In automotive engine control systems, the electronic throttle body serves as a core component for regulating intake airflow. Friction loss and wear issues within its internal moving parts directly impact control precision and service life. Traditional coatings often suffer from wear and fluctuating friction coefficients under prolonged friction, leading to malfunctions such as delayed throttle response and unstable idling. Leveraging its unique molecular structure and physical properties, phenyl gum offers an innovative solution for low-friction, wear-resistant coatings on electronic throttle bodies, establishing itself as a key material for enhancing throttle performance.

Balancing low friction with wear resistance is the central challenge in coating design. By introducing phenyl groups into the polysiloxane backbone, phenyl gum achieves a synergistic effect between "lubricity" and "strength." The rigid structure of the phenyl groups enhances the molecular chain's shear resistance, making the coating less susceptible to plastic deformation under repeated friction; consequently, its wear resistance is improved by 40% compared to ordinary silicone rubber. Simultaneously, the hydrophobicity of the phenyl groups—combined with the flexibility of the molecular chains—creates a low-surface-energy interface. This results in a friction coefficient as low as 0.15 (compared to over 0.3 for ordinary rubber coatings) that remains stable across a temperature range of -40°C to 150°C, thereby effectively reducing the rotational resistance of the throttle valve plate.

Designed to withstand the complex environment of the engine compartment, phenyl gum coatings demonstrate exceptional chemical stability. The phenyl groups within the molecular structure resist degradation from fuel vapors, engine oil, and high-temperature oxidation. After undergoing 500 hours of salt spray testing and 1,000 hours of thermal aging testing, the coating exhibited a hardness variation rate of less than 3%, with no signs of swelling or cracking. This ensures that the throttle body maintains its low-friction state throughout long-term operation, preventing the increased friction coefficients and accelerated wear typically associated with coating aging.

Furthermore, the excellent process compatibility of phenyl gum enhances its practical application value. Through solution coating or spray coating techniques, it can be uniformly applied to metal surfaces—such as throttle valve plates and bushings—forming a coating layer just 5–10 μm thick that does not compromise the assembly precision of the components. After a certain automotive manufacturer applied a phenyl raw rubber coating to the throttle plates of its electronic throttle bodies, subsequent testing involving 200,000 start-stop cycles revealed no significant surface wear on the plates. Furthermore, the throttle response time consistently remained within 0.1 seconds, thereby validating the material's reliability under extreme operating conditions.

As requirements for automotive energy conservation and emission reduction continue to rise, phenyl raw rubber is emerging as the preferred choice for electronic throttle coatings, thanks to its comprehensive advantages—specifically, low friction, high wear resistance, and excellent aging resistance. This material not only provides technical support for enhancing engine control precision but also paves a new path for upgrading the reliability of critical automotive components.