HYDROGENATED PETROLEUM RESIN, RUBBER ADDITIVE, UNCROSSLINKED RUBBER COMPOSITION, CROSSLINKED RUBBER, AND TIRE
A hydrogenated petroleum resin that is a hydrogenation product of a C9 petroleum resin, in which a ratio (M 2 /M 1 ) of a total number (M 2 ) of hydrogen atoms bound to an aromatic ring in the hydrogenated petroleum resin to a total number (M 1 ) of hydrogen atoms in the hydrogenated petroleum resin is 0.15 to 0.45.
1 . A hydrogenated petroleum resin that is a hydrogenation product of a C9 petroleum resin, wherein
a ratio (M 2 /M 1 ) of a total number (M 2 ) of hydrogen atoms bound to an aromatic ring in the hydrogenated petroleum resin to a total number (M 1 ) of hydrogen atoms in the hydrogenated petroleum resin is 0.15 to 0.45.
2 . The hydrogenated petroleum resin according to claim 1 , wherein
the ratio (M 2 /M 1 ) is 0.2 to 0.4.
3 . The hydrogenated petroleum resin according to claim 1 , wherein
a softening point is 70 to 200° C.
4 . The hydrogenated petroleum resin according to claim 1 , wherein
an iodine value is 20 or less.
5 . A rubber additive containing the hydrogenated petroleum resin according to claim 1 .
6 . An uncrosslinked rubber composition containing a rubber component, the rubber additive according to claim 5 , and a crosslinking agent.
7 . A crosslinked rubber obtained by crosslinking the uncrosslinked rubber composition according to claim 6 .
8 . A tire containing the crosslinked rubber according to claim 7 in a tread portion.