Description

Carbinol (Hydroxyl) Terminated Polydimethylsiloxane is a specialized silicone polymer featuring reactive hydroxyl groups at the chain termini. This unique structure provides a versatile platform for chemical modification and cross-linking, making it a valuable intermediate in advanced material synthesis. It is essential for manufacturers in the personal care, coatings, and specialty elastomer industries seeking to enhance product performance through silicone integration.

Application

• Silicone Resin & Elastomer Modification: Acts as a reactive intermediate or chain extender in the production of high-performance silicone rubbers, resins, and pressure-sensitive adhesives.
• Personal Care & Cosmetic Formulations: Used as a key ingredient in hair conditioners, skin care products, and antiperspirants to provide softness, gloss, and improved texture without greasiness.
• Industrial & Protective Coatings: Incorporated into coating systems to impart water repellency, weather resistance, and enhanced surface slip.
• Release Agents & Mold Making: Serves as a base component in formulating non-stick release coatings for industrial molding and food processing applications.
• Pharmaceutical & Medical Device Lubricants: Utilized in the development of biocompatible lubricants for medical devices and drug delivery systems.
• Textile & Fiber Treatment: Applied as a softener and water-repellent finishing agent for fabrics and non-woven materials.
• Adhesive & Sealant Formulations: Functions as a plasticizer and rheology modifier to improve the flexibility and application properties of sealants.

Basic Information

Product Name	Carbinol (Hydroxyl) Terminated Polydimethylsiloxane
CAS No.	104780-66-7
Molecular Formula	(C2H6OSi)n•C2H8O2Si
Molecular Weight	Variable (Depends on chain length 'n')
Synonyms	Hydroxyl-Terminated PDMS; α,ω-Dihydroxypolydimethylsiloxane; Dimethylsiloxane, hydroxy-terminated; Polydimethylsiloxane, dihydroxy terminated; Bis(hydroxyalkyl)-terminated polydimethylsiloxane; Hydroxyalkyl silicone fluid; OH-terminated silicone oil; Silanol-terminated polydimethylsiloxane
EINECS	Contact for details

Quality Control

Our Carbinol (Hydroxyl) Terminated Polydimethylsiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including determination of hydroxyl value, viscosity, and purity, to ensure consistency and performance. Certificates of Analysis (COA) documenting key specifications are available upon request to support your quality assurance protocols.

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 product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect reactivity and properties.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade dependent (cSt)
Hydroxyl Value	Specified grade dependent (mg KOH/g)
Water Content	≤ 0.1% (Karl Fischer)
Specific Gravity (25°C)	0.96 - 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.