Product Name: Tetravinyl Tetramethyl Cyclotetrasiloxane

Product Code: NV-SIM221

Chemical Informations

Main Composition:2,4,6,8-Tetravinyl-2,4,6,8- tetramethyl cyclotetrasiloxane (DV4)

Molecular Structure：[CH2=CH(CH3)SiO]4

Cas No.:2554-06-5

EINECS: 219-863-1

Molecular weight  : 344.66

Product Description:

NV-SIM221 (also designated as D4V or V4) is a cyclic, ultra-pure reactive siloxane monomer containing four vinyl clusters on its structural cage.

Due to its concentrated vinyl content per molecule, itacts as an exceptionally aggressive cross-linker and regulatory agent in addition-cure silicone formulations. It drastically boosts hardness, tensile modulus, and thermal limits, making it indispensable for high-performance optical lens gels, LED encapsulation, and high-temperature rubbers.

Typical properties:

Appearance:Colorless transparent liquid

Purity:≥99.0% 

Vi content:≥30.3% 

V3 content:＜0.20%

V4 content:≥99.0%

The ethyl content (the vice peak followed V4):＜0.60%

Density(25℃,g/cm3) :0.9875～0.998

Refractive point(20℃):1.4300-1.4400

Boiling point(℃):224～224.5℃

Flashing point(℃):86℃

Water solubility:Insoluble

Key Applications:

Hardness & Modulus Booster: Drastically increases Shore hardness and cross-linking density in addition-cure formulations with minimal dosage.

Ring-Opening Polymerization: Serves as a vital monomer to synthesize high-vinyl content methylvinylsilicone rubbers (VMQ gums).

Electronic Encapsulants: Crucial ingredient in optimizing curing speed and transparency ceilings for LED, automotive potting, and aerospace junction coatings

Package: 190KG/DRUM or 950KG/IBC