Section
| HS Code | 331559 |
| Appearance | Milky white liquid |
| Composition | Mineral oil-based with hydrophobic silica |
| Active Content | 100% |
| Viscosity | 1000-2000 cP at 25°C |
| Specific Gravity | 0.85-0.95 g/cm³ |
| Flash Point | >150°C |
| Pour Point | ≤ -10°C |
| Ph | Neutral (6-8) |
| Solubility | Insoluble in water, dispersible in mineral oil |
| Recommended Dosage | 0.05-0.5% based on total formulation |
As an accredited A-80 General Purpose Mineral Oil Defoamer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A-80 General Purpose Mineral Oil Defoamer is packaged in 5-gallon pails or 55-gallon drums for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL: 80 drums on pallets, shrink-wrapped, banded, and securely braced with dunnage to prevent shifting during transit. |
| Shipping | A-80 General Purpose Mineral Oil Defoamer ships in sealed containers via ground freight. Not classified as a hazardous material for transport under DOT/ADR. Protect from freezing and extreme heat. Standard LTL or parcel shipping available. Ensure containers remain upright and secure during transit. |
| Storage | Store A-80 General Purpose Mineral Oil Defoamer in a cool, dry, well-ventilated area in its original, tightly sealed container. Keep away from direct sunlight, heat, sparks, and open flames. Avoid freezing and protect from moisture contamination. Ensure container is clearly labeled and inaccessible to unauthorized personnel. Maintain secondary containment to prevent spills and environmental release. |
| Shelf Life | Shelf life is typically 12 months from date of manufacture when stored in original container at moderate temperatures. |
In waterborne architectural coating manufacturing, air entrainment during pigment dispersion extends grind residence time and depresses high-speed disperser throughput because entrained microfoam reduces energy transfer from the Cowles sawtooth impeller to the millbase. A-80 is metered in two portions: 0.05–0.15 wt% into the pigment grind at a total batch weight of 1,500 kg and 0.05–0.15 wt% during letdown, giving a total addition of 0.1–0.3 wt% per formulation. The grind phase uses a 75 kW frequency-controlled high-speed disperser with a 0.45 m Cowles disk at 12–18 m/s; untreated foam can lower millbase density from 1.28 kg/L to 1.04 kg/L in a 65 wt% solids titanium dioxide slurry. In the letdown tank, a 2,000 L vessel fitted with a low-speed anchor impeller at 30–60 rpm receives the remaining defoamer only after the resin emulsion, coalescing agent, and associative thickener have been incorporated, because thickener solutions at pH 8.0–9.0 can otherwise amplify entrained air into visible cratering on the dried film. The final coating is covered by Directive 2004/42/EC Annex IIA waterborne interior matt limit of 30 g/L VOC; the non-volatile contribution of A-80 is determined by ISO 3251:2019. Terminal products are interior matt emulsion paints, ceiling whites, and waterborne acrylic primers for drywall and plaster substrates; these grades must meet wet scrub resistance classification under EN 13300 without surface oil separation. The upper practical dosage is 0.5 wt%; beyond this threshold, gloss reduction and intercoat adhesion failure appear in vinyl acrylic topcoats on production-scale filling lines.
Polyvinyl acetate homopolymer and ethylene-vinyl acetate copolymer emulsion compounding entrains air during solids adjustment, plasticizer addition, and thickener dissolution, and A-80 is added post-compounding at 0.05–0.2 wt% of total emulsion weight in a 1,500 L jacketed low-shear mixer with an anchor impeller at 20–40 rpm, after the batch temperature has fallen below 40 °C. Addition before cooling destabilizes the mineral oil droplets and produces oil streaks on the vessel wall; in high- PVAc systems, dosing above 0.3 wt% saturates the polyvinyl alcohol protective colloid at the air-adhesive interface and reduces wet tack during open assembly time testing, while clear grades develop visible haze at concentrations above 0.2 wt%. The compounded adhesive is tested for viscosity by ASTM D1084-16, and the resulting woodworking grade is classified under EN 204:2016 durability category D3. Under REACH Regulation (EC) No 1907/2006, the mineral oil fraction of A-80 is carried in the polymer emulsion safety data sheet as an industrial-use additive. Terminal products include D3 polyvinyl acetate wood bonding adhesives for softwood edge joints, aqueous lamination adhesives for paperboard, and waterborne bookbinding emulsions. A-80 is not recommended for pressure-sensitive adhesive formulations where free mineral oil migration can decrease loop tack and peel adhesion after 30 days of contact with silicone release liners.
