Sound-deadening composites of metallocene copolymers for use in vehicle applications
AssigneeLear Corporation
InventorsSteven E. Bell, Dwight D. Hull, Jeffrey L. Rice, Dennis C. Young
Life of this patent
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Abstract
Sound-deadening composites of metallocene copolymers having superior properties are used in automotive applications. Flexible composites having low temperature performance properties with improved elongation and impact strength are provided.
Claims40
A sound-deadening composite for use in vehicles prepared from a composition consisting essentially of
- from about 10 to about 30 percent by weight of a metallocene copolymer of ethylene and at least one α-comonomer having from 4 to 10 carbon atoms,
- from about 2 to about 7 percent by weight of plasticizer, and
- from about 60 to about 85 percent by weight of particulate filler.
A sound-deadening composite for use in vehicles prepared from a composition consisting essentially of
- from about 10 to about 30 percent by weight of a metallocene copolymer of ethylene and a comonomer selected from the group consisting of butene, hexene and octene, and mixtures thereof, said metallocene copolymer having a melt flow rate of about 1 to 10 g/10 minutes according to ASTM D 1238 and a density of from about 0.860 to about 0.9 g/cc,
- from about 2 to about 7 percent by weight of an oil plasticizer, and
- from about 60 to about 85 percent by weight of particulate calcium carbonate filler.
A sound-deadening composite used as a backing for automotive carpet prepared from a composition consisting essentially of
- from about 10 to about 30 percent by weight of a metallocene copolymer of ethylene and at least one α-comonomer having from 4 to 10 carbon atoms,
- from about 2 to about 7 percent by weight of plasticizer, and
- from about 60 to about 85 percent by weight of particulate filler.
A sound-deadening composite used as a backing for automotive carpet prepared from a composition consisting essentially of
- from about 10 to about 30 percent by weight of a metallocene copolymer of ethylene and a comonomer selected from the group consisting of butene, hexene and octene, and mixtures thereof, said metallocene copolymer having a melt flow rate of about 1 to 10 g/10 minutes according to ASTM D 1238 and a density of from about 0.860 to about 0.9 g/cc,
- from about 2 to about 7 percent by weight of an oil plasticizer, and
- from about 60 to about 85 percent by weight of particulate calcium carbonate filler.
Dependencies are inferred from the claim text.