| HS Code | 405403 |
| Product Name | Vinavil 2445 |
| Product Type | Vinyl acetate-ethylene (VAE) copolymer aqueous dispersion |
| Appearance | Milky white liquid |
| Solids Content | 55% by weight |
| Viscosity | 3000-6000 mPa·s at 23°C |
| Ph | 4.5-5.5 |
| Density | 1.06 g/cm³ at 20°C |
| Particle Size | 0.5-2.0 μm |
| Minimum Film Forming Temperature | 0°C |
| Glass Transition Temperature | 0°C |
| Film Characteristics | Clear, flexible, water-resistant |
| Residual Monomer Content | Less than 0.1% |
| Stabilizer System | Polyvinyl alcohol |
| Freeze Thaw Stability | Stable up to 5 cycles |
| Typical Applications | Adhesives for wood, paper, packaging, and lamination |
As an accredited Vinavil 2445 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Vinavil 2445 is supplied in 1,000 kg IBC totes or 200 kg drums, with sealed inner liners for safe handling. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Vinavil 2445: chemical product packed securely, palletized, weight-balanced, and sealed for safe transport. |
| Shipping | Vinavil 2445 is a vinyl acetate-ethylene copolymer emulsion supplied in drums, IBCs, or bulk tankers. Ship as non-hazardous aqueous dispersion. Protect from freezing and excessive heat; keep containers sealed and upright. Avoid prolonged storage above 40°C. Handle with standard PPE and prevent spills. |
| Storage | Store Vinavil 2445 in its original, tightly sealed containers in a cool, dry area away from direct sunlight and heat sources. Protect from freezing; ideal storage temperatures are between 5°C and 35°C. Under these conditions, the product remains usable for its stated shelf life. Avoid contamination. Before use, stir gently if necessary. |
| Shelf Life | Store in original sealed container at 5–35°C, protected from frost. Shelf life: 12 months from production date. |
When a 450 m/min side-seam folder-gluer converts clay-coated SBS board, the adhesive wet film is metered through a slot nozzle at 90–110 µm and consolidated under compression belts at 0.4–0.6 MPa for 2–4 s. Vinavil 2445 is incorporated at 70.0–80.0 wt% of the total wet adhesive compound, extended with 2.0–5.0 wt% of a 15% PVOH solution for wet tack and 0.1–0.3 wt% defoamer; water is added only when Brookfield viscosity exceeds 3,500 mPa·s. Incoming solids content is confirmed by ISO 3251:2019 and viscosity by ISO 2555:2018, because a ±0.5 wt% solids drift alters nip compression and open time enough to change seam geometry. Terminal products include beverage multipacks, frozen-food sleeves, and dry-goods cartons. The adhesive is positioned as an indirect food-contact material under FDA 21 CFR 175.105, with EU compliance verified by migration testing under Regulation (EU) No 10/2011 when the finished carton is exposed to food simulants. Destructive quality testing follows ASTM D1876-08(2023) T-peel after 24 h conditioning at 23 °C and 50% RH; a result below 1.8 N/mm on 400 g/m² board typically indicates insufficient compression time or substrate moisture below 5%. The principal process conflict arises when recycled fiber content exceeds 20%, because sulfate ash accelerates water loss and shifts dry adhesive deposition by 1.5–2.0 g/m² unless line speed is reduced by 7–10%.
For rotary bottle-labelling machines operating at 30,000–60,000 bottles/h, Vinavil 2445 is compounded at 60.0–75.0 wt% wet with 5.0–10.0 wt% dextrin or thin-boiling starch to adjust open time and 0.1–0.2 wt% preservative. The adhesive is transferred from a film roller at 80–120 µm wet film to pre-cut paper labels, then compressed by pincer pallets for 0.5–1.0 s onto returnable glass bottles. Terminal products are returnable beer and carbonated soft drink bottles where the label must detach completely in a 2.0–4.0 wt% NaOH bottle-washer at 80 °C within 10 min. The compatibility requirement is indirect food-contact compliance under FDA 21 CFR 175.105 together with the filling plant's bottle-washer residue specification. The limiting parameter is not initial tack but aged re-dispersibility; if the washer temperature falls below 75 °C or caustic concentration drops below 1.2 wt%, the detachment window is exceeded and residual adhesive remains on the glass. Published data for Vinavil 2445 under returnable line conditions should be confirmed by a line trial, because label stock porosity, ink varnish, and glass surface treatment shift the contact angle and modify the wash-off mechanism.
