Description

Chlorine Terminated Polydimethylsiloxane is a specialized organosilicon compound where the polymer chain is capped with reactive chlorine atoms. This unique termination makes it a valuable intermediate for further chemical synthesis, enabling the introduction of siloxane properties into new materials. It is essential for manufacturers in the silicone, polymer, and specialty chemical industries seeking to modify surface properties, create block copolymers, or develop custom release agents and coatings.

Application

• Silicone Intermediate: Acts as a key building block for the synthesis of more complex silicone polymers and copolymers.
• Surface Modification Agent: Used to impart hydrophobic, release, or lubricating properties to various substrates including paper, textiles, and metals.
• Block Copolymer Synthesis: Serves as a macro-initiator or reactive segment for creating silicone-organic hybrid materials with tailored performance.
• Adhesive & Sealant Formulation: Incorporated as a reactive modifier to adjust adhesion, cure characteristics, and flexibility in silicone-based systems.
• Release Coating Production: A precursor for formulating non-stick and easy-release coatings for industrial and food-contact applications.
• Lubricant & Grease Additive: Enhances the thermal stability and lubricity of specialty greases and high-performance lubricants.

Basic Information

Product Name	Chlorine Terminated Polydimethylsiloxane
CAS No.	67923-13-1
Molecular Formula	(C2H6OSi)n•Cl2 (Representative)
Molecular Weight	Varies by chain length (n)
Synonyms	Chlorosilane-terminated PDMS; Chloropropyl-terminated Polydimethylsiloxane; α,ω-Dichloro Polydimethylsiloxane; Dimethylsiloxane, chloro-terminated; Polydimethylsiloxane, chloropropyl terminated; PDMS, chlorine terminated; Reactive Silicone Fluid; Chlorinated Silicone Oil
EINECS	Contact for details

Quality Control

Our Chlorine Terminated Polydimethylsiloxane is manufactured under strict quality management systems. Each batch is analyzed to ensure consistent chlorine content, viscosity, and molecular weight distribution, which are critical for predictable downstream reactivity. Comprehensive Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive). Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and sources of ignition. Use under an inert atmosphere (e.g., nitrogen) for extended storage or handling to prevent hydrolysis and maintain reactivity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade (cSt)
Chlorine Content	Specified grade (% w/w)
Water Content	< 0.1% (Karl Fischer)
Specific Gravity (25°C)	0.95 - 1.05
Refractive Index (25°C)	1.400 - 1.410

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