Description

Ethylsilsesquioxane is a hybrid inorganic-organic polymer belonging to the silsesquioxane family, characterized by its cage-like structure with ethyl functional groups. This compound is valued for its ability to enhance thermal stability, mechanical strength, and hydrophobicity when incorporated into various material matrices. It is a critical raw material for advanced material scientists and engineers in the coatings, electronics, and specialty polymer industries seeking to develop high-performance composites.

Application

• As a reinforcing nanofiller in high-temperature resistant polymer composites and engineering plastics.
• Key precursor for synthesizing hybrid organic-inorganic materials with tailored dielectric properties for microelectronics and semiconductor encapsulation.
• Modifier for surface coatings to impart exceptional water repellency (hydrophobicity), chemical resistance, and anti-corrosive properties.
• Building block for advanced sol-gel processes to create porous materials, catalysts, and membranes with controlled architecture.
• Additive in silicone resins and rubbers to improve thermal oxidative stability and mechanical performance.
• Component in the formulation of low-k dielectric materials for next-generation integrated circuits.
• Used in the development of specialty adhesives and sealants requiring enhanced environmental durability.
• Research and development of novel nanomaterials for optics, sensors, and biomedical applications.

Basic Information

Product Name	Ethylsilsesquioxane
CAS No.	67763-04-6
Molecular Formula	(C2H5SiO1.5)n
Molecular Weight	Variable (Oligomeric mixture)
Synonyms	Poly(ethylsilsesquioxane); Ethyl-POSS; Ethyl Tn Resin; Ethylsilsequioxane Resin; Octa(ethyl)silsesquioxane (for specific cage structures); Ethyl-substituted POSS; ESO; Ethyl-T8 POSS
EINECS	Contact for details

Quality Control

Our Ethylsilsesquioxane is manufactured under strict quality management protocols. Each batch is characterized using advanced analytical techniques including FT-IR, NMR, and GPC/SEC to confirm structural integrity, composition, and molecular weight distribution. We provide comprehensive Certificates of Analysis (COA) with every shipment, detailing purity, residual solvent content, and other critical parameters to ensure batch-to-batch consistency and compliance with your technical requirements.

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 hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent moisture absorption and potential condensation, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white powder or solid
Identification (IR)	Conforms to structure
Assay (Si Content)	> 95%
Ethyl Group Content	Contact for details
Molecular Weight (GPC/SEC, Mn)	Specified per grade
Loss on Drying	< 2.0%
Residual Solvent (GC)	< 0.5%

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