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 molecular weight of approximately 1000-1100 and melts viscosity of 20-40 mPas. The additive can be used in the manufacture of tires, belts, hoses, air springs and roofing membranes.
Claims14
An additive for use in compounding rubber, the additive comprising a polyethylene homopolymer wax having a molecular weight number ranging from approximately 900 to approximately 1500, and characterized by a density ranging from 0.92 to 0.96 gms/cc.
A rubber composition for a tire, comprising:
- up to about 50 parts per hundred weight of ruibber (Phr) of a natural rubber;
- up to about 50 Phr of a butadiene rubber;
- up to about 60 Phr of carbon black;
- and approximately 0.5 to 3.5 Phr of polyethylene wax, the polyethylene wax having a molecular weight of approximately 900 to approximately 1500, and the polyethylene wax characterized by a density ranging from 0.92 to 0.96 grams/cc.
Dependencies are inferred from the claim text.