Description

Silsesquioxanes, Ph, Vinyl Group-Terminated CAS NO 68957-07-3 is a specialized organosilicon compound belonging to the polyhedral oligomeric silsesquioxane (POSS) family, featuring a hybrid inorganic-organic cage structure with phenyl groups and reactive vinyl terminations. This unique architecture provides exceptional thermal stability and enables covalent integration into polymer matrices, significantly enhancing material properties. It is a critical performance additive for advanced material scientists and formulators in the high-performance coatings, specialty composites, and electronics encapsulation sectors seeking to improve heat resistance, mechanical strength, and dielectric performance.

Application

• High-Temperature Resistant Coatings: Used as a cross-linking agent and reinforcing nanofiller in protective coatings for aerospace, automotive, and industrial equipment to enhance thermal stability and abrasion resistance.
• Advanced Polymer Composites: Serves as a nano-reinforcement in epoxy, silicone, and other thermoset resins to create lightweight, high-strength composites with improved modulus and heat deflection temperature for automotive and structural components.
• Electronics Encapsulation & Underfills: Incorporated into formulations for semiconductor packaging and LED encapsulation to provide superior dielectric properties, reduced thermal stress, and enhanced moisture barrier performance.
• Specialty Adhesives & Sealants: Enhances the thermal and mechanical properties of high-performance adhesives and sealants used in demanding environments, improving bond strength and longevity.
• Flame Retardant Additives: Acts as a synergist in flame-retardant polymer systems, promoting char formation and improving thermal shielding properties without compromising processability.
• Optical and Photonic Materials: Utilized in the development of optical resins and waveguide materials due to its ability to tailor refractive index and reduce thermal expansion.

Basic Information

Item	Detail
Product Name	Silsesquioxanes, Ph, Vinyl Group-Terminated
CAS No.	68957-07-3
Molecular Formula	Typically represented as (C6H5SiO1.5)n(C2H3SiO1.5)m (Cage structure varies)
Molecular Weight	Variable (dependent on cage size and substitution ratio)
Synonyms	Vinyl-POSS; Phenyl Vinyl POSS; Polyhedral Oligomeric Silsesquioxane with Phenyl and Vinyl Groups; Octavinyl Octaphenyl Silsesquioxane; Vinyl-Functionalized Phenyl Silsesquioxane; POSS Cage Hybrid; Inorganic-Organic Hybrid Nanomaterial; Nanostructured Chemicals
EINECS	Contact for details

Quality Control

Our Silsesquioxanes, Ph, Vinyl Group-Terminated is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent composition, purity, and functional group integrity. Key parameters monitored include vinyl content, cage structure verification, and residual solvent levels. Certificates of Analysis (COA) detailing specifications and test results are provided with every shipment 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). This material is light-sensitive (store away from light). Keep away from heat sources and incompatible materials. For long-term storage under inert atmosphere, please contact us for specific recommendations.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to reference spectrum
Vinyl Content	≥ Specified value (Contact for details)
Phenyl Content	≥ Specified value (Contact for details)
Purity (HPLC/GPC)	≥ 95% (Cage structure)
Residual Solvent	< 0.5%
Melting Point	Specified range

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