Polyolefin compositions with improved properties

Details Polyolefin compositions with improved properties Polyolefin compositions with improved properties

2005-08-16

2005-08-16

Nutter, Nathan M. (Department: 1711)

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

Synthetic resins

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

C525S192000, C525S240000

Reexamination Certificate

active

06930149

ABSTRACT:
The invention relates to polyolefin compositions with good impact strength and transparency comprisinga) 85-98 wt % based on the total weight of the composition of a heterophasic propylene/α-olefin copolymer comprising a polymer or copolymer of propylene and an α-olefin with 0-15 mol % of the α-olefin as matrix polymer and a propylene/α-olefin rubber copolymer comprising 20-80 mol % of the α-olefin andb) 15-2 wt % based on the total weight of the composition of an ethylene homopolymer or an ethylene/α-olefin copolymer, the α-olefin in the ethylene copolymer having 4-10 carbon atoms, the ethylene homo- or copolymer having a density lower than 0.925 g/m3.processes for producing these compositions and their use. The compositions are particularly useful for food packaging, especially for deep freezing applications.

REFERENCES:
patent: 5331047 (1994-07-01), Giacobbe
patent: 6590034 (2003-07-01), Wanic et al.
patent: 6770714 (2004-08-01), Ommundsen et al.
patent: 0373660 (1990-06-01), None
patent: 0814127 (1997-12-01), None

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