Rubber composition and tire using the same

摘要

The invention relates to a rubber composition having better workability and fracture resistance than the prior art, and more specifically, to a rubber composition containing a polymer (B) obtained from an emulsion-polymerized polymer latex (A) having a number average molecular weight in the range of 1,000-130,000.

主权项

1. A rubber composition comprising a polymer (B) obtained from an emulsion-polymerized polymer latex (A) with a number average molecular weight in the range of 1,000 to 130,000 and a polymer (D) obtained from an emulsion-polymerized polymer latex (C) with a number average molecular weight exceeding 130,000,
wherein the polymer (B) obtained from the emulsion-polymerized polymer latex (A) has a vinyl bond content in a diene compound portion of 10 mass % to 30 mass %, the rubber composition further comprising a polymer (E) obtained by mixing the emulsion-polymerized polymer latex (A) with the emulsion-polymerized polymer latex (C) and then coagulating and drying the mixture, wherein the polymer (E) has a molecular weight distribution (Mw/Mn) within the range of 3.0 to 7.0.