Amorphous silica particles comprising boron

Details Amorphous silica particles comprising boron Amorphous silica particles comprising boron

C - Chemistry, Metallurgy

01

B

C01B 33/18 (2006.01) C01B 33/193 (2006.01) C08K 3/36 (2006.01) C08K 3/38 (2006.01) C09C 1/30 (2006.01)

Patent

CA 2401841

The invention pertains to an amorphous silica particle comprising 0.1 to 105 ppm boron atoms, and optionally 0.05 to 15 wt.% aluminum atoms wherein the boron and aluminum atoms are covalently bonded to the oxygen atoms of the silica network. The amorphous silica particles are used as a reinforcing filler for rubber articles, particularly for tires, more particularly for tire treads.

L'invention concerne des particules de silice amorphe contenant 0,1 à 10?5¿ ppm d'atomes de bore et, éventuellement, 0,05 à 15 % en poids d'atomes d'aluminium, particules dans lesquelles les atomes de bore et d'aluminium sont liés par covalence avec les atomes d'oxygène du réseau siliceux. Ces particules de silice amorphe sont utilisées comme renforts pour des articles en caoutchouc tels que des pneus et, en particulier, pour des bandes de roulement.

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