| HS Code | 611830 |
| Polymer Type | Vinyl Acetate Ethylene (VAE) Copolymer |
| Appearance | White Powder |
| Solid Content | ≥98% |
| Ash Content | ≤12% |
| Bulk Density | 400-600 g/L |
| Particle Size | ≥90% through 100 mesh |
| Ph Value 10 Dispersion | 6.0-8.0 |
| Viscosity 5 Solution | 500-1500 mPa·s |
| Minimum Film Forming Temperature | 0-5°C |
| Tensile Strength | ≥5 MPa |
As an accredited DA-1200 VAE Copolymer RDP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | DA-1200 VAE Copolymer RDP is packaged in 25 kg multi-layer kraft bags with PE liner, palletized and shrink-wrapped for protection. |
| Container Loading (20′ FCL) | DA-1200 VAE Copolymer RDP is packed in palletized bags, shrink-wrapped, and secured inside a 20′ FCL container for safe transport. |
| Shipping | DA-1200 VAE Copolymer RDP is shipped in moisture-proof multilayer bags, typically 25 kg each, palletized and wrapped. Store in cool, dry conditions away from moisture. Avoid prolonged high humidity during transport. Handle with care to prevent bag damage and ensure dry, ventilated containers. |
| Storage | Store DA-1200 VAE Copolymer RDP in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and moisture. Keep the container tightly sealed to prevent absorption of humidity or caking. Place on pallets to avoid damp floors. Use within six months of receipt while unopened, and reseal immediately after use for extended stability. |
| Shelf Life | Shelf life: 12 months from production date when stored unopened in a cool, dry place. |
Formulation of a C2TE-class cementitious tile adhesive with DA-1200 VAE copolymer RDP places the powder at 2.0–4.0 wt% of total dry mix on a CEM I 42.5R Portland cement base, graded quartz sand 0.1–0.5 mm, cellulose ether at 0.3–0.6 wt%, and calcium formate accelerator at 0.5–1.5 wt%. The powder is introduced into a twin-shaft compulsory mixer with a shaft speed differential of 1:2.4; dry blending proceeds for 180–240 s at 45–55 rpm to avoid heat-induced caking above 40°C. Wet mortar is mixed under EN 196-1 at 140 ± 5 rpm and 285 ± 10 rpm, with water demand adjusted to 0.20–0.24 w/b to produce a notched-trowel consistency. Slip resistance is evaluated under ISO 13007-2:2017 using large-format porcelain tiles and an imposed load of 5 kg; slip below 0.3 mm after 20 min is targeted for wall applications.
Open time is recorded as tensile adhesion after 20 min skin formation under EN 1346; C2TE-class mixtures require normal-storage tensile adhesion of at least 1.0 N/mm² under EN 1348 and extended open time of at least 0.5 N/mm² after 30 min. Heat-age retention is measured after conditioning at 70°C for 14 d per EN 1348; the VAE copolymer film contributes by bridging microcracks at the interface between the hydration products and the tile surface. The ethylene comonomer in the DA-1200 backbone lowers minimum film formation temperature below 5°C, permitting film coalescence at low ambient temperatures. Production failures observed on high-speed lines include localized lumping near the mixer blades when liquid and powder are introduced simultaneously at 285 rpm; balanced two-stage addition with 60 s pre-wetting reduces lump formation.
