Patent ID: 7193013

Claim:
A polyolefin-based resin composition, comprising (A) a polyolefin I produced from at least one monomer selected from the group consisting of a C 2 –C 20 α-olefin, a cyclic olefin, and an aromatic vinyl compound; (B) a polyolefin II produced from at least one monomer selected from the group consisting of a C 2 –C 20 α-olefin, a cyclic olefin, and an aromatic vinyl compound; which differs in at least one of kind of constituting monomer unit, stereoregularity, copolymerization composition, copolymerization type and kinds of different bonds, from said polyolefin I; and (C) a graft copolymer produced by bonding said polyolefins I and II, present in said polyolefin-based resin composition, to each other through a polyene, which has a xylene-insoluble content at 140° C. of 0 to 2.5% by weight, and a polyene-derived residual carbon-to-carbon double bond content of 0 to 0.15 mol %, wherein said component (A) and said component (B) are present at a weight ratio of 1:99 to 99:1, and further said component (C) is present in an amount of 0.01 to 30% by weight based on the total weight of said components (A) and (B), and wherein an intrinsic viscosity [η] of the composition is in the range of 0.1 to 10 deciliter/g as measured in decalin at 135° C., and wherein the polyene is a compound selected from the group consisting of α, ω-polyenes represented by the following formula II; CH 2 ═CH-QCH═CH 2 (II) wherein Q is a single bond or C 0 to C 20 alkylene; styrene-type polyenes represented by the following formula III: wherein R 13 is a hydrogen atom, a halogen atom or a substituent group containing carbon and/or silicon; R 14 is an unsaturated substituent group containing an α-olefin residue; and a is an integer of 1 to 4 with the proviso that when a is 2 or larger, the plural R 13 groups may be the same or different; cyclic polyenes represented by the following formula IV: wherein R 15 to R 24 are independently a hydrogen atom, a halogen atom or a C 1 to C 20 hydrocarbon group with the proviso that R 15 to R 24 may be the same or different; R is C 2 to C 20 alkenyl; and n is an integer of 0 or larger; cyclic polyenes represented by the following formula V: wherein R 15 to R 24 and n are the same as defined above; cyclic polyenes represented by the following formula VI: wherein subscript b is 0, 1 or 2; cyclic polyenes represented by the following formula VII: wherein c is an integer of 1 or 2; and d is an integer of 0 to 11; cyclic polyenes represented by the following formula VIII: wherein e is an integer of 0 to 6; styrene/α-olefin-type polyenes represented by the following formula IX: wherein R 25 is a divalent C 1 to C 20 hydrocarbon group; R 26 is a halogen atom or a C 1 to C 8 hydrocarbon group; R 27 and R 28 are independently a hydrogen atom, a halogen atom or a C 1 to C 8 hydrocarbon group; and f is an integer of 0 to 4; and monoalicyclic dienes.