Among special synthetic rubbers, butyl rubber has excellent air tightness, heat resistance, shock absorption, and ozone resistance, and is widely used in many fields such as automobile parts, earthquake-proof materials, mechanical transportation, construction engineering, medical products, etc. Butyl rubber is the main material. High-performance damping adhesive with damping imparting agent and inorganic seasoning as additive is an important application. It is mainly used in the sealing of glass sealant and automobile seal. This is because butyl rubber has poor mutual vulcanization and slow vulcanization rate, so it has great restrictions in the field of damping adhesives. So how to improve the adhesive strength of butyl damping adhesive? The emergence of butyl regenerated rubber is a good start.
Butyl rubber is a low-temperature copolymer of isobutylene and isoprene. It is obtained by the cationic polymerization of methyl chloride as a solvent and aluminum trichloride as a catalyst at about minus 100 degrees Celsius. The unsaturated double bonds of butyl rubber are located on the primary bond and contain the side methyl group of the encapsulant. The amount of isoprene used is small, and the amount of crosslinking is equivalent to one double bond per one hundred carbon atoms in the main chain. It is a typical saturated rubber. Although the unique molecular structure of butyl rubber brings unique performance characteristics, it also brings many difficulties for its processing, vulcanization, adhesion, and reinforcement, which limits the use of butyl damping adhesives. range.
The raw materials of butyl reclaimed rubber are different types of waste butyl inner tubes, which are reusable rubbers processed through many special processes. After being fully desulfurized and smelted in the production process, they have good processing performance and high plasticity. High vulcanization speed, high scorch safety, and good compatibility with butyl rubber. It can not only reduce the cost of raw rubber in the production of butyl rubber products, but also improve the vulcanization efficiency of butyl rubber products and reduce the processing energy. Consumption, improving the process performance of butyl rubber; the most important is the damping performance of butyl regenerated rubber itself. Because butyl rubber has better self-adhesion and mutual viscosity, it can be used in the production of high-performance damping adhesives. It can save energy consumption, improve mixing and rolling performance, and reduce costs. It can also further improve the bonding performance of high-performance damping adhesives and broaden the range of performance.
In the production of high-performance damping adhesives, rubber product manufacturers can adjust the addition ratio of butyl regenerated rubber and butyl rubber according to the actual needs of adhesives, and can also completely use butyl regenerated rubber, among which petroleum resin and rosin are Commonly used damping imparting agent, calcium carbonate or barium sulphate is a common filling material. If the volume requirement of the adhesive is large, the amount of inorganic seasoning can be increased in an appropriate amount, and the cost of the rubber material can be reduced on the premise of satisfying the performance requirement. In actual production, butyl reclaimed rubber is an ideal material to replace butyl rubber to produce high-performance damping adhesives. Chlorobutyl rubber and chlorinated butyl reclaimed rubber are also good choices, among which chlorinated butyl reclaimed rubber. The color is lighter than that of the butyl inner tube reclaimed rubber, and can also be used in the production of gray-based adhesives, significantly reducing the production cost.