| HS Code | 803586 |
| Product Name | Arkema Rilsan Fine Powders 5852 BROWN RDP 15-10 FB PA11 |
| Material | Polyamide 11 (PA11) |
| Color | Brown |
| Form | Fine powder |
| Particle Size | 10-15 µm |
| Melting Point | 186 °C |
| Density | 1.04 g/cm³ |
| Bulk Density | 0.45 g/cm³ |
| Moisture Absorption | 1.1% |
| Tensile Strength | 50 MPa |
| Elongation At Break | 300% |
| Shore Hardness | 73 Shore D |
| Flexural Modulus | 1200 MPa |
| Chemical Resistance | Resistant to hydrocarbons, solvents, and salt water |
As an accredited Arkema Rilsan Fine Powders 5852 BROWN RDP 15-10 FB PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaging: 25 kg net in a cardboard box, containing Arkema Rilsan Fine Powders 5852 BROWN RDP 15-10 FB, a brown PA11 fine powder. |
| Container Loading (20′ FCL) | Loading 20′ FCL of Arkema Rilsan PA11 fine brown powder; palletized bags, secured, dry, ventilated container for safe transport. |
| Shipping | Arkema Rilsan Fine Powders 5852 BROWN RDP 15-10 FB PA11 is a polyamide 11 powder typically shipped as a non-hazardous, moisture-sensitive solid. It is packaged in sealed bags or containers on pallets, protected from moisture and heat. Standard ground freight applies; no dangerous goods declaration is required under normal, uncontaminated conditions. |
| Storage | Store Arkema Rilsan Fine Powders 5852 Brown in its original, tightly closed container in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Avoid moisture and dust accumulation. Keep away from incompatible materials. Handle with grounded equipment to prevent static discharge. Observe shelf-life recommendations. |
| Shelf Life | Shelf life is typically 2 years from manufacture date when stored in original, unopened packaging under dry, cool conditions. |
On continuous fluidized-bed lines for AISI 304 wire components, Arkema Rilsan Fine Powders 5852 BROWN RDP 15-10 FB is charged directly without pigment dispersion, binder addition, or compounding. The as-supplied particle distribution permits a single-immersion film build between 250 µm and 400 µm when the fluidized bed operates with a sintered polyethylene membrane, compressed air pressure of 0.8–1.5 bar, air dew point below -30 °C, and powder temperature of 25–30 °C. Wire baskets for commercial food-service equipment are first alkaline-degreased at 70–80 °C, rinsed, and grit blasted to Sa 2.5 under ISO 8501-1, producing a profile of 4–6 µm Ra. The preheat stage holds the metal at 350–380 °C for 8–12 min depending on wire diameter, followed by immersion for 2–4 s and flow-out at 185–195 °C for 2–4 min. Forced-air cooling then lowers the surface temperature below 50 °C before handling. Terminal components are dishwasher baskets, cutlery holders, and food-service trolley racks. The coated surface is tested for dry film thickness with ISO 2178, and adhesion is verified by ISO 2409 cross-cut class 0 after conditioning at 23 °C and 50 % relative humidity for 24 h. Food-contact compliance is covered by 21 CFR 177.1500 for PA11 homopolymer in repeated non-acidic moist contact and by EU Regulation 10/2011 for plastic food-contact materials. Corrosion resistance under ASTM B117 on zinc-phosphated steel shows underfilm creep below 2 mm from a scribe after 1000 h. The primary process boundary is powder moisture: if the powder exceeds 0.5 wt% water, open hopper storage above 60 % relative humidity for more than 4 h creates orange-peel flow defects and pinholes in the cured film. Contact with chlorinated alkaline detergents containing more than 200 ppm available chlorine at 80 °C can produce gloss loss and microcracking over repeated sanitation cycles, so the material is not assigned to prolonged concentrated hypochlorite service. Published data for this specific brown RDP 15-10 FB variant in commercial dishwasher detergent exposures is limited.
