| HS Code | 870677 |
| Product | Arkema Rilsan Fine Powders BLACK RDP 15-10 ES PA11 |
| Material | Polyamide 11 (PA11) |
| Color | Black |
| Density | 1.04 g/cm³ |
| Melting Point | 186 °C |
| Bulk Density | 0.45-0.55 g/cm³ |
| Particle Size D50 | 15-10 µm |
| Tensile Strength | 48 MPa |
| Elongation At Break | 300% |
| Shore Hardness | 70 Shore D |
| Impact Resistance | Excellent |
| Abrasion Resistance | Very good |
| Chemical Resistance | Resistant to many solvents, acids, and bases |
| Moisture Absorption | 0.3% at 24h immersion |
| Dielectric Strength | 16 kV/mm |
As an accredited Arkema Rilsan Fine Powders BLACK RDP 15-10 ES PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg multi-ply paper bags with polyethylene liner: Arkema Rilsan PA11 black fine powder, grade RDP 15-10 ES. |
| Container Loading (20′ FCL) | 20′ FCL loading of Arkema Rilsan Fine Powders BLACK RDP 15-10 ES PA11, palletized, secured, and stowed for safe transit. |
| Shipping | Ship as non-hazardous polymer powder in sealed, grounded containers to prevent dust accumulation. Avoid high temperatures, moisture, and ignition sources. Use dry, ventilated transport with proper labeling and handling documentation. Ensure compliance with local regulations and keep away from incompatible materials during transit. |
| Storage | Store in a cool, dry, well-ventilated area away from ignition sources and direct sunlight. Keep the container tightly sealed to prevent moisture absorption and contamination. Avoid generating dust clouds, which may form explosive mixtures. Use grounded equipment and follow local regulations. Recommended shelf life is 12 months from date of manufacture under proper conditions. |
| Shelf Life | Shelf life: 12 months when stored unopened in a cool, dry place, away from heat and moisture. |
Arkema Rilsan Fine Powders BLACK RDP 15-10 ES PA11 is handled as a thermoplastic polyamide 11 powder in coating lines where black colour, low-water uptake and sub-zero impact resistance are specified. The grade is characterised by a melt temperature near 190°C, melt density of approximately 1.04 g/cm³ under ISO 1183-1:2019, and a narrow particle size distribution suitable for electrostatic deposition. Downstream converters should verify actual particle size d10/d50/d90 from the lot certificate of analysis under ISO 13320:2020 because powder transport, fluidisation and charging behaviour vary with particle size distribution and ambient humidity. The scenarios below are limited to industrial application fields for which PA11 fine powder coatings are commercially established.
On automated electrostatic spray lines for stamped steel spring clips and fluid-handling fasteners, the substrate is first degreased in alkaline cleaner at 60–75°C, rinsed, shot-blasted to a surface profile of 25–40 μm Rz, and preheated in a forced-air convection oven to 280–320°C. The process window on thin stampings is held within 280–300°C to avoid flow defects below 270°C and thermal yellowing above 320°C. Multi-gun corona charging is operated at 60–90 kV with gun-to-substrate distance of 150–250 mm; powder feed is adjusted to deposit 0.30–0.60 kg/m², corresponding to a fused dry-film thickness of 250–400 μm at the PA11 melt density of 1.04 g/cm³. The powder is used at 100 wt% as sole binder; if free-flowing dry-blend additives are required, fumed silica is held at 0.15–0.30 wt% and pre-dispersed in a low-shear tumble blender for 10–15 min to avoid charge decay in the venturi feed hopper. Post-fusion is conducted at 230–250°C for 3–6 min, followed by water quench to limit crystallinity drift. Curing criteria are referenced to ASTM D638-14 for tensile elongation, ASTM D3359-17 for cross-cut adhesion, ASTM B117-19 neutral salt spray exposure of 1000 h with less than 2 mm creep from scribe, and ISO 1519:2011 mandrel bend without film cracking. Production-scale failures observed on such lines include powder spitting at hopper moisture above 0.15 wt% and edge pull-back on sharp stamping burrs; pre-drying at 80°C for 4 h is applied when relative humidity exceeds 60%. Terminal product types include fuel line support brackets, brake hose clamp bodies, ABS sensor clips, and battery tie-down brackets.