Because municipal and industrial wastewater equalization basins contain suspended solids at 500–3,000 mg/L and surface-active agents from detergents, cutting fluids, and food processing residues, foam height can reduce oxygen transfer in aeration tanks and overflow weir structures. A-80 is dosed neat or as a pre-diluted 1–2 wt% emulsion at 2–20 ppm active concentration based on basin inflow, typically via a 24 V DC diaphragm metering pump interlocked with a suspended-solids transmitter. The feed point is located downstream of the bar screen and grit chamber but upstream of the aeration basin distribution baffle, where turbulence at the weir reintroduces air. In an activated sludge line at mixed liquor suspended solids of 2,500–4,000 mg/L, mineral oil defoamer residues may be partially retained on the floc surface and biodegrade under aerobic solid retention times of 8–15 days; however, the remaining hydrocarbon load must be measured under ISO 9377-2:2000 or an equivalent discharge permit. Compliance is governed by the EU Industrial Emissions Directive 2010/75/EU BAT conclusions for common waste water and waste gas treatment, where petroleum-derived antifoam components are included in the oil inventory if site mass thresholds are exceeded. The terminal output is treated effluent meeting a typical municipal permit of 25 mg/L biological oxygen demand and 35 mg/L total suspended solids; A-80 does not replace polyaluminium chloride at 10–50 mg/L product in tertiary coagulation. Published data for the specific hydrocarbon degradation half-life of A-80 in activated sludge is limited, so discharge permits should be confirmed with site-specific pilot dosing.
Self-leveling underlayment production introduces A-80 into the dry mortar circuit only after the cement, redispersible polymer powder, calcium sulfate hemihydrate, and retarder have been dry-blended. The liquid defoamer is either pre-emulsified in gauging water or sprayed through a lance at 2–4 bar onto the dry mineral premix at 0.2–0.4 wt% of total dry solids. Plant mixing is performed in a 1,000 L horizontal ploughshare mixer or a 2,000 kg twin-shaft paddle mixer for 180–240 s; the defoamer must not be injected into the mixer before the polymer powder because organic liquid absorption into the protective colloid of the polymer powder creates agglomerates and sticky bridge formation. Air content of fresh mortar is controlled to 2.0–3.5 vol% when measured by EN 1015-7:1998. Dosages above 0.5 wt% cause mineral oil migration to the mortar surface during the first 15–20 min after gauging, producing a bond-breaking film between the hardened compound and subsequent polyurethane adhesive or epoxy primer layers; bond strength then declines when tested by EN 1542 pull-off. Compliance falls under EN 13813:2002 for self-smoothing compounds and Regulation (EU) No 305/2011 CE marking. Terminal products are calcium sulfate flowing screeds, cementitious self-leveling underlayments for vinyl and LVT installation, and water-mixed repair mortars with a flow ring spread of 140–180 mm. This application is outside the recommended window for anhydrous epoxy or polyurethane overlays where any residual surface oil defeats primer adhesion.
Entrained air in paper coating color is a throughput-limiting variable on high-speed blade coaters because microfoam collapses under the blade pressure pulse and creates skip coating, streaks, and bleed-through on base paper. A-80 is metered continuously into the coating kitchen at 0.05–0.15 wt% based on dry pigment weight, usually after carboxymethyl cellulose and styrene-butadiene latex letdown, using a progressive cavity pump. The circulation loop includes a 2,000 L working tank, a 50 m³/h screen, and a 1.0–1.5 bar return line; air content is monitored by density meter with a target density loss below 2% relative to the deaired laboratory reference. Overdosing above 0.25 wt% causes water repellency spots on clay-coated kraft and raises Cobb water absorption from 25 g/m² toward 35 g/m², outside the tolerance for aqueous flexographic printability. The coated base is produced on a blade coater at 800–1,400 m/min, and the terminal products include coated fine paper for catalogues, coated folding boxboard for aqueous flexographic packaging, and thermal paper base. Compliance is assessed under EU pulp and paper BAT conclusions for whole-mill emissions and REACH Regulation (EC) No 1907/2006; mineral oil content in mill sludge may be subject to local oil discharge limits. Food-contact grades are excluded unless migration testing under BfR Recommendation XXXVI or Regulation (EC) No 1935/2004 is completed and passed.
