The invention relates to a curable volume expandable polymer composition comprising an organic acid component, wherein the organic acid component comprises a first organic acid, a second organic acid, and optionally one or more additional organic acids; wherein said polymer composition, when being heated to an activation of expansion temperature above room temperature, undergoes volume expansion. When the organic acid component is heated to the activation of expansion temperature, the first organic acid and/or the second organic acid and/or the optionally present one or more additional organic acids decarboxylate and thus release carbon dioxide. The polymer composition traps the thus released carbon dioxide thereby causing the polymer composition to undergo volume expansion.

A laminate that includes: (i) a first pressure-sensitive adhesive layer, the first layer comprising a block copolymer containing at least one polymer block formed from vinylaromatics and at least one polymer block formed from alkenes; (ii) a metal layer disposed on the first layer; (iii) a blowing agent layer disposed on the metal layer; and (iv) a second pressure-sensitive adhesive layer disposed on the blowing agent layer, the second layer comprising a block copolymer containing at least one polymer block formed from vinylaromatics and at least one polymer block formed from alkenes.

A reinforcing sheet including one or more layers of a reinforcing material, and a thermosetting adhesive associated with the reinforcing material, wherein the thermosetting adhesive includes a curing agent, and an epoxy-modified dimerized fatty acid combined with an epoxy terminated polyurethane interpenetrating network.

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.

Various embodiments disclosed related to sealant tape. The sealant tape can include a cured product of a sealant composition including a curable liquid that includes a polysulfide, a polythioether, a copolymer thereof, or a combination thereof. The sealant composition also includes a curing agent for curing the curable liquid. Various embodiments provide cured products of the sealant composition, sealant tapes including the cured product, and sealant tapes including any suitable material with an adhesive pattern thereon.

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.

A foamable adhesive system is provided which can achieve necessary adhesion to an oily surface and which is not tacky to the touch once applied to the surface and has a melt viscosity in the bake phase high enough to retain its shape and adhesion to the substrate and in addition a melt viscosity sufficiently high to retain gas bubbles formed by the decomposition of the blowing agent and which also retains its shape and structure once formed by use of a polymer system containing a thixotropic filler and a two compartment (component) cross linking system.

A thin foam layer is provided comprising: a) a polymeric matrix; and dispersed therein b) expanded polymeric microspheres comprising a polymeric shell and a hollow interior; wherein the thin foam layer has a thickness of less than 325 microns, in some embodiments less than 200 microns, or in some embodiments less than 110 microns, and the expanded polymeric microspheres have an average diameter of less than 100 microns, or in some embodiments less than 50 microns. In some embodiments the thin foam layer comprises greater than 0.7 wt % expanded polymeric microspheres, and in some greater than 1.0 wt %. The present disclosure additionally provides tapes comprising the thin foam layer of the present disclosure.

The invention relates to a structural adhesive formulation, which is heat activatable at a heat activation temperature; meltable without heat activation at an application temperature above its melting point and below the heat activation temperature; and solid at ambient temperature; wherein upon heat activation the structural adhesive formulation is capable of expansion with a volumetric expansion of up to about 250 vol.-%; wherein the heat activatable structural adhesive formulation comprises (a) an epoxy resin component; (b) an adhesion promoter component; (c) a cross-linking component; (d) a blowing component; (e) optionally, an impact modifier component; (f) optionally, a thixotropic filler component; and (g) optionally, a non-thixotropic filler component. The structural adhesive formulation is particularly useful for application by means of a hot melt applicator, preferably a hand held hot melt gun.

Provided is a method for producing a self-adhesive to be arranged on a package comprising a space to store contents and an opening by which the space and an outside communicate, wherein the opening is repeatedly openable and sealable by the self-adhesive that consists of a cross-linking material of a resin composition containing a (meth)acrylic acid ester copolymer resin having a glass transition temperature of 22.8 C. or more, and a crosslinking agent. The method comprises making the resin composition that contains the (meth)acrylic acid ester copolymer resin, and the crosslinking agent, the resin composition being either emulsion or dispersion; and cross-linking the resin composition.