In a production-scale dishwasher basket coating line, welded low-carbon steel wire assemblies are carried through a gas-fired convection preheat zone held at 300–350°C. The heated parts enter a fluidised bed of the black powder, with immersion time of 3–10 s depending on wire diameter, typically 2.5–5.0 mm. Powder addition is controlled to a fused thickness of 300–600 μm, equivalent to 0.45–0.85 kg/m² on representative basket geometry. The powder remains the sole binder at 100 wt%; post-fusion in a second oven at 230–250°C levels the film and is followed by air cooling. Because the final articles are used in repeated contact with food-contact items, compliance evaluation follows EU 10/2011 migration testing in relevant food simulants, FDA 21 CFR 175.300 for resinous and polymeric coatings used in producing, manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food, and NSF/ANSI 51 for food equipment materials where the basket is part of a commercial appliance. Detergent resistance is screened under ISO 175:2010 immersion tests at 65°C in alkaline media; film adhesion after thermal cycling is assessed by ASTM D3359-17. Production experience indicates that welded intersections require a film thickness at least 1.5–2.0× the nominal flat-wire thickness to prevent porosity at the weld heat-affected zone. Sharp radius bends below 1 mm should be radiused or coated at the upper film thickness because stress concentration after repeated hot-cold cycling can initiate circumferential cracks in thick PA11 layers. Terminal product types include dishwasher rack assemblies, cutlery baskets, drying racks, and commercial warewashing cart inserts.
Cast iron valve bodies and stainless steel pump volutes are fluidised-bed dipped with the black powder in chemical processing equipment where solvents, salt solutions, and dilute mineral acids rule out conventional epoxy powder coatings. Substrates are preheated by induction or in a forced-air oven to 300–350°C, then immersed into a fluidised bed with a porous polyethylene distribution plate operating at air pressure of 0.3–0.7 bar and bed height of 400–600 mm. The powder is applied as a 100 wt% PA11 binder without solvent; applied mass is set to 0.70–1.20 kg/m² to produce a fused film of 500–800 μm, which accommodates the thermal expansion mismatch between the coating and cast iron. Post-fusion proceeds at 230–260°C for 5–12 min with slow cooling to ambient to reduce residual stress. Compliance for chemical exposure is anchored to ISO 175:2010 immersion testing in the specific process medium at operating temperature, ASTM D543-21 for chemical resistance of plastics, ASTM D714-17 for blistering after immersion, and ISO 9227:2022 neutral salt spray for external corrosion resistance. The upper service temperature of the PA11 coating in continuous immersion should remain below 80°C; oxidizing concentrated acids and phenolic solvents are incompatible due to hydrolysis and swelling of the polyamide chain. Production bottlenecks include fluidised bed channeling when the powder bed is not dehumidified below 50% RH and sag on threaded valve flange faces above 800 μm; threaded surfaces are masked or machined after coating. Terminal product types include butterfly valve discs, check valve internal seats, pump volute linings, and agitator blade hubs.
Copper and aluminium busbar segments for battery modules and switchgear are coated via fluidised bed dipping after selective masking of contact pads. The metal is first degreased and abrasively blasted with 60–80 mesh alumina grit to produce a 30–50 μm Rz anchor profile; preheat is held at 280–320°C to fuse the powder without oxidising copper excessively. The powder is charged at 100 wt% binder; applied mass is set to 0.45–0.85 kg/m², yielding a fused insulation layer of 300–600 μm. Post-fusion is carried out at 230–250°C for 4–8 min, followed by forced air cooling. Compliance for electrical properties uses IEC 60243-1:2013 for short-time electric strength, ASTM D149-20 for dielectric breakdown voltage, IEC 62631-3-1:2016 for volume resistivity, and IEC 60112:2020 comparative tracking index where insulation coordination is part of the assembly design. The black pigmentation can reduce surface resistivity compared with natural PA11; converters must verify the grade-specific pigment package under IEC 62631-3-2:2016 if a minimum surface resistivity is specified for creepage distances. Edge radius uniformity is the main production limitation: rectangular busbar edges with radius below 0.5 mm commonly show film thinning to 40–60% of the flat-face thickness, requiring either edge radius modification or a second dip. Masked contact areas must be free of silicone adhesives because silicone migrates during preheat and causes cratering in the subsequent film. Terminal product types include prismatic cell interconnect busbars, DC busbar segments, terminal block insulation, and battery tray busbar supports.
