| HS Code | 135985 |
| Product Name | Celanese Vinyl Acetate HQ 8-10 ECO-B |
| Chemical Name | Vinyl acetate |
| Cas Number | 108-05-4 |
| Molecular Formula | C4H6O2 |
| Molecular Weight | 86.09 g/mol |
| Purity | >= 99.9 wt% |
| Boiling Point | 72.7 °C |
| Melting Point | -93 °C |
| Flash Point | -8 °C (closed cup) |
| Autoignition Temperature | 427 °C |
| Vapor Pressure | 120 hPa at 20 °C |
| Density | 0.932 g/cm³ at 20 °C |
| Viscosity | 0.42 mPa·s at 20 °C |
| Water Solubility | 20 g/L at 20 °C |
| Appearance | Clear colorless liquid |
| Odor | Sweet, fruity, ester-like |
| Inhibitor Content | 8-10 ppm hydroquinone |
As an accredited Celanese Vinyl Acetate HQ 8-10 ECO-B factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 200-liter drums or 1,000-liter IBC totes, with bulk isotank options for larger quantities. |
| Container Loading (20′ FCL) | 20′ FCL: load Celanese Vinyl Acetate HQ 8-10 ECO-B in sealed, labeled drums/IBCs, secure firmly, ensure ventilation, and follow hazardous goods regulations. |
| Shipping | Ship Celanese Vinyl Acetate HQ 8-10 ECO-B as UN 1301, Vinyl Acetate, Stabilized, Class 3, Packing Group II. Use approved drums, IBCs, or tank containers. Keep away from heat, sparks, and oxidizers. Ensure proper labeling, ventilation, and inhibitor level verification before transport. Follow IMDG, IATA, or ADR regulations as applicable. |
| Storage | Store Cathay? Actually Celanese Vinyl Acetate HQ 8-10 ECO-B in tightly closed, properly grounded containers. Keep in a cool, dry, well-ventilated area away from heat, sparks, flames, sunlight, oxidizers, and polymerization initiators. Maintain temperature below 30°C to prevent polymerization. Ensure the hydroquinone inhibitor remains effective by avoiding excessive oxygen depletion in the headspace. Inspect periodically. |
| Shelf Life | Store tightly closed, cool, under nitrogen, away from light; shelf life is 12 months from production when stored properly. |
Vinyl acetate HQ 8-10 ECO-B is metered as the sole monomer into a 5,000 L glass-lined batch reactor for semi-batch production of poly(vinyl acetate) homopolymer emulsions used in non-structural wood assembly. The initial aqueous phase is prepared with deionised water at 80–120 parts per hundred monomer, partially hydrolysed poly(vinyl alcohol) protective colloid at 2–6 wt% of total monomer, nonionic ethylene oxide/propylene oxide surfactant at 0.5–2.0 wt%, and sodium bicarbonate buffer at 0.1–0.3 wt% to hold pH in the 4.0–5.5 range. Free-radical initiation is provided by potassium persulfate at 0.25–0.45 wt% based on monomer mass; the hydroquinone inhibitor present at 8–10 ppm lengthens the induction period, so plants running near the upper inhibitor limit commonly raise persulfate to 0.35–0.45 wt% or add 0.05 wt% sodium metabisulfite as a co-reducer. Reaction temperature is maintained at 70–80 °C with jacket cooling during the 3–4 h monomer feed, followed by a hold period and a redox finishing stage using tert-butyl hydroperoxide and sodium formaldehyde sulfoxylate to reduce residual free monomer below 0.1 wt%. A feed interruption longer than 15 min at 80 °C can produce coagulum due to monomer starvation; this failure mode is managed by redundant metering pumps and a control loop that ramps monomer feed on measured heat release rather than a fixed time schedule. The resulting dispersion reaches 50–60% solids, Brookfield RVT viscosity of 4,000–12,000 mPa·s at 20 rpm, and a mean particle diameter between 0.5–2.0 µm. Compliance for non-structural wood adhesives is assessed under EN 204 D3 classification and EN 205:2016 tensile shear strength; the finished adhesive is also checked for residual monomer under the producer's internal batch-release protocol, as no single harmonised European limit applies to this monomer in wood adhesives. The terminal products manufactured from this dispersion include D3 white woodworking glues, paper tube and core winding adhesives, bookbinding adhesives, and folding carton side-seam adhesives.
