| HS Code | 143610 |
| Product Name | VA&VeoVa&Acrylate RDP |
| Chemical Family | Vinyl Acetate / Vinyl Ester of Versatic Acid / Acrylate copolymer |
| Physical Form | Redispersible powder |
| Color | White to off-white powder |
| Particle Size | Typically 5-100 microns |
| Bulk Density | Approx. 300-600 g/L |
| Solids Content | ≥ 98.0% by weight |
| Glass Transition Temperature Tg | Approx. 0 to 20°C |
| Minimum Film Formation Temperature Mfft | Approx. 0 to 10°C |
| Viscosity As 5 Dispersion | Approx. 500-5000 mPa·s |
| Ph As 5 Dispersion | Approx. 6.0-8.0 |
| Water Resistance | Excellent, with improved water repellency |
| Adhesion | Strong adhesion to cement, wood, and common substrates |
| Flexibility | High flexibility and crack resistance |
As an accredited VA&VeoVa&Acrylate RDP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | VA&VeoVa&Acrylate RDP is supplied in 25 kg multi-layer paper bags with PE liners, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with palletized, shrink-wrapped bags of VA&VeoVa&Acrylate RDP, secured and protected against moisture. |
| Shipping | VA&VeoVa&Acrylate RDP is shipped as a free-flowing white powder in 20 kg multi-layer paper bags, palletized and shrink-wrapped. Avoid moisture, heat, and direct sunlight during transit. Store in a cool, dry warehouse. Not classified as dangerous goods under standard transport regulations. |
| Storage | Store VA&VeoVa&Acrylate RDP in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture absorption and contamination. Maintain temperatures below 30°C and avoid exposure to humidity. Use within the manufacturer’s stated shelf life, rotating stock as needed. |
| Shelf Life | Shelf life is typically 12 months when stored in cool, dry conditions, avoiding moisture and direct sunlight. |
In thin-bed ceramic tile fixing, a vinyl acetate–vinyl versatate–acrylate redispersible polymer powder with a glass transition temperature band of -15 °C to 5 °C and a minimum film-forming temperature typically below 4 °C is incorporated into a cement–sand–cellulose ether dry blend. The finished adhesive is classified under ISO 13007-1:2014 and tested against the tensile adhesion requirements of EN 12004:2007+A1:2012 and EN 1348:2007. Production-scale reformulation records indicate that the powder addition window for a C2-class fully flexible adhesive is 2.5–4.5 wt% of total dry mortar, whereas a C1-class formulation commonly operates at 1.5–3.0 wt%. The lower boundary is fixed by the need to retain adhesion after 21 days water immersion and 25 freeze-thaw cycles; the upper boundary is constrained by wet-mortar tack and trowel-open-time loss when the dosage exceeds 4.5 wt%. Dry blending is executed in a twin-shaft forced-action mixer with a high-speed chopper, with the polymer powder introduced after the fine calcium carbonate and before the cellulose ether to limit electrostatic segregation. Wet mixing uses a slow-speed paddle mixer at 250–400 rpm with water demand adjusted to 24–26 wt% of dry mix; the pot life on site is 2–4 h, and the trowel open time under 23 °C/50% RH remains within 20–30 min. A recurring processing defect observed in tile mortar plants is moisture uptake from freshly milled silica sand, which, above 0.3% residual moisture, causes partial pre-redispersion and lump formation in the silo. Terminal product types include standard-setting thin-bed adhesives, extended-open-time adhesives, large-format porcelain mortars, and deformable C2S1 mortars used over heated screeds and facade tiling. The following table summarizes the typical property shift across a formulation gradient for one C2 recipe.
