| Código SH | 180456 |
| Aparência | Líquido branco leitoso |
| Conteúdo Sólido | 54-57 |
| Viscosidade Mpa S | 3000-9000 |
| O Ph | 4,5-6,5 |
| Temperatura De Transição Vítrea C | -10 a 5 |
| Temperatura Mínima De Formação Do Filme | 0-10 |
| Tamanho Da Partícula | 100-300 |
| Densidade G Cm3 | 1.05-1.10 |
| Tensão Superficial Mn M | 35-45 |
| De Acetato De Vinilo Residual | Menos de 0,5 |
| Estabilidade Ao Congelamento | Estável até 2 ciclos |
| Filme Tração Força Mpa | 8-15 |
Como uma fábrica acreditada (Emulsão VAE) de Emulsão de copolímero de acetato de vinilo-etileno, aplicamos protocolos de qualidade rigorosos - cada lote é submetido a testes rigorosos para garantir padrões de eficácia e segurança consistentes.
| Embalagem | Fornecido em tambores de 200 kg ou sacos de 1.000 kg, selados, rotulados, com informações de perigo para manuseio seguro. |
| Carga de contêiner (20' FCL) | 20 "FCL: Emulsão VAE carregada em flexitank ou tambores, guardada com segurança, selada para transporte seguro e eficiente. |
| Envio | O VAE Emulsion é enviado como uma dispersão aquosa não perigosa em tambores, bolsas ou navios-tanque a granel. Proteja-se do congelamento e do calor excessivo; mantenha os contêineres selados para evitar esfolamento. Garanta um carregamento seguro e vertical para evitar derramamentos. Transporte em condições ambientais com rotulagem adequada de acordo com os regulamentos locais. |
| Armazenamento | Armazene a emulsão VAE em recipientes originais bem fechados, longe da luz solar direta e de ácidos /bases fortes. Mantenha a 5 '35 ° C; evite o congelamento, que causa coagulação irreversível e calor excessivo. Use dentro do prazo de validade (normalmente 6' 12 meses). Gire o estoque e mexa suavemente antes de usar se ocorrer a separação. |
| Prazo de validade | A vida útil é tipicamente de 6 a 12 meses quando armazenado selado a 5 35 ° C; proteger do congelamento e da luz solar direta. |
Preços competitivos (Emulsão VAE) Emulsão de copolímero de acetato de vinilo-etileno que se ajustam ao seu orçamento - termos flexíveis e orçamentos personalizados para cada encomenda.
Para amostras, preços ou mais informações, entre em contato conosco em +8615380400285 Ou envie para sales2@liwei-chem.com.
Responderemos a você o mais rápido possível.
Telefone: +8615380400285
E-mail: sales2@liwei-chem.com
Pagamento flexível, preço competitivo, serviço premium - Consulte-nos agora!
Vinyl acetate-ethylene (VAE) copolymer emulsion is the product of pressure-induced radical copolymerization of vinyl acetate monomer with ethylene gas in an aqueous medium, stabilized by a protective colloid—typically partially hydrolyzed polyvinyl alcohol (PVOH)—and a nonionic/anionic surfactant package. The resulting milky-white dispersion, with total solids ranging from 50% to 60% by weight as determined by ISO 3251, carries submicron polymer particles (mean particle diameter 0.5–2.0 µm) wherein the random incorporation of 10–30 wt% ethylene segments disrupts polyvinyl acetate crystallinity, permanently reducing the glass transition temperature (Tg) to values between -20 °C and +15 °C and eliminating the need for external plasticizers. This intrinsic flexibilization, combined with the absence of formaldehyde-releasing monomers, positions VAE as a core binder in low-emission architectural coatings, wood and packaging adhesives, nonwoven textiles, and construction compounds, differentiating it fundamentally from plasticized polyvinyl acetate homopolymer dispersions, acrylic latexes, and styrene-butadiene rubber (SBR) latexes in terms of adhesion profile, wet strength, and aging behavior.
| Property | Method | Adhesive Grade (e.g., VAE-55E) | Paint Binder (e.g., VAE-20E) |
|---|---|---|---|
| Solids content | ISO 3251 (2 h/105 °C) | 55 ± 1% | 57 ± 1% |
| Brookfield viscosity | ISO 2555 (spindle 4, 20 rpm, 23 °C) | 2000–3000 mPa·s | 1000–2000 mPa·s |
| pH | ISO 976 | 4.0–5.0 | 4.5–5.5 |
| Minimum film formation temperature (MFFT) | ISO 2115 | < 1 °C | 12 ± 2 °C |
| Tg (midpoint, DSC) | ISO 11357-2 | -10 ± 2 °C | +10 ± 2 °C |
| Residual vinyl acetate monomer | GC headspace | < 500 ppm | < 300 ppm |
In woodworking adhesive applications, the capacity of VAE to penetrate open grain without excessive tack and to develop a thermosetting bond via the addition of aluminium chloride or glyoxal-based crosslinkers at 0.5–1.5 wt% yields joint performance meeting EN 204 D3 and, with post-cure, D4 water resistance. Viscosity profiles under shear, measured with a Brookfield RVT spindle 4 at 20 rpm, reveal pseudoplastic indices of 2.5–4.0, which assist in roller-coating transfer efficiency on high-speed (50–100 m/min) packaging lamination lines while avoiding misting incidents that plague low-shear Newtonian acrylic solutions. Pre-catalysed systems must be processed within a pot life of 4–8 h at 23 °C; exceeding this window results in a catastrophic viscosity rise above 50 000 mPa·s and irreversible gelation.
