Thermoplastic hotmelt adhesive
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsRuediger Butterbach, Siegfried Kopannia, Johannes Andres
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Abstract
A thermoplastic hot-melt adhesive based on a polymer blend of polyolefins is disclosed. An oligomer of an alpha-olefin with at least eight carbon atoms in the monomer and a molecular weight of the oligomer of up to 5,000, as well as other known additives, are added to the known mixture of a substantially amorphous poly-alpha-olefin and of a substantially crystalline poly-alpha-olefin. The impact strength, the viscosity and the flexibility at low temperatures are above all improved in this manner. These hot-melt adhesives are therefore suitable above all for gluing non-polar plastics in the automobile and electric industry.
Claims19
A thermoplastic hotmelt adhesive comprising a blend of polyolefins, which comprises:
- A) a substantially amorphous poly-.alpha.-olefin;
- B) a substantially crystalline poly-.alpha.-olefin;
- C) an oligomer of an .alpha.-olefin containing 8 to 16 carbon atoms in the monomer, the oligomer having a molecular weight of up to 5,000;
- and
- D) additives.
The hotmelt adhesive as claimed in 1, wherein at least one of the substantially amorphous poly-.alpha.-olefin and the substantially crystalline poly-.alpha.-olefin contain functional groups.
Dependencies are inferred from the claim text.