| HS Code | 165695 |
| Appearance | white milky liquid |
| Solid Content Percent | 55.0 ± 1.0 |
| Viscosity Mpa S | 1500 - 3500 |
| Ph | 6.0 - 8.0 |
| Glass Transition Temperature C | -10 |
| Minimum Film Forming Temperature C | 0 |
| Particle Size Micron | 0.1 - 0.5 |
| Free Formaldehyde Ppm | ≤ 10 |
| Voc Content G Per L | ≤ 5 |
| Phenol Content Percent | 0.00 |
As an accredited Industrial Grade Non-Phenol Eco VAM (Cost-Effective Interior VAE) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 200 kg sealed drums or 1,000 kg IBC totes, ensuring safe handling, transport, and storage efficiency. |
| Container Loading (20′ FCL) | 20′ FCL: non-phenol eco VAM/VAE in sealed drums, palletized, secured, ventilated, labeled, and documented for safe transport. |
| Shipping | Shipping: Supplied in 200kg drums, IBC totes, or bulk tankers. Store at 5–35°C, protected from frost and sunlight. Transport as non-hazardous aqueous dispersion; keep containers sealed to prevent leakage and contamination. Avoid excessive heat during transit. Proper storage ensures six months shelf life. |
| Storage | Store in tightly sealed, original containers in a cool, dry, well-ventilated area, away from direct sunlight, heat, sparks, and strong oxidizers. Maintain temperatures between 5–35°C to prevent freezing or degradation. Keep away from acids, bases, and phenol sources. Use explosion-proof equipment and grounding; inspect regularly for leaks or container damage. |
| Shelf Life | Shelf life: 12 months from manufacture when stored sealed, cool, dry, and away from direct sunlight. |
In interior high-PVC flat and eggshell formulations where coalescent demand must stay below 10 g/L total VOC, VAE copolymer dispersion produced from industrial-grade non-phenol VAM is evaluated at 12–15 wt% binder solids on total formulation. The critical processing step is not the let-down but the pigment dispersion phase: a 45 kW Cowles dissolver operating at 1100–1300 rpm with a 350 mm blade in a 1000 L tank disperses rutile TiO₂, calcined clay, and 700–900 g/L calcium carbonate to a Hegman gauge reading of 5–6 before the VAE binder is added at 400–600 rpm. Wet scrub resistance per ASTM D2486-23 typically remains above 400 cycles for 60% PVC flats if the VAE solids are 54–56% and the MFFT per ISO 2115 is between 0°C and 2°C, eliminating butyl carbitol coalescent. The non-phenol inhibitor package in the monomer reduces hydroquinone-derived yellowing when the dried film is exposed to alkaline fillers, measured as Δb* after 14 days at 50°C per ASTM D2244-23. A restriction applies at pH > 9.5, where the VAE dispersion shows viscosity drift above 12% after 14 days in HEC-thickened base.
Vinyl acetate-ethylene emulsion polymerization at 50–65°C and 15–30 bar ethylene partial pressure normally uses a redox initiation system: ammonium persulfate oxidant at 0.08–0.15 wt% on VAM and sodium metabisulfite reductant at 0.04–0.08 wt% on VAM, with delayed oxidant feed over 3–4 h. If the monomer feed contains a non-phenolic inhibitor, the induction period is extended by 20–40 min compared to hydroquinone-stabilized VAM at 0.5–1.0 ppm inhibitor concentration. This requires a modified oxidation-reduction potential control setpoint of +120 to +180 mV vs. Ag/AgCl, not a fixed dosage curve. Production-scale reactors of 15–20 m³ with double-turbine agitation at 80–120 rpm exhibit temperature overshoot of 3–5 K if the oxidant is front-loaded, because inhibitor consumption accelerates chain initiation, releasing heat at 350–400 kJ/kg VAM. Residual vinyl acetate monomer must be stripped to ≤ 500 mg/kg per ISO 13741-1 by post-polymerization vacuum distillation at 60–70°C and 0.4–0.6 bar, followed by nitrogen sparging. The limit of compatibility occurs when the non-phenol inhibitor is amine-based; such inhibitors are not used with ammonium persulfate due to pH shift and premature radical scavenging. In that case, pre-stripping with nitrogen at 40°C for 30 min is mandatory before the monomer enters the reactor feed tank.
