| HS Code | 971403 |
| Chemical Identity | vinyl acetate-ethylene copolymer |
| Dispersion Medium | water (aqueous dispersion) |
| Appearance | white homogeneous liquid |
| Solids Content | 50 ± 1% |
| Viscosity At 23c | 3000–7000 mPa·s (Brookfield) |
| Ph | 4.5–5.5 |
| Density At 20c | 1.06 g/cm³ |
| Average Particle Size | 1.0 μm |
| Glass Transition Temperature | -8 °C |
| Minimum Film Forming Temperature | 0 °C |
| Surface Tension | 36 mN/m |
| Protective Colloid | polyvinyl alcohol |
As an accredited VINNAPAS 5025 L factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | VINNAPAS 5025 L is supplied in 1,000 kg IBC containers, 200 kg drums, or bulk tankers, depending on requirements. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): VINNAPAS 5025 L is packed into a 20-foot container using flexitanks or drums, secured properly for safe transport. |
| Shipping | VINNAPAS 5025 L is a vinyl acetate-ethylene copolymer dispersion. For shipping, it is generally classified as non-dangerous goods under transport regulations. It should be transported in sealed containers, kept between 5–30°C, and protected from freezing and direct sunlight to maintain stability and product quality. |
| Storage | Store VINNAPAS 5025 L in tightly sealed original containers in a cool, dry, frost-free location away from direct sunlight and heat sources. Recommended storage temperature is between 5°C and 35°C; do not allow to freeze. Avoid contamination and water ingress. Under these conditions, shelf life is typically six months from delivery. |
| Shelf Life | Shelf life is 6 months from delivery if stored unopened in original containers, protected from frost, at temperatures between 5–30°C. |
In high-performance tile fixing systems, cementitious tile adhesives classified C2/S1 under EN 12004:2017 are produced with VINNAPAS 5025 L at a dry-mix dosage of 2.0–3.5% by total batch mass. The powder is introduced in the dry blending stage after the coarse fillers and before the cellulose ether dispersion aids. A horizontal plowshare mixer operating at 5–10 m/s tip speed provides sufficient shear to de-agglomerate fines without raising bulk temperature above 40°C; higher tip speeds can smear the polyvinyl alcohol-protected powder onto blades and increase blocking tendency during subsequent silo storage. The hydrated VAE film coalesces with cement hydrates and bridges microcracks, which is directly relevant to the wet and heat-aged adhesion protocols of EN 1348:2007. Because the VAE copolymer has a minimum film-formation temperature near 0°C, coalescence proceeds at typical indoor application temperatures of 10°C and above; below 5°C substrate temperature, open time is shortened by hindered film coalescence. In C2-class formulations containing CEM I 42.5 R, silica sand 0.1–0.5 mm, and 10–40 µm limestone filler, a dosage of 2.5% shifts the open-time failure mode under EN 1346:2007 from interfacial detachment at the tile-adhesive plane to cohesive failure within the adhesive or the tile body. Published data for this exact premix configuration are limited; formulation-level validation is required because cement type, sand angularity, and cellulose ether viscosity all interact with the polymer film. Excess addition above 5.0% typically increases air entrainment, reduces wet density, and may compromise the compressive strength necessary for tile fixing under EN 1348:2007 after water immersion. Therefore the upper addition boundary should be verified by measuring air content using EN 1015-7:1998 and by checking that the 28-day compressive strength does not fall below 10 N/mm² for indoor wall or 15 N/mm² for floor applications. The mixed mortar is applied with a notched trowel at a coverage of 2–4 kg/m², and open time is extended by polymer film formation at the surface rather than by excessive water retention alone. For production-scale dry blend lines, silo storage should be maintained below 30°C and 60% RH; pre-drying of sand to ≤0.1% moisture by weight is recommended to avoid premature powder redispersion and lump formation in the mixer.
