Description

Hexacosyl Terminated Polydimethylsiloxane, 65 Cst is a high-purity, linear organosilicon polymer featuring a hexacosyl (C26) alkyl group at each chain terminus. This specific termination and controlled viscosity (65 centistokes) provide a unique combination of lubricity, hydrophobicity, and thermal stability. It is an essential functional fluid and additive for formulators seeking to enhance surface properties and reduce friction in demanding environments. Key industries that utilize this material include advanced lubricants, high-performance coatings, and specialty polymer processing.

Application

• High-Temperature Lubricant Base Fluid: Used as a base or additive in synthetic lubricants and greases requiring excellent thermal stability and low volatility.
• Mold Release Agent: Provides superior, non-migrating release properties for plastics, rubber, and composite materials manufacturing.
• Surface Treatment & Water Repellent: Imparts durable hydrophobic and oleophobic characteristics to textiles, paper, and various substrates.
• Plastic and Rubber Additive: Acts as an internal lubricant and processing aid to improve flow, reduce sticking, and enhance surface finish.
• Cosmetic and Personal Care Ingredient: Functions as an emollient and conditioning agent in high-end skincare and haircare formulations for a non-greasy, silky feel.
• Defoamer Component: Employed in the formulation of defoamers and antifoams for industrial processes, including paints, adhesives, and wastewater treatment.

Basic Information

Product Name	Hexacosyl Terminated Polydimethylsiloxane, 65 Cst
CAS No.	190793-19-2
Molecular Formula	CnH2n+2OmSim (Polymeric)
Molecular Weight	Varies by chain length. Contact for details.
Synonyms	Hexacosyl Dimethylsiloxy Terminated Polydimethylsiloxane; C26-Alkyl Terminated PDMS; Polydimethylsiloxane, hexacosyl-terminated; PDMS, C26-terminated; Silicone Fluid AK 65 (C26); Alkyl-modified Silicone Oil (C26); Linear Alkyl-Terminated Siloxane
EINECS	Contact for details.

Quality Control

Our Hexacosyl Terminated Polydimethylsiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in viscosity, purity, and functional performance. Certificates of Analysis (COA) documenting key parameters are available upon request. We adhere to relevant industry standards and can support compliance needs for specific applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. For long-term storage, consider using an inert atmosphere to maintain optimal quality.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Viscosity @ 25°C	65 ± 5 cSt
Specific Gravity @ 25°C	0.96 - 0.98
Refractive Index @ 25°C	1.400 - 1.410
Purity (by GPC)	≥ 95.0%
Water Content (KF)	≤ 0.1%
Volatile Matter	≤ 1.0%

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