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Trimethoxyvinylsilane is an organosilane coupling agent used to improve adhesion and compatibility between inorganic surfaces and organic polymers, and Trimethoxyvinylsilane is valued for enhancing bonding, moisture resistance, and mechanical performance in filled or reinforced systems.
Trimethoxyvinylsilane is widely used in wire and cable insulation, polyethylene crosslinking systems, fiberglass-reinforced composites, coatings, and adhesives, and Trimethoxyvinylsilane performance depends on purity, hydrolysis and condensation control, dosage, and the chemistry of the substrate and polymer matrix.
Trimethoxyvinylsilane is typically supplied as a clear, colorless liquid with characteristic odor, and Trimethoxyvinylsilane hydrolyzes in the presence of moisture and can release methanol, so handling requires moisture control, ventilation, and strict safety practices.
CAS Number: 2768-02-7
EC Number: 220-449-8
Molecular Formula: C5H12O3Si
Molecular Weight: 148.22 g/mol
Synonyms: Trimethoxyvinylsilane, Vinyltrimethoxysilane, VTMS, Vinyl Trimethoxy Silane, Silane Coupling Agent VTMS, Vinyltrimethoxysilane Monomer, Trimethoxy(vinyl)silane, Vinylsilane Trimethoxy, Organosilane Coupling Agent, VTMO Silane (naming), Vinyltrimethoxysilane Crosslinker, Vinyltrimethoxysilane Adhesion Promoter, Trimethoxyvinylsilane, Vinyltrimethoxysilane, Vinyl Trimethoxy Silane, Trimethoxy Vinyl Silane, VTMS, VTMOS, Vinyltrimethoxy Silane, Ethenyltrimethoxysilane, Ethenyl Trimethoxy Silane, Trimethoxyethenylsilane, Trimethoxy Ethenyl Silane, Silane, Ethenyltrimethoxy-, Silane, Vinyltrimethoxy-, Vinyltri(methoxy)silane, Tri(methoxy)vinylsilane, Trimethoxy(vinyl)silane, Methoxyvinylsilane, Vinylmethoxysilane, Organofunctional Vinyl Silane, Vinyl Functional Silane, Methoxy Functional Vinyl Silane, Vinyl Silane Coupling Agent, Vinyltrimethoxysilane Coupling Agent, VTMS Coupling Agent, Vinyl Silane Adhesion Promoter, Vinyltrimethoxysilane Adhesion Promoter, Vinyl Silane Crosslinker, Vinyltrimethoxysilane Crosslinker
APPLICATIONS
Trimethoxyvinylsilane is used as a coupling agent in polyethylene and EVA systems to enable moisture-curing crosslinking in silane-crosslinked cable compounds.
Trimethoxyvinylsilane is incorporated into wire and cable insulation to improve mechanical properties and moisture resistance after crosslinking.
Trimethoxyvinylsilane is used in silane-grafting processes where vinyl silane functionality is introduced into polymer chains.
Trimethoxyvinylsilane is used in fiberglass and mineral-filled composites to improve filler wetting and interfacial adhesion.
Trimethoxyvinylsilane is incorporated into glass fiber reinforced plastics to improve strength retention and reduce water-related property loss.
Trimethoxyvinylsilane is used in mineral-filled polypropylene and polyethylene in selected applications to improve dispersion and mechanical performance.
Trimethoxyvinylsilane is used in coatings and paints as an adhesion promoter to improve bonding to glass, metal oxides, and mineral substrates.
Trimethoxyvinylsilane is incorporated into primers to increase moisture resistance and reduce delamination in compatible coating systems.
Trimethoxyvinylsilane is used in sealants and adhesives to improve adhesion and durability on inorganic surfaces.
Trimethoxyvinylsilane is used in crosslinkable polymer systems in selected applications to improve cure efficiency and network formation.
Trimethoxyvinylsilane is incorporated into moisture-curing systems where silane hydrolysis and condensation create siloxane crosslinks.
Trimethoxyvinylsilane is used in reactive formulations where improved interfacial bonding supports improved mechanical performance.
Trimethoxyvinylsilane is valued because Trimethoxyvinylsilane provides a reactive silane interface that bonds to inorganic surfaces while providing vinyl reactivity or grafting capability in organic polymer matrices.
