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US 4,704,337 AGranted
Rubber adherable steel reinforcing elements with composite surface coating
OwnerWilfried Coppens, Hugo Lievensinventors
Life of this patent
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Abstract
A steel element for reinforcing a rubber article comprises a brass layer and at least one additional outer film of metal or metal alloy selected from the group containing Fe, Ni, Mn, Cr, Mb, Va, Ti, Zi, Nb, Ta, Hf and W.
Claims16
A reinforcement for vulcanizable rubber articles, comprising:
- (a) an elongated high carbon steel element;
- (b) a brass layer of substantially homogeneous .alpha.-structure and being substantially free of .beta.-structure having a thickness of about 0.05 .mu.m to about 0.5 .mu.m covers said element and said layer comprising from about 55 percent by weight to about 75 percent by weight copper and from about 25 percent by weight to about 45 percent by weight zinc;
- and,
- (c) a rubber adherent film having a thickness of from about 0.0005 .mu.m to about 0.05 .mu.m covers said layer and said film selected from the group consisting of iron, manganese molybdenum, mandium, niobium, tantolum, tungsten and chromium and alloys thereof, nickel and binary alloys thereof selected from the group consisting of Ni-Fe, Ni-Mn, Ni-Cr, Ni-Zr and Ni-Co, and ternery nickel alloys comprising any two of said binary alloying elements.
1 more element
A tire wire, comprising:
- (a) a high carbon steel wire;
- (b) a brass layer of substantially homogeneous .alpha.-structure which is substantially free of .beta.-structure covers said wire and has a thickness of from about 0.05 .mu.m to about 0.5 .mu.m and said layer comprising from about 55 percent by weight to about 75 percent by weight copper and from about 25 percent by weight to about 45 percent by weight zinc;
- and,
- (c) a rubber adherent film covers said layer and has a thickness prior to drawing of the wire of about 0.0005 .mu.m to about 0.05 .mu.m and said film comprises a metal selected from the group consisting of iron, manganese, chromium, molybdenum, vanadium, niobium, tantalum and tungsten.
1 more element
Dependencies are inferred from the claim text.