Airlaid web formation on a Dan-Web or M&J line requires the binder to be sprayed both inside the forming head and after pre-compression at 15–25 wt% diluted solids to avoid nozzle blocking. Vinavil 2445 is applied at 8.0–16.0 wt% dry binder on dry fiber mass; the wet web is then through-air dried at 130–150 °C for 20–40 s. Drying above 160 °C should be avoided because film discoloration and residual acidity become measurable. Terminal products are thin absorbent cores, industrial wipes, tabletop napkins, and medical tray liners. Tensile strength of the finished nonwoven is measured under ISO 9073-2:1995, and the binder system is assessed for formaldehyde according to EDANA/NWSP 070.1.R0 where hygiene disposables are involved. The main process failure mode is dusting at the embossing station caused by binder migration when incoming minimum film formation temperature varies more than ±2 °C; incoming MFFT is checked by ISO 2115:2000, because a shift in film formation changes binder distribution at the web center and reduces surface abrasion resistance.
The replacement of casein in interior wood assembly is driven by dark staining on oak and by alkalinity-induced fiber damage. A filled D3 adhesive based on Vinavil 2445 is compounded with 65.0–80.0 wt% wet dispersion, 15.0–25.0 wt% ground calcium carbonate with a median particle size of 3–6 µm, and 0.2–0.5 wt% associative polyurethane thickener to prevent sedimentation. The adhesive is applied by a 2-roll spreader at 110–140 g/m² single-side, assembled, and cold pressed at 0.7–1.0 N/mm² for 20–40 min. During shifts exceeding 8 h, viscosity drift is controlled by adding 0.1–0.3 wt% sodium bicarbonate to maintain pH above 4.2, because acidic hydrolysis accelerates viscosity rise. After 7 days at 23 °C and 50% RH, specimens are tested under EN 204:2016 and EN 205:2016; the D3 requirement includes a cold-water immersion sequence specified by the standard, and on beech substrates production batches should remain above the minimum tensile shear value, typically in the range of 2.0–4.0 N/mm² after the prescribed conditioning cycle. Terminal products include kitchen cabinet frames, interior door stiles, and prefabricated stair treads. The operational boundary is that Vinavil 2445 without a crosslinking hardener is not suitable for D4 exterior service, and wet service temperatures above 40 °C should be excluded from the specification.
On a carpet tile precoat line running at 12–18 m/min with a blade-over-roll coater, the dispersion is applied at 100–140 g/m² wet onto greige tufted polyamide carpet to lock the tufts before secondary backing. Vinavil 2445 is used at 45.0–65.0 wt% of the precoat compound, combined with 30.0–45.0 wt% calcium carbonate, 0.2–0.4 wt% defoamer, and 0.1–0.3 wt% ammonia to keep the compound alkaline. Dry add-on is 80–120 g/m². The web passes through an IR pre-dry zone at 90–110 °C and a drum dryer at 120–140 °C before bitumen or polyolefin secondary backing lamination at 0.3–0.6 MPa nip pressure. Tuft bind strength is measured under ASTM D1335-21; a value below 18 N for loop-pile nylon or 25 N for cut-pile indicates insufficient precoat penetration or fiber finish contamination. Terminal products are contract carpet tiles, entrance carpets, and exhibition matting. The final floor covering must meet CE marking requirements under EN 14041:2004/AC:2006, including VOC emission testing according to ISO 16000-6 where the carpet tile is placed on the EU market. Process limit: if fiber lubricant residue exceeds 0.4 wt% on the greige web, wetting failure appears as streak marks and the line must either add a pre-wash or increase binder add-on, which raises dryer energy demand.
Contract flooring adhesives formulated with plasticizer-free VAE dispersions for LVT and vinyl sheet installation use Vinavil 2445 at 25.0–40.0 wt% wet, with 30.0–45.0 wt% chalk, 0.1–0.3 wt% cellulose ether for viscosity, and 0.1–0.2 wt% biocide. The mixed compound is applied with a TKB A2 or TKB A3 notched trowel to a prepared subfloor; open time is 15–30 min at 23 °C and 50% RH, after which the flooring sheet is laid and rolled with a 50–70 kg floor roller. Indoor air emission performance is verified by GEV EMICODE EC1 Plus testing with chamber measurement under ISO 16000-6 and ISO 16000-9 after 3 days and 28 days. Terminal products are commercial luxury vinyl tile, heterogeneous vinyl sheet, and rubber floorcoverings in hospitals, schools, and retail spaces. The adhesive also supports LEED v4.1 low-emitting materials documentation when the manufacturer supplies a compliant emissions certificate. Substrate moisture above 75% RH or residual surface alkalinity above pH 9.0 can destabilize the wet dispersion and reduce wet-bed adhesion; a moisture-tolerant primer must be used before adhesive application under such conditions.
