Description

Vinyltetramethyldisiloxane is a versatile organosilicon monomer featuring a reactive vinyl group and two trimethylsilyl units. This compound is a critical building block in silicone chemistry, valued for its ability to introduce vinyl functionality into polymer backbones, enabling cross-linking and property modification. It is essential for manufacturers in the silicone rubber, release coatings, and specialty adhesive industries seeking to enhance product performance through controlled curing and network formation.

Application

• Silicone Cross-linking Agent: A key component in the production of heat-cured (HCR) and liquid silicone rubbers (LSR) to facilitate peroxide or platinum-catalyzed vulcanization.
• Silicone Fluid & Resin Modifier: Used to introduce vinyl groups into silicone polymers, improving their adhesion, tensile strength, and compatibility with other materials.
• Release Coating Formulations: Serves as a reactive intermediate in the synthesis of silicone-based release coatings for labels, tapes, and packaging.
• Hydrosilylation Reactions: Acts as a fundamental starting material or chain extender in platinum-catalyzed hydrosilylation processes to create custom siloxane structures.
• Adhesive & Sealant Precursor: Employed in formulating high-performance silicone adhesives and sealants that require excellent weatherability and flexibility.
• Surface Treatment Agent: Used to modify inorganic surfaces, providing hydrophobic or specific functional group coatings.

Basic Information

Product Name	Vinyltetramethyldisiloxane
CAS No.	55967-52-7
Molecular Formula	C6H18OSi2
Molecular Weight	162.38 g/mol
Synonyms	1,1,1,3,3-Pentamethyl-3-vinyldisiloxane; Divinyltetramethyldisiloxane (common misnomer); Vinylpentamethyldisiloxane; VTMDS; Tetramethylvinyldisiloxane; Vinyl-terminated polydimethylsiloxane precursor; Disiloxane, 1,1,1,3,3-pentamethyl-3-vinyl-; 3-Ethenyl-1,1,1,3,3-pentamethyldisiloxane
EINECS	Contact for details

Quality Control

Our Vinyltetramethyldisiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC) for purity and identity verification, to ensure consistency and reliability for industrial synthesis. Certificates of Analysis (COA) detailing specific batch results 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). Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and minimize evaporation losses. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.390 - 1.395
Density (20°C)	0.82 - 0.86 g/mL

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