| abstract |
PURPOSE: To provide the titled compsn. which can form a laminated sheet having excellent low-temperature heat sealing properties and high strength when laminated on the surface of a crystalline PP substrate, containing a crystalline random propylene copolymer and a random 1-butene copolymer. n CONSTITUTION: The titled compsn. contains a crystalline random propylene copolymer (A) composed of a major portion of propylene and a minor portion of an α-olefin other than propylene and a random 1-butene copolymer (B) composed of ethylene and 1-butene. Component B is composed of 1W50mol% of the ethylene component and 99W50ml% of the 1-butene component and has an intrinsic viscosity η of 0.5W6dl/g (at 135°C in decalin), a m.p. Tm of 30W130°C as measured with a different scanning calorimeter, crystallinity of 1W60% as measured by X-ray diffraction, a boiling methyl acetate soluble content W 1 of 2wt% or below and a content W 2 of an acetone/n-decane solvent mixture (1:1 by volume) solubles at 10°C of less than 5×[η] -1.2 wt%. n COPYRIGHT: (C)1986,JPO&Japio |