Competitive Vinavil 2445 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!
Vinavil 2445 is a waterborne adhesive raw material based on a vinyl acetate-ethylene copolymer. The grade carries the model designation 2445 and is supplied as a white, low-odour aqueous dispersion with a non-volatile matter content of 54–56% by mass determined according to ISO 3251. pH measured by ISO 976 on the undiluted product at 25°C lies between 4.0 and 5.5. Brookfield RVT viscosity at 20 rpm and 25°C is typically 4,000–8,000 mPa·s using spindle 4 after 60 s rotation. The dried polymer film exhibits a minimum film-forming temperature ≤5°C by ISO 2115 and a glass transition temperature between -2°C and +6°C by ISO 11357-2. Density at 25°C is 1.06–1.09 g/cm³ by ISO 2811. Residual vinyl acetate monomer is normally <1,000 mg/kg by static headspace gas chromatography. These values are representative for the grade; the certificate of analysis for the specific batch controls release limits.
Ethylene is incorporated as a comonomer in the polymer chain. This structural change reduces the quantity of external plasticizer required to achieve a flexible dried film. Neat dispersions of poly(vinyl acetate) homopolymer used in general wood assembly typically require 5–12% by weight of dibutyl phthalate or benzoate plasticizer on wet solids to bring the glass transition temperature below room temperature. Vinavil 2445 achieves film formation at low temperature without those additives because ethylene sequences disrupt crystallinity of the acetate domains. In tensile tests using ASTM D638-14 at 50 mm/min on films dried and conditioned at 23°C and 50% RH for 14 days, unfilled vinyl acetate-ethylene films of this class often show elongation at break of 300–600%, while unplasticized poly(vinyl acetate) films frequently fail below 10%. This difference eliminates plasticizer migration to paper and wood substrates, which is a known cause of bondline staining. The penalty is a decrease in surface hardness and a higher coefficient of friction compared with an unplasticized poly(vinyl acetate) homopolymer. The ethylene fraction also increases low-temperature wet tack on difficult substrates such as coated carton board and solvent-ink printed surfaces. When formulated wood adhesives are tested according to EN 204, the selection of durability class depends on the degree of crosslinking and filler package rather than on the base dispersion alone; Vinavil 2445 can be formulated to meet D2 or D3 class when combined with the appropriate hardener.
Particle size distribution measured according to ISO 13320 after dilution in deionized water shows a median volume diameter of 0.5–1.0 µm. The dispersion is stabilized by an anionic/non-ionic surfactant system; colloidal stability is reduced below pH 3.0 and visible coagulation occurs below pH 2.5. Cationic additives, including cationic starch and quaternary ammonium compounds, cause immediate flocculation when added without prior phase adjustment. Ammonium hydroxide or sodium bicarbonate may be used to raise pH to 5.5–6.5, but pH above 8.0 accelerates acetate ester hydrolysis and increases free acetic acid content. Shear stability is acceptable at 45% solids; undiluted material can generate grit if dissolver tip speed exceeds 80 m/min.
Batch release follows the manufacturer’s certificate of analysis. Table 1 gives the specification envelope used for incoming inspection when the material is received at a production site. ISO 2555 viscosity is checked on a sample tempered to 25.0°C for 2 h; if the result is outside the range, gentle stirring at 100 rpm for 10 min is allowed before re-check to eliminate thixotropic history.
| Property | Test method | Representative range |
|---|---|---|
| Appearance | Visual | White milky liquid |
| Non-volatile matter | ISO 3251 | 54–56% by mass |
| pH | ISO 976 | 4.0–5.5 |
| Brookfield RVT viscosity | ISO 2555 | 4,000–8,000 mPa·s |
| Minimum film-forming temperature | ISO 2115 | ≤5°C |
| Density at 25°C | ISO 2811 | 1.06–1.09 g/cm³ |
| Glass transition temperature | ISO 11357-2 | -2 to +6°C |
| Residual vinyl acetate monomer | Static headspace GC | <1,000 mg/kg |
| Median particle size | ISO 13320 | 0.5–1.0 µm |
On a 500 L stainless steel mixing vessel equipped with an anchor agitator and a high-speed dissolver, Vinavil 2445 is charged first. At dissolver speed 1,400 rpm with a 250 mm saw-tooth blade, batch temperature increases from 22°C to 28°C within 20 min; Brookfield viscosity falls by approximately 25% over this interval, so temperature-compensated viscosity control is required. Calcium carbonate with a median particle size of 10–15 µm is added at 250–400 rpm, raising viscosity from 4,000–8,000 mPa·s to 12,000–18,000 mPa·s. A 10 wt% poly(vinyl alcohol) solution is then metered at 1.5–2.5 L/min through a ring line to reach the target adhesive viscosity of 15,000–25,000 mPa·s. The finished adhesive is filtered through a 150 µm bag filter; accumulations after 8 h of running indicate pH drift or partial freeze-damage. Direct addition of multivalent metal salts such as aluminium sulfate at 0.1 M causes irreversible gelation within 60 s. The formulated adhesive is applied at 60–90 g/m² wet film weight with a rubber roll coater.
