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1. (WO2016052450) METAL CORD-RUBBER COMPOSITE BODY

Pub. No.:    WO/2016/052450    International Application No.:    PCT/JP2015/077403
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Tue Sep 29 01:59:59 CEST 2015
IPC: D07B 1/16
D07B 1/06
Applicants: BRIDGESTONE CORPORATION
株式会社ブリヂストン
Inventors: YAMAGISHI, Junichi
山岸 淳一
MUSHA, Shinichi
武者 信一
KANATOMI, Yoshihiko
金冨 芳彦
Title: METAL CORD-RUBBER COMPOSITE BODY
Abstract:
The present invention is a metal cord-rubber composite body obtained by coating one of the following with a rubber composition: a metal cord that comprises a single steel wire having brass plating on the circumferential surface thereof; or a metal cord obtained by twisting together a plurality of the steel wires. The metal cord-rubber composite body is characterized in that the content of phosphorus atoms in a surface layer area from the surface of the brass plating to a depth of 5 nm inward in the radial direction of the wire is 1.5 at% or less and the rubber composition is obtained by blending a rubber component (A) and 0.1 to 10 parts by mass of a co-condensate (B) with respect to 100 parts by mass of the resin component (A), said co-condensate (B) having a softening point of 150 °C or less and comprising a p-tert-butylphenol-derived constituent unit represented by formula (1), an o-phenylphenol-derived constituent unit represented by formula (2), and a resorcinol-derived constituent unit represented by formula (3). The metal cord-rubber composite body has improved adhesiveness, particularly wet heat adhesiveness, and is obtained by coating a metal cord having a reduced content of phosphorus atoms in the surface of a brass-plated layer with a rubber composition that has a novel co-condensate blended thereinto and that does not use p-tert-octylphenol or p-nonylphenol, the use of which may be restricted by laws and regulations.