Cobalt salt bonding agent for bonding nitrile butadiene rubber with bare steel framework and preparation method thereof

Abstract

The invention discloses a cobalt salt bonding agent for bonding nitrile butadiene rubber with a bare steel framework and a preparation method thereof, the bonding agent consists of a composite bonding agent, phenolic resin and auxiliaries, the composite bonding agent comprises a main bonding agent and an auxiliary bonding agent, wherein the main bonding agent comprises cobalt boroacylate and cobalt neocaprate, the auxiliary bonding agent is a composite organic salt containing vanadium, nickel and cerium, the phenolic resin comprises a methylene donor and a methylene acceptor, and the auxiliaries comprise a toughener, an activating agent, a vulcanizing activator, a silane coupling agent and a vulcanizing agent; and the cobalt salt bonding agent for bonding the nitrile butadiene rubber with the bare steel framework is obtained by dispersing the composite bonding agent in a phenolic resin carrier, using the auxiliaries for matching and dissolving in mixed solvent for preparing rubber slurry. The cobalt salt bonding agent has the advantages of good thermal stability, good dynamic mechanical properties, capability of being directly coated for use and low cost, and is applicable to high-strength bonding mixed rubber of the nitrile butadiene rubber and regenerated rubber or regenerated rubber powder with material of the bare steel framework.

Description

technical field [0001] The invention relates to an adhesive and a preparation method thereof, in particular to a cobalt salt adhesive for bonding a nitrile rubber and a bare steel skeleton to a mixed rubber of nitrile rubber and reclaimed rubber or reclaimed rubber powder and a bare steel skeleton and a preparation method thereof . Background technique [0002] In the continuous production of large-scale rubber products such as steel radial tires, steel wire reinforced conveyor belts, and steel wire braided rubber hoses, the high-strength bonding of elastomers such as rubber and galvanized or brass-plated steel wire cord braided skeleton materials is usually bonded directly. Addition-type cobalt salt binders, direct-addition cobalt salt binders include cobalt stearate, solid cobalt naphthenate, cobalt neodecanoate, cobalt boroacylate, etc. These cobalt salt binders, especially cobalt boroacylate, have In addition to high-strength adhesive properties, it also has excellent p...

AI Technical Summary

Problems solved by technology

Nitrile rubber has good properties such as oil resistance, wear resistance and corrosion resistance, and is widely used in rubber products, but the self-adhesiveness and mutual adhesion of nitrile rubber are poor, and the high-strength adhesion to metal is a problem for rubber. Many years of problems in the industry, especially in order to reduce the cost of rubber products, many rubber product manufacturers use a large amount of reclaimed rubber and reclaimed rubber powder in the formula of rubber products. Although the reclaimed rubber has been desulfurized, the rubber molecular chain is not completely linear. structure, while reclaimed rubber powder is vulcanized mature rubber, which is almost completely reticular structure, which makes the adhesive ability of the coated modified cobalt salt adhesive mainly chemically bonded and rubber as the carrier drop sharply. Can not meet the needs of such rubber products manufacturers

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