Product Name: Vinyl silicone fluid NV-SiVi281

Alias: End and side chain vinyl silicone oil; Vinyl terminated vinyl branched silicone fluid

Product Code:NV-SiVi281

Chemical Information:

Main Composition: Vinylmethylsiloxane dimethylsiloxane copolymer,vinyl terminated.

Molecular Structure:

CH2=CH–[Si(CH3)(CH=CH2)–O]m–[Si(CH3)2–O]n–CH=CH₂

Chemical Characterization:

A linear siloxane copolymer containing both methyl and vinyl functional groups along the backbone and at the chain ends, designed for high-density cross-linking and enhanced mechanical strength in addition-cure systems.

Cas No.:68083-18-1

Typical properties

Appearance: Colourless transparent liquid

Density(25℃，g/cm3)： 0.9600-0.9900

Refractive index:  1.4010-1.4080

* The viscosity can be customed according to your request.

Key Features & Benefits

High Cross-link Density: The combination of side-chain and terminal vinyl groups allows for a much denser chemical network, significantly increasing the hardness and modulus of the final product.

Fast Cure Speed: Higher vinyl content accelerates the hydrosilylation reaction, improving production efficiency.

Enhanced Toughness: Improves the tear resistance and durability of silicone composites.

Applications

Reinforcing Agent: Added to standard silicone formulations to adjust mechanical hardness (Shore A).

Specialty Coatings: Used in release liners and non-stick coatings where a rapid, high-strength cure is required.

High-Performance Seals: Used in automotive and aerospace gaskets that demand high pressure resistance.

Recommended Dosage Guidelines

Role: Reinforcing Agent / Hardness Modifier

Recommended Dosage: 3 – 15 phr

Guidance:

* High Hardness: Increase the dosage when a higher Shore A hardness is required.

* Fast Cure: Its multi-vinyl functionality significantly accelerates the curing speed (T90).

* Caution: Exceeding 20 phr may lead to brittleness and a reduction in elongation at break

Package

190kg/plastic or metal drums,950kg-1000kg/IBC.

Transportation & storage:

This product is active chemical. Impurities (especially catalyst) shall not be mixed in the process of storage and transportation.

Attention should be paid to whether other materials can react chemically.

Be stored in a clean,airtight plastic or plastic coated metal drum.

Shelf life:24months.