Tubes obtained from a propylene polymer composition

Details Tubes obtained from a propylene polymer composition Tubes obtained from a propylene polymer composition

2005-08-23

2005-08-23

Rabago, Roberto (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C138S118000, C138S177000, C138SDIG007

Reexamination Certificate

active

06933347

ABSTRACT:
Tubes formed from a propylene based composition having a flexural modulus of elasticity of 1,400 to 2,000 MPa and a melt flow index of 0.1 to 1 g/10 minutes, including: from 80 to 97 parts in weight of a propylene homopolymer (A) having an isotacticity index of at least 0.96, and from 20 to 3 parts in weight of a statistical copolymer of propylene (B) containing from 45% to 70% ethylene by mole and/or an alpha olefin containing from 4 to 8 atoms of carbon, the ratio of the intrinsic viscosity of polymer (B) to polymer (A) being at least 1.55 and less than or equal to 3.

REFERENCES:
patent: 6433087 (2002-08-01), Ebner et al.
patent: 316692 (1989-05-01), None
patent: WO99/35430 (1999-07-01), None

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