Tetramethyltetravinylcyclotetrasiloxane (D4Vi)

Tetramethyltetravinylcyclotetrasiloxane (D4Vi) is a vital cyclic organosilicon compound with the chemical formula [(CH₃)(CH₂=CH)SiO]₄. It features a four-membered siloxane ring with four methyl groups and crucially, four reactive vinyl groups attached to the silicon atoms. D4Vi presents as a clear, colorless, and odorless liquid. The presence of multiple vinyl groups makes D4Vi an exceptionally reactive monomer, serving as a critical building block for synthesizing a wide range of high-performance silicone materials.

Basic Information of Tetramethyltetravinylcyclotetrasiloxane

CAS No.:	2554-06-5
EC No.:	219-863-1
Linear Formula:	[(CH₃)(CH₂=CH)SiO]₄
Molecular Weight:	344.66
Appearance:	Transparent Liquid
Melting Point:	−44 °C (dec.)(lit.)
Boiling point:	111-112 °C10 mm Hg(lit.)
Density:	0.997 g/mL at 25 °C(lit.)
Purity:	Typically ≥98%, ensuring reliable and consistent performance in polymerization.
Vinyl Content:	High content of reactive vinyl groups (four per molecule).
Solubility:	Soluble in common organic solvents (e.g., toluene, xylene, hydrocarbons), insoluble in water.
Reactivity:	Highly reactive, primarily through hydrosilylation (addition curing) with Si-H functional siloxanes.
Stability:	Stable under recommended storage conditions.
Chemical Structure:

Applications of Tetramethyltetravinylcyclotetrasiloxane

Due to its high reactivity and precise molecular structure, Tetramethyltetravinylcyclotetrasiloxane (D4Vi) is an indispensable monomer and crosslinking agent in the synthesis of advanced silicone materials:

• High Vinyl Silicone Rubbers:

• Essential raw material for producing Liquid Silicone Rubber (LSR) and Room Temperature Vulcanizing (RTV) silicone rubbers. It provides the necessary vinyl functionality for platinum-catalyzed addition curing systems.

• Used in High Consistency Rubber (HCR) formulations, contributing to crosslink density and mechanical strength.

• Specialty Silicone Oils and Fluids:

• Used in the synthesis of high vinyl content silicone oils, which are precursors for various functional silicone products and elastomers.

• Enables the creation of silicone fluids with controlled reactivity for specific applications.

• Crosslinking and Chain Extension:

• Functions as a key crosslinking agent in platinum-catalyzed addition cure systems, forming robust silicone networks.

• Can be used for chain extension or molecular weight modification in silicone polymer synthesis.

• Adhesives and Sealants:

• A component in the formulation of silicone-based adhesives and sealants where specific cure profiles and mechanical properties are required.

• Advanced Materials Research:

• A valuable reagent in research and development for exploring novel silicone chemistries and creating new functional silicone materials.

• Consistent Quality: Our stringent quality control measures ensure that every batch meets the highest industry standards for consistency and reliability.

• Dedicated Technical Support: Our experienced team is ready to provide comprehensive technical data and guidance, assisting you in optimizing your formulations and processes.

Hazards Classification

• GHS Classification: Flammable Liquid (GHS02), Exclamation Mark (GHS07), Environmental Hazard (GHS09)

• Hazard Statements: Flammable liquid and vapor; may cause skin and eye irritation; toxic to aquatic life with long lasting effects.

• UN Number: UN 1993

• Hazard Class: 3 (Flammable Liquids)

• Packing Group: III