New Adhesion Promoters Based On Synthetic Resins

The purpose of our work was to obtain promoters which could increase the strength of adhesion between rubber and brass-plated steel cord, comparing them with each other and with known adhesion promoters (e.g., cobalt stearate). Modifiers were synthesized on the basis of the available low-cost raw materials: alkylphenol amine resin and phenol formaldehyde resin. These promoters were added to the rubber mix based on isoprene rubber. The mechanical properties of vulcanizates were characterized. The results showed that no significant differences in mechanical properties between vulcanizates which contain various promoters. The pull-out test was carried out. The results showed that the adhesive strength of rubbers containing the proposed promoters are at the level of rubber, which contains cobalt stearate, and higher than those without the promoters. So, we have proposed new promoters, whose use in the production can be economically beneficial. The best performance among the promoters of this kind belongs to promoter which based on alkylphenol amine resin.