An elastomeric composition is disclosed. The elastomeric composition includes, per 100 parts by weight of rubber (phr): about 5 to about 40 phr of styrene/butadiene copolymer; about 60 to about 100 phr of natural mbber or polyisoprene; a curative agent; an antioxidant; about 1 to about 20 phr carbon black; about 5 to about 40 phr plasticizing agent; about 40 to about 80 phr silica; about 1 to about 20 phr silane coupling agent and about 5 to about 30 phr of a polymer selected from the group consisting of ethyl-ene-propylene-diene terpolymer, butyl mbber, poly(isobutylene-co-para-methylstyrene) and poly(isobutylene-co-para-methylstyrene-co-isoprene) terpolymer. The polymer based on ethylene-propylene-diene terpolymer, butyl mbber, poly(isobutylene-co-para-methylstyrene) and poly(isobutylene-co-para-methylstyrene-co-isoprene) terpolymer may be functionalized.

Provided is a thermoplastic elastomer composition obtained by melt-kneading (A) an ethylene/α-olefin/non-conjugated polyene copolymer rubber that is a copolymer of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, (B) a polyolefin resin and (C) a mineral oil-based softening agent in the presence of (D) a crosslinking agent, at least part of the ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) being crosslinked, the thermoplastic elastomer composition having a sea-island structure in which the ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) is dispersed as a dispersed phase (island phase) in a continuous phase (sea phase) of the polyolefin resin (B), and when a cross-section of the composition is observed with an atomic force microscope (AFM), a ratio of (b) a local elastic modulus of the continuous phase to (a) a local elastic modulus of the dispersed phase being from 10 to 30.

Provided is a thermoplastic elastomer composition obtained by melt-kneading (A) an ethylene/α-olefin/non-conjugated polyene copolymer rubber that is a copolymer of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, (B) a polyolefin resin and (C) a mineral oil-based softening agent in the presence of (D) a crosslinking agent, at least part of the ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) being crosslinked, the thermoplastic elastomer composition having a sea-island structure in which the ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) is dispersed as a dispersed phase (island phase) in a continuous phase (sea phase) of the polyolefin resin (B), and when a cross-section of the composition is observed with an atomic force microscope (AFM), a ratio of (b) a local elastic modulus of the continuous phase to (a) a local elastic modulus of the dispersed phase being from 10 to 30.

A composition including 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. Further, a method for producing a polymer composition, to a shaped article including 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.

A composition including 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. Further, a method for producing a polymer composition, to a shaped article including 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.

A composition including 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. Further, a method for producing a polymer composition, to a shaped article including 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.

The invention is directed to a polypropylene composition, to a three-dimensional article comprising said polypropylene composition, and to the use of said composition for automotive articles. The polypropylene composition of the invention comprises: 40-90% by total weight of the composition of a polymer blend comprising polypropylene having a melt flow index as measured according to ISO 1133 at 230° C. and 2.16 kg of 2.0-100 g/10 min; 5-25% by total weight of the composition of one or more plastomers; 0.5-25% by total weight of the composition of mineral filler selected from the group consisting of phyllosilicates, mica or wollastonite; and 0.2-4% by total weight of the composition of glass fibres having an average fibre diameter in the range of 5-30 μm.

The invention is directed to a polypropylene composition, to a three-dimensional article comprising said polypropylene composition, and to the use of said composition for automotive articles. The polypropylene composition of the invention comprises: 40-90% by total weight of the composition of a polymer blend comprising polypropylene having a melt flow index as measured according to ISO 1133 at 230° C. and 2.16 kg of 2.0-100 g/10 min; 5-25% by total weight of the composition of one or more plastomers; 0.5-25% by total weight of the composition of mineral filler selected from the group consisting of phyllosilicates, mica or wollastonite; and 0.2-4% by total weight of the composition of glass fibres having an average fibre diameter in the range of 5-30 μm.

Provided herein are metallocene-catalyzed polymer compositions that exhibit advantageous rheological properties, at least some of which are consistent with long-chain branching, as well as polymerization processes suitable for forming such polymer compositions. The polymer compositions may have both LCB index measured at 125° C. of less than 5; and phase angle δ at complex shear modulus G*=100,000 Pa of less than about 54.5°, as determined at 125° C. The polymer compositions of particular embodiments are reactor blends, preferably of ethylene copolymers (e.g., ethylene-propylene (EP) copolymers and/or ethylene-propylene-diene (EPDM) terpolymers). The reactor blend may include first and second copolymer components, which may differ in monomer content and weight-average molecular weight (Mw).

Provided herein are metallocene-catalyzed polymer compositions that exhibit advantageous rheological properties, at least some of which are consistent with long-chain branching, as well as polymerization processes suitable for forming such polymer compositions. The polymer compositions may have both LCB index measured at 125° C. of less than 5; and phase angle δ at complex shear modulus G*=100,000 Pa of less than about 54.5°, as determined at 125° C. The polymer compositions of particular embodiments are reactor blends, preferably of ethylene copolymers (e.g., ethylene-propylene (EP) copolymers and/or ethylene-propylene-diene (EPDM) terpolymers). The reactor blend may include first and second copolymer components, which may differ in monomer content and weight-average molecular weight (Mw).