Description

Silsesquioxanes CAS NO 67763-03-5 represent a versatile class of hybrid inorganic-organic materials with the general formula (RSiO1.5)n, where R is an organic group. These compounds are highly valued for their unique cage-like or ladder structures, which combine the thermal stability and mechanical strength of silica with the processability and functionality of organic polymers. They are essential for advanced material scientists and engineers seeking to enhance the performance of coatings, composites, and electronic materials. Key industries that utilize these high-performance additives include aerospace, microelectronics, and specialty chemicals.

Application

• High-Performance Coatings & Resins: Used as cross-linking agents and property modifiers to improve scratch resistance, thermal stability, and weatherability in automotive, industrial, and protective coatings.
• Advanced Composites & Nanocomposites: Act as nanoscale reinforcing fillers to enhance mechanical strength, reduce thermal expansion, and improve dimensional stability in polymer matrices.
• Electronics & Semiconductor Packaging: Employed as low-k dielectric materials in microelectronic devices and as encapsulants to provide superior insulation and thermal management.
• Specialty Adhesives & Sealants: Impart enhanced adhesion, flexibility, and durability to high-temperature and demanding environment formulations.
• Optical & Photonic Materials: Serve as precursors for transparent, high-refractive-index films and waveguides used in LEDs, sensors, and optical devices.
• Catalyst & Catalyst Supports: Functionalized silsesquioxanes provide well-defined, tunable platforms for heterogeneous catalysis and immobilization of active sites.
• Personal Care & Cosmetics: Certain derivatives are used to improve texture, film-forming, and sensory properties in premium cosmetic formulations.
• Biomedical Materials: Explored for drug delivery systems, dental composites, and bioactive scaffolds due to their biocompatibility and tailorable surface chemistry.

Basic Information

Product Name	Silsesquioxanes
CAS No.	67763-03-5
Molecular Formula	(RSiO1.5)n (Variable)
Molecular Weight	Variable (Contact for details)
Synonyms	Polyhedral Oligomeric Silsesquioxane (POSS); POSS® Cage; Organosilsesquioxane; Tn Resins; Inorganic-Organic Hybrid; Siloxane-Silsesquioxane Resins; SSQ; RSQ; RSiO1.5
EINECS	Contact for details

Quality Control

Our Silsesquioxanes are manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent composition, purity, and performance. Key parameters monitored include cage structure integrity, organic functional group content, and residual solvent levels. Certificates of Analysis (COA) detailing specific test results are provided with every shipment to guarantee 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 away from strong acids, strong bases, and oxidizing agents to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder or viscous liquid
Identification (IR)	Conforms to structure
Assay (NMR/TGA)	≥ 95% (Cage Content)
Functional Group Content	As per customer grade
Volatile Content	≤ 2.0%
Solubility	Soluble in common organic solvents (e.g., Toluene, THF)

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