| Property | Test method | Acceptance range |
|---|---|---|
| Non-volatile content | ISO 3251 | 54–56% |
| pH | ISO 976 | 4.0–5.5 |
| Brookfield viscosity RVT 4/20 @ 25°C | ISO 1652 | 800–1500 mPa·s |
| Minimum film-forming temperature | ISO 2115 | 0–2°C |
| Residual vinyl acetate monomer | ISO 13741-1 | ≤ 500 mg/kg |
| VOC content | ISO 11890-2 | < 5 g/L |
| Particle size D50 | ISO 13320 | 0.3–0.8 µm |
| Freeze-thaw stability | ISO 1147 | ≥ 3 cycles at -5°C |
D3-grade interior wood bonding in laminated furniture edge bands and paper-over-medium laminates uses a VAE dispersion of 55±1% solids, pH 4.5–5.5, and Brookfield viscosity of 1200–1800 mPa·s at 25°C per ISO 1652. A roller coater applies 40–70 g/m² wet weight to 0.4–0.8 mm veneer or melamine-impregnated paper, followed by cold pressing at 0.4–0.8 N/mm² for 20–40 min at 20–25°C. EN 204 D3 classification requires tensile shear strength above 4.0 N/mm² after 7 days at 23°C/50% RH; D3-grade VAE normally meets 4.2–5.6 N/mm² on beech, but the lower plasticizer content in cost-effective interior grades shifts the failure mode from cohesive to mixed adhesive-cohesive at press times below 15 min. The non-phenol monomer residue reduces the risk of hydroquinone migration into light-coloured oak veneer, where phenolic staining is visible as yellow-brown edge bleed after 30 days at 40°C. This grade is not suitable for D4 or exterior applications; continuous water contact at > 60°C causes re-emulsification and shear strength loss above 50% after 24 h immersion per EN 204 D4 sequence.
Nonwoven air-laid and carded webs for indoor filtration media, mattress felt, and furniture padding are spray-bonded with VAE dispersions at 8–12% solids after dilution from 55% original solids. The spray system operates at 2.5–4.0 bar atomizing air pressure with 0.8–1.2 mm nozzle tips; binder add-on is controlled gravimetrically to 10–20 g/m² in a 100 m/min line. Curing in a through-air oven at 130–150°C for 20–40 s must remove water without causing skinning; the non-phenol inhibitor package influences the drying curve only after the film is formed, where residual non-volatile stabilizer content above 0.2% on binder solids can raise the blocking point by 3–5°C. For indoor furniture padding, VOC emission is measured by ISO 16000-6 after 3 days; total VVOC should remain below 250 µg/m³. Industrial-grade non-phenol VAM helps avoid hydroquinone contribution to the volatile organic compound sum, but this does not make the binder suitable for medical-grade skin contact; ISO 10993-5 cytotoxicity classification is not completed on industrial polymer unless separately validated.
Because spray-dried VAE powders from non-phenol VAM are incorporated at 2.0–3.5 wt% into C1-grade interior tile adhesives and parquet leveling compounds, the spray-drying step governs later redispersibility. Spray drying of the VAE dispersion is performed on a single-fluid nozzle atomizer at inlet 120–140°C and outlet 50–70°C; the powder must be pre-blended with cement and sand before water addition to prevent lump formation in a 120 L horizontal mixer at 60–80 rpm. EN 12004 C1 tensile adhesion of the cured tile adhesive on concrete after 28 days dry storage is 0.5–0.8 N/mm²; after 21 days water immersion, the value typically falls to 0.4–0.6 N/mm². The non-phenol monomer reduces the characteristic hydroquinone odour when the dry-mix is wetted in enclosed interiors, but the powder has no plasticizing effect on cement hydration. A key processing limit is the spray-drying inlet temperature; above 160°C the polyvinyl alcohol protective colloid yellows, and the resulting powder loses redispersibility, measured as a 10% powder slurry retention below 8% on a 45 µm sieve after 10 min at 20°C. The redispersible powder must be stored below 60% RH; above 70% RH caking increases sieve retention above 15%.
