| HS Code | 622984 |
| Product Name | VINNAPAS 4018 N |
| Product Type | Aqueous vinyl acetate-ethylene (VAE) copolymer dispersion |
| Chemical Family | Vinyl acetate-ethylene copolymer |
| Appearance | White to off-white milky liquid |
| Solids Content | Approx. 55% |
| Viscosity | Approx. 5000 mPa·s at 23°C |
| Ph | Approx. 5.0 |
| Density | Approx. 1.06 g/cm³ at 20°C |
| Average Particle Size | Approx. 1 µm |
| Glass Transition Temperature Tg | Approx. -7°C |
| Minimum Film Forming Temperature Mfft | Approx. 0°C |
| Film Appearance | Clear, flexible film |
| Film Flexibility | Flexible at low temperature |
| Stabilizer | Polyvinyl alcohol-stabilized |
| Primary Use | Adhesives and bonding applications |
As an accredited VINNAPAS 4018 N factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | VINNAPAS 4018 N is a redispersible polymer powder supplied in 25 kg multi-layer paper bags with an inner polyethylene liner. |
| Container Loading (20′ FCL) | Container loading of VINNAPAS 4018 N: 20′ FCL with palletized drums, secured properly, ensuring safe transport and handling. |
| Shipping | VINNAPAS 4018 N is an aqueous vinyl acetate-ethylene copolymer dispersion. It is typically classified as non-hazardous, non-DG material for road, rail, sea, or container transport. Protect from freezing and excessive heat; maintain temperatures between 5°C and 35°C during shipment to preserve stability and performance. |
| Storage | Store VINNAPAS 4018 N in its original, tightly sealed containers in a cool, dry, well-ventilated area. Protect from frost, extreme heat, and direct sunlight; recommended storage temperature is 5–35°C. Avoid contamination and evaporation. Stir gently before use. Under proper conditions, shelf life is typically up to 12 months from delivery. |
| Shelf Life | Shelf life for VINNAPAS 4018 N is typically 12 months from production when stored properly in sealed containers, protected from frost and heat. |
VINNAPAS 4018 N functions as the sole polymer dispersion in woodworking adhesives where DIN EN 204/205 D2 or D3 resistance is required without plasticizer solids. The raw dispersion is supplied at 53–55% solids, with a Brookfield RVT viscosity at 20°C in the range 4,000–6,000 mPa·s and a pH of 4.0–5.0. For a D3-grade adhesive, the primary formulation is 100 pph of VINNAPAS 4018 N, 3–5 pph of an aliphatic polyisocyanate crosslinker with an NCO content of 11–13%, 0.2–0.5 pph of a polyether siloxane defoamer, and 0.1–0.3 pph of aqueous ammonia to maintain pH above 5.5 after isocyanate addition. The mixture is homogenized in a dissolver with a toothed disc at 15–20 m/s tip speed. The pot life at 23°C is 2–4 h; an increase to 30°C shortens the processing window to approximately 1.5 h. Beech lap-shear specimens are laminated at 120–180 g/m² wet adhesive, with open assembly time of 5–10 min, closed assembly time of 5 min, and pressing at 0.8–1.2 N/mm² for 90–180 min in a hydraulic press with platen dimensions of 400 mm × 800 mm. The DIN EN 204 D3 classification requires the bond to withstand a defined cold-water immersion sequence: 4 days immersion in water at 20°C, followed by immediate tensile shear testing according to DIN EN 205 at a test speed of 10 mm/min. The minimum shear strength is defined by the classification table of DIN EN 204 and must be verified on the converter’s beech substrate. Production-scale experience shows that wood moisture above 12 wt% leads to foaming at the joint edge during pressing and reduces D3 pass reliability because surplus water interrupts the isocyanate crosslinking reaction. Pre-drying the wood to 8–10 wt% moisture and maintaining adhesive film weight below 180 g/m² are the two control measures most often used on continuous edge-gluing lines.