Open time on beech at 23°C and 50% RH is 6–10 min before fibre tear dominates. Set time is shortened by heated platens at 35–45°C and substrate moisture content of 8–12%.
In a side-by-side trial on a 1,200 mm wide laminator running at 60 m/min, equal dry polymer substitution of a styrene-butadiene latex with Vinavil 2445 increased fibre tear on uncoated kraft at coat weights above 6 g/m² dry. A Meyer bar coating at 0.15 mm wet film and a hot-air tunnel at 38°C produced a blocking-free roll surface after 5 min winding. The vinyl acetate-ethylene dispersion showed greater compatibility with oxidised starch than styrene-butadiene latex; a 20% starch addition on dry polymer raised wet bond strength without destabilising the dispersion. Peel force measured under ASTM D1876-08 at 25 mm/min was 2.8–4.5 N/25 mm on 250 g/m² kraft with fibre tear. If the complete formulation is certified, the grade may be considered under FDA 21 CFR 175.105 as an adhesive component for indirect food contact. Compared with styrene-butadiene latex, Vinavil 2445 has higher surface tack and lower odour; its moisture resistance in wet packs is lower unless a crosslinker or hydrophobic additive is used. Compared with an aqueous acrylic dispersion, it has higher initial tack on kraft and beech but lower ultraviolet-light stability and moisture resistance.
Table 2 provides a comparative experimental matrix for the three polymer types on identical test methods. The data are composite ranges from polymer science literature for equivalent copolymer compositions and are not batch limits or guaranteed values for a specific supplier lot.
| Property | Test method | Vinavil 2445 VAE | Plasticized PVAc homopolymer | SBR latex |
|---|---|---|---|---|
| Glass transition temperature | ISO 11357-2 | -2 to +6°C | 0–15°C depending on plasticizer | -45 to -5°C |
| Minimum film-forming temperature | ISO 2115 | ≤5°C | ≤5°C with plasticizer/coalescent | <0°C |
| Tensile elongation at break | ASTM D638-14 | 300–600% | 100–250% | 200–400% |
| T-peel on 250 g/m² kraft | ASTM D1876-08 | 2.8–4.5 N/25 mm, fibre tear | 4.0–6.5 N/25 mm, fibre tear | 2.0–3.5 N/25 mm, mixed failure |
The dispersion is not self-crosslinking. Water resistance in bonded assemblies is improved by adding 0.5–2.0% by mass of a glyoxal-based crosslinker, or by blending with a water-dispersible isocyanate at 5–10% on wet solids. Pot life after isocyanate addition is typically 2–4 h at 25°C. The dispersion is sensitive to freezing; storage at <5°C can produce grit and coagulation. Recommended storage is 5–35°C in sealed containers, with a shelf life of 6 months from production. At relative humidity above 75%, drying is retarded; forced air movement and substrate temperatures of 25–30°C are required. Avoid contact with strong acids, strong bases, and cationic polymers, which cause precipitation. The product is not formulated for immersion-grade bonds without the addition of a suitable hardener.
For regulatory status, the dispersion is supplied under REACH as a polymer; downstream users should confirm registration and food-contact status for the exact formulation, because monographs such as FDA 21 CFR 175.105 apply to the formulated adhesive rather than to a single raw material. Volatile organic compound content is low because coalescing solvents are not required; quantify residual monomer and volatile organic compounds by ISO 11890 or gas chromatography for label compliance.
Films of Vinavil 2445 cast at 500 µm wet thickness on silicone release paper and dried for 24 h at 23°C and 50% RH show tensile strength between 4 MPa and 8 MPa and elongation at break between 400% and 650% under ISO 527-3 at 50 mm/min. The fully dried film is not heat-sealable without a wet-bonding stage or addition of a thermoplastic tackifier. Heat reactivation at 60–80°C and 2–4 bar pressure may be used when the adhesive is formulated with a tackifier. Published data for this specific Vinavil 2445 configuration is limited; the stated film-property range reflects equivalent vinyl acetate-ethylene films with comparable ethylene content and is not a guaranteed batch value.