Pigment coating of interior folding-box board and offset paper uses VAE latex as cobinder at 12–20 parts per 100 parts calcium carbonate / kaolin pigment. In a high-speed blade coater running 700–1000 m/min, the coating colour solids are 58–65%, and the Brookfield viscosity at 100 rpm must stay within 800–1200 mPa·s to prevent streaking. The VAE dispersion with non-phenol VAM shows similar high-shear stability to standard grades; after 30 min under a Cowles dissolver at 4000 rpm, the change in viscosity should be below 10%. The non-phenol stabilizer package reduces the hydroquinone-derived odour in the coated paper after drying at 110–130°C, which is relevant for indoor point-of-sale displays. However, the grade is not approved for direct food contact under FDA 21 CFR 176.170 or BfR XXXVI unless a separate migration study is completed. Because the VAE is softer than styrene-acrylate binders, the coated surface shows higher dry pick resistance but lower wet pick resistance; IGT printability tests at 2.0 m/s with 15 µL ink show dry pick above 80 cm/s but wet pick below 35 cm/s.
Tufted carpet for residential interiors receives a pre-coat of 700–900 g/m² wet VAE compound filled with 350–500 parts calcium carbonate per 100 parts binder dry. The compound is foamed to 0.6–0.8 g/cm³ by mechanical whipping in a batch foamer at 600–800 rpm, then applied by a knife-over-roll coater before secondary backing lamination. Curing in a gas-fired oven at 120–150°C for 8–12 min must volatilize water and ammonia without causing back-coat bubbling. The non-phenol VAM-derived VAE reduces residual hydroquinone emission during this thermal cure, which lowers the indoor carpet odour profile measured by ISO 16000-6 after 3 days; total VOC release remains below 300 µg/m³ in the 10–20 mg/m² range for the finished carpet. A processing boundary appears at filler loading above 550 parts per 100 parts binder, where the wet compound viscosity exceeds 12000 mPa·s and the knife coater gap must be opened beyond 2.5 mm, increasing backing weight variation by more than 8%. This cost-effective interior grade is intended for residential indoor carpet, not for automotive or outdoor carpet where UV and exhaust exposure exceed the unpigmented VAE resistance.
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Industrial Grade Non-Phenol Eco VAM, model NP-VAM-99.9-IG, is a vinyl acetate monomer stabilized with a non-phenolic free-radical inhibitor package developed for cost-sensitive interior vinyl acetate-ethylene (VAE) copolymer emulsion polymerization. The product is produced in continuous acetylation trains and supplied as a clear, colorless liquid with a typical purity of 99.9 wt% or greater by gas chromatography in accordance with ASTM D2190. Residual acidity is held below 0.005 wt% as acetic acid, water is limited to 0.05 wt% by Karl Fischer titration, and color is controlled to 5 Pt-Co units or lower. The non-phenolic inhibitor system is free of hydroquinone, 4-methoxyphenol, and catechol derivatives; it uses a nitroxyl-based radical scavenger that does not contribute a UV-active aromatic absorption band in the 270–320 nm range. This property is relevant for interior VAE films where low yellowing potential and reduced aromatic extractables are required. The monomer is not a direct drop-in for all formulations: emulsions that rely on phenolic synergists or hydroquinone as a chain-transfer modifier may require reformulation and revalidation of initiator ratios.
| Property | Specification limit or typical range | Test method |
|---|---|---|
| Purity | ≥ 99.9 wt% | GC, ASTM D2190 |
| Free acidity as acetic acid | ≤ 0.005 wt% | Titration, ASTM D2190 |
| Water | ≤ 0.05 wt% | Karl Fischer, ASTM D2190 |
| Color | ≤ 5 Pt-Co | ASTM D1209 |
| Non-phenolic inhibitor | 5–15 mg/kg | HPLC, internal method with iodometric confirmation |
| Acetaldehyde | ≤ 0.01 wt% | GC, internal method |
| Methyl acetate | ≤ 0.02 wt% | GC, internal method |
| Distillation range | 72.0–73.5 °C | ASTM D1078 |
In typical interior VAE polymerization, NP-VAM-99.9-IG is the dominant vinyl monomer in semi-batch emulsion copolymerization. Reactors are operated between 55 °C and 90 °C under ethylene partial pressures of 20–80 bar, with monomer fed over 3–6 h while free monomer is maintained below 5 wt% of reactor contents. The non-phenolic inhibitor exerts a measurable effect on nucleation. Because the scavenging load is lower than that of hydroquinone-stabilized monomer, the initial oxidizer charge may need to be reduced by 5–10% on a molar basis; if not adjusted, seed particle counts can overshoot and increase reactor viscosity beyond the jacket heat-transfer capacity of a 12,000 L unit with 350 kW cooling. Batch-to-batch induction time variation is minimized when the inhibitor level is kept within 5–15 mg/kg; below that band, oxygen ingress during transfer can cause runaway nucleation, while above it initiation becomes sluggish and conversion may plateau at 60–70% of monomer feed.
