| HS Code | 875462 |
| Product Type | Vinyl acetate-acrylate copolymer emulsion |
| Appearance | Milky white liquid |
| Solid Content | 55 ± 1% |
| Viscosity | 1000-2500 mPa·s at 25°C |
| Ph | 7.0-8.5 |
| Particle Size | 0.2-0.5 μm |
| Glass Transition Temperature | approx. -10°C |
| Minimum Film Forming Temperature | approx. 0°C |
| Residual Monomer Content | <0.1% |
| Density | 1.05-1.10 g/cm³ at 25°C |
| Storage Stability | Stable for 6 months at 5-35°C, protect from frost |
| Cement Compatibility | Excellent, low coagulation with Portland cement |
| Water Resistance | Improved water resistance in cured mortar films |
| Tensile Adhesion Strength | ≥0.6 MPa for modified mortar after 28 days |
| Elongation At Break | ≥300% for polymer film |
As an accredited VAc-Acrylate Emulsion for Dry-mix Mortar Modification factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 200 kg drums or 1,000 kg IBC totes, tightly sealed to prevent skinning and contamination. |
| Container Loading (20′ FCL) | 20′ FCL of VAc-acrylate emulsion for dry-mix mortar modification, loaded in drums/IBCs, safely secured for transit. |
| Shipping | The product ships in sealed HDPE drums or IBC totes, protected from freezing, heat, and direct sunlight. Standard road, rail, or container sea freight is suitable. Ensure secure upright loading, adequate ventilation, and spill containment. Avoid temperatures below 5°C to maintain emulsion stability during transit. |
| Storage | Store VAc-acrylate emulsion in sealed, original containers in a cool, dry, well-ventilated area away from direct sunlight and frost. Maintain temperatures between 5°C and 30°C; avoid freezing and excessive heat. Keep away from strong oxidizers and ignition sources. Under proper conditions, shelf life is typically 6–12 months. Stir gently before use. |
| Shelf Life | Shelf life: 6 months from production date when stored unopened in a cool, dry place; avoid freezing. |
Mortar formulations targeting C2S1 classification for large-format porcelain tiles typically incorporate a spray-dried VAc-acrylate copolymer powder at 2.8 wt% to 5.0 wt% of total dry-mix mass. The upstream emulsion is synthesized with a vinyl acetate-to-butyl acrylate ratio that yields a glass transition temperature between 0 °C and 12 °C, then stabilized with polyvinyl alcohol at 8–12 wt% before spray drying in a co-current tower at inlet air 140–170 °C and outlet air 65–80 °C. Over-drying above 180 °C reduces redispersibility and produces grit that cannot coalesce into a continuous film after mixing. Dry-mix blending uses a horizontal paddle mixer with CEM I 52.5R, silica sand 0.1–0.6 mm, cellulose ether at 0.3–0.5 wt%, calcium formate at 0.5–1.0 wt%, and the spray-dried polymer powder; total mixing time is 120–180 s, with batch homogeneity confirmed by loss-on-ignition rather than bulk density alone. The relevant compliance framework is EN 12004-1:2017 and ISO 13007-2:2016, with tensile adhesion measured according to EN 1348:2007 after standard curing, water immersion, heat ageing at 70 °C, and 25 freeze-thaw cycles. A C1 adhesive must retain ≥0.5 N/mm²; C2 classification requires ≥1.0 N/mm² under each exposure. Deformability S1 and S2 are determined by transverse deformation of ≥2.5 mm and ≥5.0 mm respectively.
