Product Introduction
Vinyl Acetate Monomer (CAS 108-05-4), commonly referred to as VAM, is a key industrial building block used globally in the production of a wide range of polymers and resins. It is a colorless, volatile liquid with a characteristic sharp, fruity odor. VAM is highly reactive and readily undergoes polymerization and copolymerization, making it indispensable for manufacturing polyvinyl acetate (PVAc), ethylene-vinyl acetate (EVA), and polyvinyl alcohol (PVA). These derivatives are essential components in adhesives, paints, paper coatings, and textile finishes.
Product Selling Points
1. High Polymerization Reactivity
-
Advantage: Readily copolymerizes with a wide variety of monomers like ethylene, acrylics, and vinyl chloride.
-
Benefit: Versatile Manufacturing: Enables the production of tailored polymers with specific flexibility, adhesion, and clarity for diverse industrial applications.
2. Exceptional Purity (≥ 99.9%)
-
Advantage: Minimal impurities such as acetaldehyde or ethyl acetate.
-
Benefit: Process Stability: Ensures consistent reaction rates and high-quality end-products, preventing undesired side reactions in sensitive polymerization processes.
3. Controlled Stabilization
-
Advantage: Precisely inhibited with HQ (Hydroquinone) or MEHQ to prevent premature polymerization.
-
Benefit: Safe Handling & Storage: Provides peace of mind during long-distance shipping and storage, ensuring the monomer remains liquid and reactive only when intended.
Applications
Adhesives & Sealants
The primary raw material for Polyvinyl Acetate (PVAc) emulsions, widely used as “white glue” for wood, paper, and packaging.
Copolymer Production (EVA & VAE)
Copolymerized with ethylene to produce EVA resins for footwear and solar cell encapsulation, or VAE emulsions for environmentally friendly paints.
Polyvinyl Alcohol (PVA) Synthesis
Acts as the precursor for PVA, which is used in water-soluble films, textile sizing, and as a thickener in various formulations.
Coatings & Textiles
Used in the manufacture of acrylic-vinyl copolymers for architectural paints and as a binder in non-woven textiles and paper saturated products.
Packaging & Storage
-
Packaging: 190kg UN-certified steel drums; ISO tanks for bulk shipment.
-
Storage: Store in a cool, dry, and well-ventilated fireproof area. Crucial: Keep away from direct sunlight, heat, and sparks. VAM is light-sensitive and highly flammable. Maintain inhibitor levels and avoid storing under an inert atmosphere that completely excludes oxygen (as some inhibitors require trace oxygen to function).
Synonyms
VAM; Vinyl acetate monomer; Ethenyl ethanoate; Acetic acid vinyl ester; 1-Acetoxyethylene.
Matching Materials
-
Ethylene (CAS 74-85-1) —— Co-monomer for EVA and VAE copolymer production
-
Acetic Acid (CAS 64-19-7) —— Key raw material in the synthesis of VAM
-
Polyvinyl Alcohol (CAS 9002-89-5) —— Derivative product often used alongside VAM emulsions as a stabilizer
-
Dibutyl Phthalate (DBP) (CAS 84-74-2) —— Plasticizer often added to VAM-based adhesives
-
Potassium Persulfate (CAS 7727-21-1) —— Initiator for VAM emulsion polymerization
-
Butyl Acrylate (CAS 141-32-2) —— Co-monomer for producing vinyl-acrylic exterior paints
-
Hydroquinone (CAS 123-31-9) —— Inhibitor used to stabilize VAM during storage
FAQ
Q: Why is VAM always shipped with an inhibitor?
A: VAM is highly reactive and can undergo spontaneous, exothermic polymerization if exposed to heat or light. Inhibitors like HQ prevent this, ensuring the product remains stable during transport.
Q: Can VAM be used in food-contact adhesives?
A: Yes, derivatives of VAM (like PVAc) are commonly used in food packaging adhesives, provided they meet specific FDA or local regulatory requirements for migration limits.
Q: How does VAM differ from Ethyl Acetate?
A: While they have similar names and smells, VAM contains a reactive double bond (vinyl group) making it a monomer for plastics, whereas Ethyl Acetate is a stable solvent.
Q: What is the shelf life of Vinyl Acetate Monomer?
A: Generally 6 months when stored in original sealed containers at temperatures below 25°C. Inhibitor levels should be checked if stored for extended periods.
Q: Is VAM considered an environmental hazard?
A: VAM is biodegradable and has low bioaccumulation potential. However, due to its flammability and volatility, it must be handled according to strict safety and environmental protocols to prevent spills.