For aluminium hinge bodies and municipal furniture frames, the black powder is specified where low-water absorption and impact resistance at outdoor winter temperatures are required. An aqueous alkaline degreaser and a chromate-free conversion coating are applied before preheat at 250–300°C; electrostatic spray guns operate at 60–80 kV with a flat spray nozzle and powder feed set to 0.30–0.50 kg/m², corresponding to a fused film thickness of 250–350 μm. The coating is used at 100 wt% as binder; any dry-blended flow control silica is kept below 0.20 wt% to avoid gloss reduction. Fusion is completed at 230–250°C for 3–5 min and is followed by forced air cooling. Outdoor qualification standards include ISO 9227:2022 neutral salt spray for 1000 h, ISO 4892-2:2013 accelerated weathering with daylight filters for 3000 h, ISO 2813:2014 gloss retention, and ISO 4624:2016 pull-off adhesion after weathering. In black formulations, overbake above 260°C produces a measurable yellow-brown shift and a drop in 60° gloss under ISO 2813:2014 more rapidly than UV exposure; the oven profile must therefore be controlled with air-temperature probes rather than monitored only at panel level. Sharp aluminium corners with radius below 1 mm should receive a light edge pass before full coating because electrostatic wrap is lower on the negative side of grounded aluminium fixtures. Terminal product types include gate hinges, handrail brackets, street furniture armrest frames, and aluminium access cover handles.
Marine deck hardware is converted with the black PA11 powder on stainless steel and aluminium substrates where galvanic compatibility, slip resistance, and resistance to saltwater abrasion are design constraints. The substrate is degreased, blasted with alumina grit of 60–80 mesh, preheated to 300–340°C, and coated by electrostatic spray or short-duration fluidised bed dip; applied powder mass of 0.70–1.10 kg/m² produces a fused film of 500–700 μm. The powder is applied at 100 wt% as the sole binder. Post-fusion at 230–250°C for 5–10 min is followed by slow cooling to reduce microcracking on stainless steel parts with high thermal expansion. Compliance testing references ISO 9227:2022 neutral salt spray for 2000 h, ISO 4624:2016 pull-off adhesion after salt spray, ISO 16276-1:2007 cross-cut adhesion on coated steel, and ISO 1519:2011 bend testing on flat witness plates. The coating is not an antifouling system and does not replace cathodic protection on immersed aluminium hull components; it is specified only for topside deck hardware above the waterline. Production failures are concentrated in areas where stainless steel was passivated with acid after coating, causing underfilm corrosion at cut edges; passivation should be completed before coating and edges should be radiused to at least 1.5 mm. Terminal product types include deck cleat bodies, rail brackets, cable clamps, and manually handled hatch handles.
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Arkema Rilsan Fine Powders BLACK RDP 15-10 ES is a black-pigmented polyamide 11 (PA11) thermoplastic coating powder intended for electrostatic spray and fluidized-bed deposition on metallic substrates. The polymer backbone is derived from 11-aminoundecanoic acid obtained from castor oil; the product therefore belongs to the bio-based polyamide 11 family rather than to petroleum-derived polyamide 12 or thermoset powder chemistries. The grade designation includes the product line, color, particle-size/flow identifier, and electrostatic application marker. It is supplied as a free-flowing, dry-blended powder and is typically specified where service conditions combine corrosion, impact, abrasion, low friction, and chemical exposure. Common components include dishwasher baskets, automotive clips, springs, pipe fittings, valve bodies, wire goods, outdoor furniture, and battery trays. The material is applied as a thermoplastic coating, not as a thermoset; it does not undergo crosslinking during the thermal fusing cycle, and the formed film can be remelted. The black pigmentation provides a consistent dark surface and contributes to ultraviolet weathering resistance, but it also modifies melt rheology and electrostatic behavior relative to unpigmented PA11 fine powders.
