Description

Siloxanes And Silicones, Di-Me, Me Vinyl, Polymers With Me Ph Silsesquioxanes is a specialized organosilicon copolymer that combines the properties of polydimethylsiloxane (PDMS) with vinyl functionality and methyl phenyl silsesquioxane (POSS) cage structures. This unique hybrid architecture provides enhanced thermal stability, mechanical reinforcement, and improved compatibility with organic matrices compared to standard silicones. It is primarily sought after by formulators in the advanced materials sector who require high-performance additives for coatings, composites, and electronic encapsulants to solve challenges related to heat resistance, dielectric properties, and surface modification.

Application

• High-Temperature Resistant Coatings: Used as a key modifier in protective coatings for aerospace, automotive, and industrial equipment to improve thermal stability and weatherability.
• Electronic Encapsulation & Potting Compounds: Enhances the dielectric properties, moisture resistance, and thermal management of materials used to protect sensitive electronic components.
• Reinforced Silicone Elastomers & Composites: Acts as a cross-linking agent and reinforcing filler to improve the tensile strength, tear resistance, and heat deflection temperature of silicone rubbers and composite materials.
• Adhesives & Sealants: Imparts flexibility, adhesion, and durability to high-performance formulations used in construction, automotive assembly, and gasket manufacturing.
• Release Agents & Surface Modifiers: Provides non-stick properties and surface energy modification in molding applications for plastics, rubber, and composite parts.
• Optical & LED Packaging Materials: Utilized for its clarity, thermal stability, and UV resistance in lenses, light guides, and encapsulants for optoelectronic devices.

Basic Information

Product Name	Siloxanes And Silicones, Di-Me, Me Vinyl, Polymers With Me Ph Silsesquioxanes
CAS No.	68037-69-4
Molecular Formula	Complex Copolymer (Contact for details)
Molecular Weight	Varies by grade (Contact for details)
Synonyms	Vinylmethylsiloxane-dimethylsiloxane copolymer with methylphenylsilsesquioxane; Poly(dimethylsiloxane-co-methylvinylsiloxane) grafted with methyl phenyl POSS; POSS-modified vinyl silicone copolymer; Methyl phenyl silsesquioxane-polydimethylsiloxane vinyl copolymer; Vinyl-functionalized PDMS-POSS hybrid; Organosilicon POSS copolymer; Reactive silicone-POSS resin; Silicone hybrid resin with vinyl and phenyl groups
EINECS	Contact for details

Quality Control

Our production of this advanced silicone-POSS hybrid adheres to rigorous quality control protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as vinyl content, molecular weight distribution, viscosity, and thermal stability are monitored using advanced analytical techniques including GPC, NMR, and TGA. Certificates of Analysis (COA) detailing all relevant specifications are provided with each shipment 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 heat sources and open flames. Under these conditions, the product is stable for extended periods.

Specification

Item	Specification
Appearance	Clear viscous liquid to translucent solid
Viscosity (25°C)	Varies by grade (e.g., 500 - 50,000 cSt)
Vinyl Content (mol%)	Contact for details
Non-volatile Matter (%)	> 98.0
Specific Gravity (25°C)	0.98 - 1.10
Refractive Index (25°C)	1.40 - 1.46
Thermal Decomposition Onset	> 300°C (by TGA)

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