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Vinyltriethoxysilane is an organosilane coupling agent used to improve adhesion and compatibility between inorganic surfaces and organic polymers, and Vinyltriethoxysilane is valued for enhancing bonding, moisture resistance, and mechanical performance in filled or reinforced systems.
Vinyltriethoxysilane is widely used in wire and cable insulation, polyethylene crosslinking systems, fiberglass-reinforced composites, coatings, and adhesives, and Vinyltriethoxysilane performance depends on purity, hydrolysis and condensation control, dosage, and the chemistry of the substrate and polymer matrix.
Vinyltriethoxysilane is typically supplied as a clear, colorless liquid with characteristic odor, and Vinyltriethoxysilane hydrolyzes in the presence of moisture and can release ethanol, so handling requires moisture control, ventilation, and strict safety practices.
CAS Number: 78-08-0
EC Number: 201-083-8
Molecular Formula: C8H18O3Si
Molecular Weight: 190.32 g/mol
Synonyms: Vinyltriethoxysilane, VTES, Triethoxyvinylsilane, Vinyl Triethoxy Silane, Silane Coupling Agent VTES, Vinyltriethoxysilane Monomer, Triethoxy(vinyl)silane, Vinylsilane Triethoxy, Organosilane Coupling Agent, VTES Crosslinking Silane, Vinyltriethoxysilane Adhesion Promoter, Vinyltriethoxysilane Grafting Agent, Vinyltriethoxysilane, Vinyl Triethoxy Silane, Triethoxyvinylsilane, Triethoxy Vinyl Silane, VTES, VTEO, Ethenyltriethoxysilane, Ethenyl Triethoxy Silane, Triethoxyethenylsilane, Triethoxy Ethenyl Silane, Silane, Ethenyltriethoxy-, Silane, Vinyltriethoxy-, Vinyltri(ethoxy)silane, Tri(ethoxy)vinylsilane, Triethoxy(vinyl)silane, Ethoxyvinylsilane, Vinylethoxysilane, Organofunctional Vinyl Silane, Vinyl Functional Silane, Ethoxy Functional Vinyl Silane, Vinyl Silane Coupling Agent, Vinyltriethoxysilane Coupling Agent, VTES Coupling Agent, Vinyl Silane Adhesion Promoter, Vinyltriethoxysilane Adhesion Promoter, Vinyl Silane Crosslinker, Vinyltriethoxysilane Crosslinker, Vinyl Silane Monomer, Vinyltriethoxysilane Monomer, Vinyl Silane Modifier, Vinyltriethoxysilane Modifier, Silane Coupling Agent A-151, A-151 Silane, Silquest A-151, Dynasylan VTEO, Dynasylan VTES, DOWSIL Z-6518, Z-6518 Silane, KBE-1003, KBM-1003, Geniosil GF 56, Geniosil XL 10, KH-151, Co-Formula CFS-080, Industrial Vinyltriethoxysilane, Technical Grade Vinyltriethoxysilane
APPLICATIONS
Vinyltriethoxysilane is used as a coupling agent in polyethylene and EVA systems to enable moisture-curing crosslinking in silane-crosslinked cable compounds.
Vinyltriethoxysilane is incorporated into wire and cable insulation to improve mechanical properties and moisture resistance after crosslinking.
Vinyltriethoxysilane is used in silane-grafting processes where vinyl silane functionality is introduced into polymer chains.
Vinyltriethoxysilane is used in fiberglass and mineral-filled composites to improve filler wetting and interfacial adhesion.
Vinyltriethoxysilane is incorporated into glass fiber reinforced plastics to improve strength retention and reduce water-related property loss.
Vinyltriethoxysilane is used in mineral-filled polypropylene and polyethylene in selected applications to improve dispersion and mechanical performance.
Vinyltriethoxysilane is used in coatings and paints as an adhesion promoter to improve bonding to glass, metal oxides, and mineral substrates.
Vinyltriethoxysilane is incorporated into primers to increase moisture resistance and reduce delamination in compatible coating systems.
Vinyltriethoxysilane is used in sealants and adhesives to improve adhesion and durability on inorganic surfaces.
Vinyltriethoxysilane is used in crosslinkable polymer systems in selected applications to improve cure efficiency and network formation.
Vinyltriethoxysilane is incorporated into moisture-curing systems where silane hydrolysis and condensation create siloxane crosslinks.
Vinyltriethoxysilane is used in reactive formulations where improved interfacial bonding supports improved mechanical performance.
Vinyltriethoxysilane is valued because Vinyltriethoxysilane provides a reactive silane interface that bonds to inorganic surfaces while providing vinyl reactivity or grafting capability in organic polymer matrices.
Vinyltriethoxysilane is used as a silane coupling agent in polymer composites.
Vinyltriethoxysilane improves adhesion between organic polymers and inorganic surfaces.
Vinyltriethoxysilane is used in glass fiber treatment.
Vinyltriethoxysilane helps improve bonding between glass fibers and resin matrices.