| Classification | Test method and condition | Minimum requirement |
|---|---|---|
| C1 | EN 1348:2007; 28 d standard, water, heat ageing, freeze-thaw | ≥0.5 N/mm² |
| C2 | EN 1348:2007; 28 d standard, water, heat ageing, freeze-thaw | ≥1.0 N/mm² |
| S1 | EN 12004-2:2017; transverse deformation | ≥2.5 mm |
| S2 | EN 12004-2:2017; transverse deformation | ≥5.0 mm |
At the job site, one-component dry mix is gauged with water at 0.20–0.25 water-to-powder ratio and mixed with a slow-speed drill paddle at 400–600 rpm. The VAc-acrylate film forms after cement hydration begins, bridging microcracks at the tile–mortar interface and accommodating shear stress from large-format porcelain. Terminal finished product types include C2S1 and C2S2 thin-bed adhesives for low-absorption porcelain, glass mosaic, and large-format ceramic panels. Addition outside the 2.8–5.0 wt% window increases air entrainment and can delay cement hydration beyond 24 h initial set, particularly when combined with retarded cellulose ether at the upper limit.
In two-component cementitious waterproofing slurries, the limiting parameter after film cure is crack-bridging at the hydration-stressed membrane–substrate interface, not initial tensile pull-off. EN 14891:2017 and JC/T 984-2011 define crack-bridging tests at 0.75 mm and 1.5 mm crack widths under 0.3 MPa hydrostatic pressure, with tensile adhesion after water contact ≥0.5 N/mm². The liquid component is a VAc-acrylate emulsion adjusted to pH 7.0–8.5 and blended at a liquid-to-powder ratio of 0.30:1 to 0.38:1 by mass. At an emulsion solids content of 50%, this corresponds to polymer solids on cement of 0.12:1 to 0.18:1, which is the working range where the cured membrane retains elongation without losing compressive strength below 12 MPa at 28 days.
Production-scale mixing uses a forced-action paddle mixer at 300–600 rpm; the slurry is mixed for 3–5 minutes and then applied by brush or notched trowel in two passes to a total dry-film thickness of 1.2–2.0 mm. Pot life at 20 °C is typically 45–60 minutes; higher emulsion dosage shortens gelation only slightly because the vinyl acetate-acrylate backbone is alkaline-stable but not immune to calcium-induced coagulation if the emulsion is added directly to dry cement without prior dilution. Amine-based additives and high-calcium chloride accelerators above 2.0 wt% should be excluded to avoid premature destabilization. Terminal finished product types include flexible cementitious waterproofing membranes for under-tile wet rooms, balcony floors, and below-grade external tanking.
ETICS base coat/adhesive compounds for expanded polystyrene boards require low capillary water absorption and residual adhesion after hygrothermal cycling. The addition of spray-dried VAc-acrylate powder at 2.5 wt% to 4.0 wt% of the dry base-coat formulation reduces 24-hour capillary water absorption to ≤0.5 kg/(m²·h0.5) when tested according to EN 1015-18:2004. Conformity is assessed under EAD 040083-00-0404 as the replacement for ETAG 004:2013, with minimum tensile adhesion to expanded polystyrene of ≥0.08 MPa and to concrete of ≥0.25 MPa. The dry-mix process combines CEM I 42.5R, limestone filler 0–0.3 mm, cellulose ether at 0.15–0.25 wt%, and the VAc-acrylate powder in a twin-shaft compulsory mixer for 120–150 s.
On the construction line, the base coat is applied at 3–5 mm wet thickness with a 10 mm notched trowel and the glass-fiber mesh is embedded in the lower third of the layer. Film coalescence proceeds at 23 °C and 50% RH over 7 days, after which the mortar reaches its design tensile strength. Mixing water above 0.22 water-to-powder ratio causes sagging and mesh read-through; mixing water below 0.19 reduces open time to less than 10 minutes. Terminal finished product types include base coats and adhesive compounds for EPS and XPS external thermal insulation composite systems, including those with mineral wool lamella boards where higher water vapor permeability is required.
