| 摘要 |
PROBLEM TO BE SOLVED: To provide a phenolic resin for a rubber composition additive capable of enhancing elasticity of the rubber composition while preventing the rubber composition from deterioration in breakdown resistance. SOLUTION: This phenolic resin for a rubber composition additive is expressed by formula(1) or the like. In the formula, R<SP>0</SP>s are each independently at least a kind of functional group selected from the group consisting of hydrogen, a 1-10C alkyl group, 1-4C alkoxy group, phenyl group and methylol group; R<SP>1</SP>and R<SP>2</SP>are each a crosslinking group, provided that at least a part of R<SP>1</SP>and R<SP>2</SP>is at least a kind of crosslinking group selected from the group consisting of an arylene group, 2-10C alkylene group, aralkylene group, cycloalkenylene group and cycloalkadienylene group; p is an integer of 0 or 1, m is an integer of 1-3, and n is a number of 0-10. COPYRIGHT: (C)2006,JPO&NCIPI
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