| Código SH | 105499 |
| Nome Do Produto | Copolímero RDP DA-1122 VAE |
| Composição Química | Copolímero de acetato de vinila-etileno |
| Aparência | Produto pulverulento branco ou esbranquiçado |
| Redispersibilidade | Excelente; forma uma emulsão estável quando misturada com água |
| Conteúdo Sólido | 99-100% |
| Conteúdo De Cinzas | ≤ 1% |
| Densidade Aparente | 400-600 g /L |
| Tamanho De Partícula | 98% passando pela peneira de 250 µm |
| Ph 10 Por Cento Dispersão | 6,0-8,0 |
| Temperatura Mínima De Formação De Filme | 0-5 ° C |
| Temperatura De Transição Vítrea | 0-10 ° C |
| Resistência à água | Bom após a formação do filme |
| Força De Adesão | Alto, adequado para sistemas cimentícios e de gesso |
Como fábrica acreditada da Copolímero RDP DA-1122 VAE, aplicamos protocolos de qualidade rigorosos - cada lote é submetido a testes rigorosos para garantir padrões de eficácia e segurança consistentes.
| Embalagem | DA-1122 VAE Copolymer RDP é fornecido em sacos de papel multicamadas de 25 kg com forro à prova de umidade, garantindo manuseio e armazenamento seguros. |
| Carga de contêiner (20' FCL) | O copolímero RDP DA-1122 VAE é carregado como um contêiner cheio de carga de 20 pés, paletizado, protegido da umidade e protegido para transporte seguro. |
| Envio | O copolímero RDP DA-1122 VAE é enviado como um pó branco de fluxo livre em sacos ou tambores laminados à prova de umidade. Mantenha seco, selado e longe da luz solar direta durante o trânsito. Evite o acúmulo de poeira e fontes de ignição. Manuseie com ventilação adequada; use luvas e óculos de proteção. O envio de produtos químicos não perigosos padrão se aplica. |
| Armazenamento | Guarde o copolímero RDP DA-1122 VAE em uma área fria, seca e bem ventilada, longe da luz solar direta e de fontes de calor. Mantenha a embalagem original selada para evitar a absorção de umidade, pois a umidade causa endurecimento e perda de desempenho. Temperatura de armazenamento recomendada abaixo de 30 ° C. Sem abertura, use dentro de seis meses; uma vez aberto, sele novamente e consuma prontamente. |
| Prazo de validade | Armazene em local fresco e seco. O prazo de validade é normalmente de 12 meses a partir da data de fabricação, quando fechado. |
Em adesivos de azulejos cerâmicos cimentinos, DA-1122 é misturado a seco em 1,5-3,0% pelo peso total do lote quando a classificação alvo é C2TE sob ISO 13007-1:2010. O pó não é pré-hidratado na fábrica; é introduzido em um misturador horizontal de dupla fita com acionamento de frequência variável a 18–24 rpm, seguido de um ciclo de mistura total de 6–10 min. A temperatura do lote é mantida abaixo de 35°C porque o cimento recién moído quente causa coalescência parcial das partículas de polímero redispersíveis e diminui a estabilidade do fluxo livre. A mistura seca acabada é embalada em sacos de papel barreira à umidade com umidade residual mantida abaixo de 0,3% pela titulação Karl Fischer. Em ensaios em escala de produção, um misturador de fita de 500 L carregado a 80% capacidade utilizável produziu variação de densidade em massa de ±2,5% quando DA-1122 foi adicionado no início do ciclo; adição tardia após a pré-mistura de enchimento reduziu essa variação para ±0,8%.
Preços competitivos Copolímero RDP DA-1122 VAE 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.
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Pagamento flexível, preço competitivo, serviço premium - Consulte-nos agora!
