Patent ID: 6573334
Filing Date: 2003-06-03
Classification: C08L,C09K,Y10T

Abstract:
A bottle closure comprising an olefin polymer composition (A) which comprises:1) 90-100% by weight of a crystalline propylene homopolymer or random copolymer thereof with 0.5-6% by weight of a comonomer selected from ethylene and a C4-C10 &agr;-olefin; said polymers containing at least 94% by weight of a fraction insoluble in xylene at room temperature (Polymer (1)); and 2) 0-10% by weight of an elastomeric copolymer of ethylene with propylene or a C4-C10 &agr;-olefin or mixtures thereof and, optionally, from 0.5 to 10% by weight of a diene, the said elastomeric copolymer containing from 40 to 85 mole % of ethylene (Polymer (2)); 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 23Â° C. at least of 1620 MPa; a value of the strength at yield at 23Â° C. at least of 33 MPa; and an IZOD impact resistance value at 0Â° C. at least of 2.5 kJ/m2.