Resin compositions and use of the same

A method for producing a resin composition comprising the steps of:

• (A) preparing an ethylene/α-olefin random copolymer by randomly copolymerizing ethylene and an α-olefin having 3 to 20 carbon atoms by a solution polymerization process in the presence of a catalyst comprising a compound represented by the following formula (I):
• wherein M is a transition metal of Group IVB of the periodic table,
• R1 is a hydrocarbon group having 1 to 6 carbon atoms;
• R2, R4, R5 and R6 may be identical with or different from each other and are each hydrogen, a halogen atom or a hydrocarbon group of 1 to 6 carbon atoms,
• R3 is an aryl group of 6 to 16 carbon atoms which may be substituted with a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or an organosilyl group,
• X1 and X2 are each independently hydrogen, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms, a halogenated hydrocarbon group of 1 to 20 carbon atoms, an oxygen-containing group or a sulfur-containing group, and
• Y is a divalent hydrocarbon group of 1 to 20 carbon atoms, a divalent halogenated hydrocarbon group of 1 to 20 carbon atoms, a divalent silicon-containing group, a divalent germanium-containing group, a divalent tin-containing group, —O—, —CO—, —S—, —SO—, —SO2, NR7—, —P(R7)—, —P(O)(R7)—, —BR7— or —A1R7— wherein R7 is hydrogen, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or a halogenated hydrocarbon group of 1 to 20 carbon atoms,
• wherein the ethylene/α-olefin random copolymer has:
• (a) a density of not more than 0.900 g/cm3;
• (b) an intrinsic viscosity (η), as measured in decalin at 135° C., of 0.3 to 3.0 dl/g;
• (c) a crystallinity, as measured by X-ray diffractometry, of less than 40%;
• (d) a molecular weight distribution (Mw/Mn), as measured by GPC, of not more than 3.0;
• and
• (e) a B value, as determined by 13C-NMR spectrum and the following equation, of 1.0 to 1.4,
• B value=(POE)/(2·(PE)·(PO))
• wherein (PE) and (PO) are respectively a molar fraction of the units derived from ethylene and a molar fraction of the units derived from the α-olefin in the ethylene/α-olefin random copolymer, and (POE) is a proportion of the number of the α-olefin/ethylene sequences to the number of all the dyad sequences;
• (B) mixing said ethylene/α-olefin random copolymer in an amount of 50 to 5000 parts by weight,
• with an ethylene/α-olefin copolymer resin in an amount of 100 parts by weight,
• wherein said ethylene/α-olefin copolymer resin has:
• (a) a melt flow rate (MFR), measured at 190° C. and a load of 2.16 kg, of 7 to 50 g/10 min;
• and
• (b) a density of 0.901 to 0.925 g/cm3;
• and
• (C) molding said resin mixture.