| HS Code | 638398 |
| Appearance | white powder |
| Polymer Type | vinyl acetate-ethylene copolymer |
| Particle Size | ~100 mesh (through 0.15 mm sieve) |
| Bulk Density | 400-600 g/L |
| Solid Content | ≥99% |
| Ash Content | 10-15% |
| Ph | 7.0-9.0 (25% aqueous dispersion) |
| Minimum Film Forming Temperature | 0-5°C |
| Tensile Strength | ≥4.0 MPa (7-day film) |
| Elongation At Break | ≥300% (7-day film) |
As an accredited DA-1220 VAE Copolymer RDP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | DA-1220 VAE Copolymer RDP is packaged in 25 kg moisture-proof polyethylene-lined paper bags for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL container loading: DA-1220 VAE Copolymer RDP in palletized, moisture-protected bags, safely secured and ventilated for transport. |
| Shipping | DA-1220 VAE Copolymer RDP is shipped as a free-flowing powder in 25 kg multilayer paper bags with PE liners, palletized and stretch-wrapped for protection. Keep dry, cool, and away from sunlight during transit. Handle gently to avoid bag damage. Not classified as dangerous goods for transport. |
| Storage | Store DA-1220 VAE Copolymer RDP in a cool, dry, well-ventilated area, away from direct sunlight, heat, and moisture. Keep in original sealed packaging and avoid damaging bags. Protect from humidity and rain during transport and storage. Recommended storage temperature is below 30°C. With proper storage, shelf life is approximately 12 months. |
| Shelf Life | Shelf life is typically 12 months from manufacture when stored unopened in a cool, dry place. |
In cementitious dry-mix manufacturing, DA-1220 VAE copolymer redispersible polymer powder is introduced as a spray-dried organic co-binder to modify pore structure, control shrinkage-induced stress, and improve adhesion to non-porous substrates after film coalescence at ambient curing temperatures. The following downstream application scenarios are limited to verified industrial segments for vinyl acetate–ethylene copolymer RDPs in construction chemicals.
| Application segment | Primary compliance framework | Typical DA-1220 addition range | Critical performance test |
|---|---|---|---|
| Ceramic tile adhesives | EN 12004-1:2017 | 2.0–3.5 wt% | EN 1348 tensile adhesion |
| ETICS base coats and adhesives | ETAG 004 / EAD 040083-00-0404 | 2.5–4.0 wt% | Adhesion to insulation and hard body impact |
| Self-leveling underlayments | EN 13813:2002 | 1.5–3.5 wt% | Compressive/flexural class and flow retention |
| Cementitious waterproofing slurries | EN 14891:2017 | 2.0–3.5 wt% | Crack bridging and water impermeability |
| Gypsum joint fillers and skim coats | EN 13963:2014 / ASTM C475/C475M-17 | 1.5–2.5 wt% | Setting time and bond to gypsum board |
| Concrete repair mortars | EN 1504-3:2005 | 1.5–3.5 wt% | EN 1542 pull-off adhesion |
In ceramic tile adhesive production, DA-1220 is dry-blended with CEM I 52.5 R or CEM II/A-LL 42.5 R cement, graded quartz sand in the 0.1–0.6 mm range, limestone filler with median particle size near 20–40 µm, and cellulose ether water-retention agent in a horizontal ploughshare mixer operating at 120–180 rpm for 3–5 min per batch. Addition of DA-1220 at 2.0–3.5 wt% of total dry mortar is used for C2-class systems because the coalesced polymer film bridges microcracks, lowers interfacial porosity against porcelain stoneware, and improves tensile adhesion after water immersion. Products classified under EN 12004-1:2017 as C2 must achieve tensile adhesion of at least 1.0 N/mm² after water immersion, heat ageing, and freeze-thaw cycling when tested according to EN 1348; at DA-1220 addition below 1.5 wt%, water immersion adhesion on low-porosity substrates often falls below the required threshold, while addition above 4.0 wt% may retard cement hydration by surface adsorption on cement grains and reduce early cohesive strength. Production-scale dosing uses loss-in-weight screw feeders with dynamic weighing accuracy of ±0.5%; powder moisture above 1.5 wt% after storage at relative humidity above 60% causes bridge formation in silo discharge and lumping during subsequent wet mixing. The mixed dry product is discharged into valve bags with a residual moisture target below 0.5 wt%. Terminal finished goods include polymer-modified thin-bed adhesives for large-format porcelain tiles, deformable adhesives for underfloor heating, and rapid-setting tile adhesives where the polymer addition is balanced against accelerator dosage to retain EN 12004-1:2017 early strength requirements.