| Component | Mass range (kg/t dry batch) | Processing boundary |
|---|---|---|
| CEM I 42.5 R or CEM II/A-LL 42.5 R | 340–420 | Store dry; use within 4 weeks of milling in high-humidity regions |
| Silica sand 0.1–0.5 mm | 480–560 | Moisture ≤0.1% before weighing |
| Limestone filler 10–40 µm | 50–120 | Control water demand; fine filler increases polymer requirement |
| VINNAPAS 5025 L | 20–35 | Add after dry fillers; mixing time 3–5 min after final addition |
| Cellulose ether 400–800 mPa·s | 3–5 | Avoid high shear overheating above 40°C |
| Starch ether | 0.5–1.5 | Shear-thinning control; overdose reduces wet tack |
| Calcium formate | 0–8 | Only in early-strength indoor systems |
On expanded polystyrene substrates, base coats for external thermal insulation composite systems are formulated with VINNAPAS 5025 L at 2.5–4.5% on dry mix to secure adhesion to EPS while maintaining water-vapour transmission. The ready-mixed powder is combined with water to a fresh mortar consistency of 170–190 mm spread according to EN 1015-3:1999. An alkali-resistant glass fibre mesh of 145–165 g/m² is embedded in the first pass not deeper than 1 mm from the outer render surface; this placement is critical because the VAE film has a lower modulus than the cementitious matrix and allows stress dissipation around mesh filaments. Adhesion to EPS is evaluated by pull-off according to EN 1015-12:2016; EAD 040083-00-0404 requires failure within the EPS substrate rather than at the polymer-cement boundary. Formulations below 2.0% VINNAPAS 5025 L may show interfacial failure after heat ageing at 70°C because polymer chains in the interphase undergo coalescence shrinkage and can leave the EPS pores under-embedded. The mix should be retarded with a low-dosage cellulose ether to allow a wet edge time of 20–30 min. Avoid addition of strongly acidic accelerators; aluminium- or boron-based compounds can destabilize the protective colloid and reduce redispersibility. In machine-applied base coats, the dry powder is transferred by screw conveyor to a continuous mixer with water dosing at 0.19–0.23 water-to-powder ratio; trommel screen residue should be held below 0.5% on a 0.315 mm sieve to prevent mesh shadowing. The system’s freeze-thaw resistance is assessed by cycling according to EAD 040083-00-0404; modified base coats with adequate dosage typically pass the required adhesion threshold after 30 freeze-thaw cycles, but the final value depends on render thickness and mesh position. Therefore each plant batch is evaluated against the full ETICS assembly, not only on mortar test specimens, because failure location is an installation-level variable.
Because flow retention in self-leveling underlayments is governed by colloidal interactions among cement, calcium sulfate, and polymer particles, VINNAPAS 5025 L is added at 1.5–2.5% on total dry solids rather than the higher tile adhesive dose. The polymer powder is suitable in ternary binder systems containing Portland cement, calcium aluminate cement, and anhydrite, where the VAE phase moderates the rapid ettringite-setting matrix and reduces surface dusting. Flow consistency by ring spread test EN 12706:1999 should remain at 140–160 mm initial and not drop below 120 mm after 10 min. At addition levels above 3.0%, flow drops more rapidly because hydrate-forming colloidal polymer films increase plastic viscosity; the mix requires additional polycarboxylate ether superplasticizer and may exhibit delayed tack-free time. The dry mix is manufactured in a twin-shaft continuous mixer with jacketed cooling, with material temperature held below 35°C to prevent powder bridging at the filling screw. The mixed powder is then applied at 3–10 mm thickness over pre-dampened, primed concrete substrates to avoid rapid water loss at the interface. Floor covering installations require residual moisture by carbide hygrometer below 2.0% before impermeable coverings; VAE films may slow drying at higher dosage, so curing time is generally extended by 12–24 h compared with unmodified underlayments. Compressive strength class CT-C25-F6 under EN 13813:2002 is attainable at 2.0% dosage if the water-to-powder ratio is kept below 0.20; beyond 3.5% dosage, the 28-day compressive strength can fall below 25 MPa due to polymer phase volume and air entrainment. The same powder addition improves surface resistance to abrasion under ASTM D4060-19 taber abrasion by embedding surface aggregates in a flexible matrix; published data for this specific configuration are limited, but standardised abrasion tests indicate that unmodified underlayments produce more surface dust under early foot traffic.
