Automotive weatherstripping
AssigneeUniroyal Chemical Company, Inc.
InventorsAngela E. Bova, Donald W. Tredinnick
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Abstract
The invention concerns a silicone-modified EPDM modified with a freeze release additive of a fatty acid amide and/or optionally, graphite having at least 85% carbon, and compounded and co-extruded onto the surface of elastomeric sponge automotive weatherstripping thereby forming a permanent skin surface on the sponge material. The resulting material has improved and desirable freeze-release and coefficient of friction properties. These improved properties eliminate the need for currently used spray coatings, resulting in manufacturing cost savings and more durable surface.
Claims4
A weatherstripping material comprising a cocured bilayer of (a) a curable elastomer base layer in adherent contact with (b) a curable elastomer freeze release layer containing an organopolysiloxane and a freeze release additive comprising a fatty acid amide of the formula ##STR6## wherein R has from 12 to 50 carbon atoms and from 0 to 4 carbon-to-carbon double bonds.
Dependencies are inferred from the claim text.