Description

Bis(Ethoxy)Methoxy(2-Methylpropyl)Silane CAS NO 70776-21-5 is a specialized organosilicon compound, a silane coupling agent characterized by its unique alkoxy and alkyl functional groups. This chemical is engineered to act as a versatile surface modifier and adhesion promoter, creating strong bonds between inorganic materials and organic polymers. It is a critical raw material for manufacturers in the coatings, adhesives, sealants, and advanced composite materials industries seeking to enhance product performance and durability.

Application

• As a coupling agent in mineral-filled composites (e.g., fiberglass, silica-filled rubber) to improve mechanical strength and moisture resistance.
• A key intermediate or surface treatment agent in the formulation of high-performance silicone resins and hybrid coatings.
• Used in the production of adhesives and sealants to promote adhesion to difficult substrates like metals, glass, and ceramics.
• As a modifying agent for fillers and pigments to enhance their dispersion and compatibility in polymer matrices.
• Potential use in the synthesis of specialized silicon-based precursors for materials science and electronics applications.
• Employed in water repellent treatments for construction materials and stone.

Basic Information

Product Name	Bis(Ethoxy)Methoxy(2-Methylpropyl)Silane
CAS No.	70776-21-5
Molecular Formula	C9H22O3Si
Molecular Weight	206.36 g/mol
Synonyms	1-(Methoxy)-1-(diethoxy)-2-methylpropylsilane; (2-Methylpropyl)methoxydiethoxysilane; Isobutylmethoxydiethoxysilane; Diethoxy(methoxy)(2-methylpropyl)silane; Silane, diethoxy(methoxy)(2-methylpropyl)-; 2-Methylpropylmethoxydiethoxysilane; Methoxydiethoxysilyl-2-methylpropane
EINECS	Contact for details

Quality Control

Our production of Bis(Ethoxy)Methoxy(2-Methylpropyl)Silane adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including GC, NMR, and Karl Fischer titration, to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing all specifications are provided with each shipment to guarantee supply reliability and traceability for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Density (20°C)	0.88 - 0.92 g/mL
Refractive Index (n20D)	1.395 - 1.405

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