Flow retention in pump-applied self-leveling underlayment is governed by the interaction between VAc-acrylate coalescing solids and the calcium sulfoaluminate–anhydrite binder system. The polymer powder is added at 1.5 wt% to 3.5 wt% of the dry mix, and the water-to-powder ratio is controlled between 0.20 and 0.25. A flow-spread ring test according to EN 12706:1999 should remain at 250–300 mm after 20 minutes for continuous pump application; unmodified reference mixes can drop below 220 mm within the same period. The VAc-acrylate polymer with Tg near 5 °C increases plastic viscosity by approximately 15–25% at 50 rpm Brookfield spindle speed, but the effect is shear-dependent and does not prevent discharge through a 25 mm rotor-stator continuous mixer.
Compliance for cementitious self-leveling screeds is evaluated under EN 13813:2002, with typical classification CT-C25-F6 requiring compressive strength ≥25 MPa and flexural strength ≥6 MPa after 28 days. Production dry blending uses CEM I 42.5R, calcium sulfoaluminate clinker at 5–10 wt%, anhydrite, limestone powder, melamine-based superplasticizer at 0.2–0.5 wt%, and the VAc-acrylate powder. At the job site, the dry mix is delivered through a continuous mixer pump at 300–500 L/h and laid at 3–10 mm thickness. Terminal finished product types include pump-applied self-leveling underlayments for subsequent vinyl, rubber, and ceramic tile floor coverings.
The spray-drying route converts VAc-acrylate emulsion into a redispersible powder that is blended into concrete repair mortar formulations at 3.0 wt% to 5.0 wt% of total dry mix. The resulting polymer-cement co-matrix is evaluated under EN 1504-3:2005 for structural and non-structural repair. The table below lists the principal R3 and R4 mechanical and chemical requirements used during batch release.
| Property | R3 requirement | R4 requirement |
|---|---|---|
| 28-day compressive strength, EN 12190 | ≥25 MPa | ≥45 MPa |
| Chloride ion content, EN 1015-17 | ≤0.05% | ≤0.05% |
| Adhesive bond by pull-off, EN 1542 | ≥1.5 MPa | ≥2.0 MPa |
Dry-mix production at industrial scale uses a vertical cone mixer or horizontal ploughshare mixer at 180–240 s. The powder is then site-mixed with 0.13–0.16 water-to-powder ratio and applied by trowel or wet-spray at thickness from 5 mm to 40 mm depending on class and section depth. The VAc-acrylate powder improves adhesion to prepared concrete substrates but is not a substitute for surface profiling; substrate tensile strength must be at least 1.5 MPa for R3 and 2.0 MPa for R4 repairs. Application below 5 °C interrupts coalescence and leaves a weak film; substrate relative humidity above 60% does not require pre-drying, but standing water must be removed. Terminal finished product types include R3 non-structural repair mortars for edge spalls and R4 structural repair mortars for load-bearing concrete sections.
Cementitious grouts for porcelain and quarry tile joints rely on VAc-acrylate powder to reduce water absorption and improve flexural strength within narrow joint geometry. The powder is dry-blended at 1.5 wt% to 3.0 wt% of the total formulation. Under EN 13888:2009, CG2-water classification requires water absorption ≤5% at 30 minutes and ≤10% at 240 minutes, while the ar class adds abrasion resistance ≤1000 mm³. Production dry blending uses CEM I 52.5R white or grey cement, quartz filler 0.1–0.3 mm, limestone powder, and iron oxide pigments, mixed in a horizontal batch mixer for 90–150 s.
Field mixing uses 0.25–0.30 water-to-powder ratio to produce a paste that is worked into joints of 1–6 mm width with a rubber float. The VAc-acrylate film reduces surface porosity and pigment migration, but excess air entrainment lowers abrasion resistance and must be controlled by screen selection and mixing paddle speed below 500 rpm. Terminal finished product types include pigmented cementitious tile grouts for internal and external porcelain, quarry tile, and glass tile installations.
