Phenolic resin can not only be used as a reinforcing agent in the production of rubber products, but also as a thermoplastic tackifier and processing aid to improve rubber processing performance. From the perspective of compatibility, nitrile rubber and phenolic resin have good compatibility. Therefore, phenolic resin is often used in the production of nitrile rubber products or nitrile reclaimed rubber products to improve the comprehensive indicators of nitrile products and improve the rubber Material process performance.
1. The role of phenolic resin in nitrile rubber
Phenolic resin is easy to disperse in nitrile rubber compound. When used as a reinforcing agent in the production of nitrile rubber products, the hardness of nitrile vulcanizate is improved, the tensile performance and tear resistance are excellent. 2LLYY121 has excellent performance, aging resistance and swelling resistance. Improved, nitrile rubber products have good impact resistance, fatigue resistance, abrasion resistance, low temperature resistance, and chemical resistance.
2. The amount of phenolic resin in the nitrile compound
Theoretically, the phenolic resin can be mixed with the nitrile rubber in any ratio, and the resin has a good plasticizing effect on the nitrile rubber before being cured. When adding phenolic resin to sulfur vulcanization in the production of nitrile rubber or nitrile reclaimed rubber products, the more phenolic resin is used, the tensile strength, tear strength and hardness of the rubber will increase, and the elongation at break and wear resistance will be somewhat Decrease; usually the amount of phenolic resin in nitrile rubber compound is controlled between 50-100 parts.
3. Compounding agent for nitrile compound containing phenolic resin
When phenolic resin is used in nitrile rubber/reclaimed rubber products, sulfur vulcanization is usually selected, and the accelerator DM is used in conjunction; pottery clay is recommended for the reinforcement and filling system. Dibutyl phthalate is commonly used in softening and plasticizing systems, and a small amount of coumarone can be added if necessary; dibutyl phthalate can improve the fluidity and stiffness of the rubber, and the amount is controlled below 10 parts. In actual production, increasing the amount of sulfur can significantly increase the hardness of the rubber compound, but the impact resistance of the rubber compound decreases, so the amount of sulfur should be controlled below 7 parts.
Phenolic resin can be used as a rubber additive or as the main material in the production of nitrile rubber or nitrile reclaimed rubber products. The specific application method is determined according to actual needs. When nitrile rubber or nitrile reclaimed rubber products are mixed with more phenolic resin, the production process conditions must be adjusted, especially the rubber mixing process and vulcanization process. Later editors have the opportunity to discuss with you the key points of the production process of phenolic resin in nitrile rubber compound.
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