| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new polymer alloy and a composition obtained by compounding the polymer alloy with an unvulcanized rubber, and further to provide a tire part by using the composition. SOLUTION: This polymer alloy comprises (a) a polyester resin having 5-80 acid value, (b) an epoxidized dienic block copolymer and (c) an unvulcanized rubber. The composition is obtained by mixing the polymer alloy with (d) one or more kinds of unvulcanized rubbers derived from a dienic monomer and selected from synthetic rubbers and natural rubbers so that the total of the polyester resin (a) and the epoxidized dienic block copolymer (b) may be 2-25 pts.wt. based on 100 pts.wt. whole unvulcanized rubber in the composition. The tire parts are a tread base, a tread cap, a carcass ply, a cushion, a belt ply, a shoulder wedge, a bead area, an apex or a Shaffer comprising the polymer alloy or the composition. |
