The invention relates to a tyre for a vehicle, in particular a winter tyre, in an unvulcanised state, the tread of which comprises a heat expandable rubber composition comprising at least one diene elastomer, such as natural rubber and/or a polybutadiene, more than 50 phr of a reinforcing filler, such as silica and/or carbon black, 5 to 25 phr of a sodium or potassium carbonate or hydrogencarbonate and 2 to 20 phr of an acid salt, the total (hydrogen)carbonate and acid salt content being higher than 10 phr, wherein the acid salt is: either an inorganic polyacid acid salt, the acid salt anion being selected from the group consisting of hydrogensulfates, hydrogensulfides, hydrogensulfites, hydrogenphosphates and dihydrogenphosphates; or an organic polyacid acid salt, the acid salt anion being a carboxylic diacid or triacid monocarboxylate or a carboxylic triacid dicarboxylate. The combined use of this carbonate and this acid salt at the recommended rates greatly enhances the grip of the tyre on melting ice.
PNEUMATIQUE POUR VÉHICULE DONT LA BANDE DE ROULEMENT COMPORTE UNE COMPOSITION DE CAOUTCHOUC THERMO-EXPANSIBLE
VEHICLE TYRE, THE TREAD OF WHICH COMPRISES A HEAT-EXPANDABLE RUBBER COMPOSITION
FAHRZEUGREIFEN MIT EINER LAUFFLÄCHE MIT EINER WÄRMEEXPANDIERBAREN KAUTSCHUKZUSAMMENSETZUNG
2016-10-19
Patent
Electronic Resource
French
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen / C08J Verarbeitung , WORKING-UP / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen |
European Patent Office | 2019
|European Patent Office | 2018
|European Patent Office | 2020
|European Patent Office | 2020
|European Patent Office | 2020
|