| 摘要 |
PURPOSE:The titled composition having excellent paintability and stiffness, consisting of a specified crystalline thylene-propylene block copolymer, an ethylene- propylene copolymer rubber, an ethylene-propylene-diene terpolymer rubber, and an inorganic filler. CONSTITUTION:90-60pts.wt. crystalline ethylene-propylene copolymer (A), containing 6-30wt% ethylene, and polypropylene which gives 75wt% or more insolubles in boiling n-heptane, an intrinsic viscosity of tetraline solution at 135 deg.C of 1.2-2.0, and an MFT of 8 or higher, 5-35pts.wt. ethylene-propylene copolymer rubber (B), having 20-70wt% propylene, and a Mooney viscosity at 100 deg.C of 15-100, 35pts.wt. or less entylene-propylene-diene terpolymer rubber (C), having 20-50wt% propylene, a Mooney viscosity at 100 deg.C of 20-110, and the diene being dicyclopentadiene, ethylidene-norbonene, or 1,4-hexadiene, and an inorganic filler (D) of a particle diameter of 6mu or less in an amount of 2-25pts. wt. per 100pts.wt. (A)+(B)+(C), are compounded. |
