Abstract: The present invention relates to a redetachable adhesive tape having a carrier based on a crosslinked polyurethane and an adhesive layer based on vinylaromatic block copolymer, to a method for producing the adhesive tape and the use of the adhesive tape in the production of electronic components.

Abstract: The present invention relates to an adhesive tape comprising at least one carrier that has a thickness of 20 to 250 ?m, preferably 50 to 150 ?m, and has at least one layer (i) based on preferably uncrosslinked thermoplastic polyurethane that has been produced by means of extrusion, wherein the polyurethane is based on aromatic polyisocyanate, such as aromatic diisocyanate in particular, or (ii) based on preferably uncrosslinked polyurethane that has been produced from a dispersion, wherein a pressure-sensitive adhesive layer is disposed on at least one side, preferably both sides, of the carrier. The invention also relates to processes for producing the adhesive tape and to the use thereof for bonding of components in electrical, electronic, optical or precision mechanical devices, such as, in particular, of windows or lenses in housings of precision mechanical, optical and/or electronic devices.

Abstract: The present invention relates to an adhesive tape of thickness 40 to 300 ?m that can be redetached without residue or destruction by stretching essentially in the plane of the bond, comprising at least one carrier of thickness 10 to 150 ?m comprising at least one layer based on preferably uncrosslinked thermoplastic polyurethane that has typically been produced by means of extrusion and has a Shore A hardness of not more than 87, where the carrier has a ratio of force at 400% elongation F400% to breaking force Fbreak of not more than 45%, and on which a pressure-sensitive adhesive layer is disposed on at least one side, and wherein the adhesive tape has a ratio of stripping force Fstrip to breaking force Fbreak of less than 60%.

Abstract: Process for producing a pressure-sensitive adhesive comprising expanded microballoons, wherein the constituents for forming the adhesive are mixed in a first mixing assembly, the mixed adhesive is transferred into a second mixing assembly into which, at the same time, unexpanded microballoons are fed, the microballoons are expanded in the second mixing assembly or on exit from the second mixing assembly, the adhesive mixture with the expanded microballoons is shaped to a layer in a shaping assembly in which expanded microballoons which have broken through the surface are pressed into the layer surface and the layer of adhesive mixture together with the expanded microballoons are optionally applied to a weblike backing material.

Abstract: A method for producing a foamed thermally crosslinked mass system, wherein the mass system is foamed at a first temperature in a first step, and crosslinker substances are added to the mass system in a subsequent step at a second temperature lower than the first temperature, wherein the crosslinker substances are crosslinker substances for thermal crosslinking of the mass system.

Abstract: A method for producing a foamed thermally crosslinked mass system, wherein the mass system is foamed at a first temperature in a first step, and crosslinker substances are added to the mass system in a subsequent step at a second temperature lower than the first temperature, wherein the crosslinker substances are crosslinker substances for thermal crosslinking of the mass system.

Abstract: Process for producing a syntactically foamed polymer composition, comprising a) introducing expandable microspheres into a matrix material and mixing in a mixing machine, b) expanding the microspheres, c) the temperature distribution in the mixing machine being inhomogeneous in a plane perpendicular to the transport direction of the machine, d) maintaining the temperature of a first surface bounding the mixing space of the mixing machine, in a plane perpendicular to the transport direction of the mixing machine, at a temperature sufficient for the polymer composition containing the microspheres coming into contact with such first bounding surface to reach a temperature sufficient for commencement and continuation of expansion, e) maintaining a second surface bonding the mixing space in the same plane at a temperature sufficiently low for the polymer composition containing the microspheres coming into contact with it, not to reach a temperature sufficient for commencement and continuation of expansion.

Abstract: Methods provide a polymer foam having high bonding strength and improved compressive hardness characteristics wherein the polymer foam comprising cavities formed by microballoons, and also 2 to 20 vol. %, based on the total volume of the polymer foam, of cavities surrounded by the polymer foam matrix.

Abstract: The invention relates to a process for preparing a foamed polymer composition using expandable hollow microbeads, wherein, in a first process strand, first starting materials, which include at least the predominant portion of the polymer or polymers to be used, are mixed and degassed to give a premix, whereafter this premix is subjected to a pressure such that the pairing of this pressure with the temperature of the premix is below the pressure and temperature pairing that is critical for triggering the expansion of the hollow microbeads to be used, wherein, in a second process strand, second starting materials, including the hollow microbeads to be used, are degassed, whereafter the second starting materials treated in the second process strand are added to the premix prepared in the first process strand, whereafter the second starting materials are mixed with the premix.

Abstract: Process for producing a syntactically foamed polymer composition, comprising a) introducing expandable microspheres into a matrix material and mixing in a mixing machine, b) expanding the microspheres, c) the temperature distribution in the mixing machine being inhomogeneous in a plane perpendicular to the transport direction of the machine, d) maintaining the temperature of a first surface bounding the mixing space of the mixing machine, in a plane perpendicular to the transport direction of the mixing machine, at a temperature sufficient for the polymer composition containing the microspheres coming into contact with such first bounding surface to reach a temperature sufficient for commencement and continuation of expansion, e) maintaining a second surface bonding the mixing space in the same plane at a temperature sufficiently low for the polymer composition containing the microspheres coming into contact with it, not to reach a temperature sufficient for commencement and continuation of expansion.

Abstract: A polymer foam having high bonding strength and improved compressive hardness characteristics is accomplished by the polymer foam comprising cavities formed by microballoons, and also 2 to 20 vol. %, based on the total volume of the polymer foam, of cavities surrounded by the polymer foam matrix.

Abstract: The present invention relates to the use of an adhesive tape for adhesively bonding photovoltaic modules, more particularly for adhesively bonding a PV laminate in the frame of a PV module, where the adhesive tape has at least one adhesive layer and where there is at least one polymer layer comprising a foaming agent.

Abstract: Pressure-sensitive adhesive comprising at least one polyisobutylene, at least one (meth)acrylate polymer or copolymer, and optionally additives, the proportion of polyisobutylene being at least 10% by weight of the pressure-sensitive adhesive.

Abstract: A method for producing a foamed mass system comprising thermally sensitive substances, wherein the mass system is foamed at a first temperature in a first step, and the thermally sensitive substances are added to the mass system in a subsequent step at a second temperature lower than the first temperature