PVOH-stabilized VAE emulsions typically withstand 1–3 freeze-thaw cycles per ISO 1147 before detectable coagulum exceeds 0.1 % on a 40 µm filter. The failure mechanism is ice-crystal-induced compression of the hydrated PVOH layer, leading to inter-particle fusion upon thawing. Modification with 5–10 phr of a latex-compatible glycol ether (e.g., dipropylene glycol methyl ether) or blending with 20–30 wt% of a surfactant-stabilized acrylic dispersion extends cycle tolerance to 5–7 cycles but reduces dry film tensile modulus by 15–25% as measured per ASTM D882. Storage below +5 °C is prohibited unless the formulation is engineered for cold-chain distribution; recommended warehouse temperature is +5 to +35 °C.
In Exterior Insulation Finish Systems, VAE serves as the primary binder in cementitious basecoats laminated over expanded polystyrene (EPS) boards per ASTM C578. Pull-off adhesion testing in accordance with ASTM D4541 yields values consistently above 0.15 MPa, with cohesive failure occurring within the EPS substrate rather than at the interface, even after 2000 h of accelerated weathering (QUV-B, ASTM G154 cycle 1). This performance derives from the ethylene moiety’s affinity for the polystyrene surface and the emulsion’s low glass transition temperature, which enables ambient film coalescence within the open pores of the insulation. Operational boundary: unprotected exposure to standing water pH > 9 for periods exceeding 72 h leads to saponification of acetate ester linkages and a rapid adhesion decay of 40–60%; a synthetic stucco topcoat is mandatory within 14 days of basecoat application.
In air-laid and wet-laid nonwoven consolidation, VAE binders with a Tg of -5 °C to +5 °C are sprayed at 10–25% solids dilution, delivering dry tensile indices of 8–12 N·m/g in cross-direction per ISO 1924-2 while maintaining tactile softness. The self-crosslinking functionality, activated at 130–150 °C during through-air drying, creates water-insoluble yet breathable networks with hydrohead values of 40–80 mm water column, outperforming conventional PVAc binders that require external thermosetting resin additives and emit formaldehyde. Incompatibility: combination with amine-rich antistatic agents (e.g., quaternary ammonium salts above 0.2 wt% on binder solids) accelerates hydrolytic degradation and results in emit levels of acetic acid exceeding 10 ppm in finished goods.
Increasing ethylene incorporation beyond 25 wt% drives the Tg below -15 °C and produces films with a storage tensile modulus measured by dynamic mechanical analysis (1 Hz, 23 °C, ISO 6721-1) of less than 5 MPa. While advantageous for ultra-flexible adhesives, this regime introduces a creep compliance above 2 GPa⁻¹ under a 1 MPa static load (ISO 899-2, 23 °C/50% RH), rendering the polymer unsuitable for structural joints requiring permanent load-bearing capacity. Processing window narrows: hot-melt reactivation temperature must be controlled within ±3 °C of 60 °C to avoid cohesive splitting, as observed on twin-belt laminators with infrared zone length of 1.5 m and belt speed of 25 m/min.
| Attribute (Test Method) | VAE Emulsion | PVAc Homopolymer (Plasticized) | Acrylic Copolymer Emulsion | SBR Latex |
|---|---|---|---|---|
| External plasticizer requirement | None | 5–15% DBP or DIBP | None | None |
| VOC content, ready-to-use (EN 16000-1) | < 0.5 g/L | 50–150 g/L | < 1 g/L | < 1 g/L |
| Adhesion to LDPE (*peel, ASTM D903) | 3–5 N/25 mm | < 1 N/25 mm | 1–2 N/25 mm (primer required) | 1–3 N/25 mm |
| UV resistance (QUV-B 500 h, ASTM G154) | Slight yellowing, ΔE 2–4 | Severe yellowing, ΔE 8–12 | Non-yellowing, ΔE < 1 | Severe yellowing, ΔE 10–15 |
| Alkali resistance (immersion pH 12, 28 d) | Moderate loss (20–30% tensile) | Poor (film dissolves) | Excellent (< 5% loss) | Excellent (< 10% loss) |
| Relative raw-material cost index | 1.0–1.2 | 0.8–1.0 | 1.5–1.8 | 0.9–1.1 |
For textile-to-film lamination, VAE’s ethylene sequences enable heat-seal activation at 60–70 °C, well below the softening point of polyurethane ether films (80–100 °C), preventing film shrinkage and gloss variation. On rotary drum laminators operating at 0.5–1.0 MPa nip pressure, bond strengths exceed 2.5 kg/25 mm (ISO 2411) without pre-treatment of the polyurethane surface. Limitations: the acetic acid off-gassing during heat-sealing must be controlled to below 5 mg/m³ workplace concentration (ACGIH TLV), and the emulsion must be formulated without zinc oxide thickeners, which induce pre-gelation at temperatures above 50 °C.
VAE emulsions suitable for indirect food contact are formulated under FDA 21 CFR 175.105 and BfR Recommendation XIV, provided the ethylene content does not exceed the specified limits and residual monomer levels remain below 0.05 % for vinyl acetate. Indoor air emissions testing per EN 717-3 records formaldehyde release below 10 ppm, qualifying the product for E1 classification. REACH registration (EC No. polymer) is maintained for all standard grades; substances of very high concern (SVHC) are absent from the supply chain at concentrations above 0.1 wt%. When used in paper and board packaging intended for direct food contact under EU No 1935/2004, the final film must be tested for overall migration per OM2 conditions (40 °C/10 days, simulant A, B, D2), with the typical VAE barrier achieving < 10 mg/dm².
