Abstract: A 1,3-dipolar compound including an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom having an attachment to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. The use of the 1,3-dipolar compound in the modification of a diene polymer makes it possible to improve the rupture properties of a rubber composition comprising the modified polymer, without the expense of its hysteresis properties, while at the same time improving its implementation.

Abstract: A rubber composition having improved antiozonation performance comprising a substituted hydroxyl-phenyl-p-(hydroxy)phenylenediamine. Such a composition is particularly suitable for rubber articles. The improved rubber composition possesses a long lasting antiozonation performance, slowing migration through the rubber article and reducing effluence of the antiozonant. Such rubber articles may include rubber pneumatic tires, solid tires, non-pneumatic tires, belts, hoses, cables, automotive mounts, bushings and general mechanic products that are exposed to continuous and intermittent dynamic operation conditions and require protection from ozonation.

Abstract: A rubber composition based on at least one diene elastomer, a reinforcing filler and a 1,3-dipolar compound comprising an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom exhibiting a connection to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. Such a rubber composition exhibits improved properties at break and an improved processing, as well as good hysteresis properties.

Abstract: A rubber composition based at least on a functional elastomer and a reinforcing filler which comprises a carbon black is provided. The functional elastomer is a diene elastomer which comprises diene units in the cis-1,4 configuration and pendant groups of formula (I). The Y1, Y2, Y3 and Y4 symbols, which are identical or different, represent an atom or a group of atoms, and at least one of the symbols denotes an attachment to a diene unit of the elastomer. The diene units in the cis-1,4 configuration represent at least 90 mol % of the diene units of the functional elastomer, and the carbon black represents more than 50% by weight of the reinforcing filler.

Abstract: A diene elastomer and a rubber composition comprising the diene elastomer is provided. The diene elastomer bears pendent imidazole functions in a molar content of at most 4% of the constituent repeating units of the diene elastomer, which diene elastomer is a copolymer of ethylene and of a 1,3-diene comprising ethylene units, the ethylene units representing at least 50 mol % of the constituent repeating units of the diene elastomer, the 1,3-diene being 1,3-butadiene or isoprene. Such an elastomer confers improved uncured properties on the rubber composition.

Abstract: In a 1,3-dipolar compound of formula Q-A-B, Q comprises a dipole containing at least and preferably one nitrogen atom, A, which is preferably divalent, is an atom or a group of atoms connecting Q to B, and B comprises an imidazole ring. An unsaturated polymer modified by grafting the 1,3-dipolar compound is also disclosed.

Abstract: A diene polymer including at least one specific epoxide side group, one of the carbon atoms of which simultaneously has an attachment to the polymer chain and is a trisubstituted carbon, and the other carbon atom is an at least trisubstituted carbon is provided. The introduction of such a polymer, in particular elastomer, into a rubber composition makes it possible to improve its rupture properties without this being at the expense of its hysteresis properties, while at the same time improving its implementation.

Abstract: A 1,3-dipolar compound including an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom having an attachment to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. The use of the 1,3-dipolar compound in the modification of a diene polymer makes it possible to improve the rupture properties of a rubber composition comprising the modified polymer, without the expense of its hysteresis properties, while at the same time improving its implementation.

Abstract: A rubber composition based at least on a reinforcing filler comprising a carbon black and on a natural rubber is provided. The natural rubber is modified so that it carries pendent groups of formula (I) in which the symbols Y1, Y2, Y3 and Y4, which may be identical or different, represent an atom or a group of atoms. At least one of the symbols Y1, Y2, Y3 and Y4 denotes an attachment to an isoprene unit of the modified natural rubber.

Abstract: The invention relates to an alkoxysilane polysulfide, of formula (I): (R3O)3-n(R1)nSi—CH2—(R2)CH—Z—Sx—Z—HC(R2)—CH2—Si(R1)n(OR3)3-n??(I), in which: R1, which are identical or different, each represent a monovalent hydrocarbon group having from 1 to 18 carbon atoms; R2, which are identical or different, each represent a monovalent hydrocarbon group having from 1 to 4 carbon atoms; R3, which are identical or different, each represent a monovalent hydrocarbon group having from 1 to 12 carbon atoms, preferably from 1 to 6 carbon atoms; Z, which are identical or different, each represent a divalent hydrocarbon bonding group comprising from 1 to 16 carbon atoms; x is an integral or fractional number greater than or equal to 2; and n is an integer equal to 0, 1 or 2.

Abstract: An elastomeric composition is based on at least a diene elastomer, an inorganic filler as reinforcing filler and a monohydroxysilane polysulfide as coupling agent of formula (I): (HO)(R1)2Si—CH2—(R2)CH—Z—Sx—Z—HC(R2)—CH2—Si(R1)2(OH) (I), in which: each R1 represents a monovalent hydrocarbon group having from 1 to 18 carbon atoms and can be the same or different from one another; each R2 represents a monovalent hydrocarbon group having from 1 to 4 carbon atoms and can be the same or different from one another; each Z represents a divalent hydrocarbon bonding group comprising from 1 to 16 carbon atoms can be the same or different from one another; and x is an integral or fractional number greater than or equal to 2.