Vinyltriethoxysilane is used in fiberglass-reinforced plastic production.
Vinyltriethoxysilane supports improved interfacial strength in composite materials.
Vinyltriethoxysilane is used in mineral-filled plastic formulations.
Vinyltriethoxysilane improves compatibility between polymer matrices and mineral fillers.
Vinyltriethoxysilane is used in polyethylene crosslinking applications.
Vinyltriethoxysilane enables moisture-curable silane-grafted polyethylene systems.
Vinyltriethoxysilane is used in wire and cable insulation compounds.
Vinyltriethoxysilane improves thermal, mechanical, and electrical performance in crosslinked polyethylene insulation.
Vinyltriethoxysilane is used in pipe and tubing materials.
Vinyltriethoxysilane supports moisture-cured crosslinking in polyethylene pipe systems.
Vinyltriethoxysilane is used in cable sheathing formulations.
Vinyltriethoxysilane helps improve durability and resistance to environmental stress.
Vinyltriethoxysilane is used in sealant formulations.
Vinyltriethoxysilane improves adhesion to glass, metal, ceramic, and mineral substrates.
Vinyltriethoxysilane is used in adhesive formulations.
Vinyltriethoxysilane acts as an adhesion promoter in moisture-curing systems.
Vinyltriethoxysilane is used in coating formulations.
Vinyltriethoxysilane improves coating adhesion and water resistance.
Vinyltriethoxysilane is used in primer formulations.
Vinyltriethoxysilane helps prepare inorganic surfaces for bonding with organic materials.
Vinyltriethoxysilane is used in construction chemical formulations.
Vinyltriethoxysilane improves adhesion and durability in sealants, coatings, and repair compounds.
Vinyltriethoxysilane is used in waterproofing formulations.
Vinyltriethoxysilane supports improved water resistance on compatible mineral surfaces.
Vinyltriethoxysilane is used in artificial stone and engineered stone systems.
Vinyltriethoxysilane supports bonding between resin binders and mineral aggregates.
Vinyltriethoxysilane is used in quartz composite formulations.
Vinyltriethoxysilane helps improve mechanical strength and moisture resistance.
Vinyltriethoxysilane is used in rubber compounding.
Vinyltriethoxysilane improves compatibility between elastomers and silica or mineral fillers.
Vinyltriethoxysilane is used in elastomer reinforcement systems.
Vinyltriethoxysilane supports better filler-polymer interaction in selected rubber materials.
Vinyltriethoxysilane is used in unsaturated polyester resin systems.
Vinyltriethoxysilane improves bonding to glass, silica, and mineral fillers.
Vinyltriethoxysilane is used in acrylic resin modification.
Vinyltriethoxysilane introduces reactive silane functionality into polymer structures.
Vinyltriethoxysilane is used in emulsion polymerization.
Vinyltriethoxysilane can provide vinyl functionality for copolymer formation.
Vinyltriethoxysilane is used in silane-modified polymer synthesis.
Vinyltriethoxysilane supports the preparation of moisture-curable hybrid polymers.
Vinyltriethoxysilane is used in surface modification of inorganic particles.
Vinyltriethoxysilane helps make mineral surfaces more compatible with organic media.
Vinyltriethoxysilane is used in ceramic and glass surface treatments.
Vinyltriethoxysilane helps create organofunctional surface layers.
Vinyltriethoxysilane is used in metal surface treatment systems.
Vinyltriethoxysilane improves adhesion between metal surfaces and organic coatings.
Vinyltriethoxysilane is used in anticorrosion coating systems.
Vinyltriethoxysilane helps enhance barrier properties and coating durability.
DESCRIPTION
Vinyltriethoxysilane is an organosilane with a vinyl group and three ethoxy groups bonded to silicon, and the ethoxy groups hydrolyze in the presence of water to form silanol groups that can condense to siloxane bonds.
Vinyltriethoxysilane acts as a coupling agent by bonding to hydroxylated inorganic surfaces such as glass or silica through siloxane linkages, and the vinyl functionality enables grafting or integration into organic polymer networks.
Vinyltriethoxysilane performance depends on controlled hydrolysis and condensation, and pH, water content, and catalysts strongly influence reaction rate and final bonding quality.
Vinyltriethoxysilane hydrolysis releases ethanol, and this creates safety considerations related to flammability and vapor exposure, so ventilation and ignition control are important.
Vinyltriethoxysilane is moisture sensitive and can polymerize or gel if exposed to water, so storage should minimize humidity and containers should be tightly sealed.
Vinyltriethoxysilane should be used according to applicable regulations and good industrial hygiene practices for the target market and facility.
Vinyltriethoxysilane should be stored away from strong acids and bases unless compatibility is verified, because catalysts and pH can accelerate hydrolysis and condensation.
Vinyltriethoxysilane should be handled with dry equipment and controlled addition to prevent premature gelation or loss of activity.
Vinyltriethoxysilane should be kept away from strong oxidizers and ignition sources due to solvent-like flammability behavior.
Vinyltriethoxysilane is an organofunctional silane containing vinyl and triethoxy groups.
