Description

Polydimethylsiloxanes, Vinyldimethylsiloxy Term is a specialized reactive silicone fluid featuring terminal vinyl groups. This chemical structure is critical for enabling cross-linking and copolymerization reactions, making it a versatile building block for high-performance materials. It is essential for manufacturers in the silicone rubber, adhesive, sealant, and specialty coating industries seeking to enhance product elasticity, thermal stability, and chemical resistance.

Application

• Primary raw material for the synthesis of High-Consistency Rubber (HCR) and Liquid Silicone Rubber (LSR).
• Key intermediate in the production of silicone-based adhesives and sealants with improved adhesion and flexibility.
• Used as a reactive modifier in release coatings and pressure-sensitive adhesives (PSAs).
• Essential component for creating silicone gels and encapsulants for electronics and LED packaging.
• Building block for custom silicone copolymers and graft polymers with unique properties.
• Used in the formulation of textile softeners and fiber coatings to impart durable, soft hand feel.

Basic Information

Product Name	Polydimethylsiloxanes, Vinyldimethylsiloxy Term
CAS No.	68951-99-5
Molecular Formula	Typically CnH2n+2OmSim (Variable)
Molecular Weight	Variable (Contact for details)
Synonyms	Vinyl-terminated Polydimethylsiloxane; Vinyl PDMS; α,ω-Divinyldimethylsiloxy Polydimethylsiloxane; Vinyldimethylsiloxy-terminated Dimethyl Silicone Fluid; Vinyl Silicone Fluid; Reactive Vinyl Silicone Oil; Polymethylvinylsiloxane (terminated); Divinyl Polydimethylsiloxane
EINECS	Contact for details

Quality Control

Our Polydimethylsiloxanes, Vinyldimethylsiloxy Term is manufactured under a strict quality management system. Each batch is tested to ensure consistent vinyl content, viscosity, and purity, which are critical for predictable polymerization performance. A comprehensive Certificate of Analysis (COA) detailing key specifications is provided with every shipment to guarantee compliance with your formulation requirements.

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). Keep away from heat sources and incompatible materials such as strong acids, bases, and oxidizing agents. Under recommended conditions, the product is stable for at least 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Complies
Viscosity (25°C)	Grade Dependent (cSt)
Vinyl Content (mmol/g)	Grade Dependent
Specific Gravity (25°C)	~0.97
Refractive Index (n20D)	~1.403
Volatile Matter	≤ 1.0%

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