Patent ID: 6403719
Filing Date: 2002-06-11
Classification: C08L

Abstract:
A flexible resin composition comprising:(A) 100 parts by weight of a long-chain branched ethylene/&agr;-olefin random copolymer comprising ethylene and an &agr;-olefin of 3 to 20 carbon atoms, and (B) 2 to 200 parts by weight of a polypropylene resin; the ethylene/&agr;-olefin random copolymer (A) having: (i) a density of not more than 0.900 g/cm3, (ii) an intrinsic viscosity (&eegr;) as measured in decalin at 135Â° C. in the range of 0.3 to 3.0 dl/g, (iii) a glass transition temperature (Tg) of not higher than âˆ’50Â° C., (iv) a crystallinity as measured by X-ray diffractometry of less than 40%, (v) a molecular weight distribution (Mw/Mn) as determined by GPC of not more than 3.0, (vi) a B value as determined by the 13C-NMR spectrum and the following formula of in the range of 0.9 to 1.4, B=POE/(2PO.PE) wherein PE and PO are a molar fraction of an ethylene component and a molar fraction of an &agr;-olefin component, respectively, contained in the ethylene/&agr;-olefin random copolymer (A) and POE is a proportion of the number of ethylene/&agr;-olefin alternating sequences to the number of all dyad sequences, and(vii) a ratio (g&eegr;* value, (&eegr;)/(&eegr;)blank) of the intrinsic viscosity (&eegr;) that is measured as the property (ii) to the intrinsic viscosity (&eegr;)blank of a linear ethylene/propylene copolymer having a weight average molecular weight (measured by a light scattering method) identical with that of the copolymer (A) and having an ethylene content of 70% by mol of in the range of 0.2 to 0.95; and the polypropylene resin (B) having: (i) an MFR (ASTM D 1238, 230Â° C., load: 2.16 kg) of in the range of 1 to 150 g/10 min, and (ii) an initial flexural modulus (ASTM D 790) of not more than 1500 MPa.