Compagnie Generale Des Etablissements Michelin

Odile Gavard-Lonchay

Anne-Lise Thuilliez

David Doisneau

Christophe Le Clerc

Cedric Loubat

Gilles Boutevin

Cédric Loubat

Julien Letessier

Quentin Crouzet

The invention relates to a rubber composition based on at least one functionalized elastomer comprising polar functional groups, a reinforcing filler and a specific phenolic compound.

Rubber composition based on at least one functionalized elastomer comprising polar functional groups and a specific phenolic compound

A rubber composition is based on at least one elastomer, a reinforcing filler, a crosslinking system and at least one polyphenolic compound, the polyphenolic compound comprising at least three aromatic rings, each bearing at least two vicinal hydroxyl groups, and a composite is based on the rubber composition and at least one reinforcing element comprising a metallic surface.

Rubber composition comprising a polyphenolic compound

A rubber composition is based on at least one elastomer comprising epoxide functions, a crosslinking system comprising a polycarboxylic acid and an imidazole and at least one phenolic compound, the aromatic nucleus of said phenolic compound being substituted with at least a carboxyl group, a hydrogenocarbonyl group, an amino group or an aminoalkyl radical.

Diacid-crosslinked rubber composition comprising a phenolic compound

A rubber composition is based on at least one elastomer and at least one phenolic compound, the aromatic nucleus of said phenolic compound being substituted with at least one substituent comprising an oxygen atom, the molar mass of said phenolic compound being at most equal to 1000 g/mol, and said composition being free of molecular sulfur or comprising less than 1 phr thereof.

Sulfur-free crosslinked composition comprising a phenolic compound

The rubber composition comprises at least one resin based: (A1) on at least one aromatic compound comprising at least one aromatic ring bearing at least two functional groups, one of these functional groups being a hydroxymethyl functional group and the other being an aldehyde functional group or a hydroxymethyl functional group; and (A2) on 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; and their mixtures.

High stiffness rubber composition

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 (&#x3b1;): where B represents CHO or CHOH, (&#x3b1;) and a reactant of formula (&#x3b2;) or 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.

High strength rubber composition

A rubber composition comprises at least one phenol-aldehyde resin based: on at least one derivative of an aromatic polyphenol comprising at least one aromatic ring bearing at least two &#x2014;O&#x2014;Z groups in the meta position relative to one another, the two positions ortho to at least one of the &#x2014;O&#x2014;Z groups being unsubstituted, Z being other than hydrogen, and on at least one aldehyde.

High-strength rubber composition comprising an aromatic polyphenol derivative

An aromatic polyphenol derivative which comprises at least one aromatic ring bearing at least two &#x2014;O&#x2014;Z groups in the meta position relative to one another, the two positions ortho to at least one of the &#x2014;O&#x2014;Z groups being unsubstituted, is used for the manufacture of a phenol-aldehyde resin for reinforcing a rubber composition. Each &#x2014;O&#x2014;Z group represents an &#x2014;O&#x2014;((C&#x2550;O)(R)) group with Rrepresenting a hydrocarbon-based radical or a substituted hydrocarbon-based radical.

Use of an esterified aromatic polyphenol derivative for the production of a phenol-aldehyde resin for reinforcement of a rubber composition

A rubber composition comprises at least one phenol-aldehyde resin based on: at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two &#x2014;O&#x2014;H groups in the meta position relative to one another, the two positions ortho to at least one of the &#x2014;O&#x2014;H groups being unsubstituted; and at least one aldehyde of formula W: wherein each Arand Argroup represents, independently of one another, an optionally substituted aromatic ring; and wherein SP is a connecting group that connects at least the Arand Argroups to one another, SP separating the Arand Argroups by at least 2 covalent bonds.

Rubber composition with a high level of fluidity based on an aromatic aldehyde and an aromatic polyphenol

A rubber composition comprises at least one phenol/aldehyde resin based on at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functions in the meta position relative to one another, the two positions ortho to at least one of the hydroxyl functions being unsubstituted, and at least one aldehyde of formula (A): in which X comprises N, S or O, and R represents &#x2014;H or &#x2014;CHO.

High-rigidity rubber composition

An aromatic polyphenol derivative comprising at least one aromatic ring bearing at least two &#x2014;O&#x2014;Z groups in the meta position relative to one another, the two positions ortho to at least one of the &#x2014;O&#x2014;Z groups being unsubstituted, is used for the manufacture of a phenol-aldehyde resin for reinforcing a rubber composition. Each &#x2014;O&#x2014;Z group represents an &#x2014;O&#x2014;Si(RRR) group with R, R, Rrepresenting, independently of one another, a hydrocarbon-based radical or a substituted hydrocarbon-based radical.

Use of a silylated aromatic polyphenol derivative for the production of a phenol-aldehyde resin for reinforcement of a rubber composition

A rubber composition comprises at least one phenol/aldehyde resin based on at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functions in the meta position relative to one another, the two positions ortho to at least one of the hydroxyl functions being unsubstituted, and at least one aromatic polyaldehyde selected from 1,3-benzenedicarboxaldehyde, 1,4-benzenedicarboxaldehyde and mixtures of these compounds.

A rubber composition comprises at least one phenol/aldehyde resin based on at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two hydroxyl functions in the meta position relative to one another, the two positions ortho to at least one of the hydroxyl functions being unsubstituted, and at least one aromatic polyaldehyde selected from 1,3-benzenedicarboxaldehyde, 1,4-benzenedicarboxaldehyde and mixtures of these compounds, the rubber composition having a nominal secant modulus at 10% elongation, measured according to standard ASTM D 412, 1998, of greater than or equal to 25 MPa.

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Clermont-Ferrand, France

Odile Gavard-Lonchay