| Standard | Property | Condition / indication |
|---|---|---|
| EN 12004:2017 | Cementitious tile adhesive classification | C2/S1 performance under deformation |
| EN 1348:2007 | Tensile adhesion strength | Water immersion, heat ageing, freeze-thaw conditioning |
| EN 1346:2007 | Open time | Adhesion after 30 min notched trowel ageing |
| EN 1347:2007 | Slip | ≤0.5 mm for heavy tiles |
| EN 12706:1999 | Flow ring | Initial and 10 min flow retention |
| EN 13813:2002 | Screed and underlayment performance | CT-C25-F6 class target |
After the gypsum binder is pre-screened to 0.2 mm maximum residue, gypsum-based joint fillers and skim coats formulated to EN 13279-1:2008 type B1/20 or ASTM C475/C475M incorporate VINNAPAS 5025 L at 1.5–3.5% to control surface absorption and improve sanding resistance. The VAE powder is dry-blended with calcium sulfate hemihydrate and ground limestone in a low-shear vertical cone blender; high-intensity plowshare mixers may generate frictional heating above 40°C when filling ratio exceeds 70%, partially softening the polyvinyl alcohol protective colloid and causing blocking. The dry mix is applied at 0.5–3 mm thickness; film formation at the surface seals pores and reduces differential suction into highly absorbent paper-faced gypsum boards, which limits edge cracking. Tensile adhesion to gypsum board is evaluated by the bond test in ASTM C474-15; polymer-modified formulations typically shift failure from the board-paper interface to the compound matrix. The lower modulus component also reduces notch sensitivity during sanding; this is reflected in lower pull-off of surface fibres after 24 h drying at 23°C/50% RH. Open time and setting behaviour are controlled by the retarder-accelerator balance and should not be adjusted by increasing polymer dosage, because film coalescence consumes water at the surface and can extend the time to fully sandable hardness. The powder addition is not a replacement for anti-sag agents in thick joint applications; additional cellulose ether or starch ether is required when the joint depth exceeds 5 mm.
Where crack bridging and carbonation resistance are specified under EN 1504-3, polymer-modified repair mortars use VINNAPAS 5025 L at 2.5–4.0% by dry mortar mass. The polymer powder lowers the modulus of elasticity and improves bond to concrete substrates; however, it does not by itself confer structural crack bridging above 0.3 mm without additional fibres. The powder is dry-blended with CEM I 42.5 R, silica sand with maximum particle size 1.0 mm, and superplasticizer; no liquid acrylic dispersion is required because VINNAPAS 5025 L supplies the polymer phase after redispersion. The fresh mortar is mixed at 0.18–0.22 water-to-binder ratio using a forced-action mixer with a high-shear paddle; mixing time of 2–3 min is required for complete wetting of the powder. Adhesion to concrete substrate is measured by pull-off per EN 1542:1999; batches with 3.0% additions often approach 1.2–2.0 MPa and show cohesive failure in the substrate or repair layer rather than at the interface. The powder also reduces chloride ion penetration in immersed repair zones; rapid chloride permeability testing under ASTM C1202-19 indicates a decrease in total charge passed when the polymer film occludes capillary pores, but the effect is non-linear and may disappear at dosage above 4.5% where compressive strength loss exceeds 15%. Formulators should avoid superplasticizer incompatibility with the polyvinyl alcohol colloid; naphthalene sulfonate-based products are generally tolerated, whereas certain melamine-sulfonates with high anionic charge can destabilize the redispersed latex. For vertical repair sections, the mortar should be applied in a single pass not exceeding 10 mm; thicker sections require stiffer consistency and may show surface cracking if the underlying concrete is saturated but not surface-dry. The cured layer is tested for carbonation protection according to EN 13295:2004 in accelerated chamber conditions; polymer modification delays the carbonation front, but the protection remains dependent on minimum layer thickness and curing time.
For mineral renders and skim coats based on cement-lime binders, VINNAPAS 5025 L is added at 1.0–2.0% to reduce surface crusting under rapid drying; the dry powder is added with the cement fraction before lime hydrate, and the mix is judged ready when a 0.5 mm bar does not show free water separation.
