| abstract |
(57) [PROBLEMS] To provide a structure derived from a fluorine-based compound having a fluoroalkyl group at both ends and having a functional group bonded to an intermediate chain, reliably and efficiently in a polymer main chain of a rubber substrate. It is possible to provide a method for modifying the surface of a rubber, which can be bonded to the surface of the surface and can stably develop the surface modification effect of the fluorine-based compound. A step of causing a fluorine-based compound represented by the following formula (1) and a silane coupling agent to be present in the vicinity of the surface of an uncrosslinked rubber substrate, and a step of heat-treating the rubber substrate. Including. (Wherein R F is a group containing a fluoroalkyl group, R 1 is a functional group having reactivity with a hydrolyzable group, R 2 is a hydrogen atom or an alkyl group, R 3 is a hydrogen atom or monovalent) X is an integer of 1 to 100, and y is an integer of 0 to 100.) |