Description

Monocarbinol Terminated Polydimethylsiloxane is a specialized organosilicon compound featuring a reactive hydroxyl group at one terminus of a polydimethylsiloxane (PDMS) chain. This unique structure makes it a valuable intermediate for introducing silicone properties into polymers and coatings, offering a balance of flexibility, hydrophobicity, and thermal stability. It is essential for formulators and manufacturers in the personal care, coatings, and specialty polymer industries seeking to modify surface properties and enhance material performance.

Application

• Silicone-Modified Polymers (SMPs): Acts as a key intermediate for grafting silicone segments onto organic polymer backbones (e.g., polyethers, polyesters) to create materials with improved weatherability, flexibility, and moisture resistance.
• Personal Care & Cosmetics: Used in the synthesis of silicone-based emulsifiers, surfactants, and conditioning agents for hair care and skincare products, providing a soft, non-greasy feel.
• Release Coatings & Pressure-Sensitive Adhesives (PSAs): Serves as a reactive modifier to tailor release force and adhesion properties in silicone release liners and specialty adhesive formulations.
• Surface Treatments & Additives: Employed to create hydrophobic or anti-fouling surface treatments for textiles, paper, and industrial materials.
• Crosslinking Agent: Functions as a chain extender or crosslinker in the production of silicone resins, elastomers, and gels, where the terminal hydroxyl group participates in condensation reactions.
• Lubricant & Anti-Foam Intermediate: Utilized in the manufacture of high-performance silicone lubricants and anti-foaming agents for industrial processes.

Basic Information

Product Name	Monocarbinol Terminated Polydimethylsiloxane
CAS No.	207308-30-3
Molecular Formula	CnH2n+2O2Sin (Variable, based on chain length 'n')
Molecular Weight	Variable (Contact for details)
Synonyms	α-Hydroxy-ω-methylpoly(dimethylsiloxane); Monohydroxy Terminated PDMS; Polydimethylsiloxane, monohydroxy terminated; PDMS Monocarbinol; Hydroxyalkyl Functional Silicone Fluid; Silanol Terminated Polydimethylsiloxane (related); Mono-hydroxyl Polydimethylsiloxane; Reactive Silicone Fluid
EINECS	Contact for details

Quality Control

Our Monocarbinol Terminated Polydimethylsiloxane is produced under a strict quality management system. Each batch undergoes comprehensive analysis to ensure consistency in hydroxyl value, viscosity, molecular weight distribution, and purity. Certificates of Analysis (COA) documenting key specifications 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, bases, and oxidizing agents. Under these conditions, the product is stable for extended periods.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Complies
Hydroxyl Value (mg KOH/g)	As per grade (Contact for details)
Viscosity @ 25°C (cSt)	As per grade (Contact for details)
Water Content (Karl Fischer)	≤ 0.1% (w/w)
Specific Gravity @ 25°C	0.95 - 0.98
Refractive Index @ 25°C	1.400 - 1.410

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