Butyl reclaimed rubber retains the basic performance characteristics of butyl rubber, has good air tightness, heat resistance, and corrosion resistance. It can directly replace butyl rubber or be used with butyl rubber to produce rubber products, effectively reducing raw materials under the premise of ensuring product quality cost. The rubber softener can soften the butyl rubber, thereby improving the plasticity of the rubber and increasing the degree of dispersion of other compounding agents in the rubber. In actual production, what are the commonly used softeners for butyl reclaimed rubber products? What specific role does it have.
1. Commonly used softener for butyl reclaimed rubber
When using softeners to further improve the operating performance of butyl reclaimed rubber or butyl rubber/reclaimed rubber combined rubber, saturated softeners and plasticizers are generally used. Commonly used are petroleum hydrocarbon softeners, aliphatic hydrocarbon softeners 2YLYY1013 and aromatic hydrocarbons. Class softener, the dosage is controlled among 15-30 parts. For butyl rubber compounds, the use of unsaturated plasticizers such as rosin and pine tar will delay vulcanization, so avoid using them as much as possible.
2. The role of petroleum softeners in butyl reclaimed rubber
In actual production, butyl reclaimed rubber or butyl rubber/reclaimed rubber products mostly use petroleum softeners such as paraffin oil and wax. Adding paraffin oil can reduce the Mooney viscosity of the butyl rubber and delay the Mooney scorch time; improve the extrusion performance of butyl rubber/reclaimed rubber; further improve the ozone resistance of butyl reclaimed rubber or butyl rubber/reclaimed rubber products , Compression and permanent deformation resistance. It should be noted that the use of paraffin oil will also reduce the heat resistance of butyl reclaimed rubber, and the amount of it needs to be reasonably controlled in heat-resistant products.
3. The role of ester plasticizers in butyl reclaimed rubber
Ester plasticizers are a large category of rubber plasticizers. Theoretically, they can improve the physical and mechanical properties of butyl reclaimed rubber or butyl rubber/reclaimed rubber combined rubber, such as giving the rubber better elasticity and lower Generate heat, while reducing the hardness and constant elongation stress of the rubber compound. In actual production, the low-temperature performance of the butyl rubber compound added with ester plasticizer has been significantly improved, and the compression set resistance and heat resistance are reduced.
Compared with butyl raw rubber, butyl reclaimed rubber has better fluidity and plasticity, faster vulcanization speed, and better compatibility with other rubbers. When using butyl reclaimed rubber to produce low-cost butyl rubber products, rubber product manufacturers can appropriately reduce the amount of softeners and plasticizers in the formula to effectively reduce the cost of raw materials while ensuring product quality.
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