Folding carton and graphic board laminating lines meter VINNAPAS 4018 N through closed-chamber doctor systems because the dispersion’s pseudoplastic viscosity profile allows transfer at high line speeds without excessive misting. A commercial wet-laminating formulation consists of 100 pph VINNAPAS 4018 N, 0.3–0.8 pph of a silicone-free mineral-oil defoamer, 0.5–1.0 pph of ammonia for pH adjustment to 5.0–5.5, and 0.0–2.0 pph of propylene carbonate as a coalescent when the line operates below 15°C. The adhesive is applied to one web by a chrome-plated engraved roller with 70–90 lines/cm and a ceramic doctor blade; wet coat weight is maintained between 18 g/m² and 30 g/m². Compression is delivered by a roller nip with a 50–80 N/cm linear load and a dwell time of 0.3–0.8 s. The finished laminate is slit into folding cartons. FDA 21 CFR 175.105 covers the adhesive component in food-contact packaging when applied in accordance with good manufacturing practices, but the converter must still verify migration limits for the finished laminated stock under the applicable food simulant and condition of use. On recycled brown board with high short-fiber content, a wet film above 25 g/m² is required to prevent dry-edge lift, while coated white-lined board accepts 18 g/m² without delamination. Long-run experience on corrugated laminating lines indicates that foam control and pH stability are the principal processing variables when the dispersion is recirculated for more than 4 h; unattended pH drift below 4.0 increases viscosity and reduces transfer uniformity across the web width.
| Regulatory reference or standard | Bonding sector | Verification point |
|---|---|---|
| FDA 21 CFR 175.105 | Paper and board food-contact folding cartons | Adhesive component clearance under GMP; finished-article migration assessed separately for the laminate |
| EU Regulation (EC) No 1935/2004 | Paper cup side seams and carton seams | Overall and specific migration limits according to food type and simulant |
| DIN EN 204/205 | Woodworking adhesives | D2 or D3 classification on beech lap-shear specimens after defined immersion and conditioning |
| REACH Regulation (EC) No 1907/2006 | All downstream adhesive formulations | SVHC notification threshold 0.1% w/w in article; current SDS exposure scenarios |
In high-speed paper cup and carton seam bonding, VINNAPAS 4018 N is selected because the median Brookfield viscosity at 20 rpm is 4,500–5,500 mPa·s. The adhesive is applied by lance nozzle at 0.05–0.15 g per side seam, then compressed for 0.4–1.0 s before cup forming. Published standardized wet-tack methods for this specific configuration are limited; production equipment therefore typically uses percentage fiber tear immediately after seam compression as the acceptance parameter. The limiting process variable is open time on the transfer drum: above 60 s at 23°C and 50% relative humidity, paper fiber tear drops below 80% on clay-coated carton stock because the film skins over. Adding 0.5–1.0% propylene carbonate prolongs open time but reduces wet tack after compression. Formulations for cup-side seams therefore often omit coalescent and adjust pH to 5.0. The dispersion is also used in bag-bottom and carton-seam applications where the glued area is subjected to indirect food contact. EU compliance is controlled under Regulation (EC) No 1935/2004 and any applicable national measures for paper and board; the finished article, not the polymer alone, is the compliance unit. On cup machines running above 150 m/min, air entrainment from the recirculation loop must be controlled with a 0.3% addition of a non-silicone defoamer, otherwise intermittent skip seams appear under the compression belt.
