| HS Code | 459865 |
| Appearance | White powder |
| Polymer Type | Vinyl acetate-ethylene copolymer (VAE) |
| Glass Transition Temperature Tg | 0°C |
| Minimum Film Forming Temperature | 2°C |
| Bulk Density | 500-600 kg/m³ |
| Solid Content | 99% |
| Ph 10 Aqueous Dispersion | 7-8 |
| Ash Content | 10-15% |
| Redispersibility | Excellent |
| Particle Size 100 Mesh Sieve Residue | ≤5% |
| Viscosity 10 Solution 25 C | 500-1500 mPa·s |
| Setting Time Cement Based Adhesive | 30-60 minutes |
| Adhesion Strength 28 Days | >1.0 MPa |
| Water Resistance | Good |
As an accredited Rapid-setting RDP for Tile Adhesives factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg moisture-proof kraft paper bag containing rapid-setting redispersible polymer powder for high-performance tile adhesive formulations. |
| Container Loading (20′ FCL) | Rapid-setting RDP for tile adhesives packed in 25 kg bags, palletized, loaded into 20′ FCL; approximately 10–12 metric tons per container. |
| Shipping | Rapid-setting RDP for Tile Adhesives ships as a free-flowing powder in moisture-proof, multi-layer bags with PE liners, palletized for safe handling. It must remain dry and sealed, protected from moisture, direct sunlight, and high temperatures. Not classified as dangerous goods, it requires standard freight transport with proper ventilation. |
| Storage | Store Rapid-setting RDP for Tile Adhesives in a cool, dry, well-ventilated area. Keep the original sealed packaging intact to prevent moisture absorption. Avoid direct sunlight, high temperatures, and floor contact. Under proper conditions, shelf life is typically 6–12 months from manufacture date. Use opened bags promptly. |
| Shelf Life | Store in a cool, dry place; shelf life is typically 12 months from production date when unopened. Avoid moisture. |
On calcium sulfate screeds carrying embedded hydronic heating loops, the adhesive interface is subjected to a combined demand: rapid shear development for early foot traffic and heating-ramp readiness, while restrained shrinkage at the bond line cannot be relieved by substrate suction. A rapid-setting redispersible polymer powder based on a vinyl acetate–ethylene copolymer is introduced at 2.8–4.2 wt% of total dry mortar mass. The lower boundary is set by transverse deformation; formulations below 2.2 wt% frequently fail to reach 2.5 mm deformation under EN 12002:2008 and crack when the screed undergoes thermal expansion. The upper boundary is governed by early tensile strength: at RDP addition above 4.5 wt%, the 6-hour tensile adhesion measured by EN 1348:2007 can fall below 0.5 N/mm², because the coalesced polymer phase covers cement grains and slows the aluminate reaction. Production of the dry adhesive is carried out in a horizontal ploughshare mixer with a liquid-cooled jacket maintaining product temperature below 35°C; batch time is 12–15 min and final moisture content is held below 0.3% to prevent premature powder agglomeration. The mixed powder is packed in 25 kg polyethylene-lined paper bags. At the job site, addition of 21–23 wt% water yields a pot life of 60–90 min; the mortar is applied with a 10 mm × 10 mm square-notched trowel at a 3–5 mm bed thickness. The terminal product is a C2F S1 bagged adhesive intended for large-format porcelain tiles with side lengths above 60 cm on heated anhydrite screeds. The screed residual moisture must be below 0.5% CM for anhydrite and 0.3% CM for cementitious heated screeds before tiling; heating circuits are started only after 7 days and increased by 5°C/day until reaching a maximum surface temperature of 27°C. Low-shear viscosity measured with a Brookfield RVDV-II+ viscometer at 5 rpm is typically maintained between 400,000 and 600,000 mPa·s for this segment; values below 350,000 mPa·s are associated with slippage of tiles exceeding 10 kg/m² surface mass. Batch-to-batch variance in RDP particle size distribution above 75 µm on a 200 mm sieve can reduce redispersibility and cause pinholes on the trowelled surface.
