Description

3-Glycidoxypropyldimethylmethoxysilane is a highly versatile organofunctional silane coupling agent featuring both epoxy and alkoxysilane groups. This dual functionality is critical for creating strong, durable bonds between inorganic materials and organic polymers, significantly enhancing composite performance. It is essential for manufacturers in the coatings, adhesives, sealants, and advanced composite materials industries seeking to improve adhesion, mechanical strength, and environmental resistance in their products.

Application

• Adhesion Promoter: Primarily used to dramatically improve the adhesion of epoxy, polyurethane, and acrylic-based coatings, adhesives, and sealants to glass, metal, and mineral surfaces.
• Fiberglass & Composite Reinforcement: A key sizing agent for glass fibers and mineral fillers, enhancing the interfacial bond with polymer matrices (e.g., epoxy, polyester) to produce stronger, more durable composites.
• Surface Modification: Used to functionalize silica, alumina, and other inorganic nanoparticles to improve their dispersion and compatibility in organic resins and rubbers.
• Crosslinking Agent: Serves as a co-monomer or crosslinker in silicone-modified organic polymers, contributing to network formation and improved thermal and chemical resistance.
• Waterborne System Component: Employed in the formulation of water-based coatings and adhesives to enhance wet adhesion and corrosion protection on metallic substrates.
• Electronic Encapsulants & Potting: Used in epoxy formulations for electronic encapsulation to ensure robust adhesion to components and substrates, protecting against moisture and thermal stress.

Basic Information

Product Name	3-Glycidoxypropyldimethylmethoxysilane
CAS No.	100303-57-9
Molecular Formula	C9H20O3Si
Molecular Weight	204.34 g/mol
Synonyms	Glycidoxypropyldimethylmethoxysilane; (3-Glycidoxypropyl)dimethylmethoxysilane; Dimethylmethoxy(3-glycidoxypropyl)silane; γ-Glycidoxypropylmethyldimethoxysilane (common naming variation); Silane, (3-glycidoxypropyl)dimethylmethoxy-; GLYMO (common abbreviation); Dow Corning Z-6040 (a major trade name); Momentive Silquest A-187 (a major trade name)
EINECS	Contact for details

Quality Control

Our production of 3-Glycidoxypropyldimethylmethoxysilane adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed against rigorous internal specifications, which typically include assay, purity by GC, epoxy content, and moisture (Karl Fischer). A Certificate of Analysis (COA) documenting these results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain product integrity. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Assay (GC)	≥ 97.0%
Epoxy Value	Contact for details
Refractive Index (n20/D)	~1.428 - 1.432
Density (25°C)	~0.97 - 1.00 g/mL
Water Content (Karl Fischer)	≤ 0.5%

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