| Parameter | RDP at 1.5 wt% | RDP at 3.0 wt% | RDP at 4.5 wt% |
|---|---|---|---|
| Dry tensile adhesion after 28 days | 0.8–1.2 MPa | 1.5–2.0 MPa | 2.0–2.6 MPa |
| Tensile adhesion after water immersion | 0.4–0.6 MPa | 0.9–1.2 MPa | 1.2–1.6 MPa |
| Tensile adhesion after freeze-thaw cycling | 0.4–0.6 MPa | 0.8–1.1 MPa | 1.1–1.4 MPa |
| Open time adhesion at 30 minutes | 0.3–0.5 MPa | 0.6–0.8 MPa | 0.9–1.1 MPa |
External thermal insulation composite systems use the redispersible powder in two distinct dry-mix recipes: the mineral adhesive used to bond expanded polystyrene or extruded polystyrene boards to the substrate, and the glass-fibre mesh-reinforced base coat. The relevant European assessment framework is EAD 040083-00-0404, which replaced the earlier ETAG 004 guideline, and harmonized testing includes bond strength, water absorption and impact resistance. In production-scale recipes, the adhesive mortar typically carries 2.0–3.0 wt% of the VeoVa–acrylate redispersible powder, while the base coat is raised to 3.0–5.0 wt% to create sufficient film flexibility around the embedded mesh and to reduce crack propagation from thermal movement. The dry blend is mixed in a horizontal ploughshare mixer with a chopper, and the powder is added after the mineral fillers to avoid blocking of the chopper screens; the wet adhesive is produced with a low-shear paddle mixer at 250–350 rpm and a water demand of 20–23 wt%. On facade sites, application is performed by stainless steel notched trowel, the insulation board is pressed into the adhesive ribbons, and the base coat is sprayed or trowelled onto the board before the glass-fibre mesh is embedded at 1/3 of the wet base-coat thickness. A production-specific risk emerges below 5 °C: the cement continues to hydrate, but film coalescence of the dispersed polymer slows significantly, producing a surface that powders after early rain or frost. Published laboratory reports indicate that early rain exposure before the first 48 h of film formation can reduce impact resistance by 20–30% relative to 7-day cured reference panels, although the exact loss depends on wind speed and substrate absorbency. Terminal product types include EPS/XPS board adhesives, glass-fibre mesh-reinforced base coats, and one-layer mineral render primers used under silicone or silicate finishes.
In cementitious self-leveling underlayment production, the addition ratio is deliberately held at the lower side of the polymer window, typically 1.0–3.0 wt%, because excess polymer increases plastic viscosity, stabilises entrained air and retards the calcium aluminate or Portland cement reaction. The relevant floor screed standard is EN 13813:2002, which classifies strength and sound insulation properties, and in North America the applicable test method is ASTM C1708/C1708M-23. A production flow line includes continuous dry dosing into a twin-shaft paddle mixer, followed by automated water dosing, high-shear mixing at 400–600 rpm, pump transport to the application area, and de-aeration by spiked roller. The terminal poured thickness is usually 1–10 mm for cement-based underlayments and up to 25 mm for renovation screeds. Processing failures on job sites include pinhole formation when the polymer powder dosage is below 1.0 wt%, because the wet film is too brittle to bridge the small air bubbles retained in the slurry; conversely, at dosages above 3.0 wt% the slurry develops a surface crust that closes the open surface before the roller has fully released entrained air. The powder improves adhesion to concrete substrates, reduces edge curl by controlling drying shrinkage, and contributes to the smooth surface needed before vinyl, rubber or ceramic covering. Terminal product types include cementitious self-leveling underlayments, high-flow renovation screeds, and thin-section floor repair slurries.
One-component cementitious waterproofing slurries use the redispersible powder to develop crack-bridging flexibility and reduce capillary water uptake in the cured coating. The relevant product standard is EN 14891:2017, while water absorption is often evaluated by the capillary absorption coefficient method in EN 1062-3:2008. The polymer powder addition is typically 3.0–5.0 wt% of the dry mix; the higher end of this range is reserved for coatings that must bridge substrate cracks up to 0.75 mm at 23 °C. The dry blend is produced in a forced-action mixer with the powder added after fine quartz and cement but before hydrophobic additives, because early contact with calcium stearate can partially hydrophobe the polymer particles and delay redispersion. On the application side, the dry mortar is mixed with 22–27 wt% water, conditioned for 3–5 min, and applied by stiff nylon brush, steel trowel or airless spray in two coats, with total consumption of 1.2–2.0 kg/m² per coat. Processing defects observed in brush-applied membranes include pinholes when the first coat is applied over excessively absorbent concrete without substrate prewetting, and polymer film wash-out when rain falls within 4 h of application. The cured membrane must remain watertight under positive hydrostatic pressure and must maintain adhesion to concrete after water immersion, which is why dosage below 3.0 wt% is generally insufficient for flexible slurries. Terminal product types include flexible cementitious waterproofing slurries, brush-applied tanking membranes, and trowel-grade waterproofing compounds for bathrooms, balconies and water tanks.