| Standard designation | Performance criterion | Required value for C2F S1 |
|---|---|---|
| EN 12004-1:2017 | Classification | C2F S1 |
| EN 1348:2007 | Tensile adhesion after 6 h under standard conditions | ≥0.5 N/mm² |
| EN 1348:2007 | Tensile adhesion after 28 days under standard conditions | ≥1.0 N/mm² |
| EN 1348:2007 | Tensile adhesion after water immersion | ≥1.0 N/mm² |
| EN 1348:2007 | Tensile adhesion after heat ageing | ≥1.0 N/mm² |
| EN 1348:2007 | Tensile adhesion after freeze–thaw cycles | ≥1.0 N/mm² |
| EN 12002:2008 | Transverse deformation | ≥2.5 mm |
Because the substrate is vitrified porcelain with near-zero suction, the dominant bond-line stress in renovation work is not substrate absorption but constrained shrinkage of the fresh mortar against a low-porosity base. A rapid-setting RDP grade is dosed at 2.0–3.2 wt% of the total dry mix; below 1.8 wt%, tensile adhesion after water exposure under EN 1348:2007 drops below 0.5 N/mm² and shrinkage-induced detachment may occur. Above 3.5 wt%, the polymer film coalesces across the non-absorbent interface and creates a slip plane before initial set, particularly on vertical panels. The formulation is classified as C1FT under EN 12004-1:2017; the F designation requires a tensile adhesion value of at least 0.5 N/mm² after 6 hours under standard conditions. Open time measured by EN 1346:2007 is declared at 30 min with residual tensile adhesion not less than 0.5 N/mm². The dry-mix production route uses a gravity-fed ribbon blender at 20–25°C product temperature; the RDP is pre-blended with 0.5–0.7 wt% methyl hydroxyethyl cellulose and 0.2–0.4 wt% lithium carbonate monohydrate accelerator before addition to the cement–sand matrix. Batch time is 8–10 min after all components are charged, and final moisture is below 0.25%. The terminal product is a 20 kg moisture-proof paper bag of fast renovation adhesive for interior wall and floor ceramic coverings over existing tiles. Job-site mixing at 600 rpm for 60 s, a 5 min slaking period, and a 30 s re-mix produce a trowelable mortar with a 30–40 min open time; an 8 mm × 8 mm notched trowel yields a consumption of 2.5–3.0 kg/m². The grouting window opens at 4–6 hours for wall installations and at 6–8 hours for floor installations at 23°C.
On cement-bonded particle board and exterior cementitious boards in ventilated rainscreen facades, the adhesive layer must tolerate differential movement between tile and board while resisting repeated water ingress and UV-driven thermal stress. Rapid-setting RDP is incorporated at 4.0–5.5 wt% of total dry mortar mass. The high dosage is required to achieve deformability class S1 under EN 12002:2008 on a substrate with low water absorption and high thermal movement; below 3.5 wt%, transverse deformation typically falls below 2.5 mm and bond-line cracking appears at movement joints. The upper boundary of 5.5 wt% is set by the early-strength requirement: above this level, the 6-hour tensile adhesion under EN 1348:2007 may not reach 0.5 N/mm² in cold weather, and thixotropic class T vertical slip increases. The dry adhesive is produced in a twin-shaft paddle mixer with high-speed choppers at 120–150 rpm; mixing time after RDP addition is 15 min, with cooling to below 30°C. Final powder moisture is held below 0.2% because cement-bonded particle board applications often store bags in unheated site containers. The terminal product is a 25 kg bagged adhesive classified as C2FTE S1 under EN 12004-1:2017, intended for porcelain slabs up to 120 cm × 120 cm on exterior balconies and facades. At application, 21–24 wt% water is added; the mortar is applied with a 10 mm notched trowel over a prepared, primed board; movement joints are placed at 3–5 m intervals in both directions. Wind-load resistance is a system-level property evaluated under ETAG 034 for mechanically fastened external wall claddings; the adhesive itself is not classified for wind load under EN 12004-1. The RDP must be a low-MFFT grade with a glass transition temperature between 0°C and 8°C to maintain film flexibility after freeze–thaw cycles.
