Elastomeric ethylene copolymers for hot melt adhesives
AssigneeExxon Chemical Patents Inc.
InventorsMun Fu Tse, Aspy Keki Mehta, Vince Leo Hughes
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Abstract
Disclosed are hot melt adhesives comprising ethylene/alpha-olefin copolymers prepared with either supported or unsupported metallocene-alumoxane catalysts for applications in hot melt adhesives used in automotive product assembly, packaging and food packaging. These ethylene copolymers have weight average molecular weight ranging from about 20,000 to about 100,000 and comonomer weight percent ranging from about 6 to about 30. The hot melt adhesive composition includes the ethylene copolymer and a compatible tackifier at a ratio of tackifier to copolymer of from 70:30 to 30:70 and may also include up to 30 weight percent of a paraffinic and microcrystalline wax of the copolymer and tackifier.
Claims5
A hot melt adhesive composition comprising:
- a copolymer of ethylene and about 6 to 30 wt % of a C4 to C20 alpha olefin, wherein said copolymer was produced in the presence of a catalyst comprising a cyclopentadienyl-transition metal compound, said copolymer comprising from about 30 to 70 wt % of said composition and having a weight average molecular weight in the range from greater than 40,000 to about 100,000;
- and a tackifier.
Dependencies are inferred from the claim text.