| HS Code | 508545 |
| Material | Polyamide 11 (PA11) |
| Color | Blue |
| Physical Form | Fine powder |
| Melting Point | 186 °C |
| Density | 1.03 g/cm³ |
| Bulk Density | 0.45 g/cm³ |
| Tensile Modulus | 1700 MPa |
| Tensile Strength | 48 MPa |
| Elongation At Break | 45% |
| Charpy Impact Strength Notched | 4 kJ/m² |
| Hardness | 75 Shore D |
| Particle Size D10 | 10 µm |
| Particle Size D50 | 15 µm |
| Particle Size D90 | 25 µm |
| Water Absorption | 1.8% |
As an accredited Arkema Rilsan Fine Powders 5229 BLUE RDP 15-10 FB PA11 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg bag of Arkema Rilsan Fine Powders 5229 BLUE RDP 15-10 FB PA11, blue polyamide powder for industrial coating applications. |
| Container Loading (20′ FCL) | Container loading for 20′ FCL: Arkema Rilsan Fine Powders 5229 BLUE RDP 15-10 FB PA11 requires secure, ventilated packing, avoiding moisture and heat. |
| Shipping | Ship as non-hazardous chemical powder in sealed polyethylene-lined multi-wall paper bags or FIBCs on pallets. Protect from moisture and damage. Avoid ignition sources, static discharge, and high temperatures. Not regulated as dangerous goods for ground, sea, or air under normal conditions, but handle with dust-control measures. |
| Storage | Store Rilsan Fine Powder 5229 BLUE in its original, tightly sealed container in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and excessive heat or ignition sources. Keep away from oxidizing materials. Maintain moderate temperatures to preserve flow and performance. Use within recommended shelf life, avoiding prolonged storage after opening. |
| Shelf Life | Shelf life: 2 years when stored unopened in original packaging in a cool, dry place. |
Metal valve bodies and centrifugal pump volutes for industrial water handling are coated with Rilsan Fine Powders 5229 Blue RDP 15-10 FB PA11 as a fused corrosion barrier. The powder is applied after degreasing and grit blasting to a surface profile of 40–75 µm per ISO 8503-2. Carbon steel parts are preheated in a convection oven at 330–350°C until the surface reaches 280–300°C measured by contact thermocouple. The part is dipped in an air-fluidized bed for 3–8 s. Film thickness after fusion is 250–400 µm per ISO 2177. Post-fusion oven dwell at 190–200°C for 2–3 min develops sufficient crystallinity. Typical terminal parts are ball valves from 1/2 in. to 6 in. nominal bore, check valve discs, and pump volutes exposed to neutral and mildly acidic aqueous media. Adhesion is verified by cross-cut tape pull per ASTM D3359-17 Method B with a 5B rating before salt fog exposure. The dominant production-line defect is edge pull-back at sharp machined shoulders. It occurs when the substrate preheat drops below 270°C. Edge radius of 1.5 mm or greater and an additional 10–15°C of preheat restore coverage. Strong oxidizing acids and phenolic process streams are outside the recommended service envelope for this coating.
Domestic dishwasher baskets and cutlery holders are processed by electrostatic spray deposition of Rilsan 5229 Blue at 60–80 kV negative polarity. Steel wire is phosphate-treated before coating. The powder is sprayed to a pre-fused film of 200–300 µm at 20–25°C and 45–55% relative humidity. Lower humidity raises transfer efficiency but slows electrostatic decay in recessed wire junctions. Higher humidity promotes back-ionization on rack corners. Oven fusion at 200–210°C for 8–12 min produces a continuous PA11 film with no visible pinholes at 2.0× magnification. Coated wirework is tested under ISO 9227 neutral salt spray for 500 h with scribe creep below 3 mm. Powder consumption on automated reciprocator lines averages 1.6–2.2 kg per standard 12-place dishwasher rack when reclaim is blended at 20–30 wt% with virgin powder. Reclaim above 35 wt% increases orange peel because of fine particle enrichment. Food-contact status is not automatic. EU Regulation 10/2011 compliance and FDA 21 CFR 177.1500 status require a written migration validation for this specific blue grade because pigment additives must be assessed case-by-case.
