Butyl rubber has excellent air tightness, water tightness, heat resistance, damping and chemical stability, and is widely used in the production of various high air tightness rubber products, heat-resistant products, shock absorption materials and anti-corrosion products. The product has good use effect and long life. In the production process of butyl rubber products, the slow vulcanization speed, poor mutual adhesion, and weak reinforcement effect with the reinforcing agent are fatal defects. After aging, it becomes soft and sticky and affects the performance and life of the product, so other commonly used Polymer materials improve the performance of butyl rubber.
Route 1 Blending of butyl rubber and EPDM rubber
Butyl rubber has good air tightness, weather resistance, and oxidation resistance, but its rubber processing performance is poor, and it has poor compatibility with rubber oil and reinforcing carbon black; EPDM rubber has low density and can be filled with rubber oil and reinforcing fillers. Butyl rubber has high compatibility with EPDM rubber. Adding a small amount of EPDM rubber to butyl rubber can not only improve the rubber processing technology, but also improve the butyl rubber and rubber oil/reinforcing filler. The compatibility between the two can also improve the surface smoothness of the rubber extrudate and improve the compression set resistance of the vulcanized rubber; the abrasion resistance, dynamic mechanical properties, low temperature flexibility and oxidation resistance of the butyl rubber vulcanizate have been significantly improved .
In actual production, butyl inner tube formula mixed with appropriate amount of EPDM rubber is a typical case of EPDM modified IIR.
Route 2 Blending of butyl rubber and polyethylene
Polyethylene has good low temperature resistance, chemical stability, electrical insulation, and can resist most acid and alkali corrosion during use (except acids with oxidizing properties). The use of polyethylene modification in the formulation of rubber products with butyl rubber as the main material can significantly improve the extrusion performance of butyl rubber and increase the hardness and tensile stress of butyl vulcanizate. In actual production, butyl rubber containing 20-40% polyethylene has good processing performance, oil resistance, fuel resistance, ozone resistance, good product performance and long life.
The butyl rubber/polyethylene blend material can be used to produce acid and alkali resistant hose inner layer rubber, gas hose, anticorrosive lining, etc.
Route 3 Blending of butyl rubber and butyl reclaimed rubber
Butyl reclaimed rubber is a renewable resource processed from waste butyl inner tubes as the main raw material. It retains the basic performance characteristics of butyl rubber, is low in price and has good compatibility with butyl rubber, and can directly replace butyl raw rubber 2LLYY727 in whole or in part. Raw material cost of rubber products. In actual production, rubber products using butyl reclaimed rubber have better vulcanization performance, adhesion performance, compression and permanent deformation resistance, low production power consumption, and significantly improved processing performance.
At present, a certain proportion of butyl reclaimed rubber is used in the production process of many butyl rubber products, which can reduce the cost of raw materials and improve the performance of butyl rubber.
Butyl rubber has poor compatibility with other types of polymer materials. Only the above-mentioned materials and butyl rubber can get a better blending effect. Therefore, many butyl rubber products manufacturers will use ethylene propylene rubber, polyethylene And butyl reclaimed rubber as a good medicine for butyl modification. In actual production, isoprene reclaimed rubber can also be used as a comonomer of butyl rubber to improve the vulcanization properties of the rubber. The editor will continue to discuss with you later.