| Application | Standard | Test condition | Required result |
|---|---|---|---|
| Cementitious tile adhesive | ISO 13007-2:2017 | Normal storage tensile adhesion | ≥1.0 N/mm² |
| Cementitious tile adhesive | EN 1346 | Shear adhesion after open time | ≥0.5 N/mm² |
| ETICS base coat | EAD 040083-00-0404 | Adhesion to EPS | ≥0.08 N/mm² with EPS cohesion failure |
| Self-leveling underlayment | EN 13813 | 28 d compressive | CT-C25-F6 or project-specified class |
| Repair mortar | EN 1504-3 | 28 d compressive | Class R4 ≥45 N/mm² |
| Gypsum skim coat | EN 13279-1 | Vicat initial set | ≤120 min |
| Tile grout | EN 13888 | Low water absorption | CG2WA < 2 g after 30 min; < 5 g after 240 min |
In thin-bed exterior thermal insulation composite systems, the base coat is mixed with 2.5–4.0 wt% DA-1200 VAE copolymer RDP on dry mortar mass, CEM I 52.5R white Portland cement, 0.1–0.3 mm limestone filler, cellulose ether, and alkali-resistant glass fiber mesh. The dry blend is prepared in a horizontal plowshare mixer at 80–100 rpm for 120–180 s; the base coat is spray-applied with a worm pump at 15–25 bar in a two-coat process. The first coat is troweled, the 160 g/m² alkali-resistant mesh is embedded, and the second coat is applied to a total thickness of 3–5 mm.
Adhesion to expanded polystyrene under EAD 040083-00-0404 is evaluated after hydrothermal cycling; destructive pull tests typically record cohesive failure in the EPS board at ≥0.08 N/mm². Impact resistance, tested as hard-body and perforation resistance per ETAG 004, depends on polymer film bridging of microcracks after 50 freeze-thaw cycles. The critical threshold in production is at 2.0 wt% DA-1200: below this level, the base coat is brittle and shows mesh pattern telegraphing. Above 4.5 wt%, air entrainment exceeds 8% and the 28-day compressive strength can fall below 6.0 N/mm², which is often unacceptable for high-rise wind-load zones. Site records from continuous mixing plants show powder bridging at the silo cone when the dew point exceeds 12°C and retention time exceeds 48 h.
Self-leveling underlayment compounds are formulated with 1.5–3.5 wt% DA-1200 VAE copolymer RDP on dry mix weight, alumina cement or OPC/calcium sulfate blends, polycarboxylate superplasticizer, calcium sulfate anhydrite, and defoamer. The powder is introduced through a weigh-belt auger into a twin-shaft continuous mixer. The process conflict in this system is that the VAE powder carries protective colloid and residual surfactant, which stabilize entrained air when the slurry is mixed with a pin mixer at 900–1,200 rpm. Air content is measured by the EN 1015-7 basket method and is held below 3.5%.
Flow ring spread is assessed under EN 12706; an initial spread of 240–260 mm after 5 min is maintained with polycarboxylate at 0.20–0.35% and water demand at 0.18–0.22 w/b. For North American project specifications, ASTM C1708 cone flow is also reported. Compressive strength at 28 d is classified under EN 13813 as CT-C25 or higher; flexural strength above F6 requires sufficient polymer film after drying. Published data for this specific configuration with DA-1200 in calcium sulfate-rich systems is limited; preliminary site records indicate that silo retention beyond 72 h at relative humidity above 60% causes caking at the discharge butterfly valve. Dry-air purging at 0.5–1.0 bar and maximum storage temperature of 35°C are therefore specified.
Restoration of spalled concrete margins, beam soffits, and chloride-contaminated cover zones is executed with a polymer-modified repair mortar containing 2.0–5.0 wt% DA-1200 VAE copolymer RDP on dry mortar mass, CEM I 42.5R, 0.1–0.5 mm quartz sand, silica fume at 3.0–8.0 wt%, and a shrinkage-compensating mineral filler. The dry mix is blended in a low-speed forced action mixer at 60–80 rpm; it is hand-applied or wet-sprayed after activation with 0.13–0.17 w/b. The polymer addition reduces compressive modulus and increases tensile strain capacity, but each 1.0 wt% increase in DA-1200 above 3.0 wt% can lower 28-day compressive strength by approximately 2–6% depending on curing humidity. Compliance with EN 1504-3 class R4 requires 28-day compressive strength ≥45 N/mm² and class-specific chloride ion diffusion limits. The alkaline environment raises pH to 12.5–13.5, which is sufficient to destabilize some incompatible admixtures before film coalescence is complete; amine-based hardeners and acidic phosphate accelerators are therefore avoided.
