Description

Polytrifluoropropylmethylsiloxane, Silanol Terminated is a specialized fluorosilicone polymer featuring reactive silanol (Si-OH) end groups. This unique structure provides exceptional chemical resistance to fuels, oils, and solvents, combined with the low surface energy and thermal stability characteristic of silicones. It is a critical intermediate for manufacturers in the aerospace, automotive, and specialty coatings industries seeking to develop high-performance, durable materials.

Application

• Fluorosilicone Elastomer Precursor: Primary building block for the synthesis of high-performance fluorosilicone rubbers (FVMQ) used in demanding sealing applications.
• Surface Modification Agent: Imparts oil, water, and chemical repellency to textiles, fibers, and various substrates.
• Specialty Additive for Coatings & Adhesives: Enhances release properties, abrasion resistance, and environmental durability of industrial coatings and pressure-sensitive adhesives.
• Crosslinking Agent: Used in condensation-cure silicone systems to introduce fluorinated properties and improve compatibility with organic polymers.
• Lubricant & Grease Formulation: Serves as a base fluid or additive for high-performance lubricants requiring stability in aggressive chemical environments.
• Mold Making & Release: Employed in the production of molds for composites and plastics where excellent release characteristics are essential.

Basic Information

Product Name	Polytrifluoropropylmethylsiloxane, Silanol Terminated
CAS No.	68607-77-2
Molecular Formula	(C4H4F3OSi)n • C3H9O3Si2 (Representative)
Molecular Weight	Varies by chain length (n). Contact for details.
Synonyms	Silanol-Terminated Poly(3,3,3-Trifluoropropylmethylsiloxane); α,ω-Dihydroxypoly(3,3,3-trifluoropropylmethylsiloxane); Fluorosilicone Diol; Hydroxy-Terminated Fluorosilicone Oil; FVMQ Diol; Poly[(3,3,3-trifluoropropyl)methylsiloxane], dihydroxy terminated; 3,3,3-Trifluoropropylmethylsiloxane-diol copolymer; Fluorinated silanol-terminated silicone fluid.
EINECS	Contact for details.

Quality Control

Our Polytrifluoropropylmethylsiloxane, Silanol Terminated is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including determination of molecular weight, silanol content, viscosity, and purity. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

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). To prevent premature condensation reactions and viscosity increase, containers must be kept tightly sealed when not in use. Store away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade dependent (cSt)
Silanol Content (OH Value)	Specified grade dependent (wt.%)
Molecular Weight (Mn)	Specified grade dependent (g/mol)
Water Content	< 0.1% (by Karl Fischer titration)
Specific Gravity (25°C)	~1.25 - 1.30
Refractive Index (n20D)	~1.38 - 1.40

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