Whether it is the reclaimed rubber production process or the reclaimed rubber processed in rubber products, it is inseparable from the cooperation of various chemical auxiliaries. The design of the vulcanization system has a great influence on the performance of reclaimed rubber products. Reclaimed rubber products curing system mainly vulcanizing agent, accelerator, activator and anti-scorching agent and other components to the sulfur-based curing system. Different reclaimed rubber products used in the curing system is different, with a variety of formulations dosage is also different.
1, Vulcanizing agent: Vulcanizing agent for reclaimed rubber can prevent vulcanization and reversion during the production and processing of reclaimed rubber, improve the heat resistance of the rubber material, and reduce heat generation and aging resistance. Common vulcanizing agents are sulfur, sulfur selenium, sulfur tellurium, sulfur compounds, peroxides, quinones, amines, resinous compounds, metal oxides and isocyanates, among them sulfur, peroxide and The most used resin.
2, accelerator: We often say that the accelerator is the vulcanization accelerator, the main role is to shorten the curing time, reduce the curing temperature, reduce the amount of curing agent, vulcanized rubber to improve the physical and mechanical properties, improve production efficiency and reduce production costs. Common accelerator products are M, DM, MZ, OZ, NOBS, DZ, TT, TMTT, etc., accelerator M, accelerator DM, accelerator TMTD the most common.
3, activator: activator plays a catalytic role in the production and processing of reclaimed rubber, can shorten the regeneration time, improve the performance of reclaimed rubber products, such as activator 450 has good permeability and stability, activation of vulcanization system, Improve the strength of the reclaimed rubber products, elongation and other indicators to reduce the rubber Mooney viscosity. Common activators are activators 420,450,480, etc., zinc oxide can also be used as a reclaimed rubber activator.
4, anti-coke agent: anti-coke agent is to prevent rubber compounds in the processing of early curing phenomenon substances, effectively control the scorch time and improve the processing of recycled rubber products safety. Reclaimed rubber processing process because of the role of heat may occur early curing phenomenon, so that the loss of mobility and reprocessing energy, scorch retardants is the most direct way to prevent scorch of rubber products. Common anti-scorching agents are oxalic acid, succinic acid, lactic acid, phthalic anhydride, salicylic acid, benzoic acid, oleic acid, etc., of which phthalic anhydride, salicylic acid use more. Anti-scorcher dosage is not easy, otherwise it will affect the performance of recycled rubber products.
Reclaimed rubber products in addition to the system recipe there are reinforcing systems, anti-aging system, to improve the performance of reclaimed rubber products have an important role, the common reinforcing agents are fine particles of carbon black, white carbon black, metal oxides, inorganic salts , High styrene resin, phenolic resin, etc. Common protective agents are antioxidants, antiozonants, anti-flex cracking agent, light stabilizers, UV absorbers, harmful metal inhibitors, physical antioxidants, anti termites Agents, Fungicides and so on. In addition, the production of reclaimed rubber products is also inseparable from plasticizers, dispersants, mold release agents, rubber oils, handling agents, etc., to improve the processing technology of reclaimed rubber to improve the flexibility and flexibility of reclaimed rubber products and prolong the service life of reclaimed rubber products.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits