Description

Silica, (Dimethylsilyl)Oxy-Modified is a specialized organosilicon-modified silica derivative, engineered to enhance material compatibility and performance. This compound is valued for its ability to impart hydrophobic characteristics and improve dispersion within polymer matrices and coating systems. It is a critical functional additive for industries requiring advanced material properties, such as high-performance elastomers, specialty adhesives, and surface modification applications.

Application

• Silicone Rubber & Elastomers: Acts as a reinforcing and hydrophobic filler to improve mechanical strength, tear resistance, and water repellency.
• Adhesives & Sealants: Enhances rheological properties, provides thixotropy, and improves adhesion to low-surface-energy substrates.
• Coatings & Surface Treatments: Used to create hydrophobic and oleophobic surface coatings, providing stain resistance and easy-clean properties.
• Polymer Composites: Improves filler dispersion, reduces viscosity, and enhances the interfacial bonding between inorganic fillers and organic polymer resins.
• Pharmaceutical & Cosmetic Excipients: Employed as a glidant, anti-caking agent, or viscosity modifier in formulations requiring modified silica.
• Electronics Encapsulation: Provides moisture protection and improved thermal stability in potting compounds and encapsulants for electronic components.

Basic Information

Product Name	Silica, (Dimethylsilyl)Oxy-Modified
CAS No.	102262-28-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Dimethylsilyloxy-modified silica; Hydrophobic silica; Surface-modified silica (dimethylsilyl); Silica, reaction products with dimethylchlorosilane; Hexamethyldisilazane-treated silica; Silylated silica; Fumed silica, silylated; Organosilane-modified silica
EINECS	Contact for details

Quality Control

Our Silica, (Dimethylsilyl)Oxy-Modified is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent performance and purity, meeting the specifications required for industrial and specialty applications. Certificates of Analysis (COA) documenting key parameters such as degree of substitution, moisture content, and particle size distribution are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	White, free-flowing powder
Identification (IR)	Conforms
Assay (as SiO2)	≥ 98.0 %
Loss on Drying	≤ 2.0 %
Carbon Content (TGA)	3.0 - 8.0 %
pH (in aqueous suspension)	5.0 - 7.0
Particle Size (D50)	5 - 20 µm
Specific Surface Area (BET)	100 - 250 m²/g

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