In gypsum skim coat and jointing compounds, DA-1200 VAE copolymer RDP is charged at 1.5–3.0 wt% on dry mix weight with fine calcium sulfate hemihydrate, 0.1–0.2 mm limestone filler, starch ether, and a set retarder. Mixing is performed with a high-shear disperser at 600–900 rpm for 60–90 s, followed by 60 s induction and a second low-shear mixing at 300 rpm. Polymer films raise surface hardness and flexural crack resistance under EN 13279-1. Above 3.5 wt% dosage, sanding dust often becomes tackier and clogs abrasive screens above P120 grit; the threshold is experienced as reduced stock removal rather than a change in bulk dry density. Set time is retarded by the powder’s protective colloid, so the formulator compensates with sulfate-based accelerator at 0.05–0.15 wt% to hold Vicat initial set below 120 min. No published DA-1200-specific viscosity curve is available for gypsum systems; current site data is limited to production batches above 1,000 kg.
At 1.5–3.5 wt% dosage on dry mix weight, cementitious tile grout for swimming pools and wet rooms is dry-blended with white CEM I 42.5R, 0.05–0.2 mm quartz filler, organic rheology modifier, and inorganic pigments. Water demand is kept at 0.22–0.26 w/b to achieve a dense cured matrix; the powder contributes to low water absorption and improved flexural strain after 7 d wet cure. Workability loss is monitored by a 45–60 min pot life. The cured grout is classified under EN 13888 as CG2WA when low water absorption of 2 g after 30 min and 5 g after 240 min is demonstrated. Efflorescence risk increases in high-humidity curing if the joint is tooled with a wet sponge before the initial set; oxide-pigmented batches may show color shift above 3.5 wt% dosage.
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DA-1200 is a spray-dried redispersible polymer powder based on a vinyl acetate–ethylene copolymer, stabilized with a polyvinyl alcohol protective colloid and surface-treated with a mineral antiblocking agent. The product is used as a cement- and gypsum-compatible binder modifier in dry mortar formulations, with the model designation identifying a VAE copolymer grade developed for controlled film formation in alkaline substrates. In a typical batch, the non-volatile fraction exceeds 98 %, while the ash residue and bulk density remain within defined bands that support gravimetric dosing in automated dry mortar plants. The particle size distribution after redispersion is critical: the powder must disintegrate into latex particles in the 0.5–8 µm range under low-shear mixing to avoid agglomerates that reduce tensile adhesion. DA-1200 differs from vinyl acetate homopolymer powders by the incorporation of ethylene, which lowers the minimum film-forming temperature and reduces the need for external coalescing aids. Compared with acrylic powders, the VAE backbone provides stronger cement compatibility and a sharper early strength build under wet conditions, although exterior UV exposure is lower. The product is supplied in the form of a free-flowing powder and is intended for dry blending with Portland cement, calcium aluminate cement, anhydrite, hemihydrate, and selected mineral fillers.
Redispersion is governed by the protective colloid layer, which dissolves in water at pH 6–12 and releases the original latex particles. In a planetary mortar mixer operating at 140–285 rpm, the powder must be added to the pre-dispersed mineral suspension after the cement and fine aggregate have been wetted for 15–30 s. If the powder is added simultaneously with high-range water reducers, competition for free water can produce a transient viscosity increase that causes mass balling and uneven film formation. The redispersed particle size should be checked by laser diffraction after dispersing 5 g of powder in 100 mL of deionized water at 23 °C without high-speed shear; the median particle diameter should fall below 8 µm. In production-scale forced-action mixers, redispersion completion is normally observed after 90–120 s of wet mixing, provided the water-to-powder ratio is within the range recommended for the specific mortar.
