POLYMER COMPOSITION WITH IMPROVED MECHANICAL PROPERTIES

The invention is directed to a composition comprising a melt blend of at least one thermoplastic elastomer (TPE) and at least one non- crosslinked elastomer and optionally at least one catalyst for catalyzing chain extension and/or crosslinking and/or coupling reactions of the at least one non-crosslinked elastomer. The invention is also directed to a method for producing a polymer composition, to a shaped article comprising a substrate layer composed of the composition, to a method producing a shaped article, and to a method for covering a roof using the shaped articles of the present invention.The invention is directed to a composition comprising a melt blend of at least one thermoplastic elastomer (TPE) and at least one non- crosslinked elastomer and optionally at least one catalyst for catalyzing chain extension and/or crosslinking and/or coupling reactions of the at least one non-crosslinked elastomer. The invention is also directed to a method for producing a polymer composition, to a shaped article comprising a substrate layer composed of the composition, to a method producing a shaped article, and to a method for covering a roof using the shaped articles of the present invention. A butene-1 polymer composition having MFR values of from 20 to less than 100 g/10 min., measured according to ISO 1133 at 190°C with a load of 2.16 kg, comprising: A) a butene-1 homopolymer or a copolymer of butene-1 with one or more comonomers selected from ethylene and higher alpha-olefins, having a copolymerized comonomer content of up to 5% by mole; B) a copolymer of butene-1 with one or more comonomers selected from ethylene and higher alpha-olefins, having a copolymerized comonomer content of from 6% to 20% by mole; said composition having a total copolymerized comonomer content from 4% to 15% by mole, referred to the sum of A) and B), and a content of fraction soluble in xylene at 0°C of 75% by weight or less, determined on the total weight of A) and B). La invención se dirige a una composición que comprende una combinación fusionada del al menos un elastómero termoplástico (TPE) y al menos un elastómero no reticulado y, opcionalmente, al menos un catalizador para catalizar las reacciones de extensión de cadena y/o de reticulación y/o acoplamiento del al menos un elastómero no reticulado. La invención también se dirige a un método para producir una composición polimérica, a un artículo con forma que comprende una capa de sustrato compuesta de la composición, a un