Rubber additive
OwnerGregory G. Borsinger, Craig Cawleyinventors
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Abstract
An additive for use in compounding rubber provides for improved process ability and enhanced resistance to cracking as a result of ozone exposure. The additive preferably comprises a polyethylene wax homopolymer having a number-average molecular weight number (Mn) of approximately 1000-1100 and melt viscosity of 20-40 mPas. The additive can be used in the manufacture of tires, belts, hoses, air springs and roofing membranes.
Claims4
An additive for use in compounding rubber, the additive comprising a polyethylene homopolymer wax having a number-average molecular weight number (Mn) ranging from approximately 900 to approximately 1500, and characterized by a density ranging from 0.92 to 0.96 grams/cc, a melt viscosity in the range from about 10 to about 60 mPas @ 149 C. (300 F.), and a melting point ranging from about 112 degrees C. to about 118 degrees C. (based on the Mettler drop point method).
Dependencies are inferred from the claim text.