Description

Poly(Phenylsilsesquioxane) is a high-performance inorganic-organic hybrid polymer characterized by a cage-like structure of silicon and oxygen with pendant phenyl groups. This unique architecture provides exceptional thermal stability, low dielectric constant, and outstanding optical clarity, making it a critical material for advanced engineering applications. It is essential for industries requiring materials that maintain performance under extreme thermal and electrical stress.

Application

• As a high-temperature resin and binder for advanced ceramic precursors and composites.
• As a key component in the formulation of high-performance, thermally stable protective coatings.
• As a dielectric material in microelectronics and semiconductor packaging for its low-k properties.
• As a modifier for epoxy and silicone resins to enhance their thermal and mechanical properties.
• In the production of specialty optical materials and lenses due to its high transparency and refractive index.
• As a precursor for silicon oxycarbide (SiOC) ceramics via pyrolysis.
• In aerospace applications for heat-resistant adhesives and matrix materials.

Basic Information

Product Name	Poly(Phenylsilsesquioxane)
CAS No.	70131-69-0
Molecular Formula	(C6H5SiO1.5)n
Molecular Weight	Variable (Oligomer to Polymer)
Synonyms	Polyphenylsilsesquioxane; Phenyl T-Structure Siloxane; Phenylsilsesquioxane Resin; Phenyl-SSQ; PPSQ; Polyphenylsesquisiloxane; Silsesquioxane, phenyl-; Toluene-soluble polyphenylsilsesquioxane
EINECS	Contact for details

Quality Control

Our Poly(Phenylsilsesquioxane) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency in molecular weight distribution, purity, and functional performance. Certificates of Analysis (COA) detailing key parameters are available upon request to support your quality assurance protocols.

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). Keep away from strong alkalis and incompatible organic solvents. The material is typically stable under these conditions for extended periods.

Specification

Item	Specification
Appearance	White to off-white powder or solid
Identification (IR)	Conforms to structure
Phenyl Content	Contact for details
Weight Average Molecular Weight (Mw)	Grade dependent
Volatiles (Loss on Drying)	< 2.0 %
Solubility (in Toluene)	Complete, clear solution

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