Vinyltriethoxysilane is also known as triethoxyvinylsilane.
Vinyltriethoxysilane is typically supplied as a clear, colorless liquid.
Vinyltriethoxysilane has a characteristic alcohol-like or ester-like odor.
Vinyltriethoxysilane is reactive toward moisture because of its ethoxy groups.
Vinyltriethoxysilane can hydrolyze to form silanol groups.
Vinyltriethoxysilane can undergo condensation to form siloxane bonds.
Vinyltriethoxysilane can bond inorganic surfaces to organic polymer systems.
Vinyltriethoxysilane contains a vinyl group that can participate in radical polymerization.
Vinyltriethoxysilane is useful for grafting silane functionality onto polyolefins.
Vinyltriethoxysilane is compatible with many resins, plastics, fillers, and mineral substrates.
Vinyltriethoxysilane performance depends on hydrolysis conditions, catalyst system, and substrate surface chemistry.
Vinyltriethoxysilane improves adhesion by forming chemical bridges at material interfaces.
Vinyltriethoxysilane can improve moisture resistance in reinforced and filled polymers.
Vinyltriethoxysilane can improve mechanical strength in composite systems.
Vinyltriethoxysilane can help reduce filler agglomeration in selected formulations.
Vinyltriethoxysilane should be stored in tightly sealed containers.
Vinyltriethoxysilane should be protected from moisture, heat, and incompatible materials.
Vinyltriethoxysilane may release ethanol during hydrolysis.
Vinyltriethoxysilane should be handled with suitable ventilation and protective equipment.
Vinyltriethoxysilane is flammable and should be kept away from ignition sources.
Vinyltriethoxysilane quality may be defined by purity, color, moisture content, and hydrolyzable chlorine level.
Vinyltriethoxysilane is valued for combining polymer-reactive vinyl functionality with inorganic-reactive silane chemistry.
PROPERTIES
Chemical Formula: C8H18O3Si
Molecular Weight: 190.32 g/mol
Common Name: Vinyltriethoxysilane (VTES)
Chemical Type: Organosilane coupling agent; adhesion promoter; crosslinking silane
Appearance: Clear, colorless liquid
Odor: Characteristic odor
Solubility: Reacts with water (hydrolysis); soluble in many organic solvents; limited stability in water
Boiling Point: ~160–165°C (typical)
Flash Point: ~45–55°C (typical; flammable; grade dependent)
Density: ~0.89–0.90 g/cm³ (typical at 20°C)
Reactivity: Hydrolyzes with moisture; releases ethanol; condenses to siloxanes
Stability: Moisture sensitive; store dry and tightly sealed
Storage Temperature: 5–25°C, tightly closed, dry, well-ventilated, away from ignition sources
Shelf Life: Typically 12–24 months in original sealed packaging (supplier dependent)
FIRST AID
Inhalation:
Move to fresh air immediately.
Seek medical attention if symptoms such as headache, dizziness, or breathing discomfort occur.
Avoid breathing vapors because hydrolysis can release ethanol and irritating silane vapors.
Skin Contact:
Remove contaminated clothing and wash skin with soap and water.
Seek medical advice if irritation develops or persists.
Avoid prolonged contact because organosilanes and ethanol can irritate skin.
Eye Contact:
Rinse cautiously with water for at least 15 minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek immediate medical attention because eye exposure can be serious.
Ingestion:
Rinse mouth with water and do not induce vomiting.
Seek immediate medical attention or contact a poison center.
Never give anything by mouth to an unconscious person.
Note to Physicians:
Treat symptomatically.
Consider ethanol exposure risk from hydrolysis products in significant exposures.
Provide supportive care as needed.
HANDLING AND STORAGE
Handling:
Use appropriate PPE including chemical-resistant gloves, goggles or face shield, and protective clothing.
Work with dry equipment and minimize exposure to moisture and humidity.
Eliminate ignition sources and use grounding/bonding because the material is flammable and may release ethanol.
Ventilation:
Use local exhaust ventilation to control vapor levels.
Avoid handling in confined spaces without adequate ventilation.
Use explosion-proof ventilation and equipment where flammable vapors may be present.
Storage:
Store in tightly closed containers in a cool, dry, well-ventilated flammable liquids area.
Protect from moisture to prevent hydrolysis and ethanol release and to preserve activity.
Segregate from strong oxidizers and from acids or bases that can accelerate hydrolysis.
Spill and Leak Procedures:
Eliminate ignition sources and ventilate the area.
Contain spill with inert absorbent and collect into approved containers.
Prevent entry into drains and dispose of waste according to local regulations and facility procedures.
Handling Precautions:
Control moisture exposure because Vinyltriethoxysilane hydrolyzes and can lose activity and generate ethanol if exposed to water.
Optimize addition and catalyst conditions because hydrolysis/condensation control determines coupling performance and crosslink efficiency.
Use trained handling procedures for flammable, moisture-sensitive chemicals to minimize exposure risk and maintain product performance.
