Description

Poly(Dimethylsiloxane-Co-Methylphenylsiloxane) is a specialized silicone copolymer that combines the properties of dimethylsiloxane and methylphenylsiloxane units. This product is valued for its enhanced thermal stability, lubricity, and compatibility with a wide range of materials compared to standard polydimethylsiloxanes. It is essential for manufacturers in the personal care, industrial lubricant, and specialty polymer sectors seeking high-performance silicone fluids with tailored characteristics.

Application

• High-temperature lubricants and greases for industrial machinery.
• Key ingredient in personal care products, such as hair conditioners and skin creams, for its smooth feel and gloss.
• Additive in paints, coatings, and inks to improve flow, leveling, and mar resistance.
• Base fluid for damping and hydraulic systems requiring stable viscosity over a wide temperature range.
• Processing aid and internal lubricant for engineering plastics and rubber compounds.
• Component in release agents for molding and casting applications.
• Used in dielectric and heat transfer fluids for specialized electrical and thermal management systems.

Basic Information

Product Name	Poly(Dimethylsiloxane-Co-Methylphenylsiloxane)
CAS No.	63148-52-7
Molecular Formula	(C2H6OSi)m(C7H8OSi)n
Molecular Weight	Varies by grade (typically 1,000 - 100,000 g/mol)
Synonyms	Polydimethylsiloxane-co-methylphenylsiloxane; Methyl Phenyl Silicone Fluid; Phenylmethyl Silicone Oil; Dimethyl Siloxane-Methylphenyl Siloxane Copolymer; Phenyl Methyl Polysiloxane; PMPS; Phenyl Modified Silicone Fluid; Silicone Copolymer 63148-52-7
EINECS	Contact for details

Quality Control

Our Poly(Dimethylsiloxane-Co-Methylphenylsiloxane) is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent performance, including verification of viscosity, phenyl content, refractive index, and purity. Certificates of Analysis (COA) documenting all test results 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 acids and organic solvents. For long-term storage, consider using an inert gas blanket to minimize oxidative degradation.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Grade-dependent (e.g., 100 - 10,000 cSt)
Refractive Index (n20D)	1.460 - 1.520
Phenyl Content	Grade-dependent (e.g., 5 - 40 mol%)
Specific Gravity (25°C)	0.98 - 1.10
Volatile Matter	≤ 1.0%
Acidity/Alkalinity	Neutral

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