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VINNAPAS® 5025 L is a polyvinyl alcohol-stabilized aqueous dispersion of a vinyl acetate-ethylene copolymer supplied as a white, plasticizer-free liquid for waterborne adhesive, lamination, and binder systems. The product is characterized by a nonvolatile content of 54–56 wt% when tested according to ISO 3251. The ethylene comonomer reduces the minimum film-forming temperature internally, eliminating the need for dibutyl phthalate, triacetin, or benzoate plasticizers that are common in polyvinyl acetate homopolymer adhesives. That distinction is operationally significant where migration and extractables are controlled in food-contact paper and board lamination. The designation VINNAPAS 5025 L identifies a lower-viscosity liquid configuration within the VAE range; published data for the exact ethylene molar content is limited because the manufacturer characterizes the polymer through application performance rather than compositional disclosure. The dispersion is not a dispersible polymer powder and cannot be dry-blended into cementitious mortars without reformulating water demand and stabilization.
The following typical values are derived from technical data sheet values for VINNAPAS 5025 L. They are not lot-release specification limits unless a certificate of analysis states otherwise, and they may vary between production sites and regulatory versions. The current Wacker technical data sheet must be reviewed for the specific version supplied.
| Property | Typical value or description | Test method |
|---|---|---|
| Appearance | White, viscous dispersion | Visual inspection |
| Nonvolatile content | 54–56 wt% | ISO 3251 |
| Brookfield RV viscosity at 25 °C, spindle 3, 20 rpm | 1,500–3,500 mPa·s | ISO 2555 |
| pH at 25 °C | 4.0–5.5 | ISO 976 |
| Density at 20 °C | 1.06–1.08 g/cm³ | ISO 2811 |
| Glass transition temperature, DSC midpoint | approximately -14 °C | ISO 11357-2 |
| Minimum film-forming temperature | approximately 0 °C | ISO 2115 |
| Stabilizer system | Polyvinyl alcohol | Not applicable |
Because the Brookfield RV viscosity is a low-shear value obtained at 20 rpm, it does not describe the dispersion under application shear. Polyvinyl alcohol-stabilized VAE dispersions are pseudoplastic; at a cone-plate shear rate of 1000 s⁻¹, the apparent viscosity is typically lower than the low-shear value. Metering pumps and roll-coater settings should not be designed solely from the 1,500–3,500 mPa·s figure. On a direct gravure coating line, the dispersion transfers from engraved cells under high shear and must then level before drying. For a wet film thickness of 50 µm, a density of 1.07 g/cm³, and a solids content of 55 wt%, the wet mass is approximately 53.5 g/m² and the dry mass is approximately 29–30 g/m². If the coating specification is 35 g/m² dry, the engraving volume or wire-wound rod number must be increased or a higher-solids let-down must be used. Transfer efficiency on a roll coater is not 100%; a factor of 0.80–0.95 is typical for engraved roller systems with adequate wetting, so the actual metered volume must be divided by this factor. The recommended starting cell volume for a 35 g/m² dry coat weight at 55 wt% solids and 0.85 transfer efficiency is approximately 70 cm³/m². Pilot trials with a laser-engraved roll and a 0.2 mm doctor blade gap are recommended to establish settings, because published transfer-efficiency data for this specific grade on polyethylene terephthalate is limited.
Continuous roll coating lines with direct gravure and a smoothing roll require a balance between low-shear viscosity and high-shear rheology. If the dispersion is too high in low-shear viscosity, it may not transfer uniformly from a cell volume below 15 cm³/m². If it is too low, ribbing and back-flow from the doctor blade can occur. On absorbent board, open porosity increases effective coat weight by removing water and causing polymer penetration; the actual dry surface weight may be lower than the metered value. A laser-engraved roll with cell geometry 60° angle and 120 lines/cm is a common starting point for waterborne adhesives; however, published roll parameters for this specific dispersion on coated board are limited.