Interior and exterior high-build skim coats based on cement-lime binders use VAc-acrylate powder at 2.0 wt% to 4.0 wt% of dry mix to control plastic shrinkage cracking and improve banding resistance over absorbent substrates. Compliance is assessed under EN 998-1:2016 for rendering and plastering mortar, with capillary water absorption class Wc 1 or Wc 2 depending on exposure; water vapor permeability is reported as μ ≤ 15 for vapour-permeable finishes. Production dry blending uses CEM I 42.5R or CEM II/A-LL, hydrated lime at 5–10 wt%, calcium carbonate filler 0–0.2 mm, air-entraining agent, and the polymer powder in a ploughshare mixer for 120–180 s.
Application is performed by trowel in lifts up to 5 mm per coat, with a water-to-powder ratio of 0.18–0.22. The VAc-acrylate coalesces into a film at the air–mortar interface and at aggregate boundaries, reducing dusting and improving paint adhesion. The mortar should not be applied at relative humidity above 85% or below 5 °C; direct contact with strongly acidic substrates should be avoided because the anionic emulsion may coagulate. Terminal finished product types include high-build skim coats and patching compounds for interior walls, ceilings, and exterior render leveling before decorative coatings.
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An aqueous vinyl acetate-acrylate copolymer dispersion with a nominal solids content of 50 ± 2 wt%—supplied under the product name VAc-Acrylate Emulsion for Dry-mix Mortar Modification—functions as a film-forming modifier for cementitious dry-mix mortars when dosed either as a gauging-water replacement in two-component systems or as the base latex for spray-dried redispersible polymer powder. The polymer design combines vinyl acetate units for adhesion to hydrated cement phases with acrylate ester co-monomers, commonly butyl acrylate or methyl methacrylate, to shift the glass transition temperature and minimum film formation temperature into the range required for thin-bed tile adhesives, patching compounds, and repair mortars. The emulsion is colloid-stabilized, with typical pH 4.0–6.0 by ISO 976, Brookfield viscosity 500–2000 mPa·s by ISO 2555 at 20 °C and 20 rpm, and average particle size 150–300 nm by dynamic light scattering. Residual vinyl acetate monomer is normally held below 1000 ppm by gas chromatography, which reduces odor and flash-rust interactions on embedded steel. In dry-mix practice, liquid emulsion addition at 5–10 wt% polymer solids on cement changes both fresh-state rheology and hardened-state adhesion. The polymer particles coalesce during cement hydration as free water is consumed, forming continuous films that bridge microcracks and improve flexural strength and adhesion. Because the emulsion is aqueous, its contribution to total mix water must be calculated; failure to correct batch water in a 2,000 kg twin-shaft compulsory mixer can shift mortar consistency from plastic to flowable with less than 1 wt% water variation.
During batch release, acceptance limits are verified per shipment. The solids content determined by ISO 3251 (1 g sample, 105 °C, 3 h) is 48–52 wt%, with batch-to-batch variation of ± 0.5 wt% in extended production campaigns. pH is kept at 4.0–6.0 by ISO 976; excursions above 6.0 indicate partial neutralization or microbial degradation. Viscosity measured by ISO 2555 using a Brookfield RVT spindle 3 at 20 rpm and 23 °C falls between 500 mPa·s and 2000 mPa·s. A wider range is acceptable if the stabilizer package is adjusted, but values below 300 mPa·s can indicate shear-induced coagulation or insufficient thickening, while values above 3000 mPa·s may produce poor dispersibility in high-shear dry-mix blending.
