Cobalt salt adhesive in use for bonding rubber - metal in high tenacity, and preparation

Abstract

This invention discloses modification of Co salt binder for high-strength rubber-metal binding. The Co salt binder comprises components A and B. Component A comprises: Co salt binder 0.5-8 wt.%, rubber 35-60 wt.%, anti-aging agent 0.5-3 wt.%, plasticizer 0.5-15 wt.%, reinforcer 5-50 wt.%, HRH binder 0-6 wt.% and accelerator 0-2 wt.%. Component B comprises curing agent, and is 4-12 wt. % of component A. The modified Co salt binder retains its previous excellent properties, while can be used by coating like Chemlok binder. The modified Co salt binder can be widely used for high-strength binding of majority rubbers and metals. Besides, the modified Co salt binder has such advantages as high heat resistance (with higher than 95% binding efficiency above 100 deg.C), and low cost (30% lower than Chemlok binder), and can be used in middle- and small-scale rubber industries as well as retreading of meridian tires.

Description

technical field [0001] The invention relates to the improvement of the cobalt salt adhesive used for high-strength bonding of rubber and metal skeleton materials. Background technique [0002] In the rubber product industry such as steel radial tires, steel wire reinforced conveyor belts, and steel braided rubber hoses, high-strength bonding of elastomers such as rubber and metal skeleton materials is required. In order to effectively ensure the high-strength adhesive performance of rubber and metal skeleton, as well as high anti-aging, heat and oxygen resistance, heat and humidity resistance, and salt water corrosion resistance, the prior art usually uses a direct-addition cobalt salt adhesive. Add organic acid cobalt salts such as cobalt naphthenate, cobalt stearate, cobalt oleate, cobalt linoleate, cobalt citronellate and cobalt maleate as described in Chinese patent CN200410001668.4. This type of adhesive is directly added to the rubber compound and kneaded in an intern...

AI Technical Summary

Problems solved by technology

[0006] Small and medium-sized rubber product factories currently widely use the coating-type Chemlock series adhesives, which belong to organic compounds and have poor heat resistance. Experiments show that the adhesion rate is only about 15% under the conditions of use above 100°C. , thus limiting the application of this product in a higher temperature environment; secondly, the adhesive has poor broad-spectrum properties, and the use of grades can only be determined after testing according to different metal skeleton materials and different rubber varieties, which increases the difficulty of use; Furthermore, this type of adhesive is relatively expensive, and the cost of use is high; especially, the adhesive effect of this type of adhesive on bare steel without coating is not ideal, and the adhesive force is only good for surface galvanized and brass-plated skeleton materials. About 60% of the combined force, it is easy to cause the rubber and the metal skeleton to peel off during use