Description

Poly(Phenyl-Methylsilsesquioxane) is a high-performance organosilicon polymer belonging to the silsesquioxane family, characterized by a hybrid inorganic-organic cage-like structure. This compound is engineered to deliver exceptional thermal stability, low dielectric constant, and excellent optical clarity, making it a critical material for advanced technological applications. It is primarily sought after by manufacturers in the electronics, aerospace, and specialty coatings industries seeking to enhance material performance under demanding conditions.

Application

• Advanced Semiconductor Encapsulation: Used as a low-k dielectric material in microelectronic devices to reduce signal delay and crosstalk.
• High-Temperature Resistant Coatings: Serves as a key component in protective coatings for aerospace components and industrial equipment.
• Optical Device Fabrication: Employed in waveguides, lenses, and other optical elements due to its excellent transparency and refractive index control.
• Precision Mold Release Agents: Acts as a high-performance release layer in composite material molding and plastic processing.
• Specialty Additive for Polymers: Incorporated into engineering plastics and resins to improve thermal stability, flame retardancy, and surface properties.
• Nanocomposite Precursor: Utilized as a building block or cross-linking agent for creating hybrid organic-inorganic nanocomposites.

Basic Information

Product Name	Poly(Phenyl-Methylsilsesquioxane)
CAS No.	181186-29-8
Molecular Formula	(C7H8SiO1.5)n
Molecular Weight	Contact for details
Synonyms	Polyphenylmethylsilsesquioxane; PMSSQ; Methylphenyl Silsesquioxane Resin; Phenyl-Methyl Polyhedral Oligomeric Silsesquioxane; Phenylmethyl T8 Silsesquioxane; (Phenylmethylsiloxane)n; Poly(methylphenylsiloxane); Siloxanes and Silicones, di-Me, Ph
EINECS	Contact for details

Quality Control

Our Poly(Phenyl-Methylsilsesquioxane) is manufactured under strict quality management protocols. 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 provided with every shipment to support your quality assurance processes.

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 oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or resin
Identification (IR)	Conforms to structure
Assay (SiO2 Content)	≥ 95.0 %
Volatile Content	≤ 2.0 %
Molecular Weight (Mw)	Customized per grade
Refractive Index (n20D)	~1.53 - 1.55

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