US 12,428,539 B2
Metal-rubber composite, conveyor belt, hose, rubber track, and tire
Kei Kimura, Tokyo (JP); and Motoki Amiya, Tokyo (JP)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 17/642,072
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Aug. 21, 2020, PCT No. PCT/JP2020/031734
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/065244, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-180740 (JP), filed on Sep. 30, 2019; and application No. 2019-215212 (JP), filed on Nov. 28, 2019.
Prior Publication US 2024/0092999 A1, Mar. 21, 2024
Int. Cl. C08K 5/098 (2006.01); B62D 55/24 (2006.01); B65G 15/36 (2006.01); C08K 3/06 (2006.01); C08K 3/36 (2006.01); C08K 9/02 (2006.01); F16L 11/08 (2006.01)
CPC C08K 5/098 (2013.01) [B62D 55/24 (2013.01); B65G 15/36 (2013.01); C08K 3/06 (2013.01); C08K 3/36 (2013.01); C08K 9/02 (2013.01); F16L 11/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A metal-rubber composite, comprising a metal and a rubber of which at least a portion is adhered to the metal, the composite characterized in that:
the metal is plated with zinc;
the rubber is composed of a rubber composition containing at least one selected from the group consisting of: (1) a metal salt of carboxylic acid, having 2 to 25 carbon atoms and any of bismuth, copper, antimony, silver, niobium, molybdenum, zirconium, and nickel as the metal species thereof; and (2) a compound represented by general formula (A) shown below,
[(RCOO)xMO]3Z  (A)
in the general formula (A), “Z” represents one of formulae (z-1), (z-2), (z-3) and (z-4) shown below, “M” represents bismuth, copper, antimony, silver, niobium, molybdenum, zirconium or nickel, each “(RCOO)” independently represents a residue of C2-C25 aliphatic carboxylic acid, and “x” represents an integer equal to {(valence of M)−1};

OG Complex Work Unit Chemistry
a ratio (C1/C2) of the total concentration (C1) of at least one metal element selected from the group consisting of bismuth, copper, antimony, silver, niobium, molybdenum, zirconium, and nickel originally contained in the rubber in a region within 100 nm measured from an adhesion interface of the metal and the rubber toward the rubber side, with respect to the total concentration (C2) of at least one metal element selected from the group consisting of bismuth, copper, antimony, silver, niobium, molybdenum, zirconium, and nickel originally contained in the rubber in a region between the 100 nm depth and the 200 nm depth, measured from the adhesion interface toward the rubber side, is 7.0 or larger.