Hydrophobic steel wire rubber-covered cord and preparation method thereof

Abstract

The invention belongs to the field of steel wire rubber-covered cords and particularly relates to a hydrophobic steel wire rubber-covered cord and a preparation method thereof. The hydrophobic steel wire rubber-covered cord is prepared from components in parts by weight as follows: 100 parts of rubber, 10-120 parts of white carbon black, 0.2-2.4 parts of a hydrophobic modifier, 0.1-12 parts of a silane coupling, 1-10 parts of zinc oxide, 1-10 parts of an anti-aging agent, 0.1-5 parts of cobalt boroacylate, 1-10 parts of sulfur powder and 1-10 parts of an accelerator. According to the hydrophobic steel wire rubber-covered cord and the preparation method thereof, the hydrophobic steel wire rubber-covered cord has better interface adhesiveness, proper tensile strength and significantly improved wet-heat aging resistance.

Description

technical field [0001] The invention relates to a steel wire rubber-covered cord, in particular to a hydrophobic steel wire rubber-covered cord and a preparation method thereof. Background technique [0002] Compared with the traditional carbon black formula, the silica belt layer formula in radial tires has the advantages of good adhesion, low heat generation, and low rolling resistance: CN201410632796.2 introduces a silica / NR masterbatch for tire belt layers The preparation method of rubber mixing, the technical scheme is to add white carbon black, water, dispersant, and stabilizer to the reactor and then stir at high speed to prepare a highly dispersed white carbon black slurry; add the white carbon black slurry to the natural rubber latex solution After mixing under high-speed stirring, acid coagulation, washing and drying are carried out to obtain white carbon black / NR masterbatch. The process of the invention adopts a wet process to carry out silanization treatment on...

AI Technical Summary

Problems solved by technology

[0008] Therefore, there may be a fatal defect in the existing technology that completely uses the belt layer of white carbon black, thereby causing serious quality problems in the tire. A major reason for the widespread use of

[0009] The inventor initially tried to use a hydrophobic modifier to solve the technical problem that the hydrophilicity of the silica surface caused the rubber-steel wire bonding interface failure to occur in the steel wire belt layer and the steel wire carcass in the tire in some hot and humid areas, but In the late mixing process, the interaction between silica and hydrophobic groups is easily broken by strong mechanical force, and the technical problem of failure of the rubber-steel wire bonding interface will still occur, and it will affect the silane coupling agent to white The coupling effect of carbon black leads to a decrease in the tensile strength of the finished rubber compound. As we all know, the tensile strength of the finished rubber compound is a very important indicator that affects the pull-out force of the steel wire rubberized cord, and it is also the cause of rubber-steel wire adhesion. Therefore, the inventor even once gave up the initial effort to prepare hydrophobic steel rubber-coated cords. However, as the experiment progressed, we were pleasantly surprised to find that by adjusting the order of adding the ingredients in the formula and using a suitable Process treatment can produce hydrophobic steel wire rubber-coated cord with good hydrophobicity and suitable tensile strength

Images