The environmental footprint of a tire for a construction plant vehicle is improved. To do so, the elastomer compounds derived from non-fossil resources represent a mass content greater than or equal to 65% of the total mass of the compounds of the tire, at least 75% of the total mass of the compounds of the tire is made up of elastomer compounds each of which has a viscoelastic loss, measured in terms of tan(δ), less than or equal to 0.065, and an electrical resistivity greater than or equal to 1E+10 ‘Ω.Math.cm.

A rubber composition comprises at least one resin based on: (A1) at least one aromatic compound resulting from the reaction between a reactant of formula (α): ##STR00001##
where B represents CHO or CH.sub.2OH, (α) and a reactant of formula (β) or ##STR00002##
and (A2) at least one phenolic compound chosen from: (A21) at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functional groups in the meta position with respect to one another, the two positions ortho to at least one of the hydroxyl functional groups being unsubstituted; and/or (A22) at least one aromatic monophenol comprising at least one six-membered aromatic ring bearing a single hydroxyl functional group, the two positions ortho to the hydroxyl functional group being unsubstituted or at least one position ortho to and the position para to the hydroxyl functional group being unsubstituted.

The present invention provides a rubber composition for cushion rubber for rehabilitated tire having a vulcanized speed being fast and a scorch resistance property being superior while being adaptable to environmental issues, as well as provides a rehabilitated tire having a durability. This rehabilitated tire may include a rubber composition for cushion rubber for rehabilitated tire which includes at least a rubber component comprising a diene rubber, di-2-benzothiazolyl disulfide and 1,3-diphenylguanidine, and a cushion rubber formed by vulcanizing the rubber composition for cushion rubber for rehabilitated tire.

The invention relates to a sulfur-crosslinkable rubber mixture, in particular for rubber-coating reinforcements in elastomer products, especially in vehicle tires, or inner components of vehicle tires, as well as to a vehicle tire. The rubber mixture comprises a diene rubber, an adhesive system, 10 to 200 phr silica, and 2 to 20 phr of a silane of the formula [(R.sup.1).sub.3Si—X].sub.mS.sub.n(R.sup.2).sub.2-m, where residues R.sup.1 are identical or different alkoxy groups, cyclic dialkoxy groups, cycloalkoxy groups, phenoxy groups, aryl groups, alkyl groups, alkenyl groups, aralkyl groups, or halides, and where X is a polar organic group containing urea, m represents the value 1 or 2, n is an integer between 1 and 8, and R.sup.2 is a hydrogen atom or an acyl group comprising 1 to 20 carbon atoms.

Metallated aminosilane compounds for use as functional initiators in anionic polymerizations and processes for producing an aminosilane-functionalized polymer using the metallated aminosilane compounds to initiate anionic polymerization of at least one type of anionically polymerizable monomer. Preferred use of the metallated aminosilane compounds results in rubber compositions for use in tires comprising an aminosilane functionalized polymer.

A method for preparing a modified rubber introduces a reactive group into a high-performance short fiber by irritating the short fiber by ultraviolet light, and modifies the short fiber by a coupling agent to increase the compatibility of the short fiber with a rubber matrix, and finally, utilizes the charge repulsion of sodium lauryl sulfate to effectively avoid the agglomeration of the short fibers in the rubber matrix, which is benefit for obtaining the modified rubber. The present disclosure further provides a modified rubber prepared by the method and a bulletproof and puncture resistant tire prepared by the modified rubber, wherein a buffer layer is made by the modified rubber, and at least one of a tread, a belt ply and an inner liner is made by the modified rubber, and a cord ply is woven by twisted high-performance long fibers.

A rubber composition comprises at least one resin based on: (A1) at least one aromatic compound resulting from the reaction between a reactant of formula ():

##STR00001##

where B represents CHO or CH.sub.2OH, () and a reactant of formula () or

##STR00002##

and (A2) at least one phenolic compound chosen from: (A21) at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functional groups in the meta position with respect to one another, the two positions ortho to at least one of the hydroxyl functional groups being unsubstituted; and/or (A22) at least one aromatic monophenol comprising at least one six-membered aromatic ring bearing a single hydroxyl functional group, the two positions ortho to the hydroxyl functional group being unsubstituted or at least one position ortho to and the position para to the hydroxyl functional group being unsubstituted.

Tire comprising a crown reinforcement formed of at least two working crown layers each formed of reinforcing elements inserted between two skim layers of rubber compound. First layer S of polymer compound is in contact with a working crown layer and the carcass reinforcement. The crown reinforcement comprises a layer of circumferential reinforcing elements. The elastic modulus under tension at 10% elongation of a skim layer of a working crown layer is less than 8.5 MPa, the maximum value of tan() of the skim layer of a working crown layer is <0.100. First layer S comprises a filled elastomer blend having a macro dispersion coefficient Z65 and a maximum tan() value <0.100 and its complex dynamic shear modulus G*, measured at 10% and 60 C. on the return cycle is >1.35 MPa.

Tire comprising a crown reinforcement formed of at least two working crown layers of reinforcing elements. First layer C of rubber compound is placed between ends of the two working crown layers. Second layer S of polymer compound is in contact with at least one working crown layer and with the carcass reinforcement. The crown reinforcement includes at least one layer of circumferential reinforcing elements. The elastic modulus under tension at 10% elongation of first layer C is less than 8 MPa, the maximum value of tan() of first layer C is less than 0.100. The second layer S is made up of a filled elastomer blend having a macro dispersion coefficient Z greater than or equal to 65 and a maximum tan() value less than 0.100, and its complex dynamic shear modulus G*, measured at 10% and 60 C. on the return cycle, is greater than 1.35 MPa.

Tire comprising a crown reinforcement formed of two working crown layers having unequal axial widths, layer C of rubber compound between ends of the working crown layers, layer S of polymer compound in contact with at least one working crown layer and in contact with the carcass reinforcement and the crown reinforcement comprising a layer of circumferential reinforcing elements arranged radially between two working crown layers. Distance d between the end of the axially narrowest working layer and the working layer separated from the axially narrowest working layer by the layer C is 1.1<d<2.2, being the diameter of the reinforcing elements of the layer of circumferential reinforcing elements, in a meridian plane. The thickness of layer C is substantially constant and the complex dynamic shear modulus G*, measured at 10% and 60 C. on the return cycle, of layer S is greater than 1.35 MPa.