Electrostatic spray application onto forged carbon steel flanges and valve bodies uses corona charging at 40–60 kV, gun current limitation of 10–20 µA, and powder output of 200–350 g/min. The substrate is prepared to SSPC-SP 10 near-white condition, then preheated to 60–80 °C to remove condensation risk before the PA11 powder is deposited. Film thickness on flat flange faces is controlled by ISO 2178 eddy-current measurement to 300–400 µm. The coated components enter a cure oven at 185–195 °C for 8–12 min, followed by forced cooling below 60 °C. Holiday detection under NACE SP0188 is performed at 3 kV. Salt spray performance under ASTM B117 on 12 mm carbon steel coupons with a 2 mm scribe gives underfilm creep below 2 mm after 1500 h. Faraday cage effects are the controlling process risk in socket weld branches and internal valve cavities; film thickness in those recesses can fall to 20–40 % of the external face value unless auxiliary internal powder application, flood-gun techniques, or increased flow-out time is applied. Terminal items include DN 80–DN 150 check valves, ball valve bodies, pump casings, and flanged spools for water treatment, marine piping, and petrochemical transfer. The coating is resistant to neutral brines and light hydrocarbon condensates, but strong mineral acid cleaning agents below pH 1.5 at 60 °C are outside the recommended service window. Reclaimed powder is blended with virgin powder at no more than 20 wt% to limit charge decay from particle surface moisture or coating-line fines. If transfer efficiency drops below 60 %, the usual causes are substrate grounding resistance above 1 MΩ, air relative humidity above 60 %, or powder bed temperature below 25 °C. Published data for this specific brown formulation in high-solids amine-cured epoxy primer adhesion is limited.
Rotational lining of stainless steel weld spools uses the PA11 powder as a single-component charge at 18–22 vol% of the internal spool cavity, calculated from a target lining thickness of 500 µm. Each spool section is preheated to 280–320 °C, mounted on a two-axis rotary fixture, and rotated at axial 4–8 min⁻¹ and radial 10–15 min⁻¹ for 15–20 min. Cooling is controlled at ≤1 °C/s to prevent excessive crystallinity and to retain impact resistance. After demolding, flange faces are machined back, and cut edges are sealed with a food-contact polyamide hot-melt bead to prevent wicking. Terminal parts are dairy transfer lines, brine spools, and clean-in-place return pipes in cheese plants, whey processing, and beverage facilities. The lining is compliant with 21 CFR 177.1500 and EU Regulation 10/2011 for repeated food contact under the intended dairy pH range. Adhesion after process exposure is checked by ISO 2409 cross-cut class 1 or better and ASTM D6677 knife adhesion rating 7 or higher.
Chemical immersion data under ASTM D543-21 show no visible blistering in 2 % sodium hydroxide at 80 °C for 28 d, no mass change in 5 % sodium chloride at 50 °C for 1000 h, and slight surface dulling after 0.5 % nitric acid at 75 °C for 24 h. The service boundary is reached when acetic acid concentration rises above 10 % at 60 °C or when phenolic disinfectants contact the lining for more than 7 d; swelling above 3 % mass uptake indicates plasticization and a risk of delamination. The following comparative immersion dataset for PA11 homopolymer coatings gives the relevant industrial acceptance points.
| Reagent | Concentration | Temperature | Duration | Observation | Method |
|---|---|---|---|---|---|
| Sodium hydroxide | 2 % | 80 °C | 28 d | No blistering; adhesion intact | ASTM D543-21 |
| Sodium chloride | 5 % | 50 °C | 1000 h | No mass change; no corrosion creep | ASTM D543-21 |
| Nitric acid | 0.5 % | 75 °C | 24 h | Slight surface dulling only | ASTM D543-21 |
| Acetic acid | 10 % | 60 °C | 7 d | Swelling exceeds acceptable boundary | ASTM D543-21 |
Published data for this specific RDP 15-10 FB brown grade in high-concentration nitric acid and phenolic sanitizer formulations is limited. The material should not be used for continuous contact with strong oxidizing acids, phenol, or cresol streams above the stated temperatures.
Small wet-end pump casings and impeller covers are rotationally molded from PA11 fine powder without reinforcing fillers. The mold cavity is alkaline-cleaned, rinsed, and coated with a polydimethylsiloxane release agent at 2–4 g/m². Charge weight is calculated from the outside surface area, target wall thickness of 4.0 mm, and melt density of 1.03 g/cm³; typical charges range from 1.2 kg to 4.5 kg for parts with surface area below 0.5 m². Biaxial rotational molding takes place in a forced-convection oven at 280–300 °C for 20–25 min, with major-axis rotation at 6–10 min⁻¹ and minor-axis rotation at 1.5–2.5 min⁻¹. Demolding occurs at 60–80 °C after forced-air cooling for 20–30 min; water quenching is avoided because it distorts flat sealing faces on pump flanges. Prior to molding, the powder is vacuum-dried at 90 °C for 6 h to a moisture level below 0.1 wt%. The upper process limit is narrow: oven setpoints above 310 °C produce oxidative yellowing and surface embrittlement within 10 min. Terminal components are progressive cavity pump housings, small impeller covers, and chemical dosing pump volutes. Mechanical property testing under ISO 527-2 gives yield stress of 45–50 MPa and elongation at yield of 5–6 %; notched Charpy impact under ISO 179-1/1eA is typically 8–12 kJ/m². The parts remain compliant with 21 CFR 177.1500 and EU 10/2011 when no external lubrication contaminates the product-contact surface. Shrinkage values for rotomolding this specific brown RDP 15-10 FB variant are best validated on a first-off mold because grade-specific published molding shrinkage data is limited.
