Description

Methylhydrosiloxane, Phenylmethylsiloxane Copolymer, Hydride Terminated is a specialized organosilicon polymer featuring both methyl and phenyl substituents along the siloxane backbone, terminated with reactive silicon-hydrogen (Si-H) bonds. This unique structure provides a balance of reactivity, thermal stability, and compatibility, making it a valuable intermediate for advanced material synthesis. It is essential for manufacturers in the silicone elastomer, adhesive, and specialty coating industries seeking to enhance product performance through cross-linking and modification.

Application

• Cross-linking Agent: Primary use as a reactive hydride source for curing and cross-linking vinyl-functionalized silicones in heat-cured (HCR) and liquid silicone rubber (LSR) formulations.
• Adhesives & Sealants: Key component in high-performance silicone adhesives and sealants, contributing to improved adhesion, flexibility, and thermal resistance.
• Release Coatings: Used in the synthesis of phenyl-containing release coatings for labels and industrial tapes, offering controlled release properties.
• Silicone Modification: Serves as a grafting or branching agent to modify the properties of other polymers, enhancing their heat resistance and dielectric properties.
• Potting & Encapsulation: Employed in electronic potting and encapsulation compounds where stability across a wide temperature range is critical.
• Hydrophobic Coatings: A precursor for creating durable, water-repellent surface treatments for textiles, construction materials, and optical components.

Basic Information

Product Name	Methylhydrosiloxane, Phenylmethylsiloxane Copolymer, Hydride Terminated
CAS No.	115487-49-5
Molecular Formula	Typically represented as (C6H5CH3SiO)x(CH3HSiO)y
Molecular Weight	Varies by grade (Contact for details)
Synonyms	Hydride-Terminated Methyl Phenyl Siloxane Copolymer; Poly(methylhydro)(phenylmethyl)siloxane, hydride terminated; Phenylmethylsiloxane-dimethylsiloxane copolymer, hydride terminated; Methylphenylhydrogen polysiloxane; Si-H functional methyl phenyl siloxane; Reactive phenylmethyl silicone fluid; Hydrosilylation copolymer intermediate; Hydrogen-terminated phenylmethyl methylhydro siloxane
EINECS	Contact for details

Quality Control

Our Methylhydrosiloxane, Phenylmethylsiloxane Copolymer, Hydride Terminated is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as hydride content, viscosity, and phenyl/methyl ratio. Certificates of Analysis (COA) documenting purity, identity, and assay 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). This material is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) and minimize headspace in opened containers to preserve reactivity and shelf life.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Complies
Viscosity @ 25°C	Specification available upon request
Hydride Content (Si-H)	Specification available upon request
Phenyl Content	Specification available upon request
Water Content	< 200 ppm
Specific Gravity @ 25°C	Specification available upon request
Refractive Index @ 25°C	Specification available upon request

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