ADHESIVE COMPOSITIONS BASED ON BLENDS OF GRAFTED POLYETHYLENES AND NON-GRAFTED POLYETHYLENES AND STYRENE CONTAINING RUBBER

摘要

The invention relates to adhesive compositions having a modified polyethylen e; an unmodified polyethylene of a certain density and a styrene-based elastome r. The styrene-based elastomer is present in a weight percentage of 10 to 45 wt . percent relative to the total weight of the elastomer plus the modified and unmodified polyethylenes. The adhesive composition is particularly useful in multilayer composite structures having polypropylene as one substrate and having bonded thereto a polyethylene or a layer which is made from an ethyle ne copolmer such as an ethylene/acid copolymer or an ethylene acid ionomer. In addition, the adhesive composition is particularly useful in multilayer structures having five layers wherein a single adhesive composition is neede d as layer two and four and the other structural layers are, for example, polyethylene/nylon/polypropylene or similar structures which would heretofor e require two different polyolefin base adhesives.