Description

Poly(2-Chloroethylsilsesquioxane) is a functionalized silsesquioxane polymer featuring reactive chloromethyl groups on an inorganic silica-like cage structure. This unique hybrid architecture combines the thermal stability and mechanical robustness of ceramics with the processability and reactivity of organic polymers. It serves as a critical precursor or additive for advanced materials requiring enhanced surface properties, cross-linking capability, or inorganic-organic compatibility. Key industrial users include manufacturers of specialty coatings, high-performance composites, and tailored silica-based materials for electronics and aerospace applications.

Application

• Surface Modification Agent: Imparts hydrophobic, oleophobic, or specific adhesion properties to glass, metals, and polymers.
• Precursor for Hybrid Materials: Serves as a building block for synthesizing organic-inorganic hybrid (OIH) polymers and nanocomposites with tailored properties.
• Cross-Linking Agent: Used in the formulation of heat-resistant and chemically stable silicone resins, elastomers, and coatings.
• Adhesion Promoter: Enhances the bonding between organic matrices (e.g., epoxies, polyimides) and inorganic substrates or fillers.
• Dielectric Materials: Incorporated into low-k dielectric films and encapsulants for microelectronic packaging.
• Catalyst Support: Functionalized silica cage provides a stable platform for immobilizing transition metal catalysts.
• Flame-Retardant Additive: Contributes to the flame retardancy of polymers by promoting char formation.

Basic Information

Product Name	Poly(2-Chloroethylsilsesquioxane)
CAS No.	188969-12-2
Molecular Formula	(C2H4ClSiO1.5)n
Molecular Weight	Variable (Polymer)
Synonyms	2-Chloroethylsilsesquioxane polymer; Poly(chloroethylsilsesquioxane); Chloroethyl POSS; Chloroethyl Polyhedral Oligomeric Silsesquioxane; Chloromethyl-functionalized silsesquioxane; Inorganic-organic hybrid polymer with chloroethyl groups; POSS-(CH2CH2Cl)x; Octa(chloroethyl)silsesquioxane (for specific cage structure)
EINECS	Contact for details

Quality Control

Our Poly(2-Chloroethylsilsesquioxane) is manufactured under a strict quality management system. Each batch is characterized to ensure consistency in key parameters such as chlorine content, molecular weight distribution, and functional group density. Certificates of Analysis (COA) detailing specifications and test results 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). This material is moisture-sensitive (hygroscopic); keep the container tightly sealed under an inert atmosphere such as nitrogen or argon to prevent hydrolysis and maintain reactivity. Isolate from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or viscous liquid
Identification (IR)	Conforms to structure
Chlorine Content	Contact for details
Assay (Functional Group)	≥ 95%
Molecular Weight (GPC)	Specified range available
Solubility	Soluble in common organic solvents (e.g., THF, toluene)
Residue on Ignition	Contact for details

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