Addition of salts to improve the interaction of silica with...

C - Chemistry – Metallurgy – 08 – K

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C08K 9/02 (2006.01) B60C 1/00 (2006.01) C08K 3/36 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2242383

Incorporation of neutral water soluble inorganic salts into a precipitated silica improves the filler dispersion in a compounded rubber, reduces rolling resistance (hysteresis), and improves processability. These properties are achieved without loss of the expected reinforcement effect due to the substitution of inorganic salt for SiO2 in the silica. The properties are seen when a variety of silanes and processing aids are added to the silica.

L'incorporation de sels inorganiques neutres, solubles dans l'eau, à une silice précipitée améliore la dispersion de la matière de charge dans un caoutchouc composite, réduit la résistance au roulement (hystérèse) et améliore l'aptitude au traitement. On obtient ces propriétés sans perte de l'effet de renforcement attendu, grâce à la substitution de SiO2 par des sels inorganiques dans la silice. Ces propriétés sont observées lorsqu'on ajoute une variété de silanes et d'additifs à la silice.

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