Propylene block copolymer

Details Propylene block copolymer Propylene block copolymer

2005-07-12

2005-07-12

Teskin, Fred (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...

C525S268000

Reexamination Certificate

active

06916886

ABSTRACT:
To provide a propylene based block copolymer that, when used as a molding material, exhibits an extremely good stiffness-impact resistance balance and has good heat resistance and excellent moldability, and therefore, in molding, good appearance is revealed.That is, the invention provides a propylene based block copolymer obtained through a preceding stage step of producing a propylene polymer component (PP) and a subsequent stage step of producing a propylene-ethylene copolymer component (EP) using a metallocene catalyst, wherein the block copolymer satisfies specific requisites.

REFERENCES:
patent: 5322902 (1994-06-01), Schreck et al.
patent: 11-228612 (1999-08-01), None
patent: 11-349649 (1999-12-01), None
patent: 2001-181360 (2001-07-01), None
patent: 2001-310921 (2001-11-01), None

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