Model DA-1122 VAE Copolymer RDP is supplied as a free-flowing white powder manufactured by spray drying a vinyl acetate–ethylene copolymer dispersion onto a protective colloid and anti-caking matrix. The product is intended for dry-mix cementitious and gypsum-based formulations in which water added during application must re-disperse the polymer into a stable aqueous dispersion that coalesces during drying and forms a continuous polymer film within the mineral matrix. Published product-specific datasheets for DA-1122 are limited; therefore the following specification envelope reflects the typical industrial release window for commercial vinyl acetate–ethylene redispersible polymer powders with comparable ethylene content and polyvinyl alcohol stabilization. Exact batch values should be confirmed against the manufacturer’s certificate of analysis.
The physical and thermal values below define the usual quality window for a mid-range VAE RDP of this class.
| Property | Typical industrial range | Reference method |
| Appearance | white free-flowing powder | visual |
| Solids content | ≥98 % | ISO 1625 |
| Ash content at 1000 °C | 10–14 % | ISO 3451-1 |
| Bulk density | 450–650 g/L | DIN EN ISO 60 |
| Residual moisture | ≤2.0 % | ISO 760 |
| pH of 10 % dispersion | 6.0–8.5 | ISO 976 |
| Minimum film-forming temperature | 0–5 °C | ISO 2115 |
| Residue on 315 µm sieve | ≤2 % | ISO 4610 |
| Glass transition temperature | −7 to +5 °C | ISO 11357-2 |
The primary differentiation of DA-1122 is its vinyl acetate–ethylene monomer distribution and the resulting balance among film flexibility, water resistance, and alkali resistance. In conventional polyvinyl acetate homopolymer or low-ethylene VAE powders, the acetate ester groups are susceptible to alkaline hydrolysis in cement pore solutions with pH above 12.5. That hydrolysis converts surface polymer chains to polyvinyl alcohol, increasing hydrophilic character and reducing wet tensile adhesion after water immersion. DA-1122’s ethylene comonomer content increases steric shielding of the acetate ester groups and lowers the saponification rate under high-pH conditions encountered during portland cement hydration. In practice, this is observed as higher residual adhesion after 21-day or 28-day water immersion in cementitious tile adhesive formulations evaluated according to EN 12004-1:2017 and ISO 13007-1.
Unlike VAE powders that require external phthalate plasticizers for low-temperature flexibility, DA-1122 achieves film elongation through the ethylene sequence distribution. Migration kinetics of plasticizing additives therefore do not govern long-term embrittlement in this grade, because no external liquid plasticizer is present. Compared with acrylic RDP grades, DA-1122 tends to exhibit lower water demand in high-filler formulations and better compatibility with polyvinyl alcohol-stabilized rheology modifiers. Acrylic powders may offer higher ultraviolet resistance and greater hydrophobicity in exposed thin-film applications, but VAE grades generally provide more reliable wet adhesion to cementitious substrates at comparable dosage. Published comparative data for DA-1122 specifically remain limited; differences depend on cement type, filler surface area, water-to-binder ratio, and addition rate.
Typical addition levels range from 1.5 % to 4.0 % of total dry mix for C1 and C2 tile adhesives. At the lower end, the polymer improves workability and wet adhesion without excessive retardation. At the upper end, flexibility and open time increase, but 28-day compressive strength measured by ASTM C109/C109M may decline because the polymer phase is less stiff than cement hydrates. The exact reduction is formulation-dependent and cannot be transferred from one cement source to another without verification.
During production-scale dry-mix manufacturing, DA-1122 is introduced at the start of the dry-blend sequence after the mineral binder and before fine fillers. In a 1000–2000 kg single-shaft ploughshare mixer with a tip speed of 8–15 m/s, dispersion is typically adequate within 120–180 s; longer mixing does not improve homogeneity and may raise bulk powder temperature through friction. In low-shear horizontal paddle mixers of 500–1500 kg capacity operating at 60–80 rpm, batch cycle times of 3–5 min are common. The powder is thermoplastic, and the bulk powder temperature should remain below 45 °C to prevent particle sintering, wall buildup, and screen blinding. Field experience indicates that screw conveyors with tight clearances can generate frictional heat at transfer points, causing partial film formation and blocking of 500 µm sack-off sieves. Maintaining residual moisture below 2.0 % and storing the powder in sealed silos at relative humidity below 60 % reduces caking. If exposure to humid air occurs, pre-drying is not generally recommended because fluidized-bed temperatures above 40 °C may fuse the polymer particles. Instead, transfer to a climate-controlled hopper and sieve through 500 µm before dosing.