| Property | Test method | Typical acceptance range |
|---|---|---|
| Solids content | ISO 3251 | 48–52 wt% |
| pH | ISO 976 | 4.0–6.0 |
| Brookfield viscosity | ISO 2555 | 500–2000 mPa·s |
| Minimum film formation temperature | ISO 2115 | 5–12 °C |
| Glass transition temperature | ISO 11357-2 | -5 to +10 °C |
| Average particle size | ISO 22412 | 150–300 nm |
| Residual vinyl acetate monomer | GC-FID | <1000 ppm |
Mechanical stability is relevant because the emulsion may be injected into the high-shear zone of a continuous mixer or added directly to dry powder before water. The product withstands 10 min of high-shear mixing at 6,000 rpm in a laboratory disperser without visible coagulation; however, prolonged high-shear exposure above 30 min can create microfoam that persists in the mortar and reduces compressive strength by 5–15% when air content exceeds 3 vol%. Storage in sealed totes at 5–30 °C gives a minimum shelf life of 6 months; bulk tanks require slow agitation at 20–30 rpm to avoid skinning and sedimentation. Freeze-thaw stability is not guaranteed below 0 °C; coagulation can occur after one cycle from -5 °C to 25 °C, and thawed material must be re-homogenized and sieved through a 250 µm screen before use.
In thin-bed ceramic tile adhesives formulated to EN 12004-2 class C1 or C2, the emulsion is introduced at 5–10 wt% polymer solids on cement and mixed with a 2,000 kg twin-shaft compulsory mixer at 15–18% total water demand. Open time measured by EN 1348 increases because coalesced polymer films reduce skin formation at the adhesive-air interface; values of 30–40 min open time are attainable at 23 °C and 50% RH when the formulation contains 0.3–0.5 wt% cellulose ether. Wet adhesion after 7-day water immersion improves relative to unmodified mortar from below 0.5 N/mm² to above 1.0 N/mm², but the exact value depends on cement content and substrate absorption. For gauging water replacement, every 1 kg of emulsion at 50 wt% solids contributes 0.5 kg water; ignoring this contribution in a 25 kg bag mix increases slump by 15–25 mm and reduces final compressive strength by 10–20%. In dry-mix lines where the emulsion is sprayed onto powder in a twin-shaft mixer, droplet size should be 100–300 µm to avoid local over-wetting that blocks screens in the discharge hopper.
Portland cement pore solution maintains a pH above 13.0 during early hydration. Vinyl acetate segments in the copolymer are susceptible to alkaline hydrolysis, releasing acetic acid and degrading film integrity; the acrylate co-monomers are comparatively more resistant. In a dry-mix mortar, the polymer film is protected from bulk hydrolysis as the cement matrix develops and free water disappears, but prolonged water immersion at 23 °C for 28 days can still reduce polymer film strength. Supplier technical literature for moderately acrylate-rich VAc-acrylate dispersions reports 60–80% retention of dry tensile adhesion after water immersion, while VAc-ethylene counterparts may retain 70–90% depending on ethylene content, and styrene-acrylate systems often exceed 90%. This places the product in the moderate-to-high alkali resistance category. Published data for this specific configuration is limited; the retention range is not a universal constant and depends on acrylate type, stabilizer, and film thickness. For applications requiring permanent water contact, such as swimming-pool tile adhesives, styrene-acrylate or pure acrylic dispersions are usually specified unless the VAc-acrylate is formulated with a high acrylate ratio and post-crosslinking. The residual acetate groups also lower local pH during hydrolysis; at high polymer additions above 15 wt% on cement, the released acetic acid can retard cement hydration by depressing pH locally, extending setting time by 1–3 h in EN 196-3 paste measurements. Therefore, the formulation boundary is not merely mechanical but chemical.
