| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel co-condensate for an adhesive used in a filed of rubber products reinforced with reinforcement materials, which does not contain p-tert-octylphenol and p-nonylphenol, the use of which is possible to be limited by legislation, has the same level of softening point as those of the heretofore known co-condensates and therefore disperses efficiently in rubber when kneading, and further contains p-tert-butylphenol which can be available inexpensively, and to provide a resin composition and a method for producing these.SOLUTION: It was found that, by further adding o-phenylphenol as a constituent unit to a co-condensate containing p-tert-butylphenol and resorcin, a softening point of the co-condensate drops significantly, that a coumarone resin can be used specifically as a softener for the co-condensate, and that, by optimizing reaction conditions, a reaction solvent having a boiling point of 190°C or less in the co-condensate and the resin composition can be reduced to 1 wt% or less. |