Trimethoxyvinylsilane is used as a silane coupling agent in polymer composites.
Trimethoxyvinylsilane improves adhesion between organic polymers and inorganic fillers.
Trimethoxyvinylsilane is used in glass fiber treatment.
Trimethoxyvinylsilane helps improve bonding between glass fibers and resin matrices.
Trimethoxyvinylsilane is used in mineral-filled plastic formulations.
Trimethoxyvinylsilane supports better dispersion of fillers in polymer systems.
Trimethoxyvinylsilane is used in polyethylene crosslinking applications.
Trimethoxyvinylsilane enables moisture-curable silane-grafted polyethylene systems.
Trimethoxyvinylsilane is used in cable insulation materials.
Trimethoxyvinylsilane improves thermal and mechanical performance in crosslinked polyethylene cables.
Trimethoxyvinylsilane is used in pipe and tubing materials.
Trimethoxyvinylsilane supports moisture-cured crosslinking in polyethylene pipe systems.
Trimethoxyvinylsilane is used in wire and cable compounds.
Trimethoxyvinylsilane helps improve insulation resistance and durability.
Trimethoxyvinylsilane is used in sealant formulations.
Trimethoxyvinylsilane improves adhesion to glass, metal, and mineral substrates.
Trimethoxyvinylsilane is used in adhesive formulations.
Trimethoxyvinylsilane acts as an adhesion promoter in moisture-curing systems.
Trimethoxyvinylsilane is used in coating formulations.
Trimethoxyvinylsilane improves coating adhesion and water resistance.
Trimethoxyvinylsilane is used in primer formulations.
Trimethoxyvinylsilane helps prepare inorganic surfaces for bonding with organic materials.
Trimethoxyvinylsilane is used in fiberglass-reinforced plastic production.
Trimethoxyvinylsilane improves interfacial strength in reinforced composites.
Trimethoxyvinylsilane is used in artificial stone and engineered stone systems.
Trimethoxyvinylsilane supports bonding between resin binders and mineral aggregates.
Trimethoxyvinylsilane is used in quartz composite formulations.
Trimethoxyvinylsilane helps improve mechanical strength and moisture resistance.
Trimethoxyvinylsilane is used in rubber compounding.
Trimethoxyvinylsilane improves compatibility between rubber polymers and silica fillers.
Trimethoxyvinylsilane is used in elastomer reinforcement systems.
Trimethoxyvinylsilane supports better filler-polymer interaction in selected elastomers.
Trimethoxyvinylsilane is used in unsaturated polyester resin systems.
Trimethoxyvinylsilane improves bonding to glass and mineral fillers.
Trimethoxyvinylsilane is used in acrylic resin modification.
Trimethoxyvinylsilane introduces reactive silane functionality into polymer structures.
Trimethoxyvinylsilane is used in emulsion polymerization.
Trimethoxyvinylsilane can provide vinyl functionality for copolymer formation.
Trimethoxyvinylsilane is used in surface modification of inorganic particles.
Trimethoxyvinylsilane helps make mineral surfaces more compatible with organic media.
Trimethoxyvinylsilane is used in moisture-curable polymer systems.
Trimethoxyvinylsilane participates in hydrolysis and condensation reactions.
Trimethoxyvinylsilane is used in construction chemical formulations.
Trimethoxyvinylsilane improves adhesion and durability in sealants, coatings, and repair compounds.
Trimethoxyvinylsilane is used in waterproofing formulations.
Trimethoxyvinylsilane supports improved water resistance on compatible mineral surfaces.
Trimethoxyvinylsilane is used in ceramic and glass surface treatments.
Trimethoxyvinylsilane helps create organofunctional surface layers.
Trimethoxyvinylsilane is used in metal surface treatment systems.
Trimethoxyvinylsilane improves adhesion between metal surfaces and organic coatings.
Trimethoxyvinylsilane is used in anticorrosion coating systems.
Trimethoxyvinylsilane helps enhance barrier properties and coating durability.
Trimethoxyvinylsilane is used in specialty resin synthesis.
Trimethoxyvinylsilane serves as a reactive monomer for silane-modified polymers.
