Multilayer adhesive strip with foamed subsequently applied compounds for improving cold shock resistance
AssigneeTesa SE
InventorsThilo DOLLASE, Hans Peter GRAEF, Michael MAYER, Anika PETERSEN, Thomas SCHUBERT
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Abstract
The invention relates to a multilayer adhesive strip comprising a carrier layer and at least one adhesive layer arranged on the carrier layer, wherein the carrier layer comprises a syntactically foamed plastic; the adhesive layer comprises a syntactically foamed adhesive compound; the adhesive compound comprises one or more polymers selected from the group consisting of poly(meth)acrylates and synthetic rubbers; and the syntactically foamed plastic and the syntactically foamed adhesive compounds comprise a plurality of expanded microballoons.
Claims12
A multilayer adhesive tape, comprising a carrier layer and at least one adhesive layer disposed on the carrier layer,
- wherein the carrier layer comprises a syntactically foamed plastic,
- wherein the adhesive layer comprises a syntactically foamed pressure-sensitive adhesive,
- wherein the syntactically foamed pressure-sensitive adhesive comprises one or more polymers selected from the group consisting of poly(meth)acrylates and synthetic rubbers, and
- wherein the syntactically foamed plastic and the syntactically foamed pressure-sensitive adhesive comprise a multiplicity of expanded microballoons.
A process for producing a multilayer adhesive tape comprising the steps of:
- a) producing or providing a starting plastic comprising a multiplicity of expandable microballoons,
- b) producing or providing a starting pressure-sensitive adhesive comprising one or more polymers selected from the group consisting of poly(meth)acrylates and synthetic rubbers, and also a multiplicity of expandable microballoons, or a corresponding starting pressure-sensitive adhesive at least partly dissolved in solvent,
- c) shaping the starting plastic with expansion of the expandable microballoons to form a carrier layer which comprises a syntactically foamed plastic,
- d) producing at least one adhesive layer comprising a syntactically foamed pressure-sensitive adhesive, comprising one of the steps of
- i) shaping the starting pressure-sensitive adhesive with expansion of the expandable microballoons, or
- ii) applying the starting pressure-sensitive adhesive at least partly dissolved in solvent to a carrier, drying and optionally crosslinking the starting pressure-sensitive adhesive dissolved in solvent, and lastly heating for the expansion of the expandable microballoons, and
- e) joining the carrier layer to the at least one adhesive layer.
A method of using expanded microballoons in a carrier layer and an adhesive layer of a multilayer adhesive tape for increasing the low-temperature impact resistance.
Dependencies are inferred from the claim text.