In low-temperature vinyl acetate-ethylene copolymer dispersion units, ethylene mass transfer rather than free-radical kinetics sets the practical ceiling for ethylene incorporation. Vinyl acetate HQ 8-10 ECO-B is copolymerised with ethylene at monomer ratios of 70–85 wt% vinyl acetate to 15–30 wt% ethylene in a 6,000 L stainless steel pressure reactor equipped with a pitched-blade turbine and internal cooling coils. The aqueous phase contains poly(vinyl alcohol) at 3–6 wt% and a nonionic surfactant at 0.5–1.5 wt%; redox initiation using ammonium persulfate and sodium erythorbate is held at 60–80 °C under ethylene partial pressures between 20–45 bar. The hydroquinone inhibitor at 8–10 ppm in the vinyl acetate feed is compensated by the redox system, but its effect on induction is more pronounced in low-temperature runs below 70 °C. Ethylene content is controlled not by a fixed addition ratio alone but by maintaining a constant ethylene partial pressure through automated ballast compensation, because dissolved ethylene participates in the polymerising phase. The agitator is operated at a tip speed of 3.5–4.0 m/s to increase mass transfer, but excessive shear raises coagulum formation and must be balanced against downstream filter pressure. The resulting dispersion typically has a solids content determined by ISO 3251:2019 in the range 50–58%, a glass transition temperature from -20 °C to +10 °C, and minimum film-forming temperature near 0 °C when formulated without coalescents. Emission testing of the formulated coating is conducted according to ISO 16000-6:2021 and the chamber method in DIN EN 16516:2020, while volatile organic compound limits follow Directive 2004/42/EC phase II and wet scrub resistance of the final coating is evaluated under ISO 11998:2006. The dispersion is subsequently compounded into interior wall paints, textured masonry coatings, carpet backing binders, and paper coating binders.
High-pressure bulk copolymerization of ethylene and vinyl acetate HQ 8-10 ECO-B is carried out in stirred autoclave or tubular reactors at pressures of 1,200–2,500 bar and temperatures of 150–300 °C. The vinyl acetate incorporation level in EVA resins is typically between 10–40 wt%, but photovoltaic encapsulant grades are specified in a narrower window of 28–33 wt% vinyl acetate to balance flexibility, optical transmission, and crosslinking density. Melt flow rate is the critical incoming resin specification because a drift beyond ±2 g/10 min at 190 °C/2.16 kg will shift cast film thickness on a 1.2 m wide chill-roll line and alter peroxide dispersion. The compounding formulation for an encapsulant sheet adds organic peroxide at 0.5–1.2 wt%, vinyl silane adhesion promoter at 0.3–0.5 wt%, ultraviolet stabiliser at 0.1–0.3 wt%, and antioxidants in a twin-screw extruder with an L/D ratio of 40:1 and a barrel profile from 90–110 °C. The cast film thickness is normally 0.4–0.6 mm, with line speed at 3–8 m/min and chill-roll temperature at 10–15 °C; the module lamination cycle at 140–150 °C must achieve a gel content above 70% by solvent extraction in xylene according to ASTM D2765-16. Compliance for the resin is anchored to ISO 1133-1:2022 for melt mass-flow rate and ASTM D1238-23 where North American specifications apply; final module qualification follows IEC 61215-1:2021 for terrestrial photovoltaic modules. The terminal product range includes EVA photovoltaic encapsulant films, hot-melt adhesive granules, footwear foam compounds, and coextruded packaging sealant webs.