Supplier batch certificates for the black ES grade remain the primary specification; the values below are representative of the Rilsan PA11 fine-powder platform and do not replace lot-specific analytical data. The melting endotherm is conventionally acquired by differential scanning calorimetry per ISO 11357-3. Solid density is determined by ISO 1183-1, while bulk density is measured under standard powder-flow conditions. Residual moisture is controlled at packaging and should be confirmed by Karl Fischer titration per ISO 15512. The particle size distribution is measured by laser diffraction and is relevant to electrostatic charging, fluidization, and film smoothness.
| Property | Test method / standard | Representative range or value | Condition |
|---|---|---|---|
| Polymer base | FTIR | Polyamide 11 | Castor-oil-derived backbone |
| Appearance | Visual | Black powder | Carbon black pigmentation |
| Melting peak | ISO 11357-3 | 183–187 °C | DSC heating rate 10 K/min |
| Solid density | ISO 1183-1 | 1.03–1.05 g/cm³ | 23 °C |
| Bulk density | ISO 60 | 0.45–0.55 g/cm³ | As poured |
| Particle size D50 | ISO 13320 | 90–130 µm | Electrostatic-grade distribution |
| Residual moisture | ISO 15512 | <0.15 wt% | Packaged state |
Morphological and charge-acceptance features are controlled through particle size distribution and dry-flow additives. A mean particle diameter near 100–120 µm is generally sufficient to produce a stable cloud in corona guns while limiting the excessive fine fraction that can cause spits, venturi impact fusion, or poor fluidization. Carbon black pigment alters dielectric absorption and may change the self-limiting character of the deposited film. For that reason, transfer efficiency should be verified on a grounded steel panel using the target geometry rather than relying on values obtained for natural PA11 powders. Electrostatic charge is normally applied with negative-polarity corona emitters at 60–80 kV. Gun-to-target distance is typically held between 150 mm and 250 mm. Tribo-charging is possible, but the pigmented grade may require gun setup changes because carbon black influences charge generation rate and charge-to-mass ratio.
On grounded metal parts with holes, slots, and bracket intersections, the Faraday effect controls local film thickness. The field gradient produced by a corona gun at 70 kV drives charged particles toward exposed surfaces but does not easily deposit them inside recesses when the depth-to-width ratio exceeds 2:1. In practice, a slot narrower than 12 mm may remain undercoated if the powder cloud is directed perpendicular to the opening. Reducing gun voltage below 50 kV often worsens transfer. Raising voltage above 80 kV can produce back-ionization on parts preheated above 220 °C, because the hot conductive substrate accelerates charge neutralization and disrupts the deposited layer. Field measurements on conveyorized electrostatic lines with part openings of 250–350 mm indicate that lower conveying air volume, typically 3–4 Nm³/h, and larger diffuser outlets improve penetration by allowing the charged cloud to drift into recesses rather than being accelerated past them.
For the black ES grade, production lines often require a preheat setpoint 5–10 °C higher than that used for natural PA11 because carbon black raises melt viscosity and reduces flow into poorly accessible areas. The acceptable preheat window is bounded at the lower end by inadequate coalescence and at the upper end by thermo-oxidative degradation. The black pigment can mask yellowing, so temperature should be checked with a contact thermocouple or calibrated infrared pyrometer rather than by visual film color. On thick sections, residual heat may be insufficient to complete flow after powder deposition; a post-fusion schedule of 180–200 °C for 5–10 min is commonly applied. Operators should not rely solely on oven air temperature. Part-surface temperature and total mass are the controlling variables.