Physical properties relevant to feed system design are: molecular weight 86.09 g/mol, density 0.934 g/cm³ at 20 °C, viscosity 0.43 mPa·s at 20 °C, and boiling point 72.5 °C at 101.3 kPa. Metering pumps should use PTFE or EPDM internals; diaphragm pumps with natural rubber or neoprene components are unsuitable because solvent absorption causes seal swelling and premature failure. The product is flammable and should be handled as a reactive liquid rather than a passive solvent.
Conventional vinyl acetate monomer is stabilized with hydroquinone or 4-methoxyphenol at levels between 3 mg/kg and 20 mg/kg to suppress premature polymerization during storage and handling. Although effective as a shelf-life inhibitor, hydroquinone leaves a phenolic residue that can migrate in VAE films and contribute to yellowing under alkaline filler packages or ultraviolet exposure. The non-phenolic inhibitor used in NP-VAM-99.9-IG is based on a nitroxyl radical system with no aromatic hydroxyl group; liquid chromatography of the monomer shows no distinct absorbance band in the 270–320 nm region commonly associated with phenolic inhibitors. This difference becomes relevant for interior paints formulated with calcined clay and calcium carbonate, where phenolic residues can chelate with iron and create localized discoloration. Film evaluations under ASTM D2244 after accelerated weathering in a xenon-arc chamber have shown reduced ΔE in low-VOC interior flats when non-phenolic monomer replaces phenolic-stabilized VAM; however, independent published data for this specific configuration is limited.
Kinetic differences are more complex. Hydroquinone acts as a phenolic chain-transfer agent and can be incorporated into low molecular weight oligomers during polymerization, whereas the nitroxyl inhibitor undergoes reversible termination without forming stable covalent adducts. In redox systems using ammonium persulfate and sodium metabisulfite at 0.5–1.5 wt% total initiator based on monomer, the non-phenolic system may require a lower bisulfite feed to maintain the same radical flux. If the bisulfite feed is not adjusted, residual sulfite can react with the nitroxyl group and regenerate the active inhibitor, causing a mid-feed conversion plateau and elevated free monomer at 60–70% of total feed. Plant data from twin-screw devolatilizing extruder stripping lines show that this mid-feed plateau is eliminated when the oxidant-to-reductant molar ratio is reduced from 1.0:1.0 to 0.85:1.0; however, this is equipment-specific and should be verified by calorimetric reaction monitoring.
Storage and handling boundary conditions apply. NP-VAM-99.9-IG is a flammable liquid with flash point -8 °C and should be stored in vertical carbon steel or 316L stainless steel vessels under nitrogen at 0.2–0.5 bar gauge. Storage temperature is maintained between 15 °C and 30 °C; excursions above 35 °C for more than 72 h can initiate dimerization and consume inhibitor. The product must not contact copper, brass, or zinc because trace metal ions catalyze radical formation. Dissolved oxygen should be kept below 5 mg/kg before charging because oxygen consumes reducing agent and widens particle size distribution. At relative humidity above 60%, transfer lines should be dried with nitrogen to prevent water uptake beyond the 0.05 wt% specification. If stored beyond 6 months, inhibitor content and acidity should be re-tested by ASTM D2190 before use.
The nitroxyl inhibitor is pH-sensitive. At pH 4.0 or lower, its scavenging efficiency decreases by approximately 30%; pre-emulsions buffered with sodium bicarbonate to pH 4.5–5.5 are therefore recommended. Below pH 4.0, induction time can extend by 20–40 min and seed particle count can fall, producing larger mean particle diameter and lower shear stability. At pH above 7.0, the inhibitor may participate in nitroxide-mediated polymerization, narrowing molecular weight distribution but potentially reducing conversion at ethylene pressures below 30 bar. These thresholds are reactor-specific; published data for this exact configuration is limited.
