Description

Bis(Triethoxysilylpropyl) Disulfide is a bifunctional organosilane coupling agent containing a disulfide linkage. This compound is critical for enhancing the adhesion and compatibility between inorganic fillers and organic polymer matrices, particularly in rubber formulations. It is primarily used by manufacturers in the tire and rubber industry to improve mechanical properties, reduce rolling resistance, and enhance durability.

Application

• Silica-Filled Rubber Compounding: A key coupling agent in "green tire" technology to improve the reinforcement of silica in tire tread compounds.
• Tire Manufacturing: Enhances abrasion resistance, reduces heat build-up, and improves fuel efficiency in passenger and truck tires.
• Industrial Rubber Goods: Used in belts, hoses, and seals to improve tensile strength, tear resistance, and aging properties.
• Adhesive and Sealant Formulations: Acts as an adhesion promoter between mineral surfaces and organic polymers.
• Filler Treatment: Surface modification of silica, clay, and other mineral fillers to improve dispersion and bonding in various polymer systems.
• Crosslinking Agent: Can function as a sulfur donor in certain rubber vulcanization systems.

Basic Information

Product Name	Bis(Triethoxysilylpropyl) Disulfide
CAS No.	56706-10-6
Molecular Formula	C18H42O6S2Si2
Molecular Weight	474.86 g/mol
Synonyms	Bis(3-triethoxysilylpropyl) disulfide; Si-75; TESPD; 3,3'-Disulfanediylbis(propyl-triethoxysilane); Disulfide, bis(3-triethoxysilylpropyl); Coupling Agent Si-75; TESPT analog; Bis(triethoxysilylpropyl)disulfane
EINECS	Contact for details

Quality Control

Our production of Bis(Triethoxysilylpropyl) Disulfide follows stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against key specifications including purity, refractive index, and specific gravity. A Certificate of Analysis (COA) documenting these results is provided with every shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 95.0%
Refractive Index (n20D)	1.440 - 1.450
Specific Gravity (20°C)	1.030 - 1.070
Moisture (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.