Vinyl Acetate Monomer EVA Grade HQ 3-5 · inhibitor 3-5 ppm
A copolymer feed grade on the lowest inhibitor band, intended for EVA plants sited close enough to the supply point that monomer is charged within days of delivery. The specification is the same vinyl acetate monomer; what changes is how the feed is timed against a continuous copolymer line and how little standing time the band allows.
Typical values, not for specification. Batch certificate governs delivery.
| VA purity | 99.9 wt% min (typical) |
|---|---|
| Water | 200 ppm max (typical) |
| Chemical name | Vinyl Acetate Monomer (VAM) |
| CAS / EINECS | 108-05-4 / 203-545-4 |
| Formula / MW | C4H6O2 / 86.09 |
| Appearance | Clear, colourless liquid, free of suspended matter |
| Acidity as acetic acid | ≤ 50 ppm (typical) |
| Acetaldehyde | ≤ 50 ppm (typical) |
| Methyl acetate | ≤ 50 ppm (typical) |
| Ethyl acetate | ≤ 250 ppm (typical) |
| Colour | ≤ 5 Pt-Co (typical) |
| Distillation range @760 mmHg | 72.3 – 73.1 °C |
| Density @20/20 °C | 0.9320 – 0.9345 g/cm³ |
|---|---|
| Boiling point | 72.7 °C |
| Melting point | − 93.2 °C |
| Flash point (closed cup) | − 8 °C |
| Autoignition temperature | 385 – 427 °C (source dependent) |
| Explosive limits in air | 2.6 – 13.4 vol% |
| Vapour pressure @20 °C | 11.7 kPa |
| Vapour density (air = 1) | 3.0 |
| Solubility in water @20 °C | ≈ 2 g/100 mL |
| Refractive index n20/D | 1.395 |
| Inhibitor (hydroquinone, HQ) | 3-5 ppm |
| Storage stability | Depends on temperature, oxygen availability and inhibitor consumption; periodic HQ and polymer re-test recommended |
A copolymer line notices feed that has been waiting. This section covers the turn-by-days model, the tank sizing behind it and the check that keeps a continuous line stable.
Design the receiving tank around a few days of copolymer consumption rather than a few weeks. On a continuous line the buffer exists to absorb a delivery delay, not to hold inventory, and a small tank keeps the oldest material in the system young.
Pair this band with a supply route measured in hours or a day rather than a voyage. The band and the radius are one decision: specifying the low band and then shipping it five weeks is a mismatch no receiving procedure can repair.
Take the analysis at the feed point to the reactor and compare it with the delivery result. The difference between the two is the plant contribution to the feed condition, and on a continuous line that is the number worth watching.
Stainless steel or aluminium only. Confirm the headspace practice against documented supplier guidance instead of assuming a nitrogen blanket is protective.
Match delivery frequency to consumption so the tank never sits half full for a week. A half-full tank has proportionally more headspace and more exposure per unit of product.
Watch water and acidity at the inlet alongside the inhibitor figure, since copolymer composition responds to all three rather than to inhibitor alone.
Stainless steel or aluminium, no copper or zinc in pumps and valves, and no rusted fittings in the feed path to the reactor.
Keep the feed area ventilated and free of ignition sources, and bond and earth during transfer. Vapour is heavier than air and remains uninhibited even when the liquid feed is protected.
Each route below links to the application map for the full grade set.
Continuous lines needing fresh, consistent feed
Copolymer plants with tight cycle times
Film-grade copolymer production
Copolymer lines with steady draw
Every export lot ships with a batch certificate of analysis.
Compare the inhibitor band, storage window and delivery form side by side.
Technical, knowledge and commercial notes written for this product line.
Send your required volume, delivery form and site for Celanese VAM EVA Grade HQ 3-5; we reply with the matching grade, the batch documentation and the shipping window.
+8615380400285
sales2@liwei-chem.com
+8615380400285
Fred Wang
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