Solution-grade vinyl chloride-vinyl acetate copolymer resins prepared with vinyl acetate HQ 8-10 ECO-B are standard binders for solvent-borne gravure and screen printing inks applied to rigid and plasticised PVC substrates. The comonomer feed ratio during solution polymerisation in methyl ethyl ketone is maintained at 10–15 wt% vinyl acetate to 85–90 wt% vinyl chloride, producing resins with a K-value of 35–60 determined by ISO 1628-2:2020 and a glass transition temperature near 70–80 °C. The polymerisation is conducted at 50–70 °C under a pressure of 5–8 bar, and the resin solution is then transferred to a gravure ink let-down where the binder content is set at 8–15 wt% of the finished ink, pigment at 10–20 wt%, ester/ketone solvent blend at 65–75 wt%, and processing aids at 1–3 wt%. Pigment dispersion is performed in a closed bead mill with a peripheral disc speed of 8–12 m/s, and the grind is monitored by a Hegman grind gauge until the drawdown reads 10–15 µm; let-down viscosity is controlled at 18–25 s Zahn #3. Compliance for electrical and electronic applications is verified against Directive 2011/65/EU RoHS and REACH (EC) 1907/2006; for packaging applications, the converter must separately confirm migration limits under Regulation (EU) 10/2011 because the final ink is not a food-contact material by itself. The resins are formulated into gravure printing inks for PVC credit-card stock, screen printing inks for rigid PVC signs, leather effect coatings, and aluminium foil overprint varnishes.
For textile warp sizing versus water-soluble film, the residual acetate group content separates the two markets. Polyvinyl alcohol produced via methanolysis of poly(vinyl acetate) begins with vinyl acetate HQ 8-10 ECO-B polymerised in bulk or solution to poly(vinyl acetate), then alcoholysed in methanol with sodium hydroxide catalyst at 0.3–0.8 wt% of poly(vinyl acetate) and a methanol-to-polymer ratio of 1.5–2.5:1. For textile warp sizing, the preferred degree of hydrolysis is 86.0–89.0 mol%, giving a 4% aqueous solution viscosity of 20–50 mPa·s at 20 °C; the sizing formulation is then prepared at 8–12 wt% PVOH solids, with wax at 0.2–0.5 wt% and urea at 1–2 wt% in the size bath. For cold-water-soluble detergent pouch film, the hydrolysis is pushed above 98 mol%, which makes the film insoluble at 20 °C but soluble in warm water; this is a deliberate processing boundary, not a defect. Residual monomer and methanol are controlled in the dried powder, and food-contact PVOH articles are evaluated under FDA 21 CFR 177.1670 where the end-use article requires regulatory clearance. The base resin is specified by ISO 15023-1:2017 for designation and specification, and the textile size is applied on multi-blade warp sizing machines at 70–80 °C to polyester/cotton yarns. The terminal products include sized warp yarns for weaving, water-soluble unit-dose detergent film, paper surface-sizing agents, and protective colloids for vinyl acetate emulsion polymerisation.
Spray-dried redispersible polymer powders derived from vinyl acetate-ethylene dispersions made with vinyl acetate HQ 8-10 ECO-B are incorporated into cementitious dry-mix mortars to raise adhesion and deformation capacity. The VAE dispersion is first produced with a glass transition temperature in the range -10 °C to 0 °C, then co-spray-dried with poly(vinyl alcohol) protective colloid and an anti-caking mineral filler of kaolin or calcium carbonate. The powder contains 85–95 wt% polymer and 8–12 wt% mineral anti-caking agent, with an outlet moisture below 0.5 wt% to prevent blocking. Spray dryer inlet air is held at 120–150 °C and outlet temperature at 70–80 °C; production experience shows that outlet relative humidity above 60% produces wall deposits and coarse agglomerates that later fail to redisperse. Atomiser wheel speed is typically 10,000–14,000 rpm, and the powder bulk density is controlled within 400–600 g/L. In a C2 tile adhesive formulation, the redispersible powder is added at 1.5–4.0 wt% of total dry mortar, with ordinary Portland cement at 30–40 wt%, graded silica sand at 60–65 wt%, cellulose ether at 0.3–0.5 wt%, and a low-dosage retarder according to ambient curing conditions. The mixed adhesive is tested under EN 12004:2007+A1:2012 for cementitious tile adhesives, and tensile adhesion strength after water immersion and heat ageing is determined by EN 1348:2007. The resulting dry-mix products include exterior tile adhesives, external thermal insulation composite system base coats, self-leveling underlayments, and repair mortars for concrete surfaces.
