Vinyl Silane Coupling Agent Crosile® 171

Crosile® 171 Vinyltrimethoxysilane is a silane coupling agent with a Vinyl and hydroxyl groups that can be used to enhance the wettability and improve the superhydrophobic characteristics of different composites.

Item NO.:
Crosile® 171
EINECS No:
220-449-8
CAS No.:
2768-02-7
Chemical Formula:
CH2=CHSi(OCH3)3
Properties:
Colorless or yellowish transparent liquid, soluble in organic solvents such as alcohol, toluene, propanone, benzene, etc., hydrolyze in acidic aqueous

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Vinyl Silane Coupling Agent Crosile^® 171

Adhesion Promoter or Water Scavengers

Product Description

Crosile^® 171 Vinyltrimethoxysilane is a silane coupling agent that contains vinyl and hydroxyl groups. It can be effectively utilized to enhance the wettability and improve the superhydrophobic characteristics of different composites.

Chemical Identity

Chemical Name: Vinyltrimethoxysilane (VTMO)
CAS Number: 2768-02-7
Synonyms: (Trimethoxysilyl)ethylene, Trimethoxy(vinyl)silane, Vinylmethyltrimethoxysilane, Vinyltrimethoxysilane, Vinyl teimethoxy silane

Molecular Mechanism

Crosile 171 is a bifunctional vinyl silane containing vinyl and hydroxyl groups. Its alkoxysilane (methoxy) moiety reacts with water to form silicon-oxygen-silicon (Si-O-Si) bonds that cross-link and cure the material, while the vinyl group reacts with the resin to form a covalent bridge between inorganic substrates and the polymer matrix.

Key Features

Vinyl-Functional Silane

A silane coupling agent containing vinyl and hydroxyl groups, providing dual reactivity.

Colorless Liquid

Supplied as a colorless liquid.

High Purity

Crosile 171 content of >98% (typical 99.65%), with low residual methanol, ethyltrimethoxysilane and chlorine.

Performance Improvement

Enhanced Wettability: Effectively enhances the wettability of different composites.

Superhydrophobic Characteristics: Improves the superhydrophobic characteristics of composites.

Stronger Interfacial Bonding: Forms a covalent Si-O-Si bond with the glass substrate while the resin reacts with the vinyl group.

Improved Mechanical Properties: Leads to stronger bonds and improved mechanical properties in fiberglass production.

Technical Specifications

Properties	Units	Target Values(Spec, Limits)	Typical Value
Appearance	----	Colorless Liquid	Colorless Liquid
Crosile 171 Content	%(wt)	>98%	99.65
Density(p20) g/cm3	g/cm3	0.9700+/_0.0050	0.9708
Refractive Index(25°C)	---	1.3930+/_0.0050	1.392
Ethyltrimethoxysilane Content	%	1.0	0.23
Methanol Content	%	1.0	0.01
Chlorine Content	%	Max 10ppm	5ppm
Boiling Point	°C	122-123°C	123

Application Scenarios

Modified Polyethylene

Used as a monomer for producing modified polyethylene with different densities and co-polymer structures, allowing the fine-tuning of the final properties of the polymer, such as block-copolymer with a comb structure or linear structure.

Cable Shields & Electrical Resistances

The modified polymers derived from Crosile 171 find applications in cable shields and electrical resistances, offering improved properties suitable for electrical insulation in certain types of cables and water pipes in under-floor heating installations.

Cross-Linking Agent for PEX

Used as a cross-linking agent in the manufacturing of cross-linked polyethylene (PEX). The alkoxysilane moiety reacts with water, forming silicon-oxygen-silicon bonds that cross-link the material and cure it; moisture-curable polymers including PEX are commonly used as electrical insulation and in water pipe applications.

Coupling Agent / Adhesion Promoter

Along with amino-functional and epoxy-functional silanes, serves as a coupling agent or adhesion promoter for treating glass fibers and particulate minerals to enhance their bonding strength with resin, improving mechanical properties in fiberglass production.

Packaging And Transportation

Packing: 19 ton per 20'FCL using 950 kg IBCs, or 15.2 ton per 20'FCL using 190 kg drums.
Storage: Kept at a low temperature, dry and ventilated place, avoid direct sunlight.
Shelf life: One year in a ventilated, cool and dry area.

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