Method for producing stable, colorless butadiene rubbers

Details Method for producing stable, colorless butadiene rubbers Method for producing stable, colorless butadiene rubbers

C - Chemistry, Metallurgy

08

C

C08C 2/00 (2006.01)

Patent

CA 2411776

Stable, colorless diene rubbers, stabilized with phenolic compounds, are produced by adding one or more phenolic compounds (stabilizers) to the polymer mixture after the polymerization of the monomers used in a subsequent process step and adjusting the pH value and the oxygen content so that the polymer mixture has a pH value of 4 to 11 and the oxygen content is 0 to 0.3 in relation to the proportion of water in the polymer mixture.

La présente invention concerne des caoutchoucs au diène stables et incolores, rendus stables grâce à des composés phénoliques, pouvant être préparés, suite à la polymérisation des monomères impliqués, grâce à la formation d'un mélange polymère avec un ou plusieurs composés phénoliques (agents de stabilisation) durant une phase ultérieure du procédé, puis grâce au réglage du pH et de la teneur en oxygène, de sorte que le mélange polymère a un pH compris entre 4 et 11, et que la teneur en oxygène vaut de 0 à 0,3 ppm, vis-à-vis de la proportion d'eau du mélange polymère.

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