| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rubber composition which can suppress large decrease of tensile elongation, and can achieve high elasticity while securing processability. <P>SOLUTION: The rubber composition includes: 0.5-40 pts.mass of a thermoplastic polyester resin having at most 130°C of a glass transition point and at least 20.0 of an SP value based on 100 pts.mass of a low polarity diene-based rubber (natural rubber, polybutadiene rubber, styrene butadiene rubber or the like) having less than 17.2 of an SP value (MPa)<SP POS="POST">1/2</SP>; and 2-30 mass% of a high polarity diene based rubber (nitrile rubber, epoxidation natural rubber or the like) having at least 17.2 and less than 20.0 of an SP value and at least 50,000 of a number average molecular weight based on the thermoplastic polyester resin. <P>COPYRIGHT: (C)2012,JPO&INPIT |