Substitution trials on a 12,000 L 316L stainless steel reactor with a 45° pitched-blade turbine and jacket cooling capacity of 350 kW compared two campaigns: one using hydroquinone-stabilized VAM with 12 mg/kg inhibitor, and one using NP-VAM-99.9-IG with 8 mg/kg active nitroxyl inhibitor. The reactor was charged with deionized water, a sodium alkyl ether sulfate surfactant, and a nonylphenol-free nonionic surfactant; ethylene was introduced to 45 bar partial pressure. After nucleation, the monomer delay feed was maintained at 850 kg/h for both campaigns. The non-phenol campaign exhibited an average induction time of 18 min versus 24 min for the hydroquinone control, and final conversion was 99.4% versus 99.1% after 5 h. Coagulum collected on a 200-mesh screen was 0.04% of wet latex for the non-phenol run and 0.06% for the control, while final Brookfield viscosity at 20 rpm was 2,050 mPa·s compared to 2,300 mPa·s. The lower viscosity reduced circulation pump energy by an estimated 3–5% in this campaign, but this value is specific to the agitator and tank geometry.
Replacement is not universally neutral. When the same monomer was tested in high-solids formulations above 60%, the non-phenolic inhibitor reduced particle density slightly, shifting the particle size distribution from 180 nm to 210 nm and lowering gloss at 60° by 2–4 units on ASTM D523. For interior flat and matte paints this shift was acceptable; for semi-gloss interior applications, an additional 0.2% anionic surfactant was required to restore nucleation density. The product should therefore be evaluated in the specific formulation rather than assumed to be a direct substitute.
NP-VAM-99.9-IG is used in VAE emulsions for interior wall paints, ceiling paints, tile adhesives, carpet backsizing, and paper coating. In wall paints, VAE copolymers with ethylene contents of 8–15 wt% allow coalescent-free film formation at substrate temperatures down to 5 °C, a factor in meeting low-VOC requirements such as GB 18582-2020. The unpigmented emulsion itself typically contains residual vinyl acetate below 0.05 wt% after post-polymerization stripping, and residual ethylene is vented. Cost savings relative to conventional VAM arise from reduced stripping steam demand because acetaldehyde and methyl acetate are controlled at the monomer stage; no aromatic inhibitor is present to contribute to VOC or extractable fractions. In one production-scale interior flat paint trial, the VAE binder made with NP-VAM-99.9-IG provided wet scrub resistance of 1,300 cycles under ISO 11998 and a ΔE of 1.2 after 200 h xenon-arc exposure under ASTM D2565, compared with 1,100 cycles and ΔE 2.8 for an HQ-stabilized control. Published data for this specific configuration is limited, and results should be confirmed on the final formulation.
| Standard or regulation | Parameter | Applicability |
|---|---|---|
| ASTM D2190 | Vinyl acetate monomer specification | Monomer release |
| ISO 11890-2 | VOC content | Finished paint or adhesive |
| GB 18582-2020 | Interior wall coating VOC | Finished coating |
| ASTM D2244 | Color difference | Yellowing evaluation |
| ISO 11998 | Wet scrub resistance | Interior paint film |
| FDA 21 CFR 175.105 | Adhesives indirect food contact | Finished adhesive only |
For interior adhesives, VAE copolymers with ethylene contents at the higher end of the range, 15–25 wt%, deliver pressure-sensitive adhesion and flexibility; the non-phenolic inhibitor reduces the risk of aromatic migration that can affect indirect food-contact suitability. Compliance with FDA 21 CFR 175.105 is product-specific and depends on the complete additive package, residual monomer level, and polymerization aids, not solely on the VAM inhibitor chemistry. The product is not recommended for exterior VAE formulations requiring long-term UV stability without added light stabilizers; the non-phenolic inhibitor does not contribute to in-service antioxidant protection, and films must be formulated with suitable hindered amine light stabilizers. The monomer is incompatible with strong oxidizing agents, concentrated peroxides, and amine-based additives such as triethylamine or morpholine in raw monomer storage because amine bases can deprotonate the inhibitor and reduce its efficiency. It should not be blended with styrene or acrylates in raw monomer storage because mixed-monomer systems can exhibit different inhibitor partitioning and premature polymerization. Final emulsion mechanical stability should be verified by ISO 12000 or equivalent; the product should not be used as a 100% solids monomer without polymerization because it is a reactive liquid.