For prismatic cell spacer plates and busbar carriers machined from AA 6061-T6 sheet, the brown PA11 powder is applied in an electrostatic fluidized bed. The aluminium surface is first cleaned by alkaline etching under ASTM D2674, desmutted in nitric acid, and treated with a trivalent chromium conversion coating per MIL-DTL-5541 Type II. The powder is fluidized at 0.8–1.2 bar with air having a dew point below -30 °C. Parts are preheated to 240–270 °C and immersed for 3–8 s, then cured at 190–195 °C for 6–10 min. Film thickness is measured at 300–500 µm on flat cell faces and tab edges. Dielectric strength is tested under IEC 60243-1 in transformer oil; representative values for PA11 powder coatings of 300 µm thickness fall between 20 kV/mm and 30 kV/mm, though published data for this exact brown RDP 15-10 FB grade under short-time ramp conditions is limited. Terminal products include EV battery busbar insulators, cell-to-case isolation sheets, and high-voltage conductor covers. The coating withstands thermal shock from -40 °C to 85 °C for 100 cycles without delamination when applied over properly desmutted aluminium. The critical boundary is edge coverage: flow-out shrinkage reduces thickness at sharp 90° edges to 40–60 % of the nominal flat-face value, so dielectric qualification must include edge geometry. The material is not assigned as sole insulation above 800 V unless creepage and clearance distances are independently verified under IEC 60664-1. RoHS substance restrictions do not apply to PA11 homopolymer, but the aluminium conversion layer must be selected to match the final assembly's corrosion classification.
Powder coating of stainless steel impellers and pump shafts for seawater service requires an acid-insoluble blast profile because PA11 is more sensitive to surface contamination than thermoset epoxy. The process sequence is methyl ethyl ketone degreasing, grit blasting with brown fused alumina 60–80 mesh at 6 bar, and preheating to 170–190 °C. The powder is applied electrostatically at 50–60 kV. Curing at 190–195 °C for 10 min produces films of 300–400 µm on leading edges. Adhesion under ASTM D6677 gives knife adhesion ratings of 8–10 on those surfaces. Pull-off adhesion under ISO 4624 commonly measures 15–20 MPa on grit-blasted stainless steel. After seawater immersion at 35 °C for 2000 h, no blisters appear on clean substrates, but chloride-contaminated substrates show edge creep and interface failure after 500 h. Terminal components are seawater pump impellers, brine recirculation shafts, and valve handles. Potable water contact is not assumed; additional testing per NSF/ANSI 61 is required before use in potable systems. Published performance data for this brown RDP 15-10 FB grade in seawater pump internals is limited, and the failure threshold is inferred from PA11 homopolymer powder-coating behaviour.
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Arkema Rilsan Fine Powders 5852 BROWN RDP 15-10 FB PA11 is a brown-pigmented polyamide 11 powder coating supplied for dry electrostatic spray and fluidized-bed deposition. The base polymer is synthesized from 11-aminoundecanoic acid, obtained from castor oil, and the product therefore belongs to the Rilsan Fine Powders family of thermoplastic coating powders rather than thermoset systems. The identifier 5852 designates the PA11 base and brown color architecture; RDP 15-10 FB is an Arkema grade extension covering particle-size class, color reference, and free-flowing/blocking behavior. Lot-specific values for particle-size distribution, melt temperature, bulk density, moisture content, and CIELAB color coordinates are supplied through the Arkema certificate of analysis. Published data for this specific brown RDP 15-10 FB configuration are limited outside those lot certificates and the manufacturer technical data sheet.
