Description

(Chloropropyl)Methylsiloxane - Dimethylsiloxane Copolymers are a specialized class of organosilicon compounds that combine the reactivity of chloropropyl groups with the flexibility and stability of a siloxane backbone. This unique structure makes them highly valuable as reactive intermediates and functional modifiers in advanced material synthesis. These copolymers are essential for manufacturers in the silicone, adhesive, and specialty polymer industries seeking to introduce specific functional properties into their final products.

Application

• Reactive Silicone Intermediate: Serves as a key precursor for synthesizing a wide range of functionalized silicones, including amine-, epoxy-, or mercapto-modified polysiloxanes.
• Adhesive & Sealant Formulations: Used as an adhesion promoter and crosslinking agent to enhance bonding strength and durability, particularly on difficult substrates.
• Surface Modification Agent: Imparts hydrophobic, oleophobic, or other tailored surface properties to textiles, fillers, and inorganic materials.
• Polymer Modification: Incorporated into organic polymer chains (e.g., polyurethanes, epoxies) to improve flexibility, thermal stability, and chemical resistance.
• Release Coatings: Acts as a reactive component in the production of durable, high-performance release liners for labels and tapes.
• Rubber & Elastomer Additive: Enhances processing characteristics and final properties of silicone and organic rubbers.

Basic Information

Product Name	(Chloropropyl)Methylsiloxane - Dimethylsiloxane Copolymers
CAS No.	70900-20-8
Molecular Formula	(C6H15ClOSi)x(C2H6OSi)y
Molecular Weight	Varies by copolymer ratio (Contact for details)
Synonyms	Chloropropylmethylsiloxane-Dimethylsiloxane Copolymer; Poly[dimethylsiloxane-co-(3-chloropropyl)methylsiloxane]; Chloropropyl Functional Silicone Fluid; Chloropropyl Modified Polydimethylsiloxane; Siloxanes and Silicones, 3-chloropropyl Me, di-Me; Reactive Chloropropyl Silicone; Chloropropyl Terminated PDMS; Chloropropylmethyl-Dimethyl Copolymeric Siloxane
EINECS	Contact for details

Quality Control

Our (Chloropropyl)Methylsiloxane - Dimethylsiloxane Copolymers are produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including determination of chlorine content, viscosity, and refractive index, to ensure consistency and performance. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance and regulatory compliance needs.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent moisture absorption and potential hydrolysis.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Chloropropyl Content	As per customer grade requirement
Viscosity @ 25°C	Specified range (cSt)
Refractive Index @ 25°C	Specified range
Specific Gravity @ 25°C	Specified range
Water Content (KF)	< 0.1%

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