In external thermal insulation composite system base coats and insulation board adhesives, DA-1220 is introduced at 2.5–4.0 wt% of the dry mortar mass to improve adhesion to expanded polystyrene, extruded polystyrene, and mineral wool substrates. The applicable compliance framework is ETAG 004 / EAD 040083-00-0404; the base coat must demonstrate adhesion to insulation such that failure is cohesive within the insulation board rather than at the polymer-cement interface, and hard body impact resistance of the kit is classified at 3 J, 10 J, or 20 J. Production mixing uses a forced-action ploughshare mixer with peripheral speed 2.5–3.5 m/s; cement and fillers are pre-mixed for 90–120 s, followed by dispersion of DA-1220 and cellulose ether through a side-mounted hopper over 30 s to avoid wetting-induced agglomeration. At addition levels above 4.5 wt%, the continuous polymer phase lowers the tensile strength of the cured base coat and can produce local tensile creep under sustained suction from fired clay brick, a known failure mode on south-facing façades. At addition below 2.5 wt%, impact propagation in the glass fibre mesh layer may exceed acceptable crack widths under 3 J impact. The mixed mortar is applied by spray or stainless steel trowel as an adhesive layer for insulation boards and as a first embedding layer incorporating alkali-resistant glass fibre mesh with mass per unit area of 160–220 g/m². Terminal products are one-component adhesive and base coat mortars for ETICS kits, sold as dry-mix powder in 25 kg paper valve bags and mixed on site with 21–26% water by dry mortar weight.
Where floor substrates require pump-applied planarisation before vinyl, luxury vinyl tile, or large-format ceramic installation, cementitious self-leveling underlayments use DA-1220 at 1.5–3.5 wt% of total dry mortar to control segregation, reduce surface bleeding, and bond to primed concrete substrates. The dry formulation typically combines ordinary Portland cement, calcium sulfoaluminate cement or alpha-hemihydrate gypsum for controlled expansion, fine quartz and calcium carbonate filler, a polycarboxylate ether superplasticizer, and defoaming agent. The relevant performance standard is EN 13813:2002; mixed screeds are classified by compressive strength class C20–C35 and flexural strength class F4–F7 depending on the intended static and dynamic loads. Fresh mortar is mixed at a water-to-powder ratio of 0.18–0.23 with a slow-speed paddle mixer at 300–500 rpm for 2–3 min, followed by a 2 min de-airing rest before pump discharge into the application zone. On production lines, DA-1220 addition above 3.5 wt% has been observed to increase the yield stress of the ready-mixed slurry after 20–30 min, producing step-over marks at successive pour interfaces and reducing final surface flatness; below 1.5 wt%, water bleeding increases and surface dusting appears after drying. Because published data for DA-1220-specific flow retention under all job-site temperature and humidity combinations is limited, full-scale trial batches on concrete substrates are required to establish the final dosage. Terminal products include pumpable self-smoothing underlayments for indoor renovation, deep-fill leveling mortars with coarse aggregate up to 1.0 mm, and low-stress underlayments for moisture-sensitive wood floor installation.
One-component cementitious waterproofing dry-mix products incorporate DA-1220 at 2.0–3.5 wt% of the dry component to form a flexible polymer-cement interpenetrating network after hydraulic curing and film coalescence. The cured slurry is assessed under EN 14891:2017, where the flexible membrane category requires crack bridging at 0.75 mm or 1.0 mm after defined conditioning; water impermeability under hydrostatic pressure is also verified. In dry-mix production, the powder is blended with CEM I 52.5 R or CEM II/A-LL 42.5 R, quartz filler, and a water-reducing agent in a continuous double-shaft mixer equipped with an infrared moisture probe; residual moisture of the polymer powder must remain below 1.5 wt% because higher moisture causes lump formation during site mixing with 20–25% water. The mixed slurry is applied by nylon brush, roller, or notched trowel in total thickness 1.5–2.0 mm over concrete, cement render, or gypsum board after priming. At addition rates above 4.0 wt%, the slurry may entrain excess air during mixing and develop persistent surface tack under high humidity; below 2.0 wt%, elongation at break is generally insufficient to bridge cracks beyond 0.5 mm. Terminal products include one-component brush-applied waterproofing slurries for bathrooms, balconies, terraces, and external concrete walls, as well as waterproofing base layers beneath decorative tile finishes. These materials are packaged in 20 kg or 25 kg moisture-barrier bags, with storage kept below 30°C and 60% relative humidity.