Competitive Celanese Vinyl Acetate HQ 8-10 ECO-B prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Celanese Vinyl Acetate HQ 8-10 ECO-B is a stabilized vinyl acetate monomer grade whose hydroquinone inhibitor is controlled to 8–10 mg/kg. The material carries CAS registry number 108-05-4, EC number 203-545-4, molecular formula C4H6O2, and molecular weight 86.09 g/mol. It is a clear, colourless liquid with a normal boiling point of 72.7 °C at 101.3 kPa, a density of approximately 0.934 g/cm³ at 20 °C, a vapour pressure of approximately 11.9 kPa at 20 °C, a closed-cup flash point of -8 °C, an autoignition temperature near 402 °C, and explosion limits in air of approximately 2.6–13.4 vol%. The ECO-B suffix denotes a mass-balance supply allocation under the manufacturer’s chain-of-custody framework; the allocated bio-based or bio-circular content is stated on the ISCC PLUS certificate for the specific lot and does not alter the chemical identity of the monomer. Synonyms include acetic acid vinyl ester and ethenyl acetate. As a monomer intermediate, the product is not a formulated polymer dispersion; it is the starting compound for polymerisation processes, not a ready-to-use adhesive or coating binder.
Under the product designation, the grade is intended as a feedstock for polyvinyl acetate, polyvinyl alcohol, ethylene-vinyl acetate, vinyl acetate-ethylene, and polyvinyl butyral. The specification profile is therefore designed around monomer purity, inhibitor concentration, and storage stability, not around final latex performance properties such as minimum film formation temperature or peel strength.
The grade is controlled against ASTM D2190 for stabilised vinyl acetate, with inhibitor measured by ASTM D2193 and acetaldehyde by ASTM D2191. Representative acceptance limits are shown in Table 1. The product-specific hydroquinone interval of 8–10 mg/kg is narrower than the general stabilised-material allowance in ASTM D2190 and is selected to balance storage stability against radical initiation. Acidity as acetic acid is limited to ≤0.005 wt% because free acetic acid can reduce pH in aqueous polymerisation or accelerate hydrolysis of the ester group during prolonged storage. Water is limited to ≤0.05 wt% to prevent hydrolysis of the monomer to acetic acid and acetaldehyde in storage tanks and high-temperature feed lines. Acetaldehyde is limited to ≤0.01 wt% because it is a chain-transfer agent in free-radical polymerisation and a precursor to colour bodies in polyvinyl alcohol and polyvinyl butyral. Colour is controlled to ≤5 Pt-Co to avoid carry-through of oxidised inhibitor species.
| Property | Limit | Reference method |
|---|---|---|
| Hydroquinone inhibitor | 8–10 mg/kg | ASTM D2193 |
| Purity | ≥99.9 wt% | ASTM D2190 gas chromatography |
| Acidity as acetic acid | ≤0.005 wt% | ASTM D2190 titration |
| Water | ≤0.05 wt% | ASTM E203 Karl Fischer titration |
| Acetaldehyde | ≤0.01 wt% | ASTM D2191 |
| Colour, Pt-Co | ≤5 | ASTM D1209 |
| Appearance | Clear, colourless liquid | Visual inspection |
During storage, trace water reacts slowly with vinyl acetate to form acetic acid and acetaldehyde; this reaction is acid-catalysed and accelerates in the presence of free acetic acid. The combined low water and low acidity limits therefore reduce the rate at which acetaldehyde accumulates in long-term storage. At temperatures above 30 °C, the hydrolysis rate increases and the hydroquinone inhibitor is consumed more rapidly, so both the specification and the storage boundary are required for lot integrity.