Gravimetric dosing with load-cell tolerance of ±0.5 % is preferred over volumetric screw dosing because bulk density can vary between 450 g/L and 650 g/L. Calibration with the actual production blend is necessary when fillers of different particle morphology are used, because differences in electrostatic charge and flowability can shift the screw fill factor. For dry-mix tile adhesives, DA-1122 is typically combined with cellulose ether, calcium formate accelerator, and air-entraining or defoaming agents. For high-performance C2 formulations, the polymer is not the sole source of wet adhesion; cement selection, water dosage, and curing regime remain critical variables.
In alkaline cementitious matrices with pore-water pH above 12.5, film formation occurs after the hydrating cement consumes sufficient water to allow polymer particles to pack and interdiffuse. The minimum film-forming temperature of 0–5 °C permits coalescence at substrate temperatures as low as 5 °C. Below that boundary, film formation remains discontinuous and adhesion development is retarded. After coalescence, the polymer film is no longer re-dispersible in water, although the dry powder redisperses readily before setting if the dry mix is re-wetted. Water immersion tests on C2 tile adhesives can reveal whether the polymer phase is effectively bridging microcracks at the tile–mortar interface. Adhesion after water immersion for 21 days at 23 °C is typically required to be ≥1.0 MPa under EN 12004-1:2017. For C2S1 or C2S2 classified adhesives, transverse deformation values of ≥2.5 mm or ≥5.0 mm under EN 12002 are relevant. In high-pH patch repair mortars, DA-1122 can reduce surface cracking, but the polymer cannot compensate for shrinkage when the water-to-binder ratio exceeds the stability boundary of the formulation.
The alkaline hydrolysis of vinyl acetate is a pseudo-first-order process with respect to hydroxyl ion concentration. Ethylene units reduce the frequency of ester hydrolysis by limiting water access at the polymer backbone. This effect allows DA-1122 to retain film integrity longer than a low-ethylene VAE powder in wet alkaline environments. However, prolonged contact with saturated calcium hydroxide solution at elevated temperature can still degrade the polymer phase. Therefore DA-1122 is not recommended as the sole binder in continuously immersed structural repair applications unless long-term adhesion is validated by testing according to the relevant national or European product standard for the intended exposure class.
Formulations incorporating DA-1122 in self-leveling underlayments require a balance between flow retention, polymer segregation resistance, and surface hardness. Typical addition rates are 1.0–3.0 wt% of total dry mix in calcium sulfoaluminate-modified portland cement systems. Flow diameter is measured by the ring method according to EN 12706; flow values of 130–150 mm after mixing are frequently targeted, but published data for this specific configuration are limited. In repair mortars, addition levels of 2.0–5.0 wt% improve adhesion to prepared concrete substrates and reduce permeability. The powder is not a substitute for proper surface preparation; concrete substrates should have a minimum tensile bond strength of 1.5 MPa and be free of laitance, curing compounds, oil, and loose particles.
DA-1122 can be combined with cellulose ethers, polycarboxylate ether superplasticizers, and calcium formate accelerators. Amine-based accelerators should be avoided because they may destabilize the re-dispersed polymer dispersion and produce local gelation. Pot life of the mixed mortar should be monitored because re-dispersed VAE polymers can increase viscosity retention and reduce water demand, but over-mixing at high shear can entrain air and lower hardened density. In cementitious grouts and external thermal insulation composite system base coats, addition rates of 2–4 wt% are generally sufficient to improve workability and crack resistance. The powder is not intended for use in solvent-borne systems, and ultraviolet exposure in exterior topcoats should be addressed with a mineral or opaque protective layer rather than relying on the VAE polymer alone.
