Butyl rubber has excellent airtightness, water tightness, heat resistance, damping and chemical stability, and is widely used in the production of various highly airtight rubber products, heat-resistant products, shock absorbing materials and anti-corrosion products, and the products have good use effect and long life. Butyl rubber products in the production process of rubber compound vulcanization speed is slow, poor mutual adhesion, and the reinforcing effect between the reinforcing agent is a fatal defect, aging after soft and sticky will affect the performance and life of the product, so commonly used other polymer materials to improve the performance of butyl rubber.
Pathway 1 Butyl rubber is mixed with EPDM rubber
Butyl rubber has good airtightness, weather resistance and oxidation resistance, but the processing performance of rubber compound is poor, and the compatibility with rubber oil and reinforced carbon black is poor; ethylene propylene terethene rubber has low density and can be filled with rubber oil and reinforced filler in large quantities. Butyl rubber and EPDM rubber compatibility is high, in butyl rubber mixed with a small amount of EPDM rubber can not only improve the rubber processing technology, improve the compatibility between butyl rubber and rubber oil / reinforcing filler, but also can improve the surface smoothness of the rubber ejection, improve the resistance of vulcanized rubber compression and permanent deformation; butyl rubber vulcanized rubber wear resistance, dynamic mechanical properties, low temperature flexibility and oxidation resistance have been significantly improved.
In actual production, the butyl inner tube formula mixed with an appropriate amount of EPDM rubber is a typical case of EPDM modified IIR.
Pathway 2 Butyl rubber is mixed with polyethylene
Polyethylene has good low temperature resistance, chemical stability, electrical insulation, and can resist most acid and alkali corrosion during use (except for acids with oxidizing properties). The appropriate use of polyethylene modification in the formulation of rubber products with butyl rubber as the main material can significantly improve the pressure-out performance of butyl rubber, increase the hardness and constant elongation stress of butyl vulcanized rubber. In actual production, butyl rubber containing 20-40% polyethylene has good processing performance, oil resistance, fuel resistance, ozone resistance, good performance and long service life.
Butyl rubber/polyethylene blend materials can be used to produce acid and alkali resistant hose inner layer adhesives, gas hoses, anti-corrosion linings, etc.
Pathway 3 Butyl rubber is mixed with butyl recycled rubber
Butyl recycled rubber is a recycled resource processed from waste butyl inner tubes as the main raw material, retaining the basic performance characteristics of butyl rubber, low price, good compatibility with butyl rubber, can directly replace all or part of butyl rubber 2YLYY426-MXF to reduce the cost of raw materials for rubber products. In actual production, the vulcanization performance, adhesion performance and compression and permanent deformation resistance of rubber products using butyl regenerated rubber are better, the production power consumption is low, and the processing performance is significantly improved.
Many butyl rubber products will use a certain proportion of butyl recycled rubber in the production process, which can not only reduce the cost of raw materials, but also improve the performance of butyl rubber.
Butyl rubber and other varieties of polymer materials compatibility is poor, only the above several materials and butyl rubber and use can get a better mixing effect, so many butyl rubber products manufacturers will be ethylene propylene rubber, polyethylene and butyl recycled rubber as a good medicine for butyl modification. In actual production, isoprene recycled rubber can also be used as a comonomer monomer of butyl rubber to improve the vulcanization performance of the rubber compound, and the later Xiaobian will continue to discuss with you.