Propylene random copolymers and use thereof

Abstract

The present invention relates to a propylene random copolymer which satisfies the following requirements [1] to [4], and to various useful molded products obtained by molding the propylene random copolymer: [1] the concentration (Pa, % by mole) of a skeletal constituent derived from propylene (a), and the concentration (Px, % by mole) of a skeletal constituent derived from at least one olefin selected from ethylene (b) and α-olefins having 4 to 20 carbon atoms (c), each of which is contained in the propylene random copolymer, satisfy the following relational expressions (Eq-1) to (Eq-3): 85≦Pa<100   (Eq-1) 0<Px≦15   (Eq-2) Pa+Px=100   (Eq-3); [2] the concentration (Pa, % by mole) of the skeletal constituent derived from propylene (a) contained in the propylene random copolymer, and the melting point (Tm) measured with a differential scanning calorimeter satisfy the following relational expression (Eq-4): 135−4×(100−Pa)<Tm<165−4×(100−Pa)   (Eq-4); [3] the total amount of 2,1-bonded and 1,3-bonded non-stereoregular fractions is less than or equal to 0.2% by mole; and [4] the amount of the n-decane (nC10)-soluble fraction is less than or equal to 2.0% by weight.

Dependencies are inferred from the claim text.