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The resin composition of the invention is a composition which includes 100 parts by weight of a polyethylene resin (A) and 2 to 5,000 parts by weight of a linear ethylene/a-olefin random copolymer (B) which includes ethylene and an a-olefin of 6 to 20 carbon atoms, wherein the polyethylene resin (A)

The resin composition of the invention is a composition which includes 100 parts by weight of a polyethylene resin (A) and 2 to 5,000 parts by weight of a linear ethylene/a-olefin random copolymer (B) which includes ethylene and an a-olefin of 6 to 20 carbon atoms, wherein the polyethylene resin (A) has (a) MFR (ASTM D 1238, 190.degree. C., load of 2.16 kg) of 0.1 to 200 g/10 min and (b) a density of 0.901 to 0.970 g/cm3; and the copolymer (B) has (a) a density of 0.870 to 0.900 g/cm3, (b) an intrinsic viscosity (.eta.), as measured in decalin at 135.degree. C., of 0.3 to 3.0 dl/g, (c) a glass transition temperature (Tg) of not higher than -50.degree. C., (d) a crystallinity, as measured by X-ray diffractometry, of less than 40%, (e) a molecular weight distribution (Mw/Mn), as measured by GPC, of not more than 3.0, (f) a B value, as determined by the 13C-NMR spectrum and a specific equation, of 1.0 to 1.4, and (g) a ratio g.eta.* of more than 0.95 (g.eta.*=(.eta.)/(.eta.)blank/ (.eta.): intrinsic viscosity of this copolymer determined in the property (b), (.eta.)blank: intrinsic viscosity of a linear ethylene/propylene copolymer having the same weight-average molecular weight (measured by a light scattering method) as this copolymer and having an ethylene content of 70% by mol). This resin composition can provide molded products of excellent pliability and tensile properties.

대표청구항 ▼

1. A soft resin composition comprising:a polyethylene resin (A-.alpha.) in an amount of 100 parts by weight; and a linear ethylene/.alpha.-olefin random copolymer (B-.alpha.) comprising ethylene and an .alpha.-olefin of 6 to 20 carbon atoms, in an amount of 50 to 5000 parts by weight, (A) wherein th

1. A soft resin composition comprising:a polyethylene resin (A-.alpha.) in an amount of 100 parts by weight; and a linear ethylene/.alpha.-olefin random copolymer (B-.alpha.) comprising ethylene and an .alpha.-olefin of 6 to 20 carbon atoms, in an amount of 50 to 5000 parts by weight, (A) wherein the polyethylene resin (A-.alpha.) has: (a) an MFR (ASTM D 1238, 190.degree. C., a load of 2.16 kg) of 1 to 150 g/10 min; and (b) a density of 0.901 to 0.970 g/cm3, and (B) wherein the ethylene/.alpha.-olefin random copolymer (B-.alpha.) has: (a) a density of 0.870 to 0.900 g/cm3; (b) an intrinsic viscosity (.eta.), as measured in decalin at 135.degree. C., of 0.3 to 3.0 dl/g; (c) a glass transition temperature (Tg) of not higher than -50.degree. C.; (d) a crystallinity, as measured by X-ray diffractometry, of not more than 30%; (e) a molecular weight distribution (Mw/Mn), as measured by GPC, of not more than 3.0; (f) a B value, as determined by the 13C-NMR spectrum of 1.0 to 1.4; and (g) a ratio g.eta.* of the intrinsic viscosity (.eta.) of this copolymer determined in the property (b) to the intrinsic viscosity (.eta.)blank of a linear ethylene/propylene copolymer having the same weight-average molecular weight (measured by a light scattering method) as this copolymer and having an ethylene content of 70% by mol, (.eta.)/(.eta.)blank, of more than 0.95.