Crosile® Sulfur Silane Coupling Agent for Rubber

Organosilanes containing sulfur in rubber are a type of organosilicon compound, which contain both sulfur and silicon elements in their molecules, typically with a structure similar to that of silanes. These compounds can be used as adhesives, lubricants, antioxidants, and anti-corrosion agents.

Item NO.:
Sulfur Silane
Chemical Name:
Sulfur Silane Coupling Agent Crosile
Properties:
1. Sulfur containing organosilane modified Silica 2. Greater tensile strength 3. Reduced compression set 4. Increased abrasion resistance 5. Low rolling resistance

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Crosile® Sulfur Silane Coupling Agent for Rubber

Product Introduction

Crosile® Sulfur Silane Coupling Agents are sulfur-functional organosilanes widely used in rubber compounds, adhesives, composite materials, metal surface treatment, and construction applications. Sulfur silanes are among the most important functional silanes used in the rubber industry.

In rubber formulations, sulfur silanes improve the interaction between silica or other mineral fillers and rubber polymers, enhancing filler dispersion and reinforcing efficiency. They also contribute to the vulcanization process through their sulfur-containing functional groups. As a result, sulfur silanes are extensively used in the production of tires and high-performance rubber products.

Product List（ALL grades≥98% purity）

Product Type	Chemical Name	CAS NO	EC NO	Purity	Function	Application
Crosile® 69	Bis [3-(triethoxysilyl) propyl] tetrasulfide	40372-72-3	254-896-5	≥98%	Boost modulus & tensile strength; lower compound viscosity; save energy	Rubber, tyre
Crosile® 75	Bis(3-triethoxysilylpropyl)disulfane	56706-10-6	260-350-7	≥98%	Moderate sulfur content, balanced scorch & cure	Rubber, tyre
Crosile® 264	Thiocyanicacid,3-(triethoxysilyl) propylester	34708-08-2	252-161-3	≥98%	Improve filler dispersion; enhance wear & elasticity	Rubber, soles, belts
Crosile® 970	3-Mercaptopropylmethyldimethoxysilane	31001-77-1	250-426-8	≥98%	Better compatibility with mineral-filled elastomers	Rubber, cables
Crosile® 1891	3-Mercaptopropyltriethoxysilane	14814-09-6	238-883-1	≥98%	Enhance vulcanizate physical & mechanical properties	Filler modification, sealants,adhesives
Crosile® 189	3-Mercaptopropyltrimethoxysilane	4420-74-0	224-588-5	≥98%	Improve surface corrosion & oxidation resistance	Rubber, coatings, metal treatment

Sulfur Silane Coupling Agent Application Advantages

Chemical bridging

The alkoxysilane groups react with hydroxyl groups on inorganic filler surfaces, while the sulfur-containing groups participate in the rubber vulcanization network, forming a strong interface between fillers and elastomers.

Property enhancement

Improves tensile strength, tear resistance, abrasion resistance, and overall mechanical performance of rubber compounds.

Processing Improvement

Enhances filler dispersion, reduces compound viscosity, improves processability, and supports efficient mixing operations.

Wide Compatibility

Suitable for NR, SBR, BR, NBR, EPDM, and their blends. Compatible with silica, carbon black, clay, talc, mica, and other reinforcing fillers.

Availability

Available in 200 kg steel drums and 1,000 kg IBCs. Global supply supported by REACH, RoHS, and ISO-compliant quality management systems.

Summary

Crosile® Sulfur Silane Coupling Agents are high-performance additives designed to improve filler-rubber interaction, mechanical properties, and processing efficiency in rubber compounds. They are widely used in tire manufacturing and other demanding rubber applications.

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