Steel brake line tubes and fuel filler neck tubes are coated with Rilsan 5229 Blue as a stone-impact and de-icing salt barrier. The tube is drawn, zinc-flashed, and silane-sealed before coating. The substrate is preheated to 250–280°C and sprayed electrostatically at 50–70 kV. A single pass deposits 120–180 µm of PA11 after cure at 200°C for 5 min. Zinc chloride immersion is performed for 200 h using OEM-specific test methods such as VDA 230-214 or an equivalent cyclic chloride protocol. No delamination is permissible at a scribe. Burst testing of coated tube assemblies follows SAE J1047 and ISO 4038 where applicable. The main bottleneck on high-volume tube coating lines is circumferential film thickness variation. Faraday shielding at the far side produces a variation of ±20 µm at the tube back surface. Radial electrostatic deflectors or rotating tube transport reduce this effect. Published data for this specific blue RDP 15-10 FB grade in original equipment automotive fuel contact is limited; supplier validation is conducted at the Tier-1 level and is not generally disclosed in public literature.
| Processing route | Substrate preheat or surface condition | Nominal film thickness | Key standard | Primary process risk |
|---|---|---|---|---|
| Air-fluidized bed dip | 280–300°C surface | 250–400 µm | ISO 2177 | Edge pull-back below 270°C |
| Electrostatic spray on cold substrate | 20–28°C | 120–300 µm | ISO 9227 | Back-ionization and Faraday shielding |
| Electrostatic spray on hot substrate | 250–280°C | 120–180 µm | VDA 230-214 | Circumferential variation of ±20 µm |
| Biaxial rotolining | 280–300°C | 2–4 mm | ISO 16101 | Steam bubbles above 0.15 wt% moisture |
Marine deck hardware and stainless steel fasteners are coated with Rilsan 5229 Blue for electrolytic isolation and salt-spray resistance. Stainless steel substrates require a two-coat system. A thin silane or epoxy primer is applied at 5–15 µm. The PA11 topcoat is deposited at 180–250 µm by electrostatic spray at 60–75 kV and 22–28°C substrate temperature. Fusion is performed at 200–210°C for 5–7 min. The primer compensates for the low surface energy of PA11 on passivated stainless steel and reduces cathodic disbondment under ISO 15711. Coated cleats, hinges, and bimini fittings are tested for 1,000 h in neutral salt spray under ISO 9227 with no red rust at the scribe. Maximum continuous service temperature for the PA11 topcoat is 80°C in dry marine environments. Above this temperature, hardness and impact resistance decline. Field failure is usually localized at threaded areas where coating thickness falls below 120 µm. Thread masking rather than heavy build-up is used before assembly.
Small-bore chemical storage vessels and dosing tanks are made by biaxial rotolining with Rilsan 5229 Blue. The steel vessel is preheated to 280–300°C. Powder is charged and the vessel is rotated at a 4:1 rotation ratio for 10–15 min. Wall thickness after multiple layers is 2–4 mm. PA11 density is approximately 1.04 g/cm³ per ISO 1183-1, and the crystalline melting point is 183–187°C by ISO 11357-3. The blue pigment may lower melt flow index slightly compared with natural PA11 powder. Melt flow rate measured at 235°C and 2.16 kg per ISO 1133-1 is typically 5–9 g/10 min for PA11 fine powder. The blue grade may trend toward the lower end of that range. Lined vessels are tested hydrostatically per ISO 16101 and by holiday detection at 5 kV/mm. Concentrated sulfuric acid above 30 wt%, strong oxidizing agents, and phenols are incompatible. Moisture above 0.15 wt% generates steam bubbles during fusion. Pre-drying at 80°C for 4 h in a desiccant dryer at −40°C dew point is required when storage relative humidity exceeds 60%.
| Property or test | Reference method | Application area | Acceptance criterion |
|---|---|---|---|
| Cross-cut adhesion | ASTM D3359-17 Method B | Valve and pump bodies | 5B |
| Pull-off adhesion | ISO 4624 | Electrical connector shells | 8–12 MPa on blasted aluminum |
| Neutral salt spray | ISO 9227 | Marine hardware | 1,000 h no red rust at scribe |
| Dielectric strength | IEC 60243-1 | Electrical connector shells | 25–35 kV/mm |
| Melt flow rate | ISO 1133-1 | Rotolined vessels | 5–9 g/10 min at 235°C/2.16 kg |
| Food contact migration | EU 10/2011, FDA 21 CFR 177.1500 | Dishwasher rack wirework | Case-by-case written validation |
Low-voltage electrical connector shells and cable glands are coated with PA11 as an insulating outer layer over brass and aluminum substrates. The powder is applied by electrostatic cloud or tribo gun. Coating thickness is 150–250 µm. Dielectric strength per IEC 60243-1 is 25–35 kV/mm for unfilled PA11. Blue pigmentation may lower the measured value. Pull-off adhesion per ISO 4624 using a 20 mm dolly commonly reaches 8–12 MPa on blasted aluminum. The main processing limitation is heat deflection. PA11 begins to soften around 145–150°C per ISO 75-2/B. Soldering adjacent to coated connector bodies requires thermal shielding. This application is established in railway and marine electrical junction enclosures. Electrical equipment supplied in the European Union must be assessed under Directive 2011/65/EU Annex II for restricted substances in pigments and stabilizers.
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Arkema Rilsan Fine Powders 5229 BLUE RDP 15-10 FB