In shower basins, wet rooms, and swimming-pool surrounds over liquid-applied waterproofing membranes conforming to EN 14891:2017, the tile adhesive is exposed to continuous water immersion on one face and an impermeable membrane on the reverse. The rapid-setting RDP dosage is set at 2.5–3.8 wt% of the dry mortar. At this level, the polymer film reduces capillary water penetration without creating a continuous layer that would slow the early hydration of the calcium aluminate cement component. The cementitious binder typically contains 5–15 wt% calcium aluminate cement and 30–40 wt% ordinary Portland cement, with 0.1–0.3 wt% lithium carbonate accelerator; the RDP is selected for low air entrainment, and a defoamer is required when the RDP dosage exceeds 3.5 wt% to prevent pinholing after immersion. The formulation is designed for C2F classification under EN 12004-1:2017, with 6-hour tensile adhesion under EN 1348:2007 of at least 0.5 N/mm² and 28-day water-immersion adhesion of at least 1.0 N/mm². Dry production is carried out in a low-shear forced-action mixer at 20–25°C; batch time is 10–12 min, and final moisture is below 0.25%. The terminal product is a 25 kg polyethylene-lined bag of rapid-setting adhesive for glass mosaic, ceramic, and porcelain in wet areas, available in grey and white. At the job site, the mortar is mixed with 21–23 wt% water; water demand increases by 0.5–1.0 wt% for every 1.0 wt% RDP added, and final consistency is adjusted to a flow diameter of 150–160 mm under the flow-table method. The adhesive is applied at a 3–4 mm bed thickness over the membrane, and grouting is permitted at 4–6 hours for glass mosaic and 6–8 hours for porcelain. The operational boundary is the membrane curing window; the adhesive must not be applied before the membrane has reached its specified minimum curing time, typically 24 hours for cementitious and 72 hours for epoxies at 20°C and 65% RH.
Steam cleaning, lactic acid spillage, and forklift point loads in food and beverage wet production areas exceed the performance envelope of early-generation C1 adhesives. Rapid-setting RDP is incorporated at 3.2–4.6 wt% of total dry mortar mass. The upper bound is dictated by early strength after 6 hours; above 5.0 wt%, the adhesive may not meet the 0.5 N/mm² threshold under EN 1348:2007 when slabs are exposed to cold substrate conditions. The lower bound is set by water-immersion adhesion: below 2.8 wt%, the 28-day tensile adhesion after water immersion under EN 1348:2007 can fall below 1.0 N/mm² in steam-cleaned joints. The product is classified as C2F S1 under EN 12004-1:2017. Dry production uses a continuous twin-shaft mixer with an inline moisture sensor; the RDP is fed separately from the cement and sand to prevent shear-induced agglomeration, and the blended material is cooled to below 30°C before packaging. Final moisture is held below 0.2%. The terminal product is a 25 kg bag of rapid-setting adhesive for quarry tile and porcelain paving in breweries, dairies, and commercial kitchens. At application, solid-bed coverage of 100% is required for wet zones; the mortar is mixed at 600 rpm for 60 s, slaked for 5 min, and applied with a 10 mm × 10 mm notched trowel. Chemical resistance is primarily a tile-surface property evaluated by ISO 10545-13; the adhesive itself is not classified for chemical resistance under EN 12004-1, and published data for specific organic acid exposure of this configuration is limited.
Over polished or power-trowelled concrete in airport concourses and retail atria, residual construction moisture and surface laitance create a moisture-vapour and bond-breaker risk. A rapid-setting RDP is dosed at 2.0–3.5 wt% of dry mortar. This range preserves the 6-hour early strength required for F classification while reducing internal stress in high-traffic areas; above 4.0 wt%, early compressive strength development measured on modified cubes can be delayed sufficiently to postpone grouting beyond the 8-hour shift. The formulation is classified as C2F under EN 12004-1:2017. Substrate preparation is governed by ASTM F2170-19 for internal relative humidity, with a maximum accepted value of 75% RH, and surface moisture vapour emission is checked according to ASTM F710-22 before tiling. The dry mortar production process uses a horizontal high-speed mixer with cooling jacket at 25°C; batch time is 12 min, final moisture below 0.3%, and the product is packed in 20 kg polyethylene-lined bags. The terminal product is a fast-setting C2F adhesive for porcelain tiles in high-traffic commercial concourses. At the job site, the polished concrete is shot-blasted to remove laitance and vacuumed, followed by application of a primer compatible with the residual moisture condition. The mortar is mixed with 21–22 wt% water, applied with a 10 mm notched trowel, and the tile is bedded by vibration compaction for large-format units. Grouting is permitted at 6–8 hours under 23°C and 50% RH; below 10°C the grouting window extends beyond 12 hours.
