Abstract: The present invention relates to pneumatic tires comprising a dual-layer tread made of a first layer comprising a first tread compound having a first tread property and a second layer comprising a second tread compound having a second tread property.

Abstract: A racing tire sized for a racing truck includes a tread including first and second layers formed of first and second rubber compositions. The first layer defines a first portion of a road-contacting surface of the tread. The second layer defines a second portion the road-contacting surface of the tread and is only partially covered by the first layer. The first rubber composition includes 70 to 92 phr of a solution-polymerized styrene butadiene rubber and at least one of an isoprene rubber and a polybutadiene rubber, and 50 to 160 phr of silica. The first rubber composition includes a resin at a higher phr than the second rubber composition. The second rubber composition includes 70 to 100 phr of a polyisoprene rubber, 5 to 30 phr of silica, and carbon black. Carbon black is at a higher phr in the second rubber composition than in the first rubber composition.

Abstract: The present invention relates to pneumatic tires comprising a dual-layer tread made of a first layer comprising a first tread compound having a first tread property and a second layer comprising a second tread compound having a second tread property.

Abstract: A rubber composition for an innerliner includes 100 phr of elastomers, including at least 60 phr of a butyl rubber, and 0 to 40 phr of diene-based rubber. The composition further includes 35 to 70 phr of a reinforcing filler and a curing system including zinc oxide and optionally a sulfur-based curing agent.

Abstract: A rubber composition suited to forming a tread for a winter tire includes, expressed as parts by weight per hundred parts of rubber (phr): 100 phr of an elastomer component including a polybutadiene rubber and a styrene butadiene rubber. A filler component includes at least 10 phr aluminum hydroxide, at least 70 phr silica, and 0-20 phr carbon black. The composition further includes an organosilane coupling agent, one or more processing aids, selected from liquid plasticizers, waxes, and resins and a cure package including a sulfur-based curing agent, an activator selected from inorganic activators, organic activators, and combinations, and a cure accelerator.

Abstract: The present invention is directed to a tire having a tread, wherein the tread comprises a rubber composition comprising from 80 phr to 100 phr of one or more solution-polymerized styrene butadiene rubbers; from 80 phr to 200 phr of filler comprising at least 40 phr of carbon black; from 10 phr to 100 phr of one or more liquid diene-based polymers; and from 10 phr to 80 phr of a terpene resin.

Abstract: In accordance with the invention a wire coat rubber composition for a tire comprises from 70 phr to 100 phr of cis 1,4-polyisoprene rubber, from 0 phr to 30 phr of solution styrene butadiene rubber, from 65 phr to 95 phr pre-silanized precipitated silica, from 0.1 phr to 5 phr of a cobalt salt, up to 15 phr carbon black, up to 10 phr of a resin, and up to 10 phr oil. Further the present invention is directed to a tire comprising such a wire coat composition.

Abstract: A rubber composition comprising 50 phr to 100 phr of a styrene butadiene rubber; 0 phr to 50 phr of at least one diene based rubber; 95 phr to 200 phr of filler comprising i) 50 phr to 100 phr of silica, ii) 40 phr to 70 phr of carbon black and iii) 5 phr to 30 phr of an inorganic metal hydroxide; 40 phr to 80 phr of plasticizer comprising a hydrocarbon resin having a softening point within a range of 80° C. and 130° C.

Abstract: Aspects of the present invention relate to methods for characterizing a multi-layered tire tread. In one example, a method comprises providing a first rubber composition having a first refractive index and providing a second rubber composition having a second refractive index. The method further comprises determining a difference between the first refractive index and the second refractive index and comparing the difference to a threshold refractive index. In addition, the method comprises adding a refractive index modifier to the first rubber composition and/or second rubber composition in case the comparison provides that the difference is lower than the threshold refractive index, so that the difference is greater than, or equal to, the threshold refractive index.

Abstract: Aspects of the present invention relate to a tire tread production line and a method for manufacturing a tire tread. The production line comprises a coextruder, a THz sensor and a controller operatively connected to the coextruder and to the THz sensor. The THz sensor is configured to irradiate the multi-layer tire tread extrudate with THz electromagnetic radiation, and receive a response of the multi-layer tire tread extrudate to the THz electromagnetic radiation. The controller is configured to operate the coextruder based on the response of the multi-layer tire tread extrudate to the THz electromagnetic radiation.

Abstract: In a first aspect, the present invention is directed to a tire comprising a belt portion and a tread portion radially outward of the belt portion, wherein the tread portion comprises a radially outer tread layer for contacting the road when driving and a radially inner tread layer arranged between the radially outer tread layer and the belt portion, wherein the radially outer tread layer comprises a first rubber composition having a first shear storage modulus G?1 and the radially inner tread layer comprises a second rubber composition having a second shear storage modulus G?2, wherein the second shear storage modulus G?2 is between 3 MPa and 9 MPa higher than the first shear storage modulus G?1, and wherein the first shear storage modulus G?1 ranges from 1 MPa to 3 MPa and the second shear storage modulus G?2 ranges from 4 MPa to 12 MPa.

