The present invention is directed to a rubber composition comprising: a functionalized elastomer comprising: a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and a functional group bonded to the backbone chain, the functional group comprising a multidentate ligand capable of complexing with a metal ion; and a metal ion. The invention is further directed to a pneumatic tire comprising the rubber composition.

Rubber composition and pneumatic tire

Plants and seeds of hybrid corn variety CH921588

Plants and seeds of hybrid corn variety ch325995

Plants and seeds of hybrid corn variety ch225896

The invention discloses a sulfur-containing silane coupling agent and a preparation method thereof. The structural general formula of the sulfur-containing silane coupling agent is as follows (see the specification), wherein n=2-10, Z is perssad (R1O) m (G) 3-mSi, m is 1 or 2, R1 is methyl or ethyl, G is (R2) (O (CR' R'') x) yO, x=2-10, y=1-20, R2 is alkyl, R' is hydrogen, alkyl or phenyl, and R'' is hydrogen or alkyl. The preparation method is simple and reliable, and the prepared sulfur-containing silane coupling agent can be widely used in rubber chemicals to effectively improve the rubber performance.

Sulfur-containing silane coupling agent and preparation method thereof

The invention relates to a rubber composition for tyres, comprising at least a diene elastomer, an inorganic reinforcing filler, and a coupling agent linking the inorganic filler and the diene elastomer. The composition is characterised in that the coupling agent is an azo-silane compound having formula (I) (G1)3-a(G2)aSi-Z-NH-C(0)-N=N-C(0)-NH-Z-Si(G1)3-a(G2)a, wherein: - G1, which may be identical or different, each represent a monovalent hydrocarbon group selected from among optionally substituted, linear or branched alkyls having between 1 and 18 carbon atoms, cycloalkyls or aryls, optionally substituted, having between 5 and 18 carbon atoms; - G2, which may be identical or different, each represent a hydroxyl group or a monovalent group taking the form (G3)n-OG1, in which G3 is a divalent linking group comprising between 1 and 18 carbon atoms and containing one or more heteroatoms selected from among O, S, Si and N, and n is a number greater than or equal to 0 and less than or equal to 18; - Z represents a divalent linking group comprising between 1 and 18 carbon atoms; and - a is equal to 1, 2 or 3.

Rubber tyre composition comprising an azo-silane coupling agent

The invention therefore relates to a tyre comprising a rubber composition based on at least one diene elastomer, a reinforcing filler predominantly comprising silica, a crosslinking system, said composition being essentially free of guanidine derivative and also comprising a primary amine of formula (I): R-NH2 (I) in which R represents a linear or branched hydrocarbon-based group comprising from 8 to 24 carbon atoms.

Tyre comprising a composition essentially free of guanidine derivative and comprising a primary amine

The invention therefore relates to a tyre comprising a rubber composition based on at least one diene elastomer, a reinforcing filler predominantly comprising silica, a crosslinking system, said composition being essentially free of guanidine derivative and also comprising an alkali metal hydroxide or alkaline-earth metal hydroxide.

Tyre comprising a composition essentially free of guanidine derivative and comprising an alkali metal hydroxide or alkaline-earth metal hydroxide

A tire comprises a rubber composition based on at least one diene elastomer, a reinforcing filler predominantly comprising silica, a crosslinking system, and an amino ether alcohol of formula (I): R 1 —O(—R 2 —O) n —R 3 —NH 2 (I), in which R 1 represents a linear or branched alkyl group comprising from 1 to 18 carbon atoms, R 2 and R 3 independently represent a linear or branched alkylene group comprising from 1 to 18 carbon atoms, and n represents an integer from 0 to 20, it being understood that the amino ether alcohol bears one or more hydroxyl groups on at least one carbon-based chain chosen from R 1 , R 2 and R 3 . The rubber composition is essentially devoid of guanidine derivative.

Tire comprising a composition essentially devoid of guanidine derivative and comprising an amino ether alcohol

L'invention concerne donc un pneumatique comprenant une composition de caoutchouc a base d'au moins un elastomere dienique, une charge renforcante comprenant majoritairement de la silice, un systeme de reticulation, ladite composition etant essentiellement depourvue de derive guanidique et comprenant en outre une amine primaire de formule (I) : R-NH 2 (I) dans laquelle R represente un groupement hydrocarbone lineaire ou ramifie comprenant de 8 a 24 atomes de carbone.

Christelle Darnaud

Papers

Rubber tyre composition comprising an azo-silane coupling agent

Tyre comprising a composition essentially free of guanidine derivative and comprising a primary amine

Tyre comprising a composition essentially free of guanidine derivative and comprising an alkali metal hydroxide or alkaline-earth metal hydroxide

Tire comprising a composition essentially devoid of guanidine derivative and comprising an amino ether alcohol

Pneumatique comprenant une composition essentiellement depourvue de derive guanidique et comprenant un aminoetheralcool