Equivalent Name: X50-S, TESPT
Appearance: Small black pellets
Sulfur content: 10.8 – 12.3%
Chemical Name:Silane Coupling Agent Si69 (Solid)
CAS No.:
Product Categories:Organic Chemistry
Molecular Formula:(C₂H₅O)₃Si(CH₂)₃–S₄–(CH₂)₃Si(OC₂H₅)₃
Formula Weight:
Appearance:Colorless transparent liquid
Packaging Method:25KG/200L Plastic Drum
Type Of Transportation:By Air/By Sea/By Train/By Express
Sample:Available
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Product Description Of
Active Content: Usually 50%
Density (25°C): 1.10–1.20 g/cm³
Moisture: ≤0.5%
Solubility: Insoluble in water; melts and disperses evenly during rubber mixing
Characteristics: Non-corrosive, low dust, easy weighing, good storage stability, not easy to hydrolyze compared with liquid Si69.
Chemical Characteristics
Solid Si69 is a sulfur-containing silane coupling agent with carrier. It has triethoxysilyl groups and tetrasulfide groups in molecular structure. The ethoxy group hydrolyzes and bonds with hydroxyl groups on inorganic fillers such as silica and silicate; the tetrasulfide group reacts with rubber molecular chains during vulcanization. It improves the interface bonding between inorganic filler and rubber matrix, optimizes processing performance and mechanical properties of rubber compounds. Solid type overcomes the disadvantages of liquid Si69 such as difficult metering, easy adhesion and moisture hydrolysis.
Chemical Properties Of
Safety Information Of
Product Application Of
Tire Industry
Specially used for silica-filled green tire formulations. It reduces rolling resistance, improves wet skid resistance, abrasion resistance and overall durability of tires.
General Rubber Products
Widely applied in conveyor belts, rubber hoses, rubber shoes, sealing parts and shock-absorbing rubber. It lowers Mooney viscosity, improves filler dispersion, enhances tensile strength, tear resistance and dynamic fatigue resistance.
Inorganic Filler Modification
Suitable for surface treatment of precipitated silica, kaolin, talc and silicate fillers. It changes filler from hydrophilic to hydrophobic, improves compatibility with rubber, and allows higher filler loading.
Rubber Composite Materials
Promotes adhesion between rubber and metal, glass, fiber and fabric materials, suitable for rubber-metal composite parts and cord bonding systems.
Modified Plastics & Elastomers
Used as compatibilizer for inorganic-filled modified plastics and thermoplastic elastomers to improve mechanical strength, heat resistance and dimensional stability.
Easy Processing Formulation
Solid granular form is convenient for automatic batching, no liquid leakage, less waste, stable mixing effect and suitable for automated rubber production lines.
Packaging Method Of
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