Organic reinforcing agent for rubber is an organic filler that has a reinforcing effect on rubber, mainly including synthetic rubber and natural resin, and most of the reinforcing effects are synthetic resins. When organic reinforcing agents are used in the production of reclaimed rubber products, they have a variety of functions, such as phenolic resin can be used as a reinforcing agent, tackifier, cross-linking agent, surface binder and so on in the formulation of reclaimed rubber products. Xiaobian today shares with you the varieties of organic reinforcing agents that may be used in the production of recycled rubber products and their functions.
1. Phenolic resin
Phenolic resin is white, gray and brown powder or lump, and the addition of phenolic resin in the production of reclaimed rubber products can improve the hardness, tensile strength and wear resistance of reclaimed rubber vulcanized rubber, and the tearing elongation of vulcanized rubber has been reduced. Phenolic resins can also be used as plasticizers and dispersants to improve the adhesion among natural rubber, synthetic rubber, recycled rubber and metals, as well as the processing performance of rubber compounds.
2. Petroleum resin
Petroleum resin is prepared by condensation and copolymerization of petroleum cracking products, which can be divided into aromatic, aliphatic, aliphatic-aromatic resins, etc., which are brown flakes or blocks, and have good water resistance, weather resistance and chemical resistance. When using reclaimed rubber to produce rubber products, petroleum resin can be used as a reinforcing agent, and has the functions of softener and dispersant.
3. Styrene resin
High styrene resin is prepared by the copolymerization of styrene and butadiene, with a styrene content of about 85%, which has good impact resistance, which can improve the mechanical and electrical properties of reclaimed rubber compound, but the elongation will decrease. Polystyrene resin is a thermoplastic resin with good electrical insulation performance, and can be used as a reinforcing agent and modifier for recycled rubber products.
4. Coumaron resin
Coumaron resin is a copolymer of phenylpropionfuran and indene, and the coumaron resin commonly used in rubber products is a thermoplastic type. When coumeron resin is used in the production of reclaimed rubber products, coumeron with high softening point can be used as a reinforcing agent, and coumaron with low softening point can be used as a softener, tackifier and dispersant to improve the processing performance of reclaimed rubber compound.
5. Lignin
It is prepared by precipitation and drying of papermaking waste liquid, which is yellow or brown and can be used as a regenerated rubber reinforcing agent. The reclaimed rubber vulcanized rubber filled with lignin has the characteristics of elongation, fatigue resistance, flexural resistance, good elasticity E4LYY129 low heat generation, and high tensile strength. However, the vulcanized rubber has poor wear resistance, heat resistance, and large permanent deformation, and is easy to agglomerate when mixing, and difficult to disperse after moisture absorption. Lignin can be used in the production of footwear, bicycle tires and rubber products that require high elasticity and low hardness using reclaimed rubber.
The reinforcing effect of organic reinforcing agent in rubber is not as good as carbon black, so the reinforcing agent commonly used in the production of reclaimed rubber products is mainly carbon black, and organic reinforcing agent is mostly used in special circumstances. When using organic reinforcing agent in reclaimed rubber products, it is not only necessary to consider the performance characteristics of reinforcing agent, but also need to consider the cost.
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