Description

2-Methyl-3-(Triethoxysilyl)Propanethiol CAS NO 17980-28-8 is a specialized organosilane coupling agent featuring both a triethoxysilyl group and a thiol (-SH) functionality. This dual functionality makes it a critical component for modifying surfaces and enhancing the adhesion between inorganic materials and organic polymers. It is primarily utilized in the rubber, adhesive, and advanced composite materials industries where durable, high-performance bonding is required.

Application

• Rubber Reinforcement: Acts as a key coupling agent in silica-filled rubber compounds (e.g., for tire treads) to improve filler dispersion, reduce rolling resistance, and enhance mechanical properties.
• Adhesive & Sealant Formulations: Improves the adhesion of polysulfide and polyurethane-based sealants and adhesives to glass, metal, and mineral surfaces.
• Surface Modification: Used to treat glass fibers, minerals, and metal oxides to create a hydrophobic, organophilic surface for better compatibility with polymer matrices.
• Composite Materials: Enhances the interfacial bonding in fiber-reinforced plastics (FRP) and mineral-filled thermoplastics, leading to improved strength and durability.
• Coatings & Inks: Serves as an adhesion promoter in specialty coatings and printing inks for difficult-to-bond substrates.

Basic Information

Product Name	2-Methyl-3-(Triethoxysilyl)Propanethiol
CAS No.	17980-28-8
Molecular Formula	C10H24O3SSi
Molecular Weight	252.45 g/mol
Synonyms	3-(Triethoxysilyl)-2-methyl-1-propanethiol; (3-Mercapto-2-methylpropyl)triethoxysilane; 2-Methyl-3-mercaptopropyltriethoxysilane; Mercaptosilane; Si 363; Silane coupling agent Si 363; Triethoxy(2-methyl-3-mercaptopropyl)silane; 3-Triethoxysilyl-2-methylpropanethiol
EINECS	Contact for details

Quality Control

Our production of 2-Methyl-3-(Triethoxysilyl)Propanethiol adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including GC and titration methods, to ensure consistent purity and performance. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C) under an inert atmosphere (e.g., nitrogen) to prevent oxidation and moisture absorption. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.430 - 1.440
Density (g/mL, 20°C)	0.950 - 0.980

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