High temperature PP adhesive
The present invention relates to an adhesive composition providing high peel strength in particular at high temperatures, an article comprising a layer of the adhesive and the use of the adhesive.
1. An adhesive composition, comprising a polypropylene component comprising at least one heterophasic propylene copolymer, wherein the adhesive composition has a peel strength at 110° C. of more than 160 N/cm and a value for MFR 2 of 5 g/10 min or more, wherein the at least one heterophasic propylene copolymer is present in an amount ranging from 98.0 to 99.5 -wt %, based on the total weight of the adhesive composition.
2. The adhesive composition in accordance with claim 1 , wherein the adhesive composition has a value for MFR 2 of from 5 to 10 g/10 min.
3. The adhesive composition according to claim 1 , wherein the polypropylene component comprises two heterophasic propylene copolymers.
4. The adhesive composition according to claim 1 , comprising a single polymeric component.
5. The adhesive composition according to claim 1 , wherein the composition has an acid number of below 1.
6. The adhesive composition according to claim 1 , wherein the at least one heterophasic propylene copolymer comprises 8 to 12-wt % of ethylene.
7. The adhesive composition according to claim 3 , wherein only one of the two heterophasic propylene copolymers has been subjected to acid grafting.
8. An article, comprising the adhesive composition according to claim 1 .
9. A method for preparing an adhesive layer comprising incorporating an adhesive composition of claim 1 within the adhesive layer.