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

A rubber composition comprising:

• at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two —O—H groups in the meta position relative to one another, the two positions ortho to at least one of the —O—H groups being unsubstituted;
• and
• at least one aldehyde of formula W:
• wherein each Ar1 and Ar2 group represents, independently of one another, an optionally substituted aromatic ring;
• and
• wherein SP is a connecting group that connects at least the Ar1 and Ar2 groups to one another, SP separating the Ar1 and Ar2 groups by at least 2 covalent bonds.

A method for manufacturing a rubber composition in the uncured state comprising the step of mixing:

• at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two —O—H groups in the meta position relative to one another, the two positions ortho to at least one of the —O—H groups being unsubstituted;
• and
• at least one aldehyde of formula W:
• wherein each Ar1 and Ar2 group represents, independently of one another, an optionally substituted aromatic ring;
• and
• wherein SP is a connecting group that connects at least the Ar1 and Ar2 groups to one another, SP separating the Ar1 and Ar2 groups by at least 2 covalent bonds.

A method for manufacturing a rubber composition in the cured state comprising the steps of:

• manufacturing a rubber composition in the uncured state comprising a step of mixing:
• at least one aromatic polyphenol comprising at least one aromatic ring bearing at least two —O—H groups in the meta position relative to one another, the two positions ortho to at least one of the —O—H groups being unsubstituted;
• and
• at least one aldehyde of formula W:
• wherein each Ar1 and Ar2 group represents, independently of one another, an optionally substituted aromatic ring;
• and
• wherein SP is a connecting group that connects at least the Ar1 and Ar2 groups to one another, SP separating the Ar1 and Ar2 groups by at least 2 covalent bonds;
• then shaping the rubber composition in the uncured state;
• and
• then vulcanizing the rubber composition during which a phenol-aldehyde resin based on the aromatic polyphenol and on the aldehyde is crosslinked.