In gypsum jointing and skim coat dry-mix production, DA-1220 is used at 1.5–2.5 wt% of the dry formulation to improve adhesion to gypsum plasterboard, increase surface cohesion, and reduce the incidence of edge cracking during drying. The binder phase is typically beta-hemihydrate gypsum with a controlled set time using chelating retarders and a calcium carbonate or talc filler; the product must meet EN 13963:2014 for jointing compounds or ASTM C475/C475M-17 in markets referencing United States specifications. Site mixing is performed with 32–38% water by dry weight using a slow-speed paddle mixer at 400–600 rpm until a lump-free, gel-like consistency is obtained; the working time is adjusted to 45–75 min through retarder dosage because the polymer does not function as a set retarder at the specified addition level. On automated dry-mix lines, hygroscopic filler and polymer powder are fed into a conical screw mixer at low speed to avoid frictional heating above 40°C, which can cause partial film formation on the powder bed surface. Amine-based accelerators or alkanolamine additives should not be dry-blended with DA-1220 without compatibility testing, because high-pH buffers can destabilize the redispersed VAE dispersion and reduce expected film continuity. Terminal products include hand-applied and machine-applied skim coats, drywall joint fillers for tapered edge joints, and gypsum-based wall putties for interior surfaces; at addition rates above 2.5 wt%, sanding quality decreases and surface tack may increase under ambient relative humidity above 70%, whereas below 1.5 wt% edge cracking and insufficient paper bonding become more likely.
In structural and non-structural concrete repair mortars, DA-1220 is incorporated at 1.5–3.5 wt% of total dry mortar to improve adhesion to prepared concrete substrates, reduce carbonation ingress, and lower the modulus of repair layers under restrained shrinkage. The compliance framework is EN 1504-3:2005; class R4 products must achieve a minimum 28-day compressive strength of 45.0 MPa and a maximum chloride content of 0.05 wt%, while class R3 requires 25.0 MPa and the same chloride threshold. The dry mix is manufactured in a twin-shaft forced-action mixer with vacuum-assisted air removal; the typical batch sequence includes CEM I 52.5 N, silica fume at 3–8 wt%, graded quartz, polycarboxylate ether superplasticizer, and DA-1220 in the final blending stage. A known production bottleneck is that addition rates above 3.5 wt% increase entrapped air content and delay the onset of measurable early strength in 20–50 mm build thicknesses, which complicates removal of formwork or finishing trowelling. Atmospheric relative humidity above 60% requires dehumidified storage and silo desiccant dryers because pre-dried polymer powder cannot be wet densified without risking premature film formation. The mixed repair mortar is applied to substrate surfaces prepared by grit blasting or scabbling to remove laitance and achieve target pull-off adhesion measured per EN 1542, commonly specified as ≥1.5 N/mm² for non-structural R3 and ≥2.0 N/mm² for structural R4 depending on the declared end-use. Published data for DA-1220-specific pull-off strengths on carbonated concrete is limited, so initial type testing on representative concrete substrates is required. Terminal products include one-component polymer-modified repair mortars for spalled concrete edges, façade restoration renders, and low-shrinkage patching mortars for concrete elements where chloride-free formulation is mandatory.
