Electron beam crosslinking of polyacrylates
AssigneeTesa SE
InventorsMarc Husemann, Stephan Zollner
Life of this patent
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Abstract
A process for crosslinking polyacrylate compositions, wherein, by selective irradiation of the pressure-sensitive adhesive composition with electron beams, the polymer is cured only in certain structures and, as a result, structured pressure-sensitive adhesive compositions can be prepared.
Claims10
A process for crosslinking polyacrylate compositions, wherein, by selective irradiation of the pressure-sensitive adhesive composition with electron beams, the polymer is cured only in certain structures and, as a result, structured pressure-sensitive adhesive compositions can be prepared.
The process for crosslinking polyacrylate compositions as claimed in any of the above claims, wherein the polyacrylate composition used comprises polyacrylates and/or polyacrylate copolymers of the following monomers:
- a) acrylic monomers of the general formula
- CH2═CH(R1)(COOR2)
- where R1=H or CH3 and R2 is an alkyl chain with 2-20 carbon atoms, at 20-100 percent by weight,
- b) acrylic monomers of the general formula
- CH2═CH(R1)(COOR3)
- where R1=H or CH3 and R3═H or CH3, at 0-35 percent by weight,
- c) acrylic monomers of the general formula
- CH2═CH(R1)(CONHR4)
- where R1=H or CH3 and R4=H or an alkyl chain with 1-6 carbon atoms, at 0-20 percent by weight,
- d) olefinically unsaturated monomers containing functional groups at 0-25 percent by weight.
The process as claimed in any of the above claims, wherein crosslinkers are added to the polyacrylated composition to be crosslinked.
The process as claimed in any of the above claims, wherein bifunctional and/or polyfunctional acrylates and/or methacrylates are added as crosslinkers.
The use of the polyacrylate of any of the above claims as a pressure-sensitive adhesive composition.
The use of the polyacrylate of any of the above claims as a pressure-sensitive adhesive composition for an adhesive tape, the polyacrylate composition being present as a single-sided or double-sided film on a backing.
The use as claimed in one of the above claims, wherein additional fillers, expansion agents, hollow beads, solid beads and/or compounding agents are used.
Dependencies are inferred from the claim text.