Patent ID: 8076404

Claim:
A rubber composition containing a filler and comprising: (i) at least one rubber containing olefinic unsaturation and (ii) functionalized nano transition metal oxide and/or sulfide particles, wherein the functionalized nano transition metal oxide and/or sulfide particles are end-capped nano transition metal oxide and/or sulfide particles with a capping agent selected from the group consisting of 2-mercaptobenzothiazole, bis-benzothiazole-2,2′-disulfide, N-oxydiethylene-2-benzothiazole-sulfenamide, N-oxydiethylenethiocarbamoyl-N-oxydiethylene sulfenamide, tetramethyl thiuram disulfide, tetramethyl thiuram monosulfide, tetraethyl thiuram disulfide, tetraethyl thiuram monosulfide, tetrabenzyl thiuram disulfide, tetrabenzyl thiuram monosulfide, tetrabutyl thiuram disulfide, tetrabutyl thiuram monosulfide, tetraisopropyl thiuram disulfide, tetraisopropyl thiuram monosulfide, N-cyclohexylthiophthalimide, N-cyclohexyl-2-benzothiazole sulfenamide, N-tert-butyl-2-benzothiazole sulfenamide, 4-morpholinyl-2-benzothiazole disulfide, dipentamethylene thiuram disulfide, dipentamethylene thiuram monosulfide, dipentamethylene thiuram tetrasulfide, 4,4′-dithiomorpholine, 2-mercaptotoluimidazole, ethylene thiourea, trimethylthiourea, 1,3-diethylethiourea, and 1,3-dibutylthiourea.