Patent ID: 8450422

Claim:
A masterbatch composition comprising, all percent amounts being by weight: A) 10-45% of a homopolymer of propylene or a copolymer of propylene with one or more comonomer(s) selected from ethylene and CH 2 ═CHR alpha-olefins where R is a 2-8 carbon alkyl, which copolymer contains from 1 to 8% of comonomer(s); B) 10-30% of a copolymer of propylene with ethylene, containing from 18 to 45% of ethylene; C) 42-60% of a copolymer of propylene with ethylene, containing from 55 to 85% of ethylene; said composition having an MFR L value from 0.01 to 10 g/10 min., a value of the intrinsic viscosity [η] sol of the fraction soluble in xylene at room temperature from 1.5 to 2.5 dl/g and a value of the ratio [η] sol /MFR L equal to or lower than 6.