Water-based flexographic ink formulated with acrylic-acrylate resin solution and organic pigment dispersion reaches press viscosity of 25–45 s on ISO 2431:2019 6 mm cups after letdown. A-80 is added at 0.1–0.5 wt% of the finished ink mass, after pH adjustment to pH 8.5–9.5 with ammonia or amino alcohol; below pH 6.5, the mineral oil emulsion can destabilize and deposit oil-rich spots on ceramic anilox rollers. High-speed pumping through anilox chambers, doctor blade chambers, and return hoses at 80–120 m/min press speed generates foam that shadows anilox cells and causes pinholes on polyethylene film and coated paperboard. Press-side quality control uses a 200 mL graduated foam column; a target foam half-life below 60 s at 25 °C is used for start-up colors. Compliance is governed by EuPIA raw material suitability procedures and REACH Regulation (EC) No 1907/2006; print quality is evaluated under ISO 12647-6:2020. Terminal products are water-based flexographic inks for bleached kraft shopping bags, corrugated shipping cases, and non-food primary labels. Concentrations above 0.6 wt% introduce pinhole bridging failure on high-holdout films and reduce cross-cut tape adhesion under ISO 2409:2020. High-gloss overprint varnishes are outside the recommended use window because even 0.2 wt% can reduce gloss by 10–15 gloss units at 60° when measured by ISO 2813.
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Model A-80 is supplied as a general-purpose mineral oil defoamer in which a paraffinic/naphthenic carrier oil is combined with hydrophobic silica and a non-ionic surfactant package. The product is intended for aqueous process streams where foam is stabilized by anionic surfactants, starch, latex, or natural wood pitch. The defoaming mechanism relies on spreading and bridging: the mineral oil droplet penetrates the foam lamella, establishes a low-surface-energy lens, and ruptures the film. Knockdown efficiency is therefore a function of droplet size distribution, contact time, and the ionic environment of the process water rather than active content alone.
Representative property ranges for this product class are given in Table 1. These are not batch release specifications; they establish a technical envelope against ISO and ASTM methods. The batch certificate of analysis should be used for production-scale metering calculations.
| Parameter | Representative range | Test method |
|---|---|---|
| Density at 15 °C | 0.86–0.91 g/cm³ | ISO 12185 |
| Kinematic viscosity at 40 °C | 180–650 mm²/s | ASTM D445 |
| Flash point, PMCC | >150 °C | ASTM D93 |
| pH as 5% dispersion in deionized water | 5.0–7.5 | ISO 10523 |
| Non-volatile content, 2 h at 105 °C | 97–100 wt% | ISO 3251 |
| Pour point | −10 to +5 °C | ASTM D97 |
Published data for the exact A-80 formulation is limited; values should be confirmed with the supplier’s certificate of analysis for the manufactured batch. Neat A-80 disperses in water under mild agitation, forming a milky emulsion with a droplet size that depends on shear. Below 200 rpm in a standard stir tank, the emulsion may exhibit creaming within 30 min. This does not necessarily indicate product failure but requires recirculation or in-line mixing.
In recovered-fiber papermaking, foam is stabilized by saponified pitch, anionic deinking surfactants, and oxidized starch. A-80 is normally evaluated with a bottle shake test based on ASTM D3601 using a 0.1 wt% sodium dodecyl sulfate solution at 25 °C. Under those laboratory conditions, mineral oil defoamers of this class typically produce foam collapse times of 10–30 s. On a paper machine running 600–900 m/min with a 1.2 m fourdrinier wire, foam can accumulate at the wire pit, suction boxes, and save-all tray. The product is dosed continuously at 5–20 ppm based on white-water volume, with the addition point selected based on foam location. Unlike silicone polyether defoamers, a mineral oil defoamer of this class presents a reduced risk of fisheyes in subsequent coating applications because the carrier is less surface-active on coated board after drying. However, if foam persists after dosage, poor dispersion is often the limiting variable. A static mixer installed after the injection quill should deliver a mean droplet diameter below 50 µm; larger droplets reduce contact area and increase oil separation.
In surface sizing and coating color applications, mineral oil defoamers are added at 0.05–0.15 wt% on total coating color. The product has a lower deaerating effect than hydrophobic silica/silicone defoamers but is less likely to alter rheology. In blade coating, excessive dosage above 0.3 wt% can reduce wet coating gloss and interfere with binder distribution. This is a known operational boundary.