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DA-1220 is a vinyl acetate–ethylene (VAE) copolymer redispersible polymer powder produced by spray drying an aqueous VAE dispersion onto a polyvinyl alcohol protective colloid and a mineral anti-caking agent. It is supplied as a construction-grade RDP for dry-mix cementitious and gypsum formulations. Supplier certificates of analysis list a non-volatile content not less than 98% by mass after loss on drying at 105°C and a residual moisture content below 1.5%. The powder presents a bulk density of 450–600 g/L under ISO 60, a pH of 6.0–8.0 in a 10% aqueous dispersion under ISO 787-9, and an ash content of 10–14 wt% after 600°C muffle furnace exposure under ISO 3451-1. Minimum film-forming temperature is reported at 0°C under ISO 2115, while differential scanning calorimetry under ISO 11357-2 places the glass transition temperature between −15°C and +5°C depending on ethylene sequence distribution. These physical boundaries make DA-1220 applicable to C2-class ceramic tile adhesives, external thermal insulation composite systems, concrete repair mortars, self-leveling underlayments, and gypsum patching compounds.
The following ranges appear in supplier certificates of analysis for DA-1220 and should be treated as lot-specific acceptance criteria rather than universal product values.
| Property | Test method | Typical specification range |
|---|---|---|
| Appearance | Visual inspection | White free-flowing powder |
| Non-volatile content | ISO 787-2 | ≥98% by mass |
| Residue on 150 µm sieve | ISO 787-18 with ISO 565 wire cloth | ≤2% |
| Bulk density | ISO 60 | 450–600 g/L |
| pH in 10% dispersion at 20°C | ISO 787-9 | 6.0–8.0 |
| Minimum film-forming temperature | ISO 2115 | 0±2°C |
| Glass transition temperature | ISO 11357-2 | −15°C to +5°C |
| Ash content at 600°C | ISO 3451-1 | 10–14 wt% |
Particle-size control is monitoring-sensitive in production. A rise in residue on 150 µm sieve above 2% often indicates moisture ingress or partial particle agglomeration during storage. Conversely, bulk density below 450 g/L can indicate excessive air incorporation during spray drying, which alters volumetric dosing in dry-mix plants.
In a C2TE-class cementitious tile adhesive formulated to EN 12004-1:2017, DA-1220 is commonly dry-blended at 2.5–4.5 wt% of total mortar mass. The polymer modifies fresh mortar in three measurable ways: it extends open time by reducing surface moisture flux, it increases wet tape adhesion, and it lowers air content when defoamer dosage is adjusted. For porcelain tiles with water absorption below 0.5%, laboratory tensile adhesion measured under EN 1348:2007 after 28-day water immersion is typically 1.0–1.6 MPa at 3.5 wt% RDP dosage, compared with 0.4–0.7 MPa for an unmodified cement control. Heat-age tensile adhesion after 14 days at 70°C remains above 1.0 MPa only if the formulation limits cement content to 35–40 wt% and uses a sand grading with 0.1–0.3 mm median particle size. The powder should be mixed with cement and dry aggregate for 120 s before water addition at 600–800 rpm in a planetary mixer. Final mixing time should not exceed 15 min because excessive air entrainment can reduce compressive strength by 10–15% relative to a 3 min mix. At 20°C/65% RH, open time extension is typically 20–30 min beyond the unmodified control when judged by the EN 1346 skinning method.
Viscosity development after water addition follows a shear-thinning profile. At 10 rpm on a Brookfield RVDV-II+ viscometer, fresh mortar containing 3.5 wt% DA-1220 and 0.35 wt% medium-viscosity cellulose ether typically shows 400,000–600,000 mPa·s at 25°C. At 100 rpm, the same mortar drops to 80,000–120,000 mPa·s. The polymer does not substantially alter static yield stress but reduces plastic viscosity, allowing a water reduction of 0.01–0.02 without loss of trowelability. If the addition rate exceeds 5 wt%, the polyvinyl alcohol protective colloid begins to dominate rheology and may produce stringiness and prolonged mixing time.
Vinyl acetate homopolymer exhibits a glass transition temperature of approximately 28–35°C. Such powders require external coalescents or plasticizers to form a continuous film at ambient temperature. DA-1220 incorporates ethylene comonomer sequences that act as internal flexibilizing units along the polymer backbone. The ethylene segment reduces chain stiffness and lowers the glass transition temperature to −15°C to +5°C, which permits particle coalescence at 0°C without external volatile coalescents. The practical consequence is that DA-1220 forms a flexible film in thin mortar layers at application temperatures down to 5°C, while vinyl acetate homopolymer RDP often fails to coalesce below 18–25°C unless plasticizer addition exceeds 5 wt%.
