- ▸ Coupling agent: Silane coupling agent for mineral-filled polymers
- ▸ Adhesion promotion: Adhesion promoter in coatings and composites
- ▸ Crosslinking: Crosslinker for moisture-curable polymer systems
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Vinyltrimethoxysilane (CAS 2768-02-7), VTMS, is a vinyl-functional trimethoxysilane of the silane coupling-agent class. Its hydrolyzable methoxy groups bond inorganic surfaces while the vinyl group reacts with polymers, making it an adhesion promoter and crosslinker for filled and moisture-curable polymer systems.
Frequently Asked Questions
What is vinyltrimethoxysilane used for?
Vinyltrimethoxysilane (VTMS, CAS 2768-02-7) is a vinyl-functional silane coupling agent. Its hydrolyzable methoxy groups bond inorganic/mineral surfaces while the vinyl group reacts with polymers, making it an adhesion promoter and crosslinker for filled and moisture-curable polymer systems.
What is a vinyl silane?
A vinyl silane is an organosilane with a reactive vinyl group and hydrolyzable alkoxy groups. In VTMS the three methoxy groups hydrolyze to bond inorganic fillers, while the vinyl group couples to the polymer matrix, so it acts as a coupling agent and crosslinker.
What is the structure and molecular weight of vinyltrimethoxysilane?
VTMS has formula C5H12O3Si: a silicon center bearing one vinyl group and three methoxy groups, with a molecular weight of about 148 g/mol. The methoxy groups are the hydrolyzable leaving groups that release methanol on cure.
How does VTMS differ from vinyltriethoxysilane (VTES)?
VTMS (methoxy, CAS 2768-02-7) hydrolyzes faster and releases methanol, while VTES (ethoxy, CAS 78-08-0) hydrolyzes more slowly and releases ethanol. Both are vinyl coupling agents; choice depends on desired cure rate and byproduct.
How is bulk vinyltrimethoxysilane packaged and priced?
VTMS ships under HS 2931.90 in drums and totes for polymer and coatings manufacturers. MOQ and pricing are volume-dependent and quoted per order; submit a bulk RFQ and request the CoA and SDS.