Description

Silane, Dichlorodimethyl-, Reaction Products With Silica is a specialized organosilicon compound, a key surface-modifying agent derived from the reaction of dichlorodimethylsilane with silica. This product is engineered to impart hydrophobic properties and enhance compatibility between inorganic fillers and organic polymer matrices. It is essential for manufacturers in the composites, adhesives, and coatings industries seeking to improve material performance, processing, and durability.

Application

• Polymer Composites: Acts as a coupling agent to improve the dispersion and interfacial adhesion of silica and other mineral fillers in thermoset and thermoplastic resins, enhancing mechanical strength and moisture resistance.
• Rubber Reinforcement: Used in silicone rubber and other elastomer formulations to modify precipitated or fumed silica, leading to improved tensile strength, tear resistance, and processing characteristics.
• Adhesives & Sealants: Functions as an adhesion promoter and rheology modifier, increasing bond strength to various substrates and providing better stability in moisture-curing systems.
• Coatings & Inks: Imparts water repellency, improves pigment wetting and dispersion, and enhances the scratch and chemical resistance of final films.
• Pharmaceutical & Cosmetic Excipients: Utilized to modify the surface of colloidal silica for use as a glidant or anti-caking agent, improving flow properties in powder formulations.
• Electronics Encapsulation: Enhances the performance of silica-filled epoxy molding compounds (EMCs) by reducing moisture absorption and improving thermal stability for semiconductor protection.

Basic Information

Product Name	Silane, Dichlorodimethyl-, Reaction Products With Silica
CAS No.	68611-44-9
Molecular Formula	Complex mixture; based on (CH3)2SiCl2 and SiO2
Molecular Weight	Contact for details
Synonyms	Dimethyldichlorosilane reaction products with silica; Silica, reaction products with dichlorodimethylsilane; Hydrophobic silica; Treated silica; Surface-modified silica; DDS-modified silica; Organosilane-treated silica; Silane-treated funnel silica
EINECS	Contact for details

Quality Control

Our production of Silane, Dichlorodimethyl-, Reaction Products With Silica adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as degree of surface treatment, hydrophobic character, and chemical composition. Certificates of Analysis (COA) documenting these specifications are provided with every shipment to guarantee reliable performance in your formulations.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after initial use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms to structure
Loss on Drying	≤ 2.0 %
Silica Content (as SiO2)	Contact for details
Carbon Content (by CHNS)	Contact for details
Chloride Content	≤ 1.0 %
pH (in aqueous suspension)	4.0 - 7.0
Bulk Density	Contact for details

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