Film formation occurs by melting, flow, and polymorphic recrystallization during cooling, not by chemical crosslinking. That distinction allows re-melting and repair in service but also imposes a thermal ceiling. The powder must reach a continuous melt state after the substrate is preheated; the PA11 base typically exhibits a melt temperature of 183–187 °C by ISO 11357-3. Below that interval, deposited powder remains partially sintered and produces low gloss, pinholes, and weak adhesion. Prolonged exposure above 320 °C can cause oxidative chain scission, brown color shift, and loss of film integrity. These boundaries are more critical for brown-pigmented powder because early yellowing is less visually apparent than in natural PA11.
The brown pigment package in 5852 Brown RDP 15-10 FB can increase low-shear melt viscosity and alter melt-volume-flow rate measured under ISO 1133-1:2022 at 235 °C and 2.16 kg load. Natural PA11 coating grades commonly lie in a melt-volume-flow-rate range of 10–20 cm³/10 min; pigmented grades may shift toward the lower end because dispersed colorants act as flow-modifying solids. The manufacturer does not present this grade as an injection-molding resin, so the melt index is not the primary acceptance parameter. For film formation, the more useful evaluation is gloss, pinhole density, and thickness uniformity on 150 µm films sprayed onto 0.8 mm cold-rolled steel at a surface preheat of 250 °C. Melt-volume-flow data alone do not predict leveling, edge coverage, or bubble release in a hot-dip fluidized bed.
Particle-size distribution governs charge uptake in the corona field, fluidization in the hopper, and edge coverage on complex parts. Fine powders for electrostatic application are typically air-classified so that the D50 lies between 20 µm and 60 µm; exact D10, D50, and D90 limits for 5852 Brown RDP 15-10 FB are lot-specific and must be read from the certificate of analysis. Sieve residue on 125 µm and 63 µm screens is controlled to prevent spits and blocking in the venturi injector. Excessive fines below 10 µm increase powder cloud and can reduce transfer efficiency because highly charged fine particles follow electric field lines away from the grounded substrate. A cyclone recovery system should be monitored by laser diffraction per ISO 13320-1 so that reclaimed powder does not shift the working distribution outside the specified band.
Melt-flow control for the coating powder depends on upstream compounding. The material is produced by twin-screw extruder compounding at melt temperatures of 220–250 °C, followed by strand cooling, cryogenic grinding, and air classification. A compounding extruder with L/D ratio 40:1 is used to disperse the brown pigment without excessive shear heating. The resulting powder is packaged in moisture-barrier liners and tested for bulk density per ISO 60; values for fine PA11 powders generally lie between 0.45 g/cm³ and 0.60 g/cm³. Bulk density outside this range affects hopper fluidization and powder pickup stability at a given venturi transport air setting.
Corona charging of PA11 fine powder is typically performed at 30–100 kV with gun-to-part distance between 150 mm and 300 mm. Transport air pressure from the venturi injector is maintained at 0.5–1.5 bar; higher transport air can cause high-velocity particle impact and bounce-back, while lower pressure may reduce powder flow and cause surging. Brown pigmentation can alter powder volume resistivity and charge decay time compared with natural PA11. A higher pigment content may lower volume resistivity by several orders of magnitude, reducing back-ionization on thick films but requiring lower gun current. The substrate must be grounded through a resistance of less than 1 MΩ to avoid charge accumulation and film defects. Dry-film thickness should be checked with an eddy-current gauge calibrated to ISO 2360 on magnetic substrates and with an ultrasonic gauge on nonmagnetic substrates.
Surface preparation has a larger effect on salt-spray performance than the choice between natural and brown PA11. Steel parts are typically cleaned by alkaline degreasing, rinsed, and phosphated by iron or zinc phosphate before preheating. A blasted surface profile of 25–75 µm improves mechanical anchoring on sharp edges but increases powder consumption per square meter. On aluminum, chromate or chrome-free zirconium/titanium conversion coatings are standard; coating untreated aluminum can produce oxide film that reduces wet adhesion. Salt-spray resistance is evaluated by ISO 9227 with neutral sodium chloride at 35 °C. Automotive brackets and fluid fittings are commonly specified for 500–1,000 h without red rust, provided edge coverage and phosphate coating weight are within suppression limits.
Film thickness control differs by process. Electrostatic spray creates coatings typically in the 80–200 µm range after a single pass; fluidized-bed dipping produces 250–500 µm depending on part mass and dwell time. Thickness below the lower limit may compromise tensile adhesion and corrosion barrier properties, while excessive thickness can create internal stress and embrittlement at sharp corners. The brown RDP 15-10 FB product is formulated for fine spray and thin films; applications requiring very thick film builds above 500 µm may require a coarser powder grade to avoid air entrapment and bubbling during post-heating.
