Patent ID: 6713562
Filing Date: 2004-03-30
Classification: C08J,C08L

Abstract:
A method for producing a resin composition comprising the steps of:(A) preparing an ethylene/&agr;-olefin random copolymer by randomly copolymerizing ethylene and an &agr;-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, â€”Oâ€”, â€”COâ€”, â€”Sâ€”, â€”SOâ€”, â€”SO2, NR7â€”, â€”P(R7)â€”, â€”P(O)(R7)â€”, â€”BR7â€” or â€”A1R7â€” 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/&agr;-olefin random copolymer has: (a) a density of not more than 0.900 g/cm3; (b) an intrinsic viscosity (&eegr;), as measured in decalin at 135Â° 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)/(2Â·(PE)Â·(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 &agr;-olefin in the ethylene/&agr;-olefin random copolymer, and (POE) is a proportion of the number of the &agr;-olefin/ethylene sequences to the number of all the dyad sequences;(B) mixing said ethylene/&agr;-olefin random copolymer in an amount of 50 to 5000 parts by weight, with an ethylene/&agr;-olefin copolymer resin in an amount of 100 parts by weight,wherein said ethylene/&agr;-olefin copolymer resin has: (a) a melt flow rate (MFR), measured at 190Â° 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.