Description

Siloxanes And Silicones, Me Ph, Hydroxy-Terminated is a specialized organosilicon polymer featuring methyl and phenyl side groups with reactive hydroxyl end groups. This unique structure provides an exceptional balance of thermal stability, flexibility, and compatibility with a wide range of organic and inorganic materials. It is a critical intermediate for formulators and manufacturers in high-performance sectors, enabling the creation of advanced materials with enhanced properties. Its primary value lies in its versatility as a building block for silicone resins, elastomers, and tailored surface modifiers.

Application

• Silicone Resin & Elastomer Synthesis: Serves as a key prepolymer for producing high-temperature resistant silicone resins and phenyl-containing silicone rubbers.
• Release Coatings & Pressure-Sensitive Adhesives (PSAs): Used to formulate premium release liners and to modify the adhesive properties of PSAs for controlled tack and peel.
• High-Performance Coatings: Incorporated into industrial and protective coatings to improve heat resistance, weatherability, and water repellency.
• Electronic Encapsulants & Potting Compounds: Enhances the thermal and dielectric properties of materials used to protect sensitive electronic components.
• Fiber & Textile Treatment: Imparts softness, lubricity, and durable water repellency (DWR) to technical textiles and fibers.
• Cosmetic & Personal Care Ingredients: Acts as a film-forming agent and emollient in high-end cosmetic formulations, providing a silky feel and improved product stability.
• Adhesion Promoters & Coupling Agents: Functions as a reactive intermediate in the synthesis of silane coupling agents for composites and filled polymers.

Basic Information

Item	Details
Product Name	Siloxanes And Silicones, Me Ph, Hydroxy-Terminated
CAS No.	80801-30-5
Molecular Formula	Typically (C6H5)(CH3)SiO[ (C6H5)(CH3)SiO ]nSi(CH3)(C6H5)OH (Variable n)
Molecular Weight	Variable (Oligomer/Mixture)
Synonyms	Hydroxy-Terminated Methyl Phenyl Siloxane; Methyl Phenyl Silicone Oil, Hydroxy-Terminated; Poly(methylphenylsiloxane), hydroxy-terminated; PMPS, OH-terminated; Dow Corning® 550 Fluid (similar type); Phenyl Methyl Silicone Fluid with Silanol Endgroups; Silanol-Terminated Methylphenylpolysiloxane; Me Ph Siloxane Diol
EINECS	Contact for details

Quality Control

Our hydroxy-terminated methyl phenyl siloxanes are manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in hydroxyl value, viscosity, phenyl content, and purity. Certificates of Analysis (COA) detailing key specifications are provided with every shipment. We adhere to relevant industry standards and can support compliance requirements for specific applications upon request.

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/59-77°F). This product is hygroscopic (moisture-sensitive). To prevent moisture absorption and potential condensation polymerization, containers must be kept tightly sealed when not in use. Use dry, inert gas padding for optimal long-term storage stability.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Complies
Viscosity @ 25°C	Specified Grade Dependent (cSt)
Hydroxyl Value (OH#)	Specified Grade Dependent (mg KOH/g)
Phenyl Content	Specified Grade Dependent (%)
Volatile Matter	≤ 1.0% (Typical)
Water Content (KF)	≤ 0.1%

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