B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/183, 152/85.1
B29D 30/40 (2006.01) C08J 5/10 (2006.01) C08L 21/00 (2006.01)
Patent
CA 1216113
-25- ABSTRACT OF THE DISCLOSURE Rubber compositions and articles such as tires having improved metal adhesion and metal adhesion retention to metallic reinforcement including brass-plated and zinc- plated steel cord. The improvement comprises admixing from about 0.25 to about 15.0 parts per hundred rubber (phr) of a cobalt or nickel salt and from about 1.0 to about 12.5 phr of an amine-modified, non-heat reactive alkylphenol- formaldehyde resin with a vulcanizable rubber composition prior to embedding the metallic reinforcement therein and curing. A method for improving the metal adhesion and metal adhesion retention between a vulcanizable rubber and metallic reinforcement includes the steps of dispersing from about 0.25 to about 15.0 phr of a cobalt or nickel salt in a vulcanizable rubber composition, dispersing from about 1.0 to about 12.5 phr of an amine-modified, non-heat reactive alkylphenol-formaldehyde resin in the same rubber com- position and curing the admixed rubber composition with embedded metallic reinforcement which consists of brass- plated and zinc-plated steel cord. By the addition of the cobalt salt and resin of the present invention to a vul- canizable rubber, at least 50 percent better metal adhesion is obtained as compared with an otherwise identical rubber stock devoid of these components.
445282
Davis James A.
Koch Robert C.
Firestone Tire & Rubber Company (the)
Robic Robic & Associes/associates
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