Batch release testing of DA-1200 in dry mortar plants uses the following specification band. The values are not substitutes for the lot-specific certificate of analysis, because ash content and residual moisture shift with spray-drying conditions and the final antiblocking treatment.
| Property | Test method | Specification range | Test condition |
|---|---|---|---|
| Solids content | ISO 1625 | ≥98 % | 105 °C, 2 h |
| Ash content | ISO 3451-1 | 10–14 % | 1000 °C |
| Bulk density | DIN EN ISO 60 | 450–650 g/L | Loose pour, 23 °C |
| Residual moisture | ISO 15512 | ≤1.5 % | Karl Fischer |
| pH at 20 % dispersion | ISO 976 | 6.0–8.0 | 23 °C |
| Screen oversize | ISO 3310-1 | ≤1.0 % | 315 µm sieve |
| Minimum film-forming temperature | ISO 2115 | 0 ± 3 °C | Film from 50 % dispersion |
Deviations outside the ash-content band alter the polymer-to-cement ratio at a fixed powder dosage. For a 2 % powder addition, an ash shift of +1 percentage point removes approximately 0.02 % active polymer in the total dry mix, which can reduce wet adhesion by more than the measurement scatter of EN 12004 tensile testing.
Ethylene comonomer units interrupt vinyl acetate crystallinity and act as an internal plasticizer. DA-1200 films formed from a 50 % dispersion exhibit a minimum film-forming temperature near 0 °C, while vinyl acetate homopolymer powders typically show 15–20 °C. This difference allows cementitious tile adhesives to develop coalesced polymer bridges on wet substrates at application temperatures down to 5 °C, provided the hydration rate of cement is maintained with suitable accelerators. Tensile testing of free films per ASTM D638-14 shows lower ultimate stress and higher strain at break for VAE copolymers than for styrene-acrylic powders; this is the intended trade-off for flexible deformable adhesives classified under ISO 13007-2. In cementitious systems, the polymer film must remain intact in pores with pH above 12.5. The vinyl acetate segments can undergo alkaline hydrolysis if the film is exposed to sustained wetting and high pH, but the ethylene units and polyvinyl alcohol colloidal stabilizer reduce the saponification rate relative to unmodified polyvinyl acetate powders.
In bulk silo handling, DA-1200 should be transferred with dried compressed air; a conveying-air dew point below −20 °C is typical in European dry mortar plants. Bags opened at relative humidity above 60 % must be consumed within 30 min to prevent surface caking. The powder is incompatible with borate-containing retarders and with cationic additives that can destabilize the redispersed latex; this can appear as grit formation on the trowel after mixing. In cementitious self-leveling underlayments containing polycarboxylate ether superplasticizers, a DA-1200 dosage above 8 % of dry mix may increase plastic viscosity to a level that reduces flow diameter by more than 30 mm in the 30 min flow test of ASTM C1708/C1708M-21. The effect is not a chemical incompatibility but a rheological overload, and it can be avoided by adjusting the superplasticizer type or by delaying powder addition until the mineral fraction is fully wetted. In twin-shaft paddle mixers with a net mixing time of 120–180 s, DA-1200 is dry-mixed with the mineral fraction for 60–90 s before water addition; adding DA-1200 directly to the water stream creates polymer-rich lumps that survive 120 s wet mixing. Batch-to-batch variance in bulk density of ±30 g/L can shift volumetric dosing accuracy by ±5 % when auger speed is not corrected by weight feedback. Gravimetric dosing is therefore preferred for C2 adhesive lines. In continuous dry-mix plants, the powder addition point should be located downstream of the first mineral dosing belt and upstream of the high-speed pin mixer to prevent segregation. If the powder is transported in dilute-phase pneumatic conveyors, line velocity above 25 m/s may break the antiblocking mineral shell and increase dusting without changing redispersibility.
