Description

Carbinol (Hydroxyl) Terminated Polydimethylsiloxane, 400-450 Cst is a reactive, linear silicone polymer featuring terminal hydroxyl groups, offering a unique combination of silicone fluid properties with reactive functionality. This dual nature makes it a critical intermediate for synthesizing custom silicone copolymers and modifying organic materials to impart flexibility, hydrophobicity, and thermal stability. It is essential for formulators and manufacturers in the personal care, coatings, adhesives, and specialty chemical industries seeking to enhance product performance through silicone integration.

Application

• Silicone Resin & Polymer Synthesis: Acts as a key building block or chain extender in the production of silicone polyethers, silicone polyesters, and other block copolymers.
• Personal Care & Cosmetics: Used as a conditioning agent and emollient in hair care products (shampoos, conditioners) and skin creams, providing a non-greasy, silky feel and improved spreadability.
• Industrial & Protective Coatings: Incorporated as a modifier to enhance the flexibility, water repellency, and thermal/oxidative stability of polyurethane, epoxy, and acrylic coating systems.
• Adhesives & Sealants: Functions as a reactive plasticizer or modifier in silicone-based and hybrid adhesives/sealants, improving adhesion and elasticity.
• Release Agents & Lubricants: Serves as a base fluid or component in formulating non-stick release coatings for industrial molding and high-temperature lubricants.
• Textile & Fiber Treatment: Applied to impart durable softness, water repellency, and improved hand feel to natural and synthetic fibers.
• Pharmaceutical & Medical Applications: Potential use in controlled-release drug delivery systems and as a component in topical formulations, subject to appropriate regulatory compliance.

Basic Information

Product Name	Carbinol (Hydroxyl) Terminated Polydimethylsiloxane, 400-450 Cst
CAS No.	68937-54-2
Molecular Formula	CnH3nO2Sin (n varies by chain length)
Molecular Weight	~3000 g/mol (Approximate, based on viscosity)
Synonyms	Hydroxyl-Terminated Polydimethylsiloxane; α,ω-Dihydroxypolydimethylsiloxane; Dimethyl Silicone Fluid, Hydroxy Terminated; OH-Terminated PDMS; Polydimethylsiloxane, dihydroxy terminated; Hydroxyalkyl functional silicone; Silicone glycol; Poly(dimethylsiloxane-co-methylhydrogensiloxane), hydroxy terminated; Dow Corning® Q1-3563 (example trade name)
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure batch-to-batch consistency and compliance with industry standards. Key parameters such as hydroxyl value, viscosity, and volatile content are strictly monitored. Certificates of Analysis (COA) detailing these 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, well-ventilated area at room temperature (15-25°C/59-77°F). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect reactivity and properties. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Viscosity (25°C)	400 - 450 cSt
Hydroxyl Value	Contact for details
Specific Gravity (25°C)	~0.97
Refractive Index (25°C)	~1.403
Volatile Content	< 1.0%
Water Content	< 0.1%

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