In structural concrete repair, the powder is used in polymer-modified cementitious mortars that must comply with EN 1504-3:2005 for classes R2, R3 and R4. The addition ratio is normally 2.5–4.5 wt% of total dry mortar; R2 non-structural formulations may use the lower half, while R4 structural mortars require the upper half to maintain open time and reduce shrinkage cracking. The production process includes pre-blending of cement, graded quartz aggregate, microsilica and the redispersible powder in a twin-shaft mixer, followed by substrate prewetting and the application of a cementitious primer before trowelling or spraying. On vertical and overhead repairs, the powder increases cohesion and water retention, allowing layer thicknesses of 20–40 mm without slumping; in tunnel and bridge repair projects, field records show that the same dosage reduces rebound loss during dry-spray application compared with unmodified mortar, but published data for this specific dry-spray configuration is limited. The technical boundary is the compressive strength reduction that accompanies high polymer content: dosage above 5.0 wt% may lower the 28-day compressive strength below the R4 threshold of 45 MPa if the water demand is not reduced. Terminal product types include R2 mortars for surface fairing, R3 and R4 structural repair mortars, and hand-applied or machine-applied spall repair compounds.
Gypsum-based drying-type joint fillers and patching compounds incorporate a redispersible copolymer powder at 1.0–3.0 wt% of the dry blend to improve adhesion to plasterboard paper, glass-fibre tape and pre-painted surfaces. The relevant product specification is ASTM C475/C475M-23 in North America, while European drywall systems reference EN 13963:2014. The powder is added in a low-shear ribbon blender, and the mixed filler is hydrated with water to a trowel consistency before knife application and air drying. Production-scale defects include delayed setting when the dosage exceeds 3.0 wt%, because the polymer film inhibits water transport from the gypsum matrix; at dosages below 1.0 wt%, the dried filler develops microcracks along the tape edge after one day of drying. The powder does not participate in gypsum hydration but contributes to the cohesive film needed for sanding and finishing, particularly in low-density fillers with high perlite content. Terminal product types include drying-type joint fillers, all-purpose joint compounds, taping compounds, and fine-surface patching plasters.
For thin-bed tile grouts, polymer addition must remain low because the final joint must retain abrasion resistance and cleanability. The product standard is EN 13888:2008, which defines CG1 and CG2 classes, and the improved CG2AW designation is often targeted for exterior and wet areas. The powder dosage is generally 1.0–2.5 wt% of the dry grout mix; this range improves edge adhesion and reduces pigment bleed without causing a waxy film on the tile surface after washing. The dry production process uses a high-speed vertical mixer because the fine particle size of the grout makes segregation more likely; the polymer powder is added after the pigments and before the cellulose ether, with total mixing time limited to 6–10 min to prevent static charge accumulation. On site, the grout is mixed with a low water dosage of 18–22 wt% and forced into joints with a rubber float, then washed with a damp sponge after the initial set. A common field failure occurs when the dosage exceeds 2.5 wt%: the polymer forms a continuous surface film during the washing stage, creating a glossy smudge that is difficult to remove and lowers the abrasion resistance below the CG2 requirement. Terminal product types include fine-grained CG1 wall grouts, CG2 high-abrasion floor grouts, and water-resistant CG2AW grouts for swimming pools and exterior paving.
Competitive VA&VeoVa&Acrylate RDP prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
VA&VeoVa&Acrylate RDP is a redispersible terpolymer powder prepared by spray-drying an aqueous polymer dispersion of vinyl acetate, vinyl ester of versatic acid, and an acrylate monomer onto a protective colloid and inorganic anticaking matrix. The powder is designed for dry-mix cementitious formulations where a polymer co-binder is required to modify adhesion, flexibility, water resistance, and low-temperature film formation. Commercial grade designations commonly encode the monomer sequence and a nominal glass transition suffix; for example, a grade intended for flexible waterproofing may carry a nominal glass transition near −8°C and a minimum film-forming temperature below 0°C. The product is differentiated from conventional vinyl acetate-ethylene RDPs by the presence of the branched VeoVa ester, which restricts alkaline hydrolysis in cementitious pore solutions, while the acrylate fraction supplies chain flexibility and cold-climate coalescence without the high ethylene pressure required in vinyl acetate-ethylene manufacture.