Adhesion strength is evaluated on concrete slabs bonded with ceramic tiles after 28 d standard cure and after defined water immersion, heat ageing, and freeze–thaw cycles. For a C1-type adhesive under EN 12004, the tensile adhesion strength must remain at or above 0.5 N/mm² in all storage conditions, while C2-type adhesives must remain at or above 1.0 N/mm². DA-1200-formulated adhesives are designed to retain adhesion after water immersion because the ethylene segments limit excessive water uptake and film swelling. In performance trials with a 3 % powder dosage, the water-immersion adhesion is typically within 0.6–0.9 N/mm² on non-absorbent porcelain tiles, depending on cement type, cellulose ether viscosity, and open-time additives. Freeze–thaw performance is influenced by the air-void structure and polymer film flexibility; VAE-modified mortars retain a lower modulus in frozen conditions than styrene-acrylic-modified mortars, which reduces stress at the tile–mortar interface. Differential scanning calorimetry of cured mortar with DA-1200 shows a polymer glass transition range rather than a sharp transition, consistent with ethylene heterogeneity. Air content measured by EN 1015-7 should remain below 20 % for cementitious tile adhesives; higher values reduce compressive strength and increase freeze–thaw damage. The powder also acts as a water-retention aid, but the main water retention is supplied by cellulose ether. A combined dosage of 0.3–0.5 % cellulose ether and 2.5–4.0 % DA-1200 is common for wall-tile adhesives. For large-format porcelain tiles, a C2E adhesive with DA-1200 typically achieves 20–30 min open time and ≤0.5 mm slip under EN 12004 test conditions. Published comparative data for nonstandard artificial stone substrates is limited. In calcium aluminate-cement blends, DA-1200 at 3–6 % improves abrasion resistance and lowers surface dusting after 28 d. Flow diameter measured by ASTM C1708/C1708M-21 can decrease by 15–30 mm at constant water demand when the dosage exceeds 6 %; formulators compensate with polycarboxylate ether superplasticizer at 0.1–0.3 %. The powder is also used in external thermal insulation composite systems as a base coat polymer at 3–5 % on dry mix, where it improves adhesion to expanded polystyrene and mineral wool but requires a compatible hydrophobizing agent to limit water uptake under ETAG 004 exposure regimes.
Replacement of acrylic powders with DA-1200 changes the cured film response. The VAE copolymer has lower ultraviolet resistance than all-acrylic films; therefore exterior base coats with direct exposure should be protected by a finish coat or pigmented topcoat. The advantage appears in wetting and adhesion to concrete: the VAE dispersion maintains low interfacial surface tension and tolerates alkaline pore water without excessive surfactant migration. In contrast, some acrylic powders contain anionic surfactants that retard cement hydration at high dosage; the effect is visible as a delay in setting time of 30–60 min in calorimetry tests at 20 °C. DA-1200 does not usually require APEO-containing wetting agents, which supports compliance with REACH restrictions on nonylphenol ethoxylates. In styrene-acrylic systems, the styrene comonomer raises film hardness and water resistance but reduces elongation; replacement with DA-1200 lowers tensile strength while increasing strain capacity. The table below summarizes property windows reported in technical literature for the main powder classes.
| Powder class | MFFT | Film water absorption after 7 d, 23 °C | Adhesion retention after water immersion | Alkali resistance |
|---|---|---|---|---|
| VAE copolymer | 0–4 °C | 10–20 % | 60–90 % of dry adhesion | No dissolution after 28 d in saturated Ca(OH)2 |
| Acrylic | <0 °C | 5–15 % | 70–100 % | No dissolution after 28 d in saturated Ca(OH)2 |
| Styrene–acrylic | 5–15 °C | 5–12 % | 70–100 % | No dissolution; harder film |
| Vinyl acetate homopolymer | 15–20 °C | 20–35 % | 40–60 % | Film softening after 7 d in saturated Ca(OH)2 |
Published comparative data for DA-1200 in lightweight gypsum board beyond 5 % dosage is limited; formulators should verify blocking resistance and flexural strength using plant-specific core density. Hydration tests in Portland cement systems indicate that the VAE powder does not suppress early ettringite formation, but delayed addition is recommended when high-alumina cements and lithium carbonate accelerators are present because the protective colloid can temporarily reduce the availability of mixing water at the aluminate grain surface.
