Description

Siloxanes And Silicones, Me Vinyl, Hydroxy-Terminated, Reaction Products With Trimethoxy3-(Oxiranylmethoxy)Propylsilane is a specialized functional silicone intermediate, CAS 73891-89-1, designed for advanced material synthesis. This compound is valued for its dual functionality, combining reactive vinyl and epoxy groups with hydroxy-terminated siloxane chains to enable precise crosslinking and modification. It is essential for formulators and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance product performance, durability, and adhesion to diverse substrates.

Application

• High-Performance Silicone Resins & Coatings: Acts as a key crosslinking agent and modifier to improve thermal stability, chemical resistance, and weatherability in protective and release coatings.
• Advanced Adhesives & Sealants: Used to formulate silicone hybrid adhesives with enhanced bonding strength, flexibility, and durability for automotive, aerospace, and construction applications.
• Elastomer & Rubber Compounding: Serves as a reactive plasticizer or crosslinker to tailor the mechanical properties, compression set, and processability of silicone rubbers.
• Fiber & Textile Treatments: Imparts durable water repellency, softness, and anti-stick properties to technical textiles and glass fibers.
• Electronic Encapsulants & Potting Compounds: Enhances the dielectric properties, moisture resistance, and thermal management of materials used to protect sensitive electronic components.
• Mold Making & Release Agents: A component in formulations for high-temperature resistant molds and non-stick release coatings for composite manufacturing.

Basic Information

Product Name	Siloxanes And Silicones, Me Vinyl, Hydroxy-Terminated, Reaction Products With Trimethoxy3-(Oxiranylmethoxy)Propylsilane
CAS No.	73891-89-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	3-(Oxiranylmethoxy)propyltrimethoxysilane, reaction products with hydroxy-terminated methyl vinyl siloxanes; Epoxy-functional vinyl siloxane copolymer; Vinylmethylsiloxane-hydroxy terminated, reaction products with 3-glycidoxypropyltrimethoxysilane; Glycidoxypropyltrimethoxysilane-modified vinylmethylsiloxane; Epoxy-modified vinyl silicone intermediate; Siloxanes and silicones, methyl vinyl, hydroxy-terminated, reaction products with 3-glycidoxypropyltrimethoxysilane; CAS 73891-89-1
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Each batch is controlled against stringent specifications for key parameters such as epoxy equivalent weight, vinyl content, viscosity, and hydroxyl value. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory 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/59-77°F). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature reaction. Isolate from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Viscosity (25°C)	Contact for details
Epoxy Equivalent Weight (EEW)	Contact for details
Vinyl Content	Contact for details
Hydroxyl Value	Contact for details
Non-Volatile Matter	≥ 98.0 %
Identification (IR)	Conforms

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