Rubber Composition For Adhering Steel Cord

Abstract

A rubber composition for adhering a steel cord that improves wet heat-resistant adhesioness, particularly heat-resistant adhesioness, by preventing adhesion deterioration due to heat, as well as initial adhesioness between a steel cord and a rubber, is disclosed. The rubber composition comprising 100 parts by weight of a diene rubber component and from 0.1 to 30 parts by weight of composite graphite particles containing boron, obtained by heating and graphitizing carbon black together with boron or a compound containing boron.

1 . A rubber composition for adhering a steel cord comprising 100 parts by weight of a diene rubber component and from 0.1 to 30 parts by weight of composite graphite particles containing boron, obtained by heating and graphitizing carbon black together with boron or a compound containing boron. 
   
   
       2 . The rubber composition for adhering a steel cord as claimed in  claim 1 , wherein a molar ratio of a carbide of boron (B 4 C) constituting the composite graphite particles to the total carbon atoms in the composite graphite particles excluding carbon atoms contained in the carbide is from 1:5 to 1:500. 
   
   
       3 . The rubber composition for adhering a steel cord as claimed in  claim 1 , which is applied to a steel cord having brass plated thereon. 
   
   
       4 . A rubber-steel cord composite comprising a steel cord and a rubber composition; said rubber composition comprising 100 parts by weight of a diene rubber component and from 0.1 to 30 parts by weight of composite graphite particles containing boron, obtained by heating and graphitizing carbon black together with boron or a compound containing boron. 
   
   
       5 . The rubber-steel cord composite as claimed in  claim 4 , wherein a molar ratio of a carbide of boron (B 4 C) constituting the composite graphite particles to the total carbon atoms in the composite graphite particles excluding carbon atoms contained in the carbide is from 1:5 to 1:500. 
   
   
       6 . The rubber-steel cord composite as claimed in  claim 4 , wherein the steel cord has brass plated thereon. 
   
   
       7 . A pneumatic tire comprising the rubber-steel cord composite as claimed in  claim 4 . 
   
   
       8 . A pneumatic tire comprising the rubber-steel cord composite as claimed in  claim 5 . 
   
   
       9 . A pneumatic tire comprising the rubber-steel cord composite as claimed in  claim 6 .