Description

Isobutyltrimethoxysilane is a versatile organosilicon compound widely used as a coupling agent and surface modifier. Its primary value lies in its ability to form strong, durable bonds between inorganic materials and organic polymers, enhancing composite performance. This chemical is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producers of mineral-filled composites and silane-modified polymers.

Application

• Coupling Agent for Composites: Enhances the adhesion and dispersion of mineral fillers (e.g., silica, clay) in polymer matrices like polyethylene, polypropylene, and epoxy resins.
• Surface Treatment for Pigments & Fillers: Imparts hydrophobicity and improves compatibility with organic binders in coatings, inks, and plastics.
• Primer for Adhesives & Sealants: Used to treat glass, metal, or mineral surfaces to promote adhesion of silicone, polyurethane, or MS polymer sealants.
• Crosslinking Agent: Serves as a moisture-curable crosslinker in the production of silane-terminated polymers (STP) for high-performance sealants and adhesives.
• Fiberglass Sizing: Applied as a key component in sizing formulations to improve the interfacial bond between glass fibers and resin in reinforced plastics.
• Water Repellency Agent: Used to treat concrete, masonry, and other porous building materials to provide long-lasting water repellency.
• Intermediate for Synthesis: Acts as a crucial building block for the synthesis of more complex functional silanes and silicone derivatives.

Basic Information

Product Name	Isobutyltrimethoxysilane
CAS No.	18395-30-7
Molecular Formula	C7H18O3Si
Molecular Weight	178.30 g/mol
Synonyms	Trimethoxy(isobutyl)silane; Isobutyltrimethoxysilane; (Isobutyl)trimethoxysilane; Silane, trimethoxy(2-methylpropyl)-; 2-Methylpropyltrimethoxysilane; NSC 93766; Isobutyltrimethoxy silane; Isobutyl-trimethoxysilane
EINECS	242-262-1

Quality Control

Our Isobutyltrimethoxysilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC) for purity and identity verification, to ensure it meets precise specifications and consistent performance for industrial applications. A Certificate of Analysis (COA) detailing all relevant parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, keep the container tightly sealed when not in use and away from moisture, heat, and open flames.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 98.0%
Refractive Index (n20/D)	1.390 - 1.395
Density (20°C)	0.89 - 0.92 g/mL
Water Content (Karl Fischer)	≤ 0.1%

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