethylenically unsaturated monomer is a cycloalkyl(meth)acrylate and the second ethylenically unsaturated monomer is selected from linear and branched C1-C20 alkyl(meth)acrylates. By varying the ratio of the first ethylenically unsaturated monomer relative to the second ethylenically unsaturated monomer, the properties, such as vibration damping properties, of the semi-interpenetrating network can be controlled.

Abstract: A description is given of a semi-interpenetrating network having a first phase of a linear noncrosslinked isobutene polymer and a second phase of a crosslinked polymer, wherein the crosslinked polymer is obtained by crosslinking molecular enlargement reaction in the presence of the isobutene polymer. The crosslinked polymer is preferably obtained by free-radical polymerization of ethylenically unsaturated monomers comprising at least one polyethylenically unsaturated monomer. The networks are suitable as molding compounds having gas and moisture barrier effect or as adhesives.

Abstract: The invention relates to an electrically-controllable device with variable optical/energy reflection or transmission properties. The invention is characterised in that the device is shaped in the form of a self-supporting film, said film being formed from a mixture comprising at least one first element which provides the mixture with an electrochrome functionality and at least one second element which produces an electrolyte functionality for ionic charge transfer within said mixture.