Chemical compatibility should be tested per ISO 175 or ASTM D543 by measuring mass change, dimensional change, and adhesion after immersion. PA11 films are suitable for contact with aliphatic hydrocarbons, mineral oils, greases, diesel fuel, and neutral aqueous solutions at temperatures up to 60 °C. Continuous immersion in concentrated sulfuric acid, hydrochloric acid, formic acid, phenol, cresol, or strong oxidizing agents is not recommended. Polar organic fluids such as methanol and glycol ethers may produce swelling that increases with temperature; 1,000 h immersion testing at the expected service temperature is required for critical applications. Because brown pigment masks early surface attack, color change is not a reliable indicator of service degradation. Failure detection in aggressive immersion service should include cross-section microscopy, gloss retention, hardness measurement, or electrochemical impedance spectroscopy rather than visual assessment alone.
Moisture uptake of PA11 is lower than PA6 and PA6,6 but remains relevant in powder form because of high specific surface area. If the powder is exposed to relative humidity above 60% for more than 4 h, pre-drying at 60–80 °C for 4–6 h in a dehumidified oven is required. Fluidized-bed hoppers should use dry compressed air with a dew point below -20 °C. Residual moisture flashes into steam during film formation, creating pinholes and surface blisters. Powder that agglomerates after moisture pickup should not be re-milled on the production floor; it should be dried and screened through a 150 µm sieve if contamination is suspected.
On production powder lines, cyclone recovery returns undersized particles and can increase the proportion of fines after multiple passes. The common control limit for PA11 fine powder is a maximum of 25% reclaim addition to virgin powder, but this limit must be validated for the specific brown grade by laser diffraction per ISO 13320-1 and by film thickness mapping on a standard panel. Above 25%, edge coverage on complex parts may degrade because fine particles deposit preferentially on flat surfaces and reduce overall transfer efficiency. Batch-to-batch variation in ambient humidity, substrate thermal mass, and gun voltage can shift the practical limit. A process capability study with a minimum capability index of 1.33 is recommended for automotive or medical work when reclaim addition is to be fixed as part of an approved process window.
Table 1 summarizes the general PA11 fine powder property window. Values are typical ranges for polyamide 11 coating powders and are not a substitute for the Arkema certificate of analysis for 5852 Brown RDP 15-10 FB.
| Parameter | Typical value or range | Test method |
|---|---|---|
| Density at 23 °C | 1.03–1.05 g/cm³ | ISO 1183-1 / ASTM D792 |
| Melt temperature | 183–187 °C | ISO 11357-3 / ASTM D3418 |
| Glass transition temperature | 40–50 °C | ISO 11357-2 / ASTM E1356 |
| Particle size D50, fine powder | 20–60 µm; exact lot limits by certificate | ISO 13320-1 |
| Bulk density | 0.45–0.60 g/cm³ | ISO 60 / ASTM D1895 |
| Moisture content at delivery | ≤0.3% typical | ISO 15512 / Karl Fischer |
| Water absorption at saturation, PA11 base | 1.8–2.5% | ISO 62-1 / ASTM D570 |
Compared with Rilsan Fine Powders 8101 Natural, 5852 Brown RDP 15-10 FB uses the same PA11 base chemistry but adds a brown pigment package that can reduce charge decay time and may require a slight reduction in gun voltage. Compared with PA12 powder coatings, PA11 has a higher melting point, higher density, and higher bio-based carbon content; PA12 may offer lower water absorption. Compared with epoxy or polyester thermoset powders, the PA11 coating displays higher elongation and better impact resistance but lower crosslink density and lower hardness. The intended use is therefore functional protection of metal parts exposed to impact, abrasion, and automotive fluids rather than decorative topcoat hardness.
Regulatory documentation should be requested for the specific lot. Arkema PA11 products are generally accompanied by REACH registration and RoHS 2011/65/EU declarations; the end user must verify compliance with Directive (EU) 2015/863 when applicable. Food-contact use is possible only when the specific grade and application conditions are covered under 21 CFR 175.300 or Regulation (EU) No 10/2011 and when the brown pigment package is approved by the supplier. Electrical insulation claims require breakdown voltage testing on the finished coated article per IEC 60243-1 because film thickness and porosity determine the result.