When a VAc-acrylate emulsion is combined with cellulose ether in a tile-adhesive dry mix, the rheology becomes bimodal: the cellulose ether controls water retention and high-yield-stress sag resistance, while the emulsion contributes steric obstruction and lowers yield stress if added as liquid before powder dispersion. In a 2,000 kg twin-shaft compulsory mixer, dry blending of powder components for 180 s before liquid addition is standard; injecting the emulsion too early in the sequence leads to agglomeration on the mixer shaft and a torque increase of 15–25%. Polycarboxylate ether superplasticizers at 0.1–0.3 wt% on cement can co-disperse the emulsion, but high charge density dispersants may compete for calcium ions and destabilize the colloid, producing visible microcoagulum in the mixer and uneven film formation. Naphthalene sulfonate condensates are generally less disruptive but can increase air entrainment; defoamer additions of 0.05–0.2 wt% on emulsion are often required to keep air content below 3 vol%. When used with accelerating admixtures such as calcium formate or lithium carbonate, the emulsion does not interfere with hydration acceleration, but the combination can increase early strength at the cost of longer-term film coalescence if the mortar dries before full polymer film formation. The mixing order should therefore be: dry blend powders, add two-thirds of mixing water, inject emulsion, then add residual water and defoamer; reversing this order increases batch-to-batch variability in slump and adhesion by up to 20%.
Compared with VAc-ethylene dispersions, the higher acrylate content in VAc-acrylate emulsions improves wet adhesion to non-porous ceramic and glass but raises the minimum film formation temperature unless butyl acrylate is used. The following comparison is based on typical supplier technical data, not exact commercial lot values:
| Property | VAc-acrylate | VAc-ethylene | Styrene-acrylate |
|---|---|---|---|
| Typical glass transition temperature range | -5 to +10 °C | -20 to +15 °C | 0 to +25 °C |
| Minimum film formation temperature range | 5–12 °C | 0–5 °C | 10–25 °C |
| Alkali hydrolysis resistance | moderate-high | moderate | high |
| Wet adhesion retention after 7-day water immersion | 60–80% | 70–90% | 85–95% |
| Film flexibility at 0 °C | moderate | high | low-moderate |
| Relative UV chalking resistance | low | low | moderate |
Compared with redispersible polymer powders based on the same polymer chemistry, the liquid emulsion eliminates spray-drying cost and the hydrophobic redispersant shell, but it cannot be packaged in dry-mix bags and must be handled as a separate liquid component. Powders offer better storage stability in dry conditions and simpler logistics, while the emulsion provides film formation without redispersion delays and often lower viscosity at equal polymer solids. Against pure acrylic dispersions, VAc-acrylate has lower raw-material cost but lower resistance to hydrolysis and UV-induced chalking in exterior applications; it is therefore more common in interior tile adhesives, skims, and non-structural patching compounds. Against styrene-butadiene rubber latices, VAc-acrylate gives lower odor and more complete re-wetting of dry film but lower crack-bridging capacity at low temperature.
For two-component cementitious waterproofing membranes tested under EN 14891, the VAc-acrylate emulsion can meet crack-bridging requirements at 0.5–1.0 mm when applied at 1.5–2.0 kg/m² dry film thickness, but low-temperature crack bridging below 0 °C is usually weaker than with ethylene-modified or pure acrylic dispersions. For structural repair mortars under EN 1504-3, the polymer modification improves adhesion to concrete with pull-off values above 1.5 N/mm², but the product is not recommended where sustained hydrostatic pressure exceeds 0.1 MPa or where the mortar is exposed to steam above 60 °C. The free acetic acid released by hydrolysis can corrode embedded aluminum and zinc, and the emulsion should not be used in formulations with large amounts of alkaline earth oxides designed to maintain pH above 13.5 unless the acrylate content is high. In dry-mix production, liquid emulsion storage in unheated outdoor tanks below 0 °C is an operational boundary; coagulated polymer from freeze-thaw damage cannot be redispersed and leads to specks in the finished mortar and a drop in adhesion by 20–40% when present above 0.1 wt% of total mix. These constraints define the product’s application window: it is most appropriately used in interior or sheltered exterior dry-mix mortars where moderate alkali resistance, adequate wet adhesion under intermittent moisture, and film coalescence at 5–12 °C are sufficient, while permanent water immersion, high hydrostatic pressure, or sub-zero crack bridging should trigger formulation review with alternative polymer chemistries.