Two deposition routes are used. In electrostatic spray application, the part is cleaned and grit blasted to ISO 8501-1 Sa 2.5 with an anchor profile of 50–75 µm, then heated to 200–240 °C before spraying. In fluidized-bed dipping, the powder is fluidized and the heated part is immersed for 1–4 s; bed-adjacent part temperature is typically 250–280 °C. Dry film thickness is usually maintained at 250–400 µm for corrosion-critical components. Where edge geometry and thermal mass allow, thickness can exceed 500 µm. Crosslinking does not occur; the film remains thermoplastic.
| Process variable | Electrostatic spray | Fluidized bed |
|---|---|---|
| Substrate preheat | 200–240 °C | 250–280 °C |
| Post-fusion schedule | 180–200 °C, 5–10 min | 200–220 °C, 10–15 min if required |
| Typical dry film thickness | 250–400 µm | 300–500 µm |
| Corona voltage | 60–80 kV | Not applicable |
| Fluidization air pressure | Not applicable | 1.0–1.5 bar plenum |
Conversion from a polyamide 12 or epoxy powder line to this PA11 grade requires recalibration of preheat and dry-off stages. Compared with PA12, PA11 has a higher melting peak. A line set for PA12 at 180–200 °C may produce incomplete fusion unless part temperature is raised by 10–20 °C. The difference in melt rheology changes edge coverage: PA11 generally delivers higher edge build on sharp threads and stamping burrs, but it is less tolerant of insufficient substrate preheat. Compared with epoxy powder, the process does not require a crosslinking schedule, but it demands higher initial substrate temperature and stricter moisture control. The black pigment in BLACK RDP 15-10 ES improves ultraviolet weathering resistance relative to unpigmented PA11 and can reduce visible chalking. However, the film remains electrically insulating unless a separate conductive primer or precoat is applied.
Interfacial failure on production lines is more often caused by phosphate sludge residue or oil carryover than by cohesive failure in the PA11 film. After alkaline degreasing and iron phosphate treatment, rinse water with conductivity above 150 µS/cm can leave hygroscopic salt residues that lift the coating in condensing humidity. On blast-cleaned steel, salt contamination is assessed by ISO 8502-6 using the Bresle patch method. Total salt concentrations above 20 mg/m² as sodium chloride are generally considered unacceptable for immersion or marine exposure. Accelerated corrosion testing is usually performed per ISO 9227 neutral salt spray or ISO 6270-1 humidity. Results depend on pretreatment, dry film thickness, substrate geometry, and scribe method; published data for this specific black ES configuration is limited, so coating qualification should include control panels on the target line.
Chemical exposure is evaluated by immersion tests based on ISO 175. Concentrated hydrochloric acid and formic acid attack polyamide 11 rapidly at room temperature. Strong alkaline solutions above pH 12 can produce surface erosion under sustained exposure. Aliphatic hydrocarbons, diesel, and mineral-oil-based hydraulic fluids typically produce only minor dimensional change in polyamide 11 films tested for 168 h at 23 °C, but the result depends on additive packages and test temperature. Methanol, ethanol, and alcohol-gasoline blends can plasticize or swell the coating at elevated temperature and should be tested at the actual service temperature. The grade is not intended as a solvent-barrier liner; it is a fused thermoplastic protective layer with high impact and abrasion resistance.
Bags should be stored unopened at 5–35 °C and below 60% relative humidity. Once opened, powder should be consumed within the shift or kept in a desiccated hopper to avoid moisture-induced fluidization collapse, gun spits, and film pinholes.
Reclaimed powder should be sieved at 125 µm and limited to 30 wt% of the virgin feed unless a higher ratio is validated on the application line. Reclaimed fines increase specific surface area and alter charge-to-mass ratio, leading to film-thickness variance. The material is not a powder-bed fusion feedstock and is not formulated for laser sintering. Batch-specific certificates, substrate-specific adhesion tests, and application trials on the target geometry remain necessary because representative platform data do not establish suitability for a specific end use.
