Vinyl Acetate Monomer HQ 8-10 · inhibitor 8-10 ppm
For polyvinyl butyral and interlayer work, where the usual source of an off-spec batch is moisture rather than inhibitor level. The band carries a plant through a normal delivery cycle, and the grade is normally specified together with a water limit that the receiving team is expected to protect rather than test for after the fact.
Typical values, not for specification. Batch certificate governs delivery.
| 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 |
| VA purity | ≥ 99.9 wt% (typical) |
| Water | ≤ 200 ppm (0.02 wt%, typical) |
| 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) | 8-10 ppm |
| Storage stability | Depends on temperature, oxygen availability and inhibitor consumption; periodic HQ and polymer re-test recommended |
In a coastal plant the tank breathes every day, and each breath carries water. This section covers the practical defences and the checks that show whether they are still working.
A storage tank is not sealed. As the shell warms and cools the headspace expands and contracts, and every inward breath brings ambient air with its humidity. In a dry inland site this is a slow effect; in a coastal plant with a wide day-night swing it can move the water figure within a week. That is why the drying arrangement deserves the same attention as the inhibitor test.
The response is a combination rather than a single device. A desiccant on the vent, a slight positive pressure and a predictable fill-and-draw pattern all reduce the volume of moist air reaching the product. The check is not whether the desiccant is present but whether it is still active: a spent cartridge looks like a working one, and only a scheduled change with a written date distinguishes them.
Stainless steel or aluminium only. Confirm the headspace practice against documented supplier guidance instead of assuming a nitrogen blanket is protective.
Treat the water limit as a receiving control, not a laboratory formality. A routine check at intake catches a desiccant failure before the material reaches an interlayer batch.
Where drums are used for small additions, open them in a dry area and close them the same shift. A part-used drum in a humid store is the most common route for water to enter an otherwise well-run plant.
Consider a dry-air pad or a desiccant vent rather than an open vent on coastal sites, and shade the shell to reduce the daily breathing cycle that drives the whole problem.
Measure water with a method suited to the low levels involved and keep the trend. A single passing result says little; a rising line tells you the drying arrangement has stopped working.
Each route below links to the application map for the full grade set.
Interlayer resins sensitive to water content
Coastal binder plants with humid storage
Emulsion lines demanding a dry feed
Coating kitchens in humid climates
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 HQ 8-10; we reply with the matching grade, the batch documentation and the shipping window.
+8615380400285
sales2@liwei-chem.com
+8615380400285
Fred Wang
Scan to WhatsApp