Pressure sensitive adhesive in the form of a radiation-crosslinkable hot melt adhesive or non-aqueous adhesive, useful e.g. for producing adhesive labels, and adhesive tapes, comprises poly(meth)acrylate made of alkyl(meth)acrylates

摘要

Pressure sensitive adhesive in the form of a radiation-crosslinkable hot melt adhesive or non-aqueous adhesive comprises at least one poly(meth)acrylate, of which at least 20 wt.% is made of 13-21C alkyl(meth)acrylates. The pressure sensitive adhesive, when it is present as a melt adhesive, is radiation-crosslinkable and includes at least one photoinitiator, which is present as an additive that is not bound to the poly(meth)acrylate. The pressure sensitive adhesive, when it is present as a solution adhesive, is dissolved in an organic solvent. Pressure sensitive adhesive in the form of a radiation-crosslinkable hot melt adhesive or non-aqueous adhesive comprises at least one poly(meth)acrylate, of which at least 20 wt.% is made of 13-21C alkyl(meth)acrylates. The 13-21C alkyl groups are branched and exhibit an average degree of branching, which is represented as iso-index of 1.7-4.8. The pressure sensitive adhesive, when it is present as a melt adhesive, is radiation-crosslinkable and includes at least one photoinitiator, which is present as an additive that is not bound to the poly(meth)acrylate, and/or is polymerized into poly(meth)acrylate. The pressure sensitive adhesive, when it is present as a solution adhesive, is dissolved in an organic solvent. An independent claim is also included for pressure sensitive adhesive articles, where at least one portion of a substrate surface is coated with at least one pressure sensitive adhesive.