Hydrating Portland cement generates an aqueous pore solution with a pH commonly in the range of 12.5–13.5. Under these conditions, simple ester-containing polymers such as vinyl acetate homopolymers are susceptible to hydrolysis at the ester carbonyl. In the VeoVa monomer, the ester linkage is derived from a tertiary branched monocarboxylic acid with three alkyl substituents at the α-carbon; the steric bulk of this structure limits nucleophilic attack by hydroxide ion. The acrylate monomer further disrupts chain regularity and reduces the glass transition temperature, but the hydrophobic branched side chain from VeoVa contributes lower equilibrium water uptake than many ethylene-modified grades in prolonged wet exposure. Published direct kinetic comparisons of hydrolysis rate constants for this specific terpolymer are limited, but the structure–property behaviour is documented in technical bulletins and patent literature for redispersible polymer powders. Compared with vinyl acetate-ethylene copolymers, the VA&VeoVa&Acrylate route also avoids ethylene reactor conditions and allows the comonomer sequence to be adjusted within a conventional emulsion polymerisation plant. The trade-off is generally higher raw material cost and a slightly higher minimum film-forming temperature than ethylene-rich grades, although the acrylate content can be raised to compensate for low-temperature coalescence.
Commercial grade designations in technical data sheets are not globally standardised. A suffix may indicate the nominal glass transition temperature, the protective colloid system, or the anti-caking agent type. A grade intended for flexible tile adhesives may use a polyvinyl alcohol protective colloid with a hydrolysis degree near 88% and an ash content between 8.0% and 14.0%. A grade formulated for self-leveling underlayments may carry a higher glass transition near +5°C and a reduced anti-caking agent content to limit dusting. Because the grade suffix is producer-specific, the formulator must verify the exact release specification against the certificate of analysis rather than relying on the trade name alone.
Redispersion quality is assessed by adding 50 g of powder to 50 g of deionised water in a 250 mL beaker and dispersing with a high-shear dissolver fitted with a 40 mm blade at 1000 rpm for 180 s. The resulting 50% solids dispersion is inspected for coagulum, sediment, and visual phase separation after 24 h. A redispersed particle size of 1–10 µm after controlled shear is considered acceptable for cementitious mortars; larger agglomerates indicate insufficient drying temperature, storage moisture damage, or premature crosslinking of the protective colloid. Laser diffraction equipment such as a Malvern Mastersizer 3000 is commonly used for this determination. Viscosity of the redispersion at 20°C and 20 rpm using a Brookfield LV spindle 3 typically falls between 500 mPa·s and 4000 mPa·s, depending on the polyvinyl alcohol grade and residual solids. This viscosity window directly influences dry-mix water demand: excessive redispersion viscosity can reduce open time and increase trowel drag, while overly low viscosity may indicate insufficient protective colloid and poor powder redispersibility.
| Property | Test method | Target range |
|---|---|---|
| Bulk density | ISO 60 | 450–620 g/L |
| Residue on 150 µm sieve | ISO 1624 | ≤2.0% |
| Ash content | ISO 3451-1 | 8.0–14.0% |
| pH of redispersion | ISO 976 | 6.0–8.5 |
| Minimum film-forming temperature | ISO 2115 | 0–3°C |
| Glass transition temperature | ISO 11357-2 | −12 to +5°C |
| Non-volatile solids | ISO 3251 | ≥98.0% |
Industrial spray-drying towers for this powder class operate with co-current hot-air flow and inlet temperatures of 110–170°C; outlet temperature is held between 55°C and 80°C to avoid thermal damage to the polyvinyl alcohol shell. The feed latex is usually concentrated to 45–55% solids before atomisation. In production-scale units with water evaporation capacities of 800–1200 kg/h, the powder is collected in cyclones and bag filters, then blended in homogenisation silos to control lot-to-lot variation in bulk density and sieve residue. Residual moisture content below 1.5% is a critical release parameter because the protective colloid is hygroscopic; moisture ingress above this value can reduce powder flow and promote the formation of insoluble skins.
