Cobalt salt adhesive for adhering natural rubbers and bare-steel frameworks and preparation method thereof

Abstract

The invention discloses a cobalt salt adhesive for adhering natural rubbers and bare-steel frameworks and a preparation method thereof. The adhesive consists of a composite adhesive, phenolic resins and an auxiliary agent, wherein the composite adhesive consists of a main adhesive and an auxiliary adhesive, the main adhesive consists of cobalt boroacylate and cobalt neocaprate, and the auxiliary adhesive is 2-ethylhexoic vanadium; the phenolic resins comprise a methyl donor and a methyl acceptor; the auxiliary agent comprises a toughening agent, an activating agent, a curing activator, a silane coupling agent and a vulcanizing agent; the composite adhesive is dispersed in the vector of the phenolic resin, and is matched with the auxiliary agent; and the mixed solvent is dissolved to prepare adhesive cement so as to obtain the cobalt salt adhesive for adhering natural rubbers and bare-steel frameworks. The cobalt salt adhesive has the advantages of good thermal stability, good dynamic mechanical performance, direct coating application and low cost, and can be used for high-strength adhesion of natural rubbers which contain reclaimed rubbers and reclaimed rubber powder as well as mixed rubbers comprising the natural rubber and universal synthesized rubbers and the bare-steel framework materials.

Description

technical field [0001] The present invention relates to an adhesive and a preparation method thereof, especially for bonding natural rubber containing reclaimed rubber or reclaimed rubber powder, including natural rubber and its mixed rubber with general-purpose synthetic rubber, to bare steel framework, for bonding natural rubber to bare steel framework Cobalt salt binder and its preparation method. 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 ...

AI Technical Summary

Problems solved by technology

However, 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. The powder is vulcanized mature rubber, which is almost completely reticulated, which makes the adhesive ability of the coated modified cobalt salt adhesive mainly chemically bonded and rubber as the carrier drop sharply, and cannot adapt to this type of rubber. The needs of product manufacturers

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