Description

Phenylsilsesquioxanes, Hydrogen-Terminated is a specialized organosilicon compound belonging to the silsesquioxane family, characterized by a cage-like structure with phenyl groups and reactive Si-H termini. This unique molecular architecture provides a valuable combination of thermal stability, low dielectric constant, and versatile reactivity, making it a critical precursor for advanced materials. It is essential for manufacturers and R&D teams in the electronics, aerospace, and high-performance coatings sectors seeking to enhance the properties of polymers, resins, and nanocomposites.

Application

• Advanced Polymer Modification: Acts as a reactive crosslinker or building block for synthesizing high-performance hybrid organic-inorganic polymers (polyhedral oligomeric silsesquioxanes - POSS) with enhanced thermal and mechanical properties.
• Low-k Dielectric Materials: A key precursor for spin-on dielectric films in semiconductor manufacturing, enabling reduced signal delay and crosstalk in microelectronic devices.
• Heat-Resistant Coatings & Resins: Used to formulate protective coatings, adhesives, and composite matrices for aerospace and automotive applications requiring exceptional thermal oxidative stability.
• Surface Functionalization: The reactive Si-H bonds allow for grafting onto various substrates (e.g., silica, metals) to modify surface properties like hydrophobicity, adhesion, and corrosion resistance.
• Nanocomposite Reinforcement: Serves as a nanoscale filler to reinforce engineering plastics, silicones, and epoxies, improving their dimensional stability and flame retardancy.
• Specialty Silicone Synthesis: Employed as an intermediate in the production of phenyl-modified silicone fluids, rubbers, and resins with specific optical and thermal characteristics.

Basic Information

Product Name	Phenylsilsesquioxanes, Hydrogen-Terminated
CAS No.	68952-30-7
Molecular Formula	Typically represented as (C6H5SiO1.5)n(H)n; specific formula varies with cage size (e.g., T8, T10, T12).
Molecular Weight	Variable, depending on the degree of oligomerization (n). Contact for details on specific grades.
Synonyms	Hydrogen-Terminated Phenyl POSS; Phenyl T-Silsesquioxane, Hydride; Poly(phenylsilsesquioxane) hydride; Hydridophenylsilsesquioxane; Phenyl-H-POSS; Octahydridooctaphenylsilsesquioxane (for T8 cage); Incompletely Condensed Phenylsilsesquioxane with Si-H; Phenyl Silsequioxane Resin with Hydride functionality.
EINECS	Contact for details.

Quality Control

Our Phenylsilsesquioxanes, Hydrogen-Terminated is manufactured under strict quality protocols. Each batch undergoes rigorous analytical testing to ensure consistency in composition, reactivity, and purity. Key parameters monitored include Si-H content, degree of condensation, and residual solvents. A comprehensive Certificate of Analysis (COA) detailing assay results is provided with every shipment to guarantee compliance with your specifications and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C) under an inert atmosphere (e.g., nitrogen or argon) due to its moisture-sensitive and easily oxidized nature. Keep away from heat, open flames, and incompatible materials such as strong oxidizers, acids, and bases.

Specification

Item	Specification
Appearance	White to off-white powder or resinous solid
Identification (IR)	Conforms to structure (Si-H, Si-O-Si, phenyl peaks)
Assay (Si-H Content)	Contact for details
Phenyl Content	Contact for details
Volatile Matter	< 1.0%
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.