Drying capacity for waterborne VAE is a process bottleneck. For a 50 µm wet film at 1.07 g/cm³ and 55 wt% solids, the water load is approximately 24 g/m². At a line speed of 50 m/min, the required evaporation rate is 1.2 kg/min per metre of web width. Infrared or hot-air dryers must provide sufficient energy without causing surface skinning, which traps water and reduces film coalescence. The calculated dew point of the exhaust air should be monitored; published drying-rate data for VINNAPAS 5025 L is limited, so drying trials with an air velocity of 10–20 m/s and a web surface temperature below 60 °C are recommended. Higher surface temperatures can cause rapid skinning due to the polyvinyl alcohol stabilizer and should be avoided until the material is validated.
Storage and handling boundaries are critical for lot-to-lot uniformity. Protect from frost because freeze-thaw cycles can coagulate the dispersion irreversibly. Do not store below 5 °C or above 30 °C. The manufacturer’s shelf-life statement is generally 6 months in unopened containers; tanks should be closed to prevent skin formation and bacterial growth after dilution. Homogenize with a low-speed propeller stirrer below 250 rpm before use. Avoid addition of borax, aluminium sulfate, or concentrated polyvalent cations because these can thicken or coagulate a polyvinyl alcohol-stabilized VAE dispersion. pH adjustment with dilute ammonia or sodium hydroxide should be incremental; pH above 8.5 can swell the stabilizer and increase viscosity, while pH below 3.5 can protonate the stabilizer and reduce colloidal stability. If acidifying components are required, use buffer systems and monitor Brookfield viscosity after each addition.
Polyvinyl alcohol stabilization influences wet tack, surface tension, and compatibility with additives. Polyvinyl alcohol-stabilized VAE dispersions classically exhibit surface tensions in the 40–50 mN/m range, which is higher than many surfactant-stabilized acrylic or styrene-butadiene latexes. Wetting on low-surface-energy films such as biaxially oriented polypropylene, polyethylene terephthalate, or coated board often requires nonionic wetting agents. Published surface-tension data for this exact grade is limited, so a Wilhelmy plate or pendant-drop measurement according to ASTM D1331 or ISO 304 should be completed before coating trials. Defoamers based on mineral oil or silicone are used at 0.05–0.20 wt% of total formulation; excess defoamer can produce craters or fisheyes on coated board. The polyvinyl alcohol stabilizer contributes high wet tack to absorbent paper and wood but increases sensitivity to borate ions and polyvalent salts. In a production-scale adhesive blender, borax addition beyond trace levels can cause irreversible gelation; compatibility testing in a 1 L glass reactor with a paddle stirrer at 250 rpm is recommended before line trials.
Compounding order of addition affects shear stability. A typical sequence is water, defoamer, thickener, then VINNAPAS 5025 L under low-speed agitation. Plasticizer-free tackifiers should be predispersed before addition; high-acid-value rosins can interact with the polyvinyl alcohol stabilizer and should be neutralized or tested. Biocides should be added after pH adjustment to avoid hydrolysis. In a 500 L production vessel with a sweep-agitated anchor stirrer, the dispersion can be circulated through a diaphragm pump at 20–40 L/min; prolonged circulation through high-speed centrifugal pumps is not recommended because foaming and coarse agglomerates may form. Lot-to-lot variation in Brookfield viscosity within the stated range is normal; let-down solids should be checked by ISO 3251 after water addition and after 24 h equilibration.
In paper and paperboard lamination, VINNAPAS 5025 L is used as a sole binder or blended with plasticizer-free tackifiers, thickeners, and biocides. Wet film weights of 50–100 µm applied by engraved roller or wire-wound rod are common for corrugated and folding carton bonds; fibre-tearing bonds to linerboard are achieved after compression at 60–90 °C. The sealing window depends on line speed, board moisture, and heat transfer through the nip; published data for the specific heat-seal window on clay-coated board is limited. For textile and nonwoven binder applications, the dispersion can be applied by padded nip or spray; the cured film resists yellowing in indoor exposure but is not equivalent to acrylic binders in exterior durability or water immersion. Thickeners should be selected for anionic or nonionic formulation pH between 4.0 and 7.0; alkali-swellable associative thickeners require neutralization and may shift the pH outside the stable region if added aggressively. Dilution with water is possible but reduces wet tack and increases drying demand; additions above 10 wt% water should be validated for stability and viscosity.
