Process for the partial hydrogenation of random vinyl arene...

Details Process for the partial hydrogenation of random vinyl arene... Process for the partial hydrogenation of random vinyl arene...

C - Chemistry, Metallurgy

08

C

C08C 19/02 (2006.01) C08F 8/04 (2006.01)

Patent

CA 2690917

Process for the partial hydrogenation of random vinyl arene - conjugated diene copolymers in the presence of 2-methoxyethyl tetrahydrofuran as randomizing agent, comprising: reacting the random vinyl arene - conjugated diene copolymer, dissolved in a hydrocarbon solvent, with hydrogen, in the presence of a titanium complex and an alkylating agent, until the desired hydrogenation degree is obtained the above process being characterized in that the alkylating agent is selected from compounds having the general formula MgR1R2

L'invention porte sur un procédé d'hydrogénation partielle de copolymères aléatoires vinylarène-diène conjugué en présence de 2-méthoxyéthyl tétrahydrofurane en tant qu'agent de transformation aléatoire. Ce procédé consiste à faire réagir le copolymère aléatoire vinyl arène-diène conjugué, dissous dans un solvant hydrocarboné avec de l'hydrogène, en présence d'un complexe de titane et d'un agent alkylant, jusqu'à ce que le degré d'hydrogénation désiré soit obtenu. Le procédé est caractérisé en ce que l'agent alkylant est choisi parmi des composés de formule générale MgR1R2.

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