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AssigneeMichelin Recherche et Technique S. A.
InventorsArnaud Lapra, Sylvie Gandon-Pain, Franck Varagniat
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Rubber composition based on at least one diene elastomer, a polymeric filler as reinforcing filler and a coupling agent for bonding between the polymeric filler and the elastomer. The polymeric filler includes nanoparticles of a polyvinylaromatic (PVAr) carrying a functional group denoted by Z of formula a ≡Si—X, X representing a hydroxyl or hydrolyzable group. The PVAr is especially a copolymer of styrene, ethylvinylbenzene, divinylbenzene and trimethoxysilylpropylacrylate or trimethoxysilylpropylmethacrylate, being in the form of nanobeads, the diameter of which is between 10 and 100 nm. Also described is a method of obtaining such a composition, and use of such a rubber composition for the manufacture of rubber articles, in particular tires or rubber semi-finished products intended for these tires, as well as a masterbatch including at least one diene elastomer and such a polymeric filler, and a method of obtaining such a masterbatch.
A rubber composition based on at least a diene elastomer, a polymeric filler and a coupling agent for bonding between the polymeric filler and the elastomer, wherein said polymeric filler comprises nanoparticles of a polyvinylaromatic carrying a functional group denoted by Z of formula ≡Si —X, X representing a hydroxyl or hydrolyzable group.
A process for obtaining a rubber composition, in which at least one polymeric filler and a coupling agent for bonding between the polymeric filler and the elastomer are incorporated into at least one diene elastomer, and in that these are all thermomechanically mixed, in one or more steps, until a maximum temperature between 110° C. and 190° C. is reached, wherein said polymeric filler comprises nanoparticles of a polyvinylaromatic functionalized with ≡Si—X, X representing a hydroxyl or hydrolyzable group.
A masterbatch based on at least one diene elastomer and a polymeric filler, said polymeric filler comprises nanoparticles of a polyvinylaromatic carrying a functional group denoted by Z of formula ≡Si—X, X representing a hydroxyl or hydrolyzable group.
A process for obtaining a masterbatch comprising at least a diene elastomer and a polymeric filler, comprising:
Dependencies are inferred from the claim text.