POLYMER-GRADE MONOMER SUPPLY
Polymer-grade vinyl acetate monomer (CAS 108-05-4), supplied by Anhui Liwei Chemical Co., Limited to producers of PVAc, PVA, VAE and EVA.
Vinyl acetate monomer is the reactive building block behind emulsion adhesives, latex paints, textile sizes and EVA copolymers. What matters at the reactor is not the headline purity figure but whether every lot behaves the same way — same water content, same acidity, same inhibitor level, same induction period. That is the part of VAM supply we build the business around.
ABOUT THE COMPANY
Anhui Liwei Chemical Co., Limited supplies INEOS vinyl acetate monomer to polymer producers, adhesive formulators and coating manufacturers.
VAM is an unforgiving molecule to handle. It polymerises on contact with heat, light or certain metal ions. It is highly flammable, with a flash point close to −8 °C. Its specification drifts quickly once water enters the system, because water drives hydrolysis to acetaldehyde and acetic acid. Moving liquid is the easy part; controlling the conditions along the way is the actual work.
Anhui Liwei Chemical Co., Limited organises its VAM business around exactly that. We supply INEOS vinyl acetate monomer against the producer's published specification, keep it inhibited through every transfer, and release each lot against documented criteria for purity, water, acidity, aldehyde and inhibitor content. Our sourcing, inspection and dispatch functions work to internationally recognised quality standards, and third-party inspection at loading can be arranged on request.
For a polymer plant, the practical value is predictability. Quality that does not move between deliveries. Packaging sized to what the plant can consume before inhibitor levels drift. Export documentation completed before the vessel is booked, not while it waits at anchor. That is the standard we hold the supply chain to.
THE RISK
OUR CONTROL
PRODUCT
A colourless, mobile ester with a fruity odour — and one of the most versatile monomers in the coatings and adhesives chain.
INEOS VAM is vinyl acetate monomer, a clear liquid whose carbon–carbon double bond makes it more reactive than most commodity esters. It homopolymerises to polyvinyl acetate, hydrolyses to polyvinyl alcohol, and copolymerises with ethylene, vinyl chloride, acrylates and maleates to build materials with a very different balance of flexibility, adhesion and barrier performance. That same reactivity is the handling challenge. Heat, light, peroxide contamination or a depleted inhibitor will trigger spontaneous exothermic polymerisation, which is why commercial VAM is always supplied inhibited with hydroquinone and must be kept oxygen-bearing in storage. Our stock is held, sampled and dispatched inside those limits.
PVAc, PVOH, PVB, VAE, EVA, EVOH and vinyl-acrylic copolymers all start here.
Hydroquinone inhibited, with the level matched to your shipping and storage window.
From 190 kg drums to 20–22 t ISO tanks, so stock turns over before stability degrades.
TECHNICAL DATA
Physical and chemical properties per the international chemical safety card for vinyl acetate (ICSC 0347) and public reference data. Commercial limits are typical and vary with grade.
| Chemical name | Vinyl acetate monomer (VAM) |
|---|---|
| Synonyms | Ethenyl acetate; acetic acid vinyl ester; 1-acetoxyethylene |
| CAS number | 108-05-4 |
| EC number | 203-545-4 |
| UN number | 1301 (class 3, packing group II) |
| Molecular formula | C4H6O2 / CH3COOCH=CH2 |
| Molar mass | 86.09 g/mol |
| Appearance | Colourless liquid, characteristic fruity odour |
| Boiling point | 72.7 °C at 101.3 kPa |
| Melting point | −93.2 °C |
| Relative density (water = 1) | 0.93 at 20 °C |
| Relative vapour density (air = 1) | 3.0 |
| Vapour pressure | 11.7 kPa at 20 °C |
| Flash point | −8 °C (closed cup) |
| Auto-ignition temperature | 385 °C |
| Explosive limits in air | 2.6–13.4 vol% |
| Water solubility | approx. 20 g/L at 20 °C |
| Partition coefficient (log Pow) | 0.73 |
| Purity (vinyl acetate) | 99.5 % min. (premium grades to 99.9 %) |
|---|---|
| Water | 0.05–0.20 % max. |
| Acidity as acetic acid | 0.005–0.02 % max. |
| Acetaldehyde | 0.02 % max. (0.01 % for low-aldehyde grade) |
| Methyl acetate | 0.2 % max. |
| Colour (Pt-Co) | 5–10 max. |
| Inhibitor as hydroquinone | 3–20 ppm, set to customer requirement |
| Distillation range | 71.0–73.5 °C |
Values above are typical for polymer-grade material and depend on producer, plant and grade. Confirm the released specification for the lot you will receive before setting reactor parameters.