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A carboxylated vinyl acetate-ethylene redispersible polymer powder for rapid-setting cementitious tile adhesives is supplied as a spray-dried free-flowing powder with a residual moisture below 1.0%, ash content between 9% and 12%, bulk density of 450–600 g/L, and a dispersion pH of 6.0–8.0 at 25% solids. The product is formulated for C2F adhesive systems conforming to EN 12004-1:2017, in which early tensile adhesion after 6 h must exceed 0.5 N/mm² and standard-condition tensile adhesion must exceed 1.0 N/mm². In production-scale dry-mix lines, the powder is combined with ordinary Portland cement, calcium aluminate cement, graded quartz sand, methyl hydroxyethyl cellulose, and lithium carbonate accelerator at a total polymer dosage of 2.5–4.5 wt% on dry mortar.
The rapid-setting distinction is not provided by direct chemical acceleration of cement hydration. The powder is engineered with a comparatively low minimum film formation temperature, generally 0–3 °C, and a glass transition temperature between -12 °C and -6 °C. These thermal parameters allow latex particle coalescence in the dense, high-pH pore water generated by calcium aluminate/ordinary Portland cement blends. The dry-powder particle size distribution is typically bimodal, with a main mode at 80–120 µm and a fines tail below 20 µm; the fines account for the largest fraction of true redispersible material, while larger granules serve as carriers for anti-caking agents. Redispersion is commonly assessed by sieve residue after mechanical agitation in water at 20 °C, with a residue below 0.5% on a 250 µm sieve and below 5% on a 45 µm sieve for a lot accepted for thin-bed tile fixing.
Early hydration in C2F formulations containing 5–15% calcium aluminate cement raises pore-water pH above 12.5 within 10–20 min of wet mixing. Under these conditions a conventional VAE powder with an MFFT above 4 °C may fail to coalesce into a continuous film inside the densifying pore network, leaving interfacial voids at the tile-adhesive boundary. The rapid-setting grade is designed with a lower MFFT and higher ethylene content, so capillary pressure can deform polymer particles at the water-air interface before aluminate hydrates occlude the available free water. This is particularly significant in polished porcelain applications where the adhesive must fill superficial recesses smaller than 10 µm and maintain stress transfer without relying solely on cementitious interlock.
In twin-shaft compulsory mixers of 500–1000 kg batch capacity, the powder is dry-blended with cement, calcium aluminate cement, sand, and methylcellulose for 120 s before water addition. Wet mixing at 700–900 rpm for 90–150 s can raise paste temperature to 38–42 °C, which is above the MFFT and accelerates film formation. If mixing continues beyond 240 s, air entrainment can exceed 6%, reducing water-immersion tensile adhesion under EN 1348 to below 0.9 N/mm². This operational boundary requires batch-time control and, in hot climates, the use of chilled mixing water to keep discharged mortar below 35 °C.
| Parameter | Conventional VAE RDP | Rapid-setting VAE RDP | Test basis |
|---|---|---|---|
| Ash content | 10–13% | 9–12% | ISO 3451-1 |
| Bulk density | 450–600 g/L | 430–580 g/L | EN ISO 60 |
| Minimum film formation temperature | 4–6 °C | 0–3 °C | DIN 53787 |
| Glass transition temperature | -5 to +5 °C | -12 to -6 °C | DSC, second heating |
| Early tensile adhesion after 6 h | 0.2–0.5 N/mm² | 0.6–1.1 N/mm² | EN 12004-1:2017, EN 1348 |
| Tensile adhesion after water immersion | 0.8–1.2 N/mm² | 1.0–1.5 N/mm² | EN 12004-1:2017, EN 1348 |
| Open time at 20 °C | 20–30 min | 15–25 min | EN 1346 |
Acceleration response in C2F adhesives is governed mainly by the sulphate balance of the calcium aluminate system and by lithium carbonate dosage. When the RDP is substituted into a dry mortar containing 32–40 wt% ordinary Portland cement, 8–12 wt% calcium aluminate cement, and 0.5–1.0 wt% lithium carbonate, the initial Vicat set time at 20 °C typically falls to 35–55 min. Increasing the RDP dosage from 2.0 wt% to 4.5 wt% can extend initial set by 15–25 min because polymer adsorption on C3A and C12A7 surfaces deposits a temporary barrier layer. The rapid-setting grade reduces this retardation through lower hydrophilic colloid content and higher carboxylation density, which shifts adsorption toward a thinner and less persistent layer.