Trimethoxyvinylsilane is used in research and development of hybrid organic-inorganic materials.
DESCRIPTION
Trimethoxyvinylsilane is an organosilane with a vinyl group and three methoxy groups bonded to silicon, and the methoxy groups hydrolyze in the presence of water to form silanol groups that can condense to siloxane bonds.
Trimethoxyvinylsilane 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.
Trimethoxyvinylsilane performance depends on controlled hydrolysis and condensation, and pH, water content, and catalysts strongly influence reaction rate and final bonding quality.
Trimethoxyvinylsilane hydrolysis releases methanol, and this creates safety considerations related to flammability and toxicity, so ventilation and exposure control are important.
Trimethoxyvinylsilane is moisture sensitive and can polymerize or gel if exposed to water, so storage should minimize humidity and containers should be tightly sealed.
Trimethoxyvinylsilane should be used according to applicable regulations and good industrial hygiene practices for the target market and facility.
Trimethoxyvinylsilane should be stored away from strong acids and bases unless compatibility is verified, because catalysts and pH can accelerate hydrolysis and condensation.
Trimethoxyvinylsilane should be handled with dry equipment and controlled addition to prevent premature gelation or loss of activity.
Trimethoxyvinylsilane should be kept away from strong oxidizers and ignition sources due to solvent-like flammability behavior.
Trimethoxyvinylsilane is an organofunctional silane containing vinyl and trimethoxy groups.
Trimethoxyvinylsilane is also known as vinyltrimethoxysilane.
Trimethoxyvinylsilane is typically supplied as a clear, colorless liquid.
Trimethoxyvinylsilane has a characteristic alcohol-like or ester-like odor.
Trimethoxyvinylsilane is reactive toward moisture because of its methoxy groups.
Trimethoxyvinylsilane can hydrolyze to form silanol groups.
Trimethoxyvinylsilane can undergo condensation to form siloxane bonds.
Trimethoxyvinylsilane can bond inorganic surfaces to organic polymer systems.
Trimethoxyvinylsilane contains a vinyl group that can participate in radical polymerization.
Trimethoxyvinylsilane is useful for grafting silane functionality onto polyolefins.
Trimethoxyvinylsilane is compatible with many resins, plastics, fillers, and mineral substrates.
Trimethoxyvinylsilane performance depends on hydrolysis conditions, catalyst system, and substrate surface chemistry.
Trimethoxyvinylsilane improves adhesion by forming chemical bridges at material interfaces.
Trimethoxyvinylsilane can improve moisture resistance in reinforced and filled polymers.
Trimethoxyvinylsilane can improve mechanical strength in composite systems.
Trimethoxyvinylsilane can help reduce filler agglomeration in selected formulations.
Trimethoxyvinylsilane should be stored in tightly sealed containers.
Trimethoxyvinylsilane should be protected from moisture, heat, and incompatible materials.
Trimethoxyvinylsilane may release methanol during hydrolysis.
Trimethoxyvinylsilane should be handled with suitable ventilation and protective equipment.
Trimethoxyvinylsilane is flammable and should be kept away from ignition sources.
Trimethoxyvinylsilane quality may be defined by purity, color, moisture content, and hydrolyzable chlorine level.
Trimethoxyvinylsilane is valued for combining polymer-reactive vinyl functionality with inorganic-reactive silane chemistry.
Trimethoxyvinylsilane is an important specialty silane for plastics, coatings, adhesives, sealants, and composite materials.
Trimethoxyvinylsilane is selected when adhesion promotion, surface modification, and moisture-curable crosslinking are required.
PROPERTIES
Chemical Formula: C5H12O3Si
Molecular Weight: 148.22 g/mol
Common Name: Trimethoxyvinylsilane (VTMS)
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: ~123–127°C (typical)
Flash Point: ~23–27°C (typical; flammable; grade dependent)
Density: ~0.97 g/cm³ (typical at 20°C)
Reactivity: Hydrolyzes with moisture; releases methanol; 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 methanol 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 methanol 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 methanol 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 methanol.
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 methanol 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 Trimethoxyvinylsilane hydrolyzes and can lose activity and generate methanol 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.
