Composition of a process propylene polymer matrix for coating the outer surface of a metal tube and metal tube

摘要

In the present invention a polymer composition is disclosed comprising a propylene polymer matrix containing, in percent by weight with respect to total composition: A) 60-90 percent of one or more heavy mineral filling agents, the specific weight of this(these) being higher or equal to 3; and B) 0.1-4 percent of an agent for compatibility for filling agent(s); wherein said compositions have a MFRL from about 1 to about 10 g/10 minutes, and a breaking elongation from about 1.5 to 100 percent, and a flexion modulus from 3,000 up to 10,000 MPa.