Abstract: Aspects of the present invention relate to methods for characterizing a multi-layered tire tread. In one example, a method comprises providing a first rubber composition having a first refractive index and providing a second rubber composition having a second refractive index. The method further comprises determining a difference between the first refractive index and the second refractive index and comparing the difference to a threshold refractive index. In addition, the method comprises adding a refractive index modifier to the first rubber composition and/or second rubber composition in case the comparison provides that the difference is lower than the threshold refractive index, so that the difference is greater than, or equal to, the threshold refractive index.

Abstract: Aspects of the invention relate to a tire that includes a shoulder wedge arranged in a shoulder portion of the tire between the sidewall and the belt package, the shoulder wedge being at least partially inserted between the belt package and the carcass ply. The tread includes a tread chimney component extending from the shoulder wedge to the rolling surface. The overlay coat of the tire's belt package, the tread band except for the tread chimney component, the tread base and the tire sidewall are made from non-conductive rubber. A conductive path between the rolling surface and the rim is provided across the tread chimney component, the shoulder wedge, the carcass ply and the chafer portion.

Abstract: A rubber composition comprising 50 phr to 100 phr of a styrene butadiene rubber; 0 phr to 50 phr of at least one diene based rubber; 95 phr to 200 phr of filler comprising i) 50 phr to 100 phr of silica, ii) 40 phr to 70 phr of carbon black and iii) 5 phr to 30 phr of an inorganic metal hydroxide; 40 phr to 80 phr of plasticizer comprising a hydrocarbon resin having a softening point within a range of 80° C. and 130° C.

Abstract: The present invention is directed to a non-vulcanized rubber composition which is comprised of (1) 90 phr to 100 phr cis 1,4-polyisoprene; (2) 10 phr to 40 phr of pre-silanized precipitated silica; (3) 10 phr to 40 phr of carbon black, (4) 0.1 phr to 5 phr of a cobalt salt, and (5) 1 phr to 15 phr of a resinous reaction product of a methylene donor composition and a methylene acceptor composition. Moreover, the present invention is directed to a tire or tire component comprising the cured rubber composition.

Abstract: The present invention is directed to a rubber composition comprising 10 phr to 100 phr of at least one partially saturated elastomer comprising repeat units, wherein at most 15% of all repeat units of the elastomer comprise a double bond; 0 phr to 90 phr of at least one diene based elastomer; 40 phr to 200 phr of at least one filler; and at least 5 phr of aluminum hydroxide.

Abstract: The present invention is directed to a rubber composition comprising: 70 phr to 100 phr of at least one styrene butadiene rubber, 0 phr to 30 phr of at least one further diene-based rubber, from 40 phr to 200 phr of at least one filler, at least 5 phr of aluminum hydroxide, and at least 10 phr of at least one hydrocarbon resin selected from one or more of DCPD resins, CPD resins, and C5 resins. Furthermore, the present invention is directed to a tire comprising such a rubber composition.

Abstract: The present invention is directed to a rubber composition comprising 70 phr to 100 phr of at least one styrene butadiene rubber, 0 phr to 30 phr of at least one further diene-based rubber, from 40 phr to 200 phr of at least one filler, at least 5 phr of aluminum hydroxide, and at least 0.5 phr of a rosin based resin. Moreover, the present invention is directed to a tire comprising such a rubber composition.

Abstract: In a first aspect, the present invention is directed to a rubber composition comprising 70 phr to 100 phr of styrene butadiene rubber including a first styrene butadiene rubber having a glass transition temperature within a range of ?49° C. to ?15° C. and a second styrene butadiene rubber having a glass transition temperature within a range of ?50° C. to ?89° C. Moreover, the rubber composition comprises 10 phr to 30 phr of one or more of natural rubber and synthetic polyisoprene rubber, 40 phr to 70 phr of silica, and 10 phr to 40 phr of at least one hydrocarbon resin selected from one or more of C5 resins, CPD resins, DCPD resins, C9 modified C5 resins, C9 modified CPD resins, and C9 modified DCPD resins. In another aspect, the present invention is directed to a tire comprising a tire tread with the aforementioned rubber composition.

Abstract: In accordance with the invention a wire coat rubber composition for a tire comprises from 70 phr to 100 phr of cis 1,4-polyisoprene rubber, from 0 phr to 30 phr of solution styrene butadiene rubber, from 65 phr to 95 phr pre-silanized precipitated silica, from 0.1 phr to 5 phr of a cobalt salt, up to 15 phr carbon black, up to 10 phr of a resin, and up to 10 phr oil. Further the present invention is directed to a tire comprising such a wire coat composition.