The invention relates to aA reinforced product, which can be used especially for reinforcing a finished rubber article, comprisingcomprises one or more textile or metallic reinforcing thread(s), said thread(s) being covered with a sheath comprising a thermoplastic polymer composition, the sheathed thread(s) being themselves embedded in a rubber composition referred to as coating rubber, characterized in that this coating rubber is a composition based on at least one diene elastomer, a reinforcing filler, and a sulphursulfur-based vulcanization system, which system comprises a vulcanization accelerator having a vulcanization initiation time, referred to as “t0”, of less than 3.5 minutes, preferably of less than or equal to 3 minutes.

Provided is a thermoplastic elastomer composition capable of producing a molded article having a good appearance such as surface smoothness and excellent bondability to another member, the thermoplastic elastomer composition comprising: an ethylene-based polymer (A); and a propylene-based polymer (B), wherein a melt viscosity of the thermoplastic elastomer composition measured at a temperature of 220° C. and a shear rate of 12 sec.sup.−1 is 2,500 Pa.Math.sec or less; the thermoplastic elastomer composition has a sea-island structure; and an island portion has a volume average particle diameter of 2.1 μm or more and a particle diameter dispersion D of 7.0 or less.

Provided is a thermoplastic elastomer composition capable of producing a molded article having a good appearance such as surface smoothness and excellent bondability to another member, the thermoplastic elastomer composition comprising: an ethylene-based polymer (A); and a propylene-based polymer (B), wherein a melt viscosity of the thermoplastic elastomer composition measured at a temperature of 220° C. and a shear rate of 12 sec.sup.−1 is 2,500 Pa.Math.sec or less; the thermoplastic elastomer composition has a sea-island structure; and an island portion has a volume average particle diameter of 2.1 μm or more and a particle diameter dispersion D of 7.0 or less.

A tire is provided with an outer sidewall, said outer sidewall comprising at least a rubber composition based on at least an elastomer, a reinforcing filler, a crosslinking system and more than 25 phr of a crumb rubber.

A tire is provided with an outer sidewall, said outer sidewall comprising at least a rubber composition based on at least an elastomer, a reinforcing filler, a crosslinking system and more than 25 phr of a crumb rubber.

The present invention is directed to a vulcanizable rubber composition comprising, based on parts by weight per 100 parts by weight elastomer (phr): 100 phr of at least one diene-based elastomer; from 1 to 80 phr of carbon black; from 40 to 120 phr of silica; from 1 to 20 parts by weight of a sulfur-containing organosilane per 100 parts by weight of the silica; from 0.1 to 10 phr of a tetrazine compound of formula 1

##STR00001##

where X.sup.1 and X.sup.2 each represent a heterocyclic group; and from 0.5 to 10 phr of a zinc complex compound of formula 2

##STR00002##

where R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen atoms, alkyl groups, alkylene groups, hydroxyl-substituted alkyl or alkylene groups, amine-substituted alkyl or alkylene groups, and thiol-substituted alkyl or alkylene groups.

The present invention is directed to a vulcanizable rubber composition comprising, based on parts by weight per 100 parts by weight elastomer (phr): 100 phr of at least one diene-based elastomer; from 1 to 80 phr of carbon black; from 40 to 120 phr of silica; from 1 to 20 parts by weight of a sulfur-containing organosilane per 100 parts by weight of the silica; from 0.1 to 10 phr of a tetrazine compound of formula 1

##STR00001##

where X.sup.1 and X.sup.2 each represent a heterocyclic group; and from 0.5 to 10 phr of a zinc complex compound of formula 2

##STR00002##

where R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen atoms, alkyl groups, alkylene groups, hydroxyl-substituted alkyl or alkylene groups, amine-substituted alkyl or alkylene groups, and thiol-substituted alkyl or alkylene groups.

A vibration isolation rubber composition containing the following components (B) to (E) together with a rubber compound made of the following (A) is produced, which makes it possible to highly satisfy both heat resistance and the reduction of dynamic magnification factors. The vibration isolation rubber composition containing (A) a diene-based rubber containing natural rubber as a main component, (B) a filler, (C) a hydrazide compound, (D) a disulfide compound represented by General Formula (1), and (E) a sulfur-based vulcanizing agent.

##STR00001##

[In General Formula (1), a ring A and a ring B each indicate a nitrogen-containing heterocyclic group having 4 to 24 carbon atoms.]

A vibration isolation rubber composition containing the following components (B) to (E) together with a rubber compound made of the following (A) is produced, which makes it possible to highly satisfy both heat resistance and the reduction of dynamic magnification factors. The vibration isolation rubber composition containing (A) a diene-based rubber containing natural rubber as a main component, (B) a filler, (C) a hydrazide compound, (D) a disulfide compound represented by General Formula (1), and (E) a sulfur-based vulcanizing agent.

##STR00001##

[In General Formula (1), a ring A and a ring B each indicate a nitrogen-containing heterocyclic group having 4 to 24 carbon atoms.]

A heavy vehicle tire tread that contains a rubber component and a reinforcing filler that includes silica and a second filler. A first and second vulcanization accelerator are used together with sulfur and a silane coupling agent in the tire tread, wherein the 300% modulus of the tire tread is 8 MPa or more. The silane coupling agent, sulfur and total reinforcing filler content in the tire tread composition are present in a ratio range of 1:0.4:0.4 to 1:1.4:1.4.