| 摘要 |
Resinous crosslinking agents with which rubbers can be crosslinked at a higher rate than with conventional resinous crosslinking agents without using a crosslinking accelerator causative of corrosion. One of the resinous crosslinking agents comprises a mixture of a resol type phenol/formaldehyde co-condensation resin and a novolak type phenolic/formaldehyde co-condensation resin. The other resinous crosslinking agent comprises a resol resin obtained through the co-condensation of a p-alkylphenol compound, a phenol compound not having a substituent in the para-position, and formaldehyde.
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