| 摘要 |
<p>A bottle closure comprising an olefin polymer composition (A) which comprises: 1) 90-100 % by weight of a crystalline propylene homopolymer or propylene/C2-C10 α-olefin random copolymer; said polymers containing at least 94 % by weight a fraction insoluble in xylene at room temperature; and 2) 0-10 % by weight of an ethylene/C3-C10 α-olefin elastomeric copolymer; provided that when the amount of Polymer (2) is 0 % by weight, Polymer (1) is selected from the above said random copolymers. Said composition (A) having a flexural elastic modulus value at 23 °C at least of 1620 MPa; a value of the strength at yield at 23 °C at least of 33 MPa; and an IZOD impact resistance value at 0 °C at least of 2.5 kJ/m2.</p> |