Replacement of a plasticized polyvinyl acetate homopolymer with VINNAPAS 5025 L changes cohesive strength, heat resistance, and migration. The homopolymer requires 5–15 phr plasticizer to depress minimum film-forming temperature below 5 °C; plasticizer can migrate into absorbent substrates and reduce bond strength after storage. The VAE dispersion achieves a minimum film-forming temperature close to 0 °C through internal ethylene modification, eliminating this migration mechanism. The trade-off is reduced heat resistance: with a DSC midpoint glass transition temperature of approximately -14 °C, the film softens earlier under load than a higher-Tg homopolymer. Published data for hot-creep performance of this exact grade under constant load is limited, but the lower Tg predicts lower cohesive strength at 60 °C. Formulators should verify heat resistance with constant-load shear testing in a forced-air oven; a 1 kg weight on a 25 mm × 25 mm bonded area can be used as a comparative screening method, provided the shear distance is recorded after 1 h at temperature.
| Property | VINNAPAS 5025 L | VINNAPAS 5010 N | Basis or method |
|---|---|---|---|
| Nonvolatile content | 54–56 wt% | 54–56 wt% | ISO 3251 |
| Glass transition temperature, DSC midpoint | approximately -14 °C | approximately +16 °C | ISO 11357-2 |
| Minimum film-forming temperature | approximately 0 °C | approximately +16 °C | ISO 2115 |
| Film flexibility | High, plasticizer-free | Moderate, plasticizer-free | Derived from glass transition temperature |
| Typical application | Flexible lamination, nonwoven binders, low-temperature adhesion | Wood and paper assembly, higher heat resistance | Application data |
Because both products are plasticizer-free VAE dispersions, a grade substitution should not be treated as a simple viscosity adjustment. The lower glass transition temperature of VINNAPAS 5025 L reduces heat-fail temperature and can increase blocking in coated stacks above 40 °C. Conversely, a higher-Tg grade does not form films below its minimum film-forming temperature without coalescing solvents or heat. In packaging adhesives, VINNAPAS 5025 L is therefore selected where cold-set flexibility and substrate adhesion dominate; a higher-Tg grade is selected where block resistance and heat-creep resistance dominate. Published comparative data across all substrates is limited; a designed experiment should include DIN EN ISO 527-3 film tensile testing and ISO 11339 T-peel adhesion testing after 24 h at 23 °C and 50% RH.
Ethylene modification reduces the proportion of hydrolyzable acetate groups compared with polyvinyl acetate homopolymer, but the VAE backbone is not alkali-resistant under all conditions. Exposure of dried films to pH above 10 at elevated temperature accelerates hydrolysis and loss of tensile strength. The dispersion itself has a pH of 4.0–5.5; direct addition of cement, calcium hydroxide, or sodium silicate raises pH and can destabilize the colloid. It is not to be used as a direct cement additive without a protective colloid or separate polymer system. In waterborne adhesive formulations, avoid strong anionic surfactants that can displace the polyvinyl alcohol stabilizer; if surfactant wetting is required, add under mild agitation and monitor Brookfield viscosity to detect destabilization. The film is water-sensitive in prolonged immersion. It should not be specified for exterior marine or continuously wet service unless crosslinking agents or external curing strategies are proven to improve water resistance; published data for this exact product in crosslinked systems is limited.
Regulatory compliance is formulation-dependent. For indirect food contact in paper and paperboard, the finished article must be evaluated under FDA 21 CFR 176.170 and FDA 21 CFR 176.180. The dispersion as supplied is subject to occupational exposure limits for residual vinyl acetate monomer and acetic acid. Under the ACGIH threshold limit value system, vinyl acetate has an 8-hour time-weighted average guideline of 10 ppm and a short-term exposure limit of 15 ppm. EU users must review the extended safety data sheet under REACH; the product is subject to the standard industrial hygiene controls for aqueous polymer dispersions. Use local exhaust ventilation when drying large open surfaces or when heating the dispersion in enclosed ovens to avoid exposure to acetic acid vapours. The technical data sheet and the Wacker specification bulletin for VINNAPAS 5025 L remain the governing documents for lot acceptance; the values in this document are advisory and not a legal specification.
