Patent ID: 6245860
Filing Date: 2001-06-12
Classification: C08K

Abstract:
A rubber composition comprised of, based upon 100 parts by weight (phr) of elastomer, (A) 100 parts by weight of at least one diene-based elastomer, (B) about 30 to about 110 phr of reinforcing filler composed of (1) about 20 to about 80 phr of particles of hollow, irregularly shaped, shells of interconnecting domains of inorganic materials and fragments of such hollow shells, (2) and about 10 to about 80 phr of at least one of (i) rubber reinforcing carbon black (ii) modified rubber reinforcing carbon black, said modified rubber reinforcing carbon black containing at least one moiety selected from the group consisting of silanol, siloxane, titanium oxide, titanium hydroxide, zirconium oxide, zirconium hydroxide and aluminum hydroxide groups on the surface thereof, (iii) precipitated silica which contains silanol groups on the surface thereof and (iv) aluminosilicate which contains silanol and aluminum hydroxide groups on the surface thereof; wherein inorganic materials for said interconnecting domains are inorganic materials having reactive hydroxyl groups on their surface selected from the group consisting of silica, aluminosilicate, titanium oxide, alumina and silicon-magnesium oxide and (C) a coupling agent having a moiety reactive with said silica, said modified rubber reinforcing carbon black and said shell of inorganic material and another moiety interactive with said diene-based elastomer(s).