Description

Dimethylsiloxane, Methyl Phenyl Methyl Vinyl Hydroxy-Term. is a specialized, multi-functional silicone fluid characterized by its hydroxy-terminated structure and the presence of methyl, phenyl, and vinyl substituents. This unique combination of reactive end groups and side chains makes it a versatile intermediate for creating high-performance silicone polymers with enhanced thermal stability, flexibility, and compatibility. It is essential for formulators and manufacturers in the advanced materials sector seeking to develop custom elastomers, release coatings, and high-temperature resistant sealants. The compound is supplied under strict quality control to ensure batch-to-batch consistency for industrial applications.

Application

• Silicone Rubber & Elastomer Manufacturing: Acts as a key reactive intermediate or chain extender in the production of high-consistency rubber (HCR) and liquid silicone rubber (LSR) for automotive, aerospace, and medical components.
• High-Temperature & Flame-Retardant Coatings: Used in formulating specialty release coatings, protective paints, and encapsulants where phenyl groups contribute to superior thermal and oxidative stability.
• Pressure-Sensitive Adhesives (PSAs): Incorporated to modify adhesion, cohesion, and tack properties in silicone-based adhesive tapes and labels.
• Sealants & Gaskets: Serves as a base polymer for formulating sealants that require excellent weatherability, flexibility at low temperatures, and resistance to compression set.
• Polymer Modification & Additives: Utilized as a reactive modifier to improve the impact resistance, surface lubricity, and processing characteristics of organic plastics and resins.
• Electronics Potting & Encapsulation: Employed in the synthesis of silicone gels and resins for protecting sensitive electronic assemblies from moisture, vibration, and thermal shock.

Basic Information

Product Name	Dimethylsiloxane, Methyl Phenyl Methyl Vinyl Hydroxy-Term.
CAS No.	68083-15-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Hydroxy-Terminated Methyl Phenyl Methyl Vinyl Silicone Fluid; Vinyl Phenyl Methyl Hydroxy-Terminated Polydimethylsiloxane; Reactive Silicone Oil with Vinyl and Phenyl Groups; Hydroxy-Functional MQ Resin Intermediate; Poly(dimethylsiloxane-co-methylphenylsiloxane-co-methylvinylsiloxane), hydroxy-terminated; Phenyl Vinyl Silicone Diol; Reactive Phenylmethylvinyl Siloxane Polymer
EINECS	Contact for details

Quality Control

Our Dimethylsiloxane, Methyl Phenyl Methyl Vinyl Hydroxy-Term. is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for hydroxyl value, vinyl content, phenyl content, and viscosity, which are critical for consistent polymerization performance. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical-chemical parameters is 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 product is hygroscopic (moisture-sensitive). To prevent hydrolysis and maintain product integrity, containers must be kept tightly sealed when not in use and under a dry inert atmosphere (e.g., nitrogen) for long-term storage.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear viscous liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Contact for details
Hydroxyl Value	Contact for details
Vinyl Content	Contact for details
Phenyl Content	Contact for details
Water Content	< 0.1%

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