Resilient flooring adhesives formulated with VINNAPAS 4018 N are produced as low-VOC waterborne pressure-sensitive or wet-set systems for luxury vinyl tile and needle-felt carpet tile installation. The typical tackifier addition is 5–15 pph of a stabilized hydrocarbon resin ester dispersion; additions above 20 pph increase peel adhesion to low-energy vinyl backing but reduce shear resistance on subfloor heated to 35°C. The mixed adhesive is applied with a 1.5 mm × 1.0 mm square-notched trowel to give 250–300 g/m² wet film. Open time at 23°C and 50% relative humidity is 15–25 min; tile is placed only after the film has transferred to a slight haze and no longer marks white paper. Early shear is checked on conditioned concrete with a 50 kg rolling load at 0.8 m/s, and peel resistance after 7 days is evaluated according to the flooring adhesive methods in EN 1903. The plasticizer-free nature of the dispersion prevents staining of plasticizer-sensitive vinyl tile; this is verified by a 30-day direct-contact test at 40°C under a 1 kg static load. Do not combine the formulation with amine-based pH buffers during tackifier blending, because residual amine accelerates pH drift and can destabilize the dispersion at storage temperatures above 30°C.
Roller application in sheet-to-sheet lamination uses a two-roll coater with a steel backing roll and an EPDM rubber applicator roll. The gap is adjusted to 0.08–0.15 mm because the dispersion viscosity at 20°C is 4,000–6,000 mPa·s. Coating weight is linearly dependent on roll gap up to 0.12 mm; transfer at 0.15 mm yields 22–28 g/m² wet on PE-coated board. Above 0.18 mm, surface ribbing occurs due to elongational flow instability. Line speed is maintained at 30–60 m/min; above 80 m/min, misting requires a high-molecular-weight associative thickener at 0.05–0.2 pph. The bonded stack is trimmed into book covers, display board, and folding carton blanks. When laminating printed paper to rigid board, the wet expanding tendency of paper must be offset by a short open time of 20–40 s before nipping; this prevents curl in the finished sheet. The adhesive bond is inspected for fiber tear after 24 h conditioning at 23°C and 50% relative humidity, with a minimum 90% fiber tear on uncoated board as the typical production acceptance criterion.
Membrane-press laminating of semi-rigid PVC foil to medium-density fibreboard uses a spray-grade formulation. The ratio is 100 pph VINNAPAS 4018 N, 4–6 pph aliphatic polyisocyanate, 0.2–0.5 pph silicone-free defoamer, and 0.3–0.8 pph wetting agent. The adhesive is sprayed at 60–90 g/m² wet onto MDF sanded to 180–240 grit; flash-off is 5–10 min at 20–25°C. Bonding takes place in a membrane press with a silicone membrane at 0.6–1.2 bar, platen temperature 70–85°C, and dwell 60–120 s. The processing window at the upper platen temperature is narrow: residence above 85°C for longer than 120 s produces edge shrinkage in 0.2 mm semi-rigid PVC foil. Increased creep resistance is evaluated by a static load test at 60°C for 24 h with a 500 g mass attached perpendicular to the bonded surface; displacement below 2 mm after 24 h is generally required for furniture components. The finished doors and drawer fronts are validated for domestic furniture use according to the customer’s internal procedure derived from DIN 68861-1. MDF conditioned to 8–10 wt% moisture gives the most stable bond formation; moisture above 12 wt% delays isocyanate curing and increases the appearance of pinholes under the PVC film.
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VINNAPAS 4018 N is an aqueous polymer dispersion based on vinyl acetate–ethylene copolymer. The product is supplied as a white, plasticizer-free dispersion in which ethylene acts as an internal flexibilizing comonomer, removing the need for migratory plasticizers in many formulation routes. The grade is manufactured without alkylphenol ethoxylates and is typically stabilized by an anionic/nonionic surfactant system. This stabilizer selection supports formulation work with wetting agents, defoamers, and rheology modifiers, provided that the final pH is kept within the stability window. The VINNAPAS 4018 N designation belongs to the Wacker Chemie AG product family and is differentiated from basic poly(vinyl acetate) homopolymers by its ethylene content. The product is not a redispersible powder; it is a ready-to-use aqueous dispersion that must be pumped, metered, and stored according to latex handling practices.