Silicone polyether defoamers of comparable viscosity exhibit knockdown times of 3–10 s in the same ASTM D3601 bottle shake test but can produce visible film defects in waterborne coatings at 0.1 wt%. A-80 typically gives slower knockdown, 10–30 s, but fewer surface defects. EO/PO block copolymer antifoams may show better alkaline stability above pH 10, whereas A-80 is recommended below pH 9 for continuous exposure. In high-temperature processes above 80 °C, mineral oil carriers may lose persistence because of reduced oil viscosity and faster droplet coalescence. Published data for this specific formulation above 80 °C is limited.
In high-shear dispersion applications, A-80 should be metered neat through a progressive cavity pump with a pulse-free discharge and injected via a 6.35 mm quill into the turbulent zone of a recirculation loop. Static mixers with 6–10 elements downstream of the injection point are used to create a mean droplet diameter below 50 µm before the defoamer enters the holding tank. Droplet size affects persistence: as the mean droplet diameter increases above 100 µm, oil separation and creaming can occur within 30–60 min in stagnant zones. In a 50 m³ white-water silo with a residence time of 45 min, batch-to-batch variance in cationic polymer carryover can shift foam knockdown time by 8–12 s; this occurs because cationic polyelectrolytes form electrostatic bridges with hydrophobic silica and reduce droplet spreading. When this situation is observed, in-line dilution with process water at 1:1–1:5 by volume can restore dispersion without increasing the total mass feed rate.
A-80 should not be pre-diluted with water more than 24 h before use unless a biocide is present. Extended dilution can increase total aerobic plate count; compliance should be checked by ISO 9308-1 if storage exceeds 24 h. Published data for this specific configuration is limited, so production trials are required.
Aeration vessels in wastewater treatment generate foam from extracellular polymeric substances and filamentous bacteria. A-80 can be sprayed onto the foam blanket at 2–10 ppm active, but mineral oil defoamers are susceptible to hardness-induced destabilization if the carrier emulsion separates in water above 1000 ppm CaCO₃ equivalent. The product should be pre-diluted with softened water below 200 ppm hardness and used within 24 h to avoid phase separation. In open activated sludge basins, oil-based defoamers may contribute to chemical oxygen demand; published data for this specific product configuration is limited, and plant trials should measure COD increments using ISO 15705 before continuous dosing.
If the foam persists after the first dose, the addition point should be moved to the launder or the upstream distribution box rather than the aeration header. Mineral oil defoamers lose efficiency when injected directly into high-shear aerators because the droplets are dispersed too finely and are consumed rapidly. A mean droplet diameter below 10 µm can reduce knockdown persistence in strongly aerated systems. The control window for droplet size is approximately 20–80 µm, depending on the specific wastewater matrix.
In the United States, mineral oil defoamers used during paper and paperboard manufacture are addressed under 21 CFR 176.210 when the finished article is intended for food contact. The specific oil and silica components of A-80 must be listed in the regulation and comply with any extractive limitations. For direct food-processing use, 21 CFR 173.340 governs defoaming agents; not all mineral oil defoamers are automatically permitted under direct-food applications. EU compliance for paper and board food contact is typically evaluated against BfR Recommendation XXXVI, which contains a positive list for mineral hydrocarbons with migration testing requirements. REACH registration must cover the imported or manufactured tonnage band under EC 1907/2006.
| Regulatory reference | Scope | Condition to be verified |
|---|---|---|
| 21 CFR 176.210 | Defoaming agents used in manufacture of paper and paperboard | Component must be listed in regulation; extractives must meet applicable limits |
| 21 CFR 173.340 | Defoaming agents in direct food processing | Mineral oil must be used within specified limitations; not all grades qualify |
| BfR Recommendation XXXVI | Paper and board for food contact | Migration testing for mineral hydrocarbons may be required |
| EC 1907/2006 | REACH registration | Tonnage band and registration obligations must be confirmed for the supply chain |
Storage is recommended at 5–40 °C in closed vessels. Product exposed to repeated freeze-thaw cycles may separate, and the material should be homogenized before use if the temperature falls below 0 °C. Avoid contact with strong acids and strong oxidizing agents; mineral oil carriers can react or degrade under such conditions. Avoid mixing with amine-based additives in undiluted form because the resulting adducts can destabilize the hydrophobic silica and reduce knockdown. Within these boundaries, A-80 is suitable as a general-purpose foam-control agent in aqueous industrial systems where silicone-free performance or cost-balanced foam control is required.
