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

Functional sulfur-containing silanes are widely used in rubber processing, adhesives, composite materials, metal surface treatment, construction waterproofing, etc. Sulfur silanes—whose main functional group is sulfur—are the most widely used functional silanes. In the rubber industry they effectively enhance the bond between carbon black fillers and rubber molecules and promote vulcanization. They also function as coupling agents, accelerators and vulcanizing agents, and have become essential raw materials for radial tire production.

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: sulfur reacts with inorganic surfaces (silica, glass, metals) while organo-functional groups bond to polymers, creating strong covalent links.
Property boost: markedly higher tensile & tear strength, abrasion resistance, and lower compression set.
Processing aid: reduces compound viscosity, shortens mixing time, lowers energy consumption.
Versatility: suitable for NR, SBR, BR, NBR, EPDM and their blends; compatible with silica, clay, talc, mica, carbon black.

Typical Dosage

1.0–4.0 phr (parts per hundred rubber); fine-tune according to filler type and performance target.

Availability

All grades supplied in 200 kg steel drums or 1,000 kg IBCs; global shipping with REACH, RoHS, and ISO-certified quality management.

In summary, Crosile® sulfur silanes are high-purity (≥ 98 %), high-performance coupling agents that improve mechanical properties, adhesion, and processing of rubber compounds, making them ideal for premium tire and rubber articles.

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