Polyolefine materials with improved adhesivity
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsPaul Birnbrich, Herbert Fischer, Manfred Gorzinski, Thomas Huver
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Abstract
The bondability of a polyolefin, particularly to cyanoacrylate adhesives, is improved by incorporating in the polyolefin a polymerization initiator capable of initiating the polymerization of the monomers constituting the cyanoacrylate adhesive. The polymerization initiator may, for example, be a sterically hindered nitrogen base and may be mixed with the polyolefin at a temperature above the polyolefin's glass transition temperature using, for example, co-extrusion or co-injection methods.
Claims4
A polyolefin composition with improved bondability consisting essentially of
- A) at least one polyolefin;
- and
- B) at least 0.001% by weight, based on the polyolefin of at least one ionic polymerization initiator capable of initiating the polymerization of monomers corresponding to formula I
- in which R1 represents —CN or COOR3, R2 represents —CN or COOR3, and R3 represents hydrogen, a linear or branched, saturated or unsaturated, similar or different alkyl group or cycloalkyl group containing 1 to 22 carbon atoms or a phenyl group;
- wherein components A) and B) have been mixed together at a temperature above the glass transition temperature of the polyolefin;
- and wherein the at least one ionic polymerization initiator is selected from the group consisting of imidazolines, imidazolinones and polyazapolycycles.
Dependencies are inferred from the claim text.