Patent ID: 6340724
Filing Date: 2002-01-22
Classification: C01P,C07F,C08J,C08K,C09C

Abstract:
A finely divided rubber powder comprising:a) a filler which is solidly bonded to the rubber matrix wherein said filler is modified with organosilicon compounds of the formulas (I), (II) or (III): [R1nâˆ’(RO)3âˆ’nSiâ€”(Alk)mâ€”(Ar)p]q[B1]â€ƒâ€ƒ(I), R1n(RO)3âˆ’nSiâ€”(Alk)â€ƒâ€ƒ(II), R1n(RO)3âˆ’nSiâ€”(Alkenyl)â€ƒâ€ƒ(III); and b) a first zone and a second zone wherein said second zone surrounds and is intimately bonded with said first zone, and wherein said first zone and said second zone have a different filler versus rubber matrix content, â€ƒin which q: means 1 or 2 B1: means â€”SCN, â€”SH, â€”Cl, â€”NH2 (if q=1) or â€”Sxâ€”(if q=2) R and R1: mean an alkyl group having 1 to 4 carbon atoms branched or unbranched, or a phenyl residue, wherein all residues R and R1 may each have the same or a different meaning, n: means 0, 1 or 2, Alk: means a divalent linear or branched hydrocarbon residue having 1 to 6 carbon atoms, m: means 0 or 1 Ar: means an arylene residue having 6 to 12 C atoms p: means 0 or 1, provided that p and n do not simultaneously mean 0, x: means a number from 2 to 8, Alkyl: means a monovalent linear or branched saturated hydrocarbon residue having 1 to 20 carbon atoms, Alkenyl: means a monovalent linear or branched unsaturated hydrocarbon residue having 1 to 20 carbon atoms.