Description

Poly(Dimethylsiloxane), Hydroxy Terminated is a reactive silicone polymer featuring hydroxyl (-OH) end groups, which impart unique reactivity and compatibility for advanced material synthesis. This functional fluid is a critical intermediate for creating silicone-based elastomers, resins, and copolymers with tailored properties. It is essential for manufacturers in the adhesives, sealants, coatings, and personal care industries seeking to enhance product performance, durability, and processability.

Application

• Silicone Polymer Synthesis: Primary intermediate for the production of silicone resins, elastomers (RTV), and block copolymers via condensation or addition reactions.
• Adhesives & Sealants: Used as a reactive modifier or base polymer to improve flexibility, thermal stability, and adhesion in high-performance formulations.
• Surface Treatments & Coatings: Serves as a precursor for creating water-repellent, anti-fouling, or release coatings on various substrates.
• Personal Care & Cosmetics: Employed in the synthesis of silicone derivatives that act as emollients, conditioners, and texture enhancers in skincare and haircare products.
• Lubricants & Greases: Acts as a base fluid or additive to formulate high-temperature, stable lubricants with excellent viscosity-temperature characteristics.
• Pharmaceutical & Medical Devices: Utilized in the manufacture of silicone components requiring specific biocompatibility and stability, subject to appropriate purity grades.
• Mold Making & Release Agents: Key component in formulations for flexible molds and non-stick release agents due to its low surface energy.
• Electronics Encapsulation: Used in potting and encapsulation compounds to protect sensitive components from moisture, thermal stress, and mechanical shock.

Basic Information

Product Name	Poly(Dimethylsiloxane), Hydroxy Terminated
CAS No.	31692-79-2
Molecular Formula	Contact for details
Molecular Weight	Varies by grade/viscosity
Synonyms	Hydroxy-terminated Polydimethylsiloxane; α,ω-Dihydroxypolydimethylsiloxane; PDMS, OH-terminated; Dimethyl Siloxane, Hydroxy Terminated; Hydroxyl-terminated PDMS; Poly(dimethylsiloxane) diol; Silicone Diol; OH-PDMS
EINECS	Contact for details

Quality Control

Our Poly(Dimethylsiloxane), Hydroxy Terminated is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as hydroxyl value, viscosity, molecular weight distribution, and purity. Certificates of Analysis (COA) documenting these specifications are available upon request. We can supply grades suitable for various industrial applications, with options for customized specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (typically 15-25°C). Keep away from strong acids, bases, and oxidizing agents. Under recommended storage conditions, the product is stable for an extended period.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear viscous liquid
Identification (IR)	Conforms
Viscosity (25°C)	Grade dependent (e.g., 100 - 100,000 cSt)
Hydroxyl Value	Grade dependent
Water Content	< 0.1% (by Karl Fischer)
Specific Gravity (25°C)	~0.97
Refractive Index (25°C)	~1.403

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