Butyl reclaimed rubber has excellent air tightness, heat resistance, chemical stability, etc. It can be used alone or in combination with butyl raw rubber, EPDM rubber, etc., effectively reducing the cost of raw materials while ensuring the quality of rubber products. In actual production, the vulcanization system directly affects the physical properties of butyl reclaimed rubber vulcanizates, and the vulcanization systems of different types of butyl reclaimed rubber products vary greatly. So what are the commonly used vulcanization systems for butyl reclaimed rubber, and what are the performance characteristics of butyl reclaimed rubber vulcanizates?
1. Sulfur-accelerator
Sulfur-accelerator is one of the common vulcanization systems in the production of rubber products. When using butyl reclaimed rubber to produce rubber products, the vulcanization system that uses sulfur/accelerator M/accelerator TMTD has the characteristics of proper vulcanization speed and high processing safety; accelerator DM/accelerator TDEDC vulcanizes butyl reclaimed rubber, when vulcanized Fast curing speed, good physical properties of the vulcanized rubber, good resistance to reversion; when the accelerator DTDM/accelerator TMTD is vulcanized, the butyl reclaimed rubber has a slower vulcanization speed, good processing safety, compression resistance and heat resistance of the vulcanizate good.
2. Quinone oxime curing system
When using butyl reclaimed rubber and butyl rubber to produce rubber products, the quinone oxime vulcanization system can be selected. When p-quinone dioxime is combined with lead red, the butyl vulcanizate has good physical properties and poor aging resistance; when p-quinone dioxime/accelerator DM/lead oxide is combined, the butyl 2YLYY913 compound has fast vulcanization speed, easy scorching, and vulcanization Good electrical performance and good aging resistance; when p-quinone dioxime is combined with dibenzoyl p-quinone dioxime, butyl vulcaniz The comprehensive performance of the base vulcanizate is good.
3. Resin curing system
Butyl reclaimed rubber or butyl rubber/reclaimed rubber combined rubber can also be vulcanized with resin. The common combination is alkyl phenolic resin / zinc oxide / brominated hydrocarbon cresol resin / stannous chloride. Butyl vulcanizate has excellent Anti-aging performance, resistance to superheated steam, resistance to compression deformation.
In actual production, the sulfur-accelerator system is suitable for tire inner tubes, waterproof membranes, container linings and most butyl rubber products, continuous vulcanization cables, sealants, glue, etc. It is recommended to choose quinone oxime vulcanization system, vulcanization bladder, water It is more appropriate to choose resin vulcanization for tires. The physical and mechanical properties of butyl rubber after vulcanization with different vulcanization systems are different from aging resistance and compression deformation resistance. Rubber product manufacturers need to choose a suitable vulcanization system according to the specific performance requirements of rubber products/reclaimed rubber products.
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