For a C2F formulation evaluated under EN 12004-1:2017, six-hour early tensile adhesion is a mandatory threshold rather than a generalized performance indicator. Commercial technical data sheets cite early values of 0.6–1.1 N/mm² for rapid-setting VAE grades at 2.5–3.5 wt% addition, compared with 0.3–0.5 N/mm² for standard VAE grades in the same base mortar. These values refer to conditioning at 23 °C and 50% RH. At 10 °C, six-hour strength drops by 30–50% unless the lithium carbonate dosage is moved toward the upper end of the stated range and the mixing water is pre-warmed to 15–20 °C.
Performance loss above 5.0 wt% RDP in rapid-setting adhesives is not caused by the polymer film itself, but by the interaction between vinyl acetate hydrolysis products and ettringite formation. Vinyl acetate groups undergo partial alkaline hydrolysis during the first 24 h, releasing acetate ions that complex calcium ions and reduce the supersaturation of ettringite. At 5.0–6.5 wt% RDP in a C2F formulation, scanning electron microscopy reveals delayed ettringite needles with lower aspect ratios, and the six-hour tensile adhesion measured under EN 1348 frequently falls below 0.5 N/mm². The rapid-setting grade is therefore formulated with a lower vinyl acetate molar fraction or with terpolymer protection that limits alkaline hydrolysis to below 15% of acetate groups within 6 h.
Substituting 1.0–1.5 wt% of the rapid-setting VAE with a styrene-butadiene redispersible powder can restore early cohesion, but it increases fresh-mortar viscosity and reduces wetting on porcelain tile with water absorption below 0.5%. A more stable boundary for high-porosity porcelain is to maintain total polymer at 3.0–4.0 wt% and increase water demand to 24–26 wt%, rather than exceed 5.0 wt%. At this dosage, fresh-mortar yield stress is typically 1.2–2.0 kPa, and flow-table spread after 15 jolts is 145–165 mm under ISO 13007-1:2014 conditions.
Stored in original multi-wall bags at 20–30 °C and relative humidity below 60%, the rapid-setting VAE RDP retains redispersibility for 12 months. If storage exceeds 30 °C, the polyvinyl alcohol colloid can undergo partial crosslinking with residual aldehyde species, raising the particle core softening point and increasing sieve residue on a 315 µm mesh. Production trials with bags exposed to 70% RH for 48 h showed a 15–25% reduction in wet tensile adhesion after water immersion, while dry adhesion remained within specification. The powder should not be pre-wet or left in open hoppers above high-humidity conveying lines.
The rapid-setting RDP modifies open time through two competing mechanisms: the latex film restricts evaporative water loss from the paste surface, while the carboxylated polymer increases paste cohesion and slows surface water release. In a fully formulated C2FT adhesive with 2.8 wt% RDP, open time measured as tensile adhesion after 20 min on a concrete substrate under EN 1346 remains above 0.5 N/mm² at 20 °C and 50% RH. At 30 min, adhesion decreases to 0.3–0.5 N/mm², which indicates that rapid-setting products are optimized for short correction intervals rather than extended working times.
