The invention relates to a process for treating a natural rubber, comprising the following steps: - adding one or more stabilizers to the natural rubber, said natural rubber consisting of at least 80% by weight of natural rubber from cup lump and 0 to 20% by weight of natural rubber from latex, relative to the total weight of natural rubber, said stabilizer(s) being chosen from dimedone or being chosen from weak acid salts of compounds of formula XNH2 and strong acid salts of compounds of formula XNH2 neutralized with a strong base, where X is a group chosen from hydroxyl and hydroxyl (C1-C4 alkyl) groups, and said stabilizer(s) being present respectively in an amount varying from 2.4 mmol to 24 mmol equivalent of dimedone or equivalent of XNH2 per kilogram of natural rubber, then - subjecting the natural rubber to which the stabilizer(s) has (have) been added to mechanical working at a temperature of at least 100°C.
PROCEDE DE PREPARATION D'UN CAOUTCHOUC NATUREL STABILISE.
2018-01-05
Patent
Electronic Resource
French
IPC: | C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / B29B PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED , Vorbereiten oder Vorbehandeln der zu verformenden Masse / B60C VEHICLE TYRES , Fahrzeugreifen / 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 |
PROCÉDÉ DE PRÉPARATION D'UN CAOUTCHOUC NATUREL STABILISÉ
European Patent Office | 2017
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