Description

Siloxanes And Silicones, Di-Me, Polymers With Pr Silsesquioxanes, Ethoxy-Terminated is a specialized organosilicon compound that combines the properties of polydimethylsiloxane (PDMS) with a polyhedral oligomeric silsesquioxane (POSS) core, terminated with reactive ethoxy groups. This unique hybrid structure provides enhanced thermal stability, mechanical reinforcement, and excellent compatibility with various polymer matrices, making it a valuable performance additive. It is primarily used by formulators and material scientists in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in advanced composites and electronics.

Application

• As a reactive modifier and crosslinking agent in high-performance silicone resins and elastomers.
• To enhance the thermal stability and mechanical properties (e.g., modulus, hardness) of epoxy, polyurethane, and acrylic coatings.
• As a compatibilizer and reinforcing nanofiller in advanced polymer composites for aerospace and automotive applications.
• In the formulation of release coatings and pressure-sensitive adhesives (PSAs) with tailored surface properties.
• For improving the dielectric properties and moisture resistance of encapsulants and potting compounds in electronics.
• As a precursor for synthesizing hybrid organic-inorganic materials (ORMOSILs) with tailored nanostructures.

Basic Information

Product Name	Siloxanes And Silicones, Di-Me, Polymers With Pr Silsesquioxanes, Ethoxy-Terminated
CAS No.	189518-95-4
Molecular Formula	Contact for details
Molecular Weight	Variable (Oligomeric mixture)
Synonyms	Ethoxy-Terminated PDMS-POSS Hybrid; Polyhedral Oligomeric Silsesquioxane with Polydimethylsiloxane Arms, Ethoxy-Terminated; POSS-PDMS Ethoxy; Propyl Silsesquioxanes, Polymers with Dimethyl Siloxanes, Ethoxy-Terminated; Reactive POSS-Silicone Hybrid; Organosilicon POSS Macromer; Nanostructured Silicone Resin Precursor
EINECS	Contact for details

Quality Control

Our production of this advanced silicone-POSS hybrid adheres to rigorous quality control protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as ethoxy content, molecular weight distribution, and viscosity are strictly monitored. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with each shipment to support your quality assurance and R&D processes.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature reaction of the ethoxy termini.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Ethoxy Content	Contact for details
Viscosity (25°C)	Contact for details
Specific Gravity (25°C)	Contact for details
Refractive Index (n20D)	Contact for details
Water Content (Karl Fischer)	< 0.5%

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