Butyl reclaimed rubber retains the basic performance characteristics of butyl rubber, with good air tightness, heat resistance and chemical resistance. It is widely used in rubber inner tubes, vulcanized capsules, shock absorbers, anti-corrosion products, etc., effectively reducing the production cost of rubber products. When butyl reclaimed rubber is used as the main raw material to produce rubber products, reasonable design of the formula of butyl reclaimed rubber products can further improve the comprehensive indicators of finished products while reducing costs. What are the commonly used compounding agents in the vulcanization formula of butyl reclaimed rubber? What role does it play in butyl reclaimed rubber products
1. Common compounding agents of butyl reclaimed rubber curing system and their functions
Vulcanization systems commonly used in the production of butyl reclaimed rubber products include sulfur accelerator system, resin curing system, quinone oxime curing system, etc
In the sulfur accelerator system of butyl reclaimed rubber, the curing rate of sulfur/accelerator M/TMTD curing system is appropriate and the processing safety is high; When the accelerator DM/TDEDC is used together, the butyl reclaimed rubber has fast curing speed and good reversion resistance; The accelerator DTDM is combined with the accelerator TMTD, which has good processing safety, compression resistance and heat resistance. The reclaimed NBR vulcanized with resin curing system has good aging resistance, superheated steam resistance and compression deformation resistance
2. Common compounding agents of butyl reclaimed rubber reinforcement filling system and their functions
When producing rubber products with reclaimed butyl rubber as the main raw material, carbon black is often used for reinforcement. For light colored reclaimed butyl rubber products, it is recommended to use white carbon black for reinforcement and talcum powder, calcium carbonate, clay, etc. for filling
Using carbon black with small particle size, such as super wear-resistant furnace black, medium wear-resistant furnace black, high wear-resistant furnace black, etc., butyl reclaimed rubber vulcanizate can obtain high tensile strength, tear resistance, etc. The hot cracking carbon black with larger particle size can give butyl reclaimed rubber greater elongation at break. The reclaimed butyl rubber vulcanizate with semi reinforced carbon black has the characteristics of good elasticity, low elongation, high elongation, low heat generation and good aging resistance
The tensile strength and constant elongation stress of butyl reclaimed rubber vulcanizate were significantly improved by flake talc powder; Filling calcium carbonate can reduce the loss of elongation and elasticity; The reinforcement effect of clay in butyl reclaimed rubber is better than that of calcium carbonate, which can significantly improve the tensile strength and elongation stress
3. Common compounding agents of butyl reclaimed rubber softening system and their functions
The commonly used softeners in the production of butyl reclaimed rubber products are paraffin oil and ester plasticizers. Paraffin oil can improve the extrudability of butyl reclaimed rubber and reduce its annual viscosity; With the increase of paraffin oil content, the tensile strength, constant elongation stress and hardness of butyl reclaimed rubber vulcanizate decreased, and the elongation at break increased. Ester plasticizers can improve the low-temperature performance and compression set resistance of butyl reclaimed rubber
When producing rubber products with butyl reclaimed rubber as the main raw material, the rubber product manufacturer needs to select the appropriate compounding agent according to the product's technical indicators and reasonably design the formula of butyl reclaimed rubber products. Later, the editor will continue to share relevant issues with you
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