Patent ID: 6559219
Filing Date: 2003-05-06
Classification: C08L

Abstract:
A rubber composition comprising [1] a crosslinked rubber particle component whose toluene-insolubles is 50% by weight or more and whose number-average particle size is 3 to 1000 nm and [2] a non-crosslinked rubber component whose toluene-insolubles is less than 20% by weight,wherein said crosslinked rubber particle component is at least one selected from (1) a polymer comprising a conjugated diene unit and a monomer unit having at least two polymerizable unsaturated groups as repeating units, (2) a polymer comprising a conjugated diene unit, an &agr;,&bgr;-unsaturated nitrile unit and a monomer unit having at least two polymerizable unsaturated groups as repeating units and (3) a polymer comprising a conjugated diene unit, an acrylate unit and a monomer unit having at least two polymerizable unsaturated groups as repeating units, and, wherein said non-crosslinked rubber component is at least one selected from (a) a polymer comprising as a repeating unit only a conjugated diene unit, (b) a polymer comprising a conjugated diene unit and an aromatic vinyl unit as repeating units, (c) a polymer comprising a conjugated diene unit and an &agr;,&bgr;-unsaturated nitrile unit as repeating units, (d) an acrylic rubber and (e) a polymer comprising an ethylene unit and an a-olefin unit having 3 to 12 carbon atoms as repeating units.