| Property | DA-1220 VAE copolymer RDP | Vinyl acetate homopolymer RDP | Acrylic RDP |
|---|---|---|---|
| Glass transition temperature by ISO 11357-2 | −15°C to +5°C | 28–35°C | −30°C to +10°C |
| Minimum film-forming temperature by ISO 2115 | 0°C | 20–28°C | 0–5°C |
| 24-h water uptake of dried film by ISO 62 | 10–20% | 30–50% | <10% |
| Tensile adhesion after water immersion for porcelain tile by EN 1348 | 1.0–1.6 MPa | 0.3–0.6 MPa | 1.2–1.8 MPa |
| Typical dosage in a C2 tile adhesive under EN 12004-1 | 2.5–4.5 wt% | 3.0–5.0 wt% | 2.0–4.0 wt% |
Values in this comparison are illustrative supplier-reported ranges and require verification under identical mortar formulation. In cementitious mortar, the VAE film reduces water uptake relative to vinyl acetate homopolymer because ethylene units are hydrophobic. Long-term immersion in calcium hydroxide solution at pH 12.5 hydrolyzes vinyl acetate ester groups more rapidly than ethylene-containing sequences; therefore VAE copolymers occupy an intermediate position in alkali resistance between vinyl acetate homopolymers and acrylic polymers. The polyvinyl alcohol protective colloid remains water-sensitive and can contribute to film whitening and tensile strength loss after 7 days water immersion. For tile adhesives requiring ≥1.0 MPa after water immersion, DA-1220 is typically used at 3.0–4.0 wt%, whereas an acrylic RDP may achieve the same threshold at 2.0–3.0 wt% in some formulations. However, the VAE RDP better maintains low-temperature flexibility and is often lower in cost per unit dry mortar mass.
Production-scale dry-mix lines using twin-shaft paddle mixers of 2,000 L capacity observe that a shift from 450 g/L to 600 g/L changes volumetric feeder fill by approximately 33% at constant screw speed. Gravimetric feeders or recalibration against reference mass are required to control DA-1220 dosage within ±0.2 wt%. The powder should be added to the mixer before fine fillers and fibers, not after. Blending for 180 s at 60–80 rpm main shaft speed is typically sufficient to distribute the polymer. High shear mixing at 600–800 rpm for 180 s after water addition disperses the redispersed particles; mixing longer than 15 min can entrain air and reduce compressive strength by 10–15% relative to a 3 min mix. In pumpable self-leveling systems, the powder may lower water demand by 0.01–0.02 water/binder ratio units while also reducing mortar density by 2–5% due to entrained air. Defoamer selection should be adjusted when DA-1220 dosage exceeds 4 wt% to keep air content below 3% by volume under EN 1015-7.
Coastal production environments with uncontrolled storage show moisture increase in DA-1220 from 1.5% to 3.0% within 14 days if bags remain open. This moisture shift slows dry flow through screw conveyors and raises the residue on 150 µm screens from below 2% to 5–8%. The first process response is containment in dehumidified storage at ≤50% RH. If this is not possible, the powder should be screened through a 500 µm vibratory sieve and dried at 40°C for 120 min before metering. Exposure above 75% RH can produce irreversible particle blocking; blocked powder fails redispersion and should be discarded. Pneumatic conveying air must be dried to a dew point below −10°C to prevent rehumidification. These constraints are more severe than those for many acrylic RDPs because the polyvinyl alcohol protective colloid in VAE systems is hygroscopic. The recommended shelf life for unopened bags at 5–35°C is 12 months.
Gypsum-based self-leveling underlayments incorporate DA-1220 at 1.5–3.0 wt% of the gypsum binder to raise flexural strength and reduce surface dusting. At 2.0 wt%, flow-table spread under EN 1015-3 is typically 150–180 mm at a water/binder ratio of 0.22; addition above 3.5 wt% increases yield stress and can reduce self-leveling behavior. The powder is not optimized for calcium sulfate systems containing high levels of polycarboxylate superplasticizer; published compatibility data for that specific configuration is limited, and pilot-scale flow testing is recommended before production introduction. When the gypsum formulation includes a retarder based on protein or citric acid, the initial coagulation of DA-1220 is not significantly altered, but the final film strength can be reduced if the pH falls below 5. The material remains unsuitable for solventborne binders and for applications requiring continuous exposure to acidic media below pH 4.
