Polyolefin composition with high filler loading capacity

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

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C524S502000

Reexamination Certificate

active

07737206

ABSTRACT:
Disclosed are highly filled thermoplastic olefin compositions and, in particular, thermoplastic olefin compositions that comprise propylene/alpha-olefin copolymers and a high level of organic or inorganic filler. Specifically, the description addresses a filled polymer composition comprising: (a) a first polymer component comprising propylene copolymer having a heat of fusion<about 75 J/g and a triad tacticity of from about 50% to about 99%, the first polymer component having a melt flow rate at 230° C.≦about 800 g/10 min.; and (b) at least about 15% by weight of a filler, based on the total weight of the filled composition. Such compositions are useful as sound barriers, flame retardant compositions, roofing membranes, and the like.

REFERENCES:
patent: 6251995 (2001-06-01), Hesse et al.
patent: 6852424 (2005-02-01), Dharmarajan et al.
patent: 2004/0198912 (2004-10-01), Dharmarajan et al.
patent: 2005/0032959 (2005-02-01), Cheung et al.
patent: 2005/0131152 (2005-06-01), Dharmarajan et al.
patent: 2005/0222314 (2005-10-01), Credali et al.

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