Description

Siloxanes And Silicones, Dimethyl, Diphenyl, Polymers With Phenylsilsesquioxanes is a high-performance, specialty silicone copolymer engineered for demanding thermal and mechanical environments. This advanced material matters because it combines the flexibility and stability of dimethyl siloxanes with the enhanced thermal resistance and refractive properties imparted by diphenyl and phenylsilsesquioxane units. Industries requiring durable, heat-resistant, and optically clear materials, such as advanced electronics, aerospace, and high-temperature LED encapsulation, rely on this polymer for critical applications.

Application

• High-Temperature Resistant Encapsulants & Potting Compounds for power electronics, automotive sensors, and aerospace components.
• Optical Grade Silicone Gels & Lenses for high-brightness LED packaging, where thermal stability and clarity are paramount.
• Thermal Interface Materials (TIMs) and gap fillers in computing and telecommunications hardware.
• Release Coatings & Mold-Making Materials for composites and plastics processing under elevated temperatures.
• Specialty Additives for Plastics and Coatings to improve heat resistance, weatherability, and surface properties.
• Base Polymer for Advanced Silicone Resins used in protective and decorative finishes.

Basic Information

Product Name	Siloxanes And Silicones, Dimethyl, Diphenyl, Polymers With Phenylsilsesquioxanes
CAS No.	68648-59-9
Molecular Formula	Contact for details
Molecular Weight	Varies by grade and polymerization degree
Synonyms	Dimethyl, Diphenyl Siloxane Copolymer with Phenylsilsesquioxane; Phenylsilsesquioxane-Dimethyl Diphenyl Siloxane Copolymer; Methyl Phenyl Silicone Resin; Phenyl Modified Silicone Fluid; Diphenyl Dimethyl Polysiloxane Copolymer; Phenyl T Resin; Silsesquioxane-Siloxane Hybrid Polymer
EINECS	Contact for details

Quality Control

Our production of Siloxanes And Silicones, Dimethyl, Diphenyl, Polymers With Phenylsilsesquioxanes adheres to a stringent quality management system. Each batch undergoes rigorous analytical testing, including viscosity, refractive index, phenyl content, and thermal stability analysis, to ensure consistency and performance. Certificates of Analysis (COA) documenting all key parameters are available upon request to support your quality assurance and regulatory compliance needs.

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 and heat sources to maintain product integrity.

Specification

Item	Specification
Appearance	Clear, viscous liquid to resinous solid
Viscosity (25°C)	Tailored per grade
Refractive Index (n20D)	1.45 - 1.55
Phenyl Content	Tailored per grade
Volatile Matter	< 2.0%
Thermal Stability	Stable up to 250-300°C

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