Vertical slip resistance tested on 150 mm × 150 mm unglazed porcelain with a 5 kg load is typically below 0.5 mm when the RDP dosage is 2.5–3.5 wt%. Above this dosage, the polymer film reduces internal friction, and the same formulation can exceed 1.5 mm of slip unless methyl hydroxyethyl cellulose is introduced at 0.2–0.4 wt%. The carboxylation and PVA colloid content also affect shear adhesion to dust-contaminated tile backs; field fabrication with controlled dust deposition has demonstrated that a 0.1 mm dust layer lowers shear adhesion by 20–35% compared with cleaned surfaces, regardless of polymer type.
| Standard | Test method | Requirement | Typical result with 3.0 wt% rapid-setting RDP |
|---|---|---|---|
| EN 12004-1:2017 | EN 1348 | Initial tensile adhesion ≥ 1.0 N/mm² | 1.2–1.6 N/mm² |
| EN 12004-1:2017 | EN 1348 | Early tensile adhesion after 6 h ≥ 0.5 N/mm² | 0.6–1.0 N/mm² |
| EN 12004-1:2017 | EN 1348 | Tensile adhesion after water immersion ≥ 1.0 N/mm² | 1.1–1.4 N/mm² |
| EN 12004-1:2017 | EN 1348 | Tensile adhesion after freeze-thaw cycles ≥ 1.0 N/mm² | 1.0–1.3 N/mm² |
| EN 12004-1:2017 | EN 1346 | Open time after 20 min ≥ 0.5 N/mm² | 0.7–1.0 N/mm² |
| EN 1308 | Slip | ≤ 0.5 mm | 0.2–0.4 mm |
Redispersion performance is quantified by the quantity of residue remaining after mechanical agitation in water. A rapid-setting VAE RDP suitable for thin-bed fixing should pass through a 250 µm sieve with residue below 0.5% and through a 45 µm sieve with residue below 5%. Coarser fractions increase the risk of pinholing in glass-tile applications and reduce film continuity at the interface. The powder particle size distribution is typically bimodal, with the larger granules acting as carriers for anti-caking agents and the sub-20 µm fines controlling the initial redispersion rate.
Unlike standard VAE RDP, the rapid-setting grade may contain an internal plasticizer or terpolymer soft segment that lowers MFFT without relying on external coalescing solvents. This is critical in C2F adhesives because volatile coalescents can transiently plasticize the cement paste and slow ettringite bridging. Solvent-free rapid-setting grades are therefore preferred in enclosed areas with ventilation constraints and indoor air quality criteria under national VOC evaluation schemes.
Below 10 °C substrate temperature, the film formation window narrows because both cement hydration and polymer particle deformation slow. The rapid-setting RDP retains its advantage only if the formulation’s calcium aluminate cement content remains above 8 wt% and the mixing water is conditioned to 15–20 °C. Field records from winter installations show that at 5 °C ambient and 40% RH, a C2F adhesive with 3.0 wt% rapid-setting VAE RDP and 0.6 wt% lithium carbonate reaches 0.5 N/mm² early adhesion in 8–10 h, whereas the same formulation with conventional VAE RDP requires 14–16 h. Data scatter is large because low-temperature curing shifts the cementitious matrix toward metastable C4AH13 phases, and the polymer film remains partially coalesced until the mortar reaches 20 °C for at least 24 h.
For porcelain tiles with water absorption below 0.5%, interface performance is more sensitive to polymer film continuity than to bulk mortar strength. In pull-off tests conducted after 7 days at 5 °C followed by 20 days at 23 °C, the rapid-setting VAE grade produced type 1 failure within the adhesive layer at 1.1–1.4 N/mm², while type 2 failure at the tile-adhesive interface dominated for non-rapid-setting powders. No practical benefit is observed when the powder is stored at low temperature and added directly to mixing water below 10 °C; it should be conditioned to 18–25 °C before dry blending.
Rapid-setting VAE RDP is incompatible with high levels of amine-based curing agents and strong acidic retarders, although these are uncommon in cementitious tile adhesives. The more relevant boundary is calcium chloride: at 2.0 wt% CaCl₂ addition, the combined accelerator effect can reduce final set to 20–30 min, but chloride ion mobility lowers polymer film water resistance and increases efflorescence risk. Therefore, the rapid-setting RDP is normally qualified in calcium aluminate/lithium carbonate systems rather than chloride-accelerated systems. Manufacturers’ technical data sheets also caution against blending the powder with premixed wet dispersions or foaming agents before dry mixing, because premature film formation reduces the redispersible fraction and creates coarse agglomerates that survive normal mixing.