Minimum film-forming temperature is approximately 0 °C when tested by ISO 2115. Differential scanning calorimetry according to ISO 11357-2 gives a glass transition temperature of approximately -15 °C. The gap between MFFT and Tg is characteristic of vinyl acetate–ethylene copolymers in aqueous dispersion: water temporarily plasticizes the particle boundary during coalescence. Once the film is dry, the copolymer reverts to a flexible state at ambient temperature. Average particle size is normally 0.5–1.0 µm by laser diffraction, and the dispersion has a density of approximately 1.06 g/cm³ by ISO 2811-1. These properties are typical and not batch-release specifications. The anionic/nonionic stabilizer package provides colloidal stability in the approximate pH range 4.0–5.5; it is not a poly(vinyl alcohol)-colloid-protected PVAc, which has consequences for shear stability and electrolyte compatibility.
The table lists typical values from the manufacturer’s technical data sheet. The certificate of analysis governs each production batch; typical values should not be treated as release limits. Viscosity is measured by a Brookfield rotational viscometer at 20 rpm and 25 °C, a low-shear condition that does not predict performance under slot-die or spray equipment.
| Property | Test method | Typical value |
|---|---|---|
| Solids content | ISO 3251 | 54–56 % |
| pH | ISO 976 | 4.0–5.5 |
| Brookfield viscosity | ISO 2555, RVT, spindle 4, 20 rpm, 25 °C | 1500–3000 mPa·s |
| Minimum film-forming temperature | ISO 2115 | approximately 0 °C |
| Glass transition temperature | ISO 11357-2 | approximately -15 °C |
| Particle size | laser diffraction, ISO 13320-1 | 0.5–1.0 µm |
| Density | ISO 2811-1 | approximately 1.06 g/cm³ |
Because the dispersion is shear-thinning, a Brookfield reading at 20 rpm is not suitable for calculating pipe pressure drop or for setting doctor blade gaps in high-speed coating. Rheological characterization with a cone-and-plate or capillary viscometer is required in the shear range 10 s⁻¹ to 1000 s⁻¹. These measurements, combined with the low MFFT, permit plasticizer-free formulation at application temperatures of 10–40 °C. In bulk handling, low-shear progressive-cavity or diaphragm pumps are preferred over centrifugal pumps because localized high shear can increase coagulum generation and reduce filter service life. Bulk storage tanks should be equipped with slow-sweep agitation rather than high-speed propellers.
In paper-to-board lamination, the wet film weight is frequently set between 50 g/m² and 150 g/m² depending on substrate roughness and porosity. Roller, gravure, and slot-die coaters are all applicable; slot-die heads require filtration to 100–250 µm to prevent aggregate build-up behind the die lip. The dispersion is water-dilutable to reduce viscosity, but dilution with more than 5–10 % demineralized water can reduce wet tack and increase strike-in on absorbent board. Drying is normally carried out with forced-air ovens at web temperatures of 80–120 °C. Drying below 80 °C or insufficient air extraction can produce moisture blushing and a measurable loss in peel force under ISO 11339 or ASTM D1876. On polymer-coated boards, ink and extrusion coatings may reduce surface energy below 32 mN/m; corona or plasma pretreatment to at least 38 mN/m is often required before adhesive application. Wet tack on porous substrates is not controlled by a single ISO method; it is generally qualified in production by a roll-on-roll peel or by a rotational tack probe. Published data for this specific configuration is limited, so the processing window must be verified on the actual board and line speed.
Open time in board lamination is typically 10–60 s for this product class depending on ambient humidity; values below 10 s may lead to dry-bond failures, while values above 60 s may permit excessive strike-in. Variation in wet film weight of ±10 % across the web can be caused by roller deflection or viscosity drift; the resulting poundage variation is measurable as tensile shear strength variation under ISO 6237 for adhesive bonds. Where continuous web coating is performed, air velocity and exhaust rate should be adjusted to maintain dew point below the dry-bulb web temperature; otherwise water vapor recondenses at the web exit and increases residual moisture.
