Description

Bis(3-Chloroisobutyl)Tetramethyldisiloxane is a specialized organosilicon compound featuring a disiloxane backbone with chloroisobutyl functional groups. This unique structure makes it a valuable intermediate for the synthesis of advanced silicone polymers and functional materials. It is primarily sought after by manufacturers in the silicone industry, particularly for applications requiring specific chemical reactivity or tailored surface properties.

Application

• Silicone Polymer Modification: Acts as a key monomer or chain extender for introducing reactive chloroisobutyl groups into silicone copolymers, altering their physical and chemical properties.
• Surface Treatment Agent: Used in the formulation of primers and adhesion promoters for coatings, sealants, and adhesives on difficult-to-bond substrates.
• Intermediate for Specialty Silanes: Serves as a precursor for the synthesis of other functional organosilanes through further chemical reactions at the chloroalkyl sites.
• Crosslinking Agent: Employed in the production of crosslinked silicone elastomers and resins, where it contributes to network formation and property enhancement.
• Lubricant and Grease Additive: Incorporated into high-performance silicone-based lubricants to improve thermal stability and load-bearing characteristics.
• Research & Development: Utilized in academic and industrial R&D for exploring new organosilicon chemistry and material science applications.

Basic Information

Product Name	Bis(3-Chloroisobutyl)Tetramethyldisiloxane
CAS No.	18388-70-0
Molecular Formula	C12H28Cl2OSi2
Molecular Weight	323.43 g/mol
Synonyms	1,3-Bis(3-chloro-2-methylpropyl)-1,1,3,3-tetramethyldisiloxane; Tetramethylbis(3-chloro-2-methylpropyl)disiloxane; 1,1,3,3-Tetramethyl-1,3-bis(3-chloro-2-methylpropyl)disiloxane; Disiloxane, 1,3-bis(3-chloro-2-methylpropyl)-1,1,3,3-tetramethyl-; Bis(3-chloro-2-methylpropyl)tetramethyldisiloxane; (3-Chloro-2-methylpropyl)tetramethyldisiloxane (mixture of isomers)
EINECS	242-245-5

Quality Control

Our production of Bis(3-Chloroisobutyl)Tetramethyldisiloxane adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing to ensure consistency, purity, and compliance with agreed specifications. A Certificate of Analysis (COA) detailing key parameters is provided with every shipment to guarantee traceability and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong acids and bases. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Density (at 20°C)	~1.00 g/cm³
Refractive Index (n20D)	~1.440

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