APPLICATIONS
VAM is rarely the end product. It is the monomer that decides how well the next material sticks, flexes or seals.
Wood adhesives, paper and board converting, packaging and laminating glues, textile bonding. VAM is fed under starved conditions into an aqueous emulsion to control chain transfer and molecular weight distribution.
Hydrolysed from PVAc, PVA carries VAM into textile sizing, paper coating and reinforcement, water-soluble film and protective colloids.
Copolymerised with ethylene into latexes for architectural paints, tile adhesives, waterproofing membranes and non-woven binders, with better flexibility and lower plasticiser demand than straight PVAc.
High-pressure copolymerisation with ethylene for solar encapsulant film, footwear midsoles, hot-melt adhesives and packaging film. Acetate content sets crystallinity, softness and tack.
VAM to PVAc to PVB, the interlayer that bonds laminated automotive and architectural safety glass.
Vinyl-acrylic copolymers for interior and exterior latex paints, paper coatings and industrial binders; the vinyl component contributes adhesion, the acrylate contributes weathering.
Beyond these, VAM also feeds vinyl chloride–acetate copolymers and EVOH barrier layers for coextruded packaging.
WHY CHOOSE US
What a monomer supplier actually has to get right.
Purity, water, acidity, aldehyde and inhibitor verified against documented criteria before a lot is released, not after it reaches your tank.
Hydroquinone level confirmed at loading and an oxygen-bearing headspace preserved in transit, so the inhibitor is still active on arrival.
Drums, IBCs or ISO tanks according to your monthly draw, so stock turns over before stability degrades.
UN-certified packaging, class 3 dangerous-goods documentation, verified weights and pre-shipment inspection prepared before the vessel closes.
Guidance on water, acidity and aldehyde tolerance limits for your route, whether that is emulsion, suspension or high-pressure copolymerisation.
Fred Wang handles the enquiry, the quotation, the shipping documents and the arrival. No handovers.
PACKAGING AND DELIVERY
VAM is a class 3 flammable liquid with a flash point near −8 °C. Packaging and storage are part of the specification, not an afterthought.
Hold VAM at roughly 15–25 °C, out of direct sunlight and away from heat, sparks, static discharge and strong oxidisers, acids or bases. Hydroquinone only works in the presence of oxygen: general practice is to keep 5–21 vol% oxygen in the tank headspace and never to rely on pure nitrogen blanketing, which deactivates the inhibitor and allows runaway polymerisation. Tanks are normally stainless steel 304L or 316L, aluminium, or epoxy-phenolic lined carbon steel; wet monomer held in unlined carbon steel can pick up iron and shift colour. Above 30 °C inhibitor depletion and acetaldehyde formation accelerate, so bulk stock should be turned over rather than stored warm.
Shipments move under UN 1301, class 3, packing group II, with dangerous-goods trained carriers. Packing lists, marks, safety documentation and certificates of origin are prepared before loading so that customs clearance does not become the bottleneck.
INSIGHTS
Hydroquinone protects VAM only while oxygen remains in the headspace. How temperature, tank material and turnover rate change inhibitor consumption — and what to check between deliveries.
The same molecule becomes an adhesive, a paint binder or a film resin depending on route, comonomer and polymerisation method. A practical comparison for buyers choosing between them.
Ethylene and acetic acid costs, planned cracker and VAM turnarounds, freight and regional supply balances all move the VAM number. A short guide to reading a quotation beyond the headline price.
FAQ
CONTACT
Send your specification, monthly volume and destination port. You will receive a priced quotation with packaging options and lead time.
+8615380400285
sales2@liwei-chem.com
+8615380400285
Fred Wang
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