The narrow hydroquinone band is kinetically significant in emulsion polymerisation. A shift from 8 mg/kg to 10 mg/kg alters the quantity of inhibitor that must be consumed by primary radicals before steady propagation occurs. This is not a static induction period but a time-dependent radical scavenging process that is also affected by dissolved oxygen, monomer feed rate, and reactor temperature. Producers that run redox polymerisations at low temperature are more sensitive to the upper end of the HQ interval than producers running thermal persulfate initiation at higher temperature. Lot-to-lot variation within the certified interval is small, but it is sufficiently large that a controlled feed-forward adjustment of initiator is common when the measured HQ value changes.
At polyvinyl acetate emulsion plants, the monomer is metered into a jacketed stainless-steel reactor equipped with a reflux condenser and a pitched-blade turbine, typically alongside a protective colloid and an anionic or nonionic surfactant. The hydroquinone present at 8–10 mg/kg acts as a phenolic radical scavenger, consuming a portion of the initial radical flux during persulfate or redox initiation. Dissolved oxygen is removed by nitrogen sparging to below 0.5 mg/L because oxygen is a diradical co-retarder and can deplete the inhibitor in the monomer phase. In a continuous stirred-tank polymerisation, monomer conversion is monitored by headspace gas chromatography or reaction calorimetry; the monomer feed rate and initiator concentration are adjusted to maintain stable conversion and latex particle size distribution. On a pilot scale, the induction period should be measured in a 1–2 L jacketed reactor because published lot-specific kinetic data for HQ 8–10 ECO-B is limited. The low-concentration inhibitor does not require removal in normal emulsion recipes, but process operators often trim initiator dosing using the hydroquinone value on the certificate of analysis. If the monomer is switched from a 3–5 mg/kg grade to HQ 8–10 ECO-B without adjustment, a longer induction period or a lower initial exotherm may be observed.
For polyvinyl alcohol resin production, the monomer is polymerised in bulk or solution and subsequently hydrolysed. Acetaldehyde at the specification limit of 0.01 wt% participates in chain-transfer reactions and can generate chromophores during hydrolysis; water above 0.05 wt% reduces molecular weight in non-aqueous polymerisation and can cause premature acetate hydrolysis in hot zones. The HQ interval contributes to colour control in the isolated polyvinyl alcohol intermediate because oxidised hydroquinone species can form coloured quinones. Compared with a 12–17 mg/kg VAM grade, HQ 8–10 ECO-B reduces the total inhibitor mass available for carryover into the polymer, but compared with a 3–5 mg/kg grade it provides additional stabilisation during ambient storage. Process developments should verify the induction time and molecular weight distribution after switching because phenolic inhibitors can affect the radical balance even at low mass concentrations.
The ECO-B suffix does not describe a different monomer composition. It identifies a supply-chain allocation under an ISCC PLUS-certified mass balance system, in which bio-based or bio-circular feedstock is assigned to specific lots of vinyl acetate while the physical product remains chemically identical to conventional hydroquinone-inhibited VAM. The allocated renewable carbon fraction is a lot-level accounting attribute and cannot be measured by gas chromatography or infrared spectroscopy on the monomer. Users can retain existing polymerisation recipes based on CAS 108-05-4; the operational difference is limited to documentation procedures, Scope 3 greenhouse gas accounting, and downstream sustainability claims tied to the allocated material. Table 2 compares the grade with conventional hydroquinone-inhibited VAM intervals. The selection among HQ intervals is primarily a storage-stability and polymerisation-induction trade-off, not a purity distinction.
