Heterophasic propylene polymer

Details Heterophasic propylene polymer Heterophasic propylene polymer

2007-10-09

2007-10-09

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...

C525S232000, C525S240000, C525S241000

Reexamination Certificate

active

10468059

ABSTRACT:
The invention provides a heterophasic propylene polymer composition comprising the following components: i) 60 to 90% wt, relative to the total weight of components i), ii) and iii), of a propylene polymer matrix comprising a propylene homopolymer and, optionally a propylene copolymer, said propylene polymer matrix having an ethylene content of no more than 5% wt; ii) wt 5 to 30% wt, relative to the total weight of components i), ii) and iii), of an elastomer; and iii) 5 to 25% wt, relative to the total weight of components i), ii) and iii), of an ethylene copolymer plastomer having a density of not more than 910 kg/m3and a melt flow rate MFR2.16(190° C.) of at least 0.5 g/10 minutes at 190° C. under a weight of 2.16 kg.

REFERENCES:
patent: 5747592 (1998-05-01), Huff et al.
patent: WO98 21275 (1998-05-01), None
patent: WO98 54260 (1998-12-01), None
patent: WO98 59002 (1998-12-01), None
patent: WO 01 77224 (2001-10-01), None
Amberg et al, Ethylene-Propylene Rubber, Industrial and Engineering Chemistry, May 1961, vol. 53, No. 5, pp. 368-370.

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