Abstract:
Pressure-sensitive adhesive for single- or double-sidedly tacky pressure-sensitive adhesive strips redetachable without residue or destruction both by extensive stretching substantially in the bond plane and by peeling, the pressure-sensitive adhesive being composed at least of (1) a vinylaromatic block copolymer, (2) a solid tackifying resin having a softening temperature by the ring-and-ball method of more than 30° C. and (3) a resin which is liquid at room temperature (23° C.), the fraction of liquid resin accounting for at least 40% by weight, based on the total amount of resin. Strips formed from the adhesive and the use of the strips to form redetachable bonds are also disclosed.
Abstract:
Heat-activable adhesive tape for producing and further processing flexible conductor tracks, with an adhesive composed at least of a) an epoxide-modified vinylaromatic block copolymer, b) an epoxy resin and c) a hardener which performs crosslinking with the epoxide groups at high temperatures, the ratio of a to b being between 40:60 and 80:20.
Abstract:
Heat-activable adhesive sheet of an adhesive comprising a blend of at least three synthetic nitrile rubber compositions S1, S2 and S3, each of which comprises at least one synthetic nitrile rubber, and at least one reactive resin which is capable of crosslinking with itself, with other reactive resins and/or with the nitrile rubbers of synthetic rubber compositions S1, S2 and S3, in which a) the blend of the heat-activable sheet being microphase-separated, characterized by at least three different glass transition temperatures in a DSC, b) at least one of said glass transition temperatures being greater than 10° C. and at least one of said glass transition temperature lower than −20° C., c) the nitrile rubber or rubbers S1 having an acrylonitrile fraction of greater than/equal to 35%, d) the nitrile rubber or rubbers S2 having an acrylonitrile fraction of greater than 25% and less than 35%, e) the nitrile rubber S3 having an acrylonitrile fraction of less than/equal to 25%.
Abstract:
Self-adhesive protective film for freshly painted automobiles, comprising a backing layer and a self-adhesive layer comprising a three-component mixture of vinyl acetate copolymers.
Abstract:
Adhesive tape strip for a rereleasable adhesive bond, which can be removed from a bonded joint by pulling in the direction of the bond plane, having a nonadhesive grip tab and a subsequent, elongate strip which is adhesive on one or both sides, characterized in that the strip has a width of 2-6 mm and a ratio of width to thickness of less than or equal to 10:1.
Abstract:
Liquid crystalline chiral nematic polyesters have flexible chains comprising isosorbide, isomannide and/or isoidide units. The polyesters are not crystalline and form stable Grandjean textures which can be frozen on cooling below the glass transition temperature. They can therefore be used in particular as surface-coating materials.
Abstract:
Heat activable adhesive tape for bonding electronic components and conductor tracks, with an adhesive composition having at least an acid-modified or acid anhydride-modified vinylaromatic block copolymer, and epoxide compound and a metal chelate.
Abstract:
Composition for preparing a crosslinked pressure-sensitive adhesive, comprising a pressure-sensitive adhesive comprising a polymer component based on one or more monomers having at least one ethylenically unsaturated bond and for which the glass transition temperatures Tg of the corresponding homopolymers are at least 0° C., some of the monomers having at least one ethylenically unsaturated bond also having at least one carboxyl group, acrylic esters and/or methacrylic esters which are each selected such that the glass transition temperatures Tg of the corresponding homopolymers are not more than −20° C., at least one resin component having a softening point of at least 100° C., and at least one difunctional or polyfunctional crosslinker.
Abstract:
Method for encapsulating an electronic arrangement against permeates wherein a pressure-sensitive adhesive mass based on butylene block copolymers is applied to and around the areas of the electronic arrangement to be encapsulated.
Abstract:
Heat-activable adhesive sheet of an adhesive comprising a blend of at least three synthetic nitrile rubber compositions S1, S2 and S3, each of which comprises at least one synthetic nitrile rubber, and at least one reactive resin which is capable of crosslinking with itself, with other reactive resins and/or with the nitrile rubbers of synthetic rubber compositions S1, S2 and S3, in which a) the blend of the heat-activable sheet being microphase-separated, characterized by at least three different glass transition temperatures in a DSC, b) at least one of said glass transition temperatures being greater than 10° C. and at least one of said glass transition temperature lower than −20° C., c) the nitrile rubber or rubbers S1 having an acrylonitrile fraction of greater than/equal to 35%, d) the nitrile rubber or rubbers S2 having an acrylonitrile fraction of greater than 25% and less than 35%, e) the nitrile rubber S3 having an acrylonitrile fraction of less than/equal to 25%.