Cellulosic and carded nonwoven binder applications differ from laminating adhesives in that the dispersion is applied by spray, foam, or saturation. Spray systems operate at air pressures of 0.2–0.6 MPa and nozzle orifices of 0.5–1.5 mm; the dispersion is diluted to 10–20 % solids to prevent nozzle clogging. Saturation processes require a pad bath with pH controlled between 4.0 and 5.5; alkaline buffers or cationic fixing agents can precipitate anionic surfactant if added as concentrates. The binder level in the finished nonwoven is commonly 5–20 % dry binder on fiber weight; tensile strength and tear resistance are tested by ISO 9073-2 and ISO 9073-4. Coagulation in the pad bath occurs if multivalent salts are dosed too rapidly; aluminum sulfate and calcium chloride additions should be prediluted and metered under continuous agitation. Published product-specific values for VINNAPAS 4018 N in specific nonwoven constructions are limited and should be generated on the target fiber blend.
The principal structural difference is the incorporation of ethylene units along the vinyl acetate chain. An unplasticized PVAc homopolymer exhibits a glass transition temperature near 30–33 °C, whereas VINNAPAS 4018 N is approximately -15 °C. This difference permits coalescence at room temperature without dibutyl phthalate, triacetin, or other external plasticizers, thereby avoiding migration, plasticizer fogging, and embrittlement in service. A higher-Tg VAE or a PVAc homopolymer carries higher storage modulus and better heat resistance in shear-loaded bonds, but it requires either plasticizer or heated application. The trade-off with VINNAPAS 4018 N is lower cohesive strength and lower temperature resistance; mechanical properties should be measured on free films by ISO 527-1 and ISO 527-2, and on bonded assemblies by the relevant peel or shear method. Published comparative data for VINNAPAS 4018 N against adjacent Wacker grades is limited, so direct testing against the incumbent grade is required before substitution. Compared with older VAE dispersions that use nonylphenol ethoxylate emulsification, the N grade eliminates APEO reporting obligations and supports compliance with European Union Regulation 1907/2006 restrictions on nonylphenol ethoxylates.
| Regulatory area | Standard or obligation | Relevance to VINNAPAS 4018 N |
|---|---|---|
| REACH registration | Regulation (EC) No 1907/2006 | Polymer ingredient; monomers are registered. Downstream use information appears in safety data sheet section 1.1. |
| APEO content | Supplier declaration | Manufactured without alkylphenol ethoxylates. |
| Food-contact adhesives | FDA 21 CFR 175.105 | Base polymer may be considered for formulations subject to final adhesive extraction compliance. |
| RoHS hazardous substances | Directive 2011/65/EU, Annex II | No intentionally added lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. |
| VOC determination | ISO 11890-2 | Low-VOC aqueous dispersion; VOC content depends on final formulation and should be measured on the compounded adhesive. |
| Storage stability | Manufacturer recommendation | Store at 5–30 °C; shelf life typically 6 months in sealed original containers. |
Storage stability is maximized at 5–30 °C in sealed containers. Freezing below 0 °C causes irreversible coagulation. Once containers are opened, pH should be checked because vinyl acetate ester hydrolysis can release acetic acid; if pH falls below 4.0, adjustments with dilute ammonia under agitation may be necessary but should not exceed pH 5.5. Container headspace should be minimized because partially filled IBCs and totes are more susceptible to surface skinning and contamination. The dispersion is preserved with an antimicrobial system; at pH above 5.5, preservative efficiency may decrease. If bulk storage exceeds 30 days, recirculation with low-shear pumps and monthly microbiological checks are recommended. Freeze-thaw stability is not a product property; if a frozen container is received, the material should be rejected or tested for coagulation by filtering through a 180 µm screen. Direct contact with zinc, copper, or brass fittings should be avoided because dissolved metal ions can destabilize the dispersion. The dispersion should not be blended with amine-based coalescents or alkaline thickeners without a pre-test because rapid pH shift can generate viscosity build-up. Multivalent metal salts should be added only as dilute solutions under continuous agitation.
