Characteristics of Phenyl Vinyl Raw Rubber
Phenyl vinyl raw rubber is a high-performance rubber material with the following significant characteristics:

Excellent physicochemical properties: Insoluble in water but soluble in organic solvents such as toluene; low compression set; excellent resistance to saturated vapor pressure.
Wide temperature range adaptability: Can be formulated into sealing materials resistant to both high and low temperatures; operating temperature range up to -60～120℃.
Chemical stability: By introducing the phenyl structure, the durability of the material under extreme conditions is significantly improved. Stability and Performance

Electrical Insulation Performance: Possesses high electrical insulation performance, suitable for applications in the power and electronics fields.
Special Requirements for Sealing Materials in Rail Transit Equipment
Sealing materials for rail transit equipment must meet the following stringent standards:
Mechanical Properties: Tensile strength ≥ 5 MPa, hardness (Shore A) 60 ± 5, compression set ≤ 30%
Low Temperature Performance: Must pass the brittle temperature test at -50℃, with no fracture failure.

Flame Retardant Properties: Vertical burning rate ≤ 100 mm/min, smoke density rating ≤ 75, meeting DIN standards. 5510.2-2003 Fire Protection Standard Requirements

Aging Resistance: After aging in hot air at 70℃ for 96 hours, the tensile strength change rate is ≤±20%, and no cracks appear after ozone aging test.

Environmental Adaptability: Must possess high elasticity, anti-aging properties, and resistance to media erosion, adapting to structural deformation and vibration.

Advantages of Phenyl Vinyl Raw Rubber in Rail Transit Sealing Materials
Phenyl vinyl raw rubber is particularly suitable for high and low temperature sealing material applications in rail transit equipment, mainly reflected in:
Temperature Adaptability: Exhibits excellent durability and stability in high-temperature environments.
Maintains good elasticity and flexibility in low-temperature environments.
Long-Term Reliability: Excellent anti-aging properties, meeting the long-term requirements of rail transit equipment. Usage Requirements: Low compression set, ensuring long-term sealing performance.
Comprehensive Performance: Simultaneously meets multiple requirements including mechanical strength, flame retardancy, and electrical insulation. Good chemical inertness and strong resistance to media corrosion.

Application Areas: Suitable for various scenarios such as vehicle door and window sealing, equipment compartment sealing, and pipe penetration sealing. Particularly suitable for sealing critical components sensitive to temperature changes.

Application Cases and Market Situation: Although specific detailed cases of phenyl vinyl rubber in rail transit sealing materials are not provided in the search results, based on its characteristics, this material fully meets the various requirements of rail transit sealing materials, especially showing significant advantages in applications requiring simultaneous high and low temperature performance, long-term reliability, and flame retardancy.

Currently, similar high-performance sealing materials such as ethylene propylene diene monomer (EPDM) rubber sealing systems are widely used in the rail transit field, with a service life of up to 30 years and good fire resistance, insulation, temperature resistance, and corrosion resistance. Phenyl vinyl rubber, as a higher-performance material, has the potential to replace and upgrade in these application scenarios.