Abstract: A rubber composition based at least on a functional elastomer and a reinforcing filler which comprises a carbon black is provided. The functional elastomer is a diene elastomer which comprises diene units in the cis-1,4 configuration and pendant groups of formula (I). The Y1, Y2, Y3 and Y4 symbols, which are identical or different, represent an atom or a group of atoms, and at least one of the symbols denotes an attachment to a diene unit of the elastomer. The diene units in the cis-1,4 configuration represent at least 90 mol % of the diene units of the functional elastomer, and the carbon black represents more than 50% by weight of the reinforcing filler.

Abstract: Rubber compositions having a modified rubber component selected from a modified polybutadiene rubber, a modified styrene-butadiene rubber, or combinations thereof, the modification being with a functional group having a hydrogen bond acceptor atom. Such functional group may be selected from a pyridine, a pyrrolidone, an ether, a ketone or an epoxide, the rubber composition having a Tg of between ?80° C. and ?110° C. The rubber composition may include an efficient plasticizing resin, which when included in a mixture consisting of the modified rubber component and 67 phr of the efficient plasticizing resin, causes a Tg of the mixture to be at least 14° C. higher than the Tg of the modified rubber component. The rubber composition may described as having the hydrogen bond acceptor atom located at least two covalent bond lengths or alternatively three covalent bond lengths from a backbone of the modified rubber component.

Abstract: A rubber composition based on at least one diene elastomer, a reinforcing filler and a 1,3-dipolar compound comprising an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom exhibiting a connection to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. Such a rubber composition exhibits improved properties at break and an improved processing, as well as good hysteresis properties.

Abstract: A 1,3-dipolar compound bearing at least a phosphorus-containing group and a dipole containing a nitrogen atom is provided. A method for grafting the 1,3-dipolar compound on an unsaturated polymer, a diene polymer comprising, along the polymer chain, at least one pendant phosphorus-containing group, and a rubber composition based on a diene elastomer and the 1,3-dipolar compound optionally pre-grafted on the diene elastomer are also provided. The 1,3-dipolar compound allows access to rubber compositions reinforced with an inorganic filler that have a compromise of improved properties, namely hysteresis, stiffness in the cured state and reinforcement.

Abstract: The invention relates to an alkoxysilane polysulfide, of formula (I): (R3O)3-n(R1)nSi—CH2—(R2)CH—Z—Sx—Z—HC(R2)—CH2—Si(R1)n(OR3)3-n??(I), in which: R1, which are identical or different, each represent a monovalent hydrocarbon group having from 1 to 18 carbon atoms; R2, which are identical or different, each represent a monovalent hydrocarbon group having from 1 to 4 carbon atoms; R3, which are identical or different, each represent a monovalent hydrocarbon group having from 1 to 12 carbon atoms, preferably from 1 to 6 carbon atoms; Z, which are identical or different, each represent a divalent hydrocarbon bonding group comprising from 1 to 16 carbon atoms; x is an integral or fractional number greater than or equal to 2; and n is an integer equal to 0, 1 or 2.

Abstract: Rubber compositions having a modified rubber component selected from a modified polybutadiene rubber, a modified styrene-butadiene rubber, or combinations thereof, the modification being with a functional group having a hydrogen bond acceptor atom. Such functional group may be selected from a pyridine, a pyrrolidone, an ether, a ketone or an epoxide, the rubber composition having a Tg of between ?80° C. and ?110° C. The rubber composition may include an efficient plasticizing resin, which when included in a mixture consisting of the modified rubber component and 67 phr of the efficient plasticizing resin, causes a Tg of the mixture to be at least 14° C. higher than the Tg of the modified rubber component. The rubber composition may described as having the hydrogen bond acceptor atom located at least two covalent bond lengths or alternatively three covalent bond lengths from a backbone of the modified rubber component.

Abstract: A method for grafting a carboxylic acid ester function onto an unsaturated polymer, which comprises the reaction of a 1,3-dipolar compound with at least one unsaturation of the unsaturated polymer is provided. The 1,3-dipolar compound comprises a group Q and a group B connected to one another by a group A in which: Q comprises a dipole containing at least and preferably one nitrogen atom, B represents a carboxylic acid ester function, A, which is preferably divalent, is an atom or a group of atoms connecting Q to B.

Abstract: An elastomeric composition is based on at least a diene elastomer, an inorganic filler as reinforcing filler and a monohydroxysilane polysulfide as coupling agent of formula (I): (HO)(R1)2Si—CH2—(R2)CH—Z—Sx—Z—HC(R2)—CH2—Si(R1)2(OH) (I), in which: each R1 represents a monovalent hydrocarbon group having from 1 to 18 carbon atoms and can be the same or different from one another; each R2 represents a monovalent hydrocarbon group having from 1 to 4 carbon atoms and can be the same or different from one another; each Z represents a divalent hydrocarbon bonding group comprising from 1 to 16 carbon atoms can be the same or different from one another; and x is an integral or fractional number greater than or equal to 2.

Abstract: In a 1,3-dipolar compound of formula Q-A-B, Q comprises a dipole containing at least and preferably one nitrogen atom, A, which is preferably divalent, is an atom or a group of atoms connecting Q to B, and B comprises an imidazole ring. An unsaturated polymer modified by grafting the 1,3-dipolar compound is also disclosed.