| Characteristic | HQ 8–10 ECO-B | HQ 3–5 conventional | HQ 12–17 conventional |
|---|---|---|---|
| Hydroquinone interval | 8–10 mg/kg | 3–5 mg/kg | 12–17 mg/kg |
| Storage inhibition reserve | Intermediate | Lower | Higher |
| Radical initiator demand | Moderate | Lower | Higher |
| Inhibitor carryover potential | Intermediate | Lower | Higher |
| Mass-balance bio-based allocation | Available as ECO-B | Not typically available | Not typically available |
Because the material is classified as a flammable liquid with a closed-cup flash point of -8 °C and a vapour pressure of approximately 11.9 kPa at 20 °C, storage must occur in closed, grounded tanks under nitrogen blanketing. Prolonged storage above 30 °C can accelerate thermal initiation and consume the hydroquinone inhibitor. The product should not be exposed to air for extended periods; oxygen can form peroxides that reduce effective inhibitor concentration and increase the likelihood of undesired polymerisation. Incompatibilities include strong oxidisers, peroxides, strong acids, and strong bases. The vapour is denser than air; local exhaust ventilation and continuous flammable-vapour detection are required in process buildings. Transport classification is UN 1301, Vinyl acetate monomer, stabilised, Class 3, Packing Group II. Bulk storage tanks should be equipped with pressure-vacuum vents or inert-gas blanketing and should not contain dead zones where stratification can occur.
For polymerisation processes requiring low inhibitor carryover, the HQ 8–10 interval is generally not removed by distillation; process operators compensate by purging oxygen, adjusting initiator concentration, or adding a reducing agent to the aqueous phase. Published data for distillation-based inhibitor removal at this specific interval is limited, so process development should be conducted in a pilot reactor with full exotherm monitoring. If the monomer is to be used in UV-cured or controlled radical systems, additional inhibitor stripping may be required, but this must be evaluated against the resulting loss of stabilisation during hold time.
Ethylene-vinyl acetate copolymer reactors accept VAM as a comonomer in high-pressure tubular or autoclave units. The phenolic inhibitor at 8–10 mg/kg is significant because free-radical polymerisation in supercritical ethylene is sensitive to radical traps; reducing the inhibitor from 12–17 mg/kg to 8–10 mg/kg can reduce initiation load while retaining safer storage than a 3–5 mg/kg grade. The low water specification of 0.05 wt% prevents hydrolysis of the acetate group in high-temperature zones, and the acidity limit reduces corrosion in high-pressure feed lines. VAM is also used in medium-pressure vinyl acetate-ethylene dispersion polymerisation, where the monomer is fed into a pressure reactor with ethylene and an aqueous emulsion phase. The ECO-B designation can be transferred to downstream EVA or VAE dispersions if the full mass-balance chain of custody is maintained through polymerisation, stripping, and blending.
In polyvinyl butyral production, the VAM is first converted to polyvinyl alcohol and then reacted with butyraldehyde. Aldehyde and acidity limits remain critical because residual aldehydes compete in the acetalisation step; the 0.01 wt% acetaldehyde limit helps maintain predictable acetalisation stoichiometry. The hydroquinone interval contributes to colour control in the isolated polyvinyl alcohol intermediate, while the mass-balance designation can be transferred to downstream sustainability documentation if the supporting chain-of-custody records are maintained. Polyvinyl butyral producers relying on low-inhibitor VAM may need to evaluate initiator carryover in the polymerisation and saponification steps when switching to a grade with 8–10 mg/kg HQ.
Regulatory compliance is supported by REACH registration under EC 203-545-4 and the harmonised classification in the safety data sheet. The monomer as supplied is not intended for direct food contact; compliance for derived polymers must be assessed under the applicable food-contact regulation, such as 21 CFR 175.105 for adhesives or regional migration directives. The product is not formulated for consumer handling and should be processed only in closed industrial systems with engineering controls for flammability and vapour exposure.
