Abstract: A polyolefin-containing adhesive blend comprising: (A) 1 to 30 parts by weight of a graft copolymer having a polyolefin backbone grafted with 0.001 to 30% by weight of at least one polymerisable ethylenically unsaturated carboxylic acid or derivative thereof, (B) 70 to 99 parts by weight of a polyolefin provided that at least 5 parts by weight of (B) is (C) a polyethylene having a density of less than 930 kgm.sup.-3 wherein the graft copolymer (A) has been reacted with a compound(D) which has at least two primary or secondary amino groups at least one of which is a primary amino group, the sum of (A), (B) and (C) being 100 parts by weight. Multilayer structures comprising a polyolefin layer, a polyketone layer and an intermediate layer of the adhesive blend are also disclosed.

Abstract: A polymer blend composition comprises a polyketone and PVC provided that the polyketone is not a propylene/CO copolymer having a molecular weight of less than 10,000. The softening point of PVC can be increased by blending with polyketones. Blends of polyketones and unplasticised PVC are particularly preferred.