Abstract: The flexible compositions having no elastomeric fractions comprise: A) from 10 to 90 parts by weight of random copolymer of propylene and at least one comonomer selected from ethylene and C4-C8 alpha-olefins having a melting point of at least 100° C. and not exceeding 140° C. and a flow index measured at 230° C. under a weight of 2.16 kg (ASTM standard D1238, 1986) of from 0.5 to 15 g/10 min, and B) from 90 to 10 parts by weight of plastomer prepared with participation of a metallocene catalyst and consisting of a random copolymer of ethylene and at least one C3-C10 alpha-olefin having a density of from 0.860 to 0.920 g/cm3, a melt flow index measured at 190° C. under a weight of 2.16 kg (ASTM standard D1238, 1986) of from 0.5 to 30 g/10 min, and a molecular mass distribution Mw/Mn of at most 4. These compositions provide an excellent compromise between flexibility and low-temperature impact resistance and heat resistance.

Abstract: A propylene block copolymer comprising(A) 60-90 weight %, based on the total amount of the block copolymer, of a first block of a propylene polymer, optionally containing a small amount of copolymerised ethylene,(B) 40-10 weight %, based on the total amount of the block copolymer, of a second block of an ethylene-propylene copolymer containing 1-10 weight % of ethylene, and the total ethylene content of the block copolymer being within the range of 0.1-2.5%. The weight process for the manufacturing of the propylene block copolymer and use of it for the manufacture of bioriented bottles.

Abstract: Compositions comprising a mixture of propylene polymers consisting of from 15 to 85% by weight of a propylene polymer (A) whose isotactic index is at least 0.95 and from 85 to 15% by weight of a block copolymer (B) having a fraction soluble in n-decane, measured at 23.degree. C., of greater than 13% by weight.

Abstract: Compositions based on propylene polymers (compositions (C)) comprising:from 68 to 80% by weight of a statistical propylene copolymer (copolymer (A)) which contains from 12 to 20% by weight of units derived from 1-butene and from 0 to 2% by weight of units derived from ethylene, andfrom 20 to 32% by weight of a statistical propylene copolymer (copolymer (B)) which contains from 0 to 15% by weight of units derived from 1-butene and from 1 to 8% by weight of units derived from ethylene.