In cementitious tile adhesives where classification C2S1 or C2S2 under ISO 13007-2 is required, the terpolymer powder is typically dosed at 3.0–5.5% of dry-mix mass. The low minimum film-forming temperature permits polymer coalescence at application temperatures near 5°C without coalescing solvents. Tensile adhesion is evaluated according to EN 1348 or ISO 13007-2 using concrete slabs and pull-off testing after water immersion, heat ageing, and freeze-thaw cycling. The powder alone does not establish the final classification; cement grade, aggregate grading, cellulose ether dosage, open time, and water/cement ratio are equally dominant variables. In open-time testing, a polymer-modified formulation can retain a wet edge for a longer interval than an unmodified control, but the quantitative result is specific to the full formulation and should be confirmed on the intended job site.
One-component cementitious waterproofing slurries formulated under EN 14891 use the powder at 4.0–8.0% of dry mix. Crack-bridging ability at −5°C is influenced by film elongation after drying and by retention of flexibility when the membrane is saturated. The VeoVa component limits swelling of the redispersed film, while the acrylate component supplies elongation. Water-permeability testing is performed on 2 mm coatings applied to concrete substrates. Laboratory slurries prepared with 5% powder addition and a water-to-powder ratio of 0.24 typically produce a continuous wet film that cures without surface skinning under standard laboratory conditions. Application is usually by brush, roller, or hopper spray; spray pressure and nozzle selection should be adjusted for the viscosity build that occurs within 10–15 min after mixing.
On production-scale twin-shaft mixers with a fill volume of 300 L, the powder is added after coarse aggregates and before fine filler to prevent over-shear. Dry mixing is run at 120 rpm for 90 s, followed by liquid introduction over 30 s and wet mixing for 120 s. This sequence disperses the powder without generating excessive local temperature. Batch-to-batch bulk density variation outside the 450–620 g/L target can shift dosing accuracy in volumetric auger systems by as much as 4%; gravimetric dosing is preferred when addition rates fall below 3.0%. The powder should not be exposed to high-shear mixing at product temperatures above 50°C, because the protective colloid may undergo partial crosslinking and reduce re-dispersibility in water.
Storage in unopened original packaging at temperatures below 30°C and relative humidity below 60% is required to maintain free-flowing properties for 12 months. If bags are left open in high-humidity environments, lump formation can occur and the powder may no longer pass the 150 µm sieve requirement. Redispersion should be performed in neutral or mildly alkaline water; direct redispersion in a strongly alkaline liquid with pH above 12.5 can prematurely swell the polymer particles and raise viscosity before the powder is combined with cement. Dry blending with strong Lewis acids or high concentrations of soluble aluminium salts is incompatible because these species can destabilise the redispersed polymer and reduce wet adhesion. The product is not recommended for use with amine-based accelerators that generate exothermic pH shifts above 13 during early mixing, as this may destabilise the protective colloid and shorten workability.
In structural repair mortars and chloride-resistant grouts conforming to EN 1504-3, the powder functions as a co-binder at 2.0–5.0% by dry mass to reduce restrained shrinkage modulus and improve tensile strain capacity. After 28 days of standard curing at 20°C and 95% relative humidity, polymer-modified mixes with a 0.40 water/cement ratio commonly retain compressive strengths of 35–55 MPa. Dynamic elastic modulus is measured by resonant frequency or pulse velocity methods; compressive strength alone is not sufficient to evaluate the flexibility benefit. In patching mortars applied by hand trowel at thicknesses of 10–40 mm, the powder reduces plastic cracking and edge feathering, but the final modulus class must be confirmed by EN 1504-3 classification testing because cement chemistry and aggregate type exert a large influence on the measured values. Published data for this specific polymer configuration combined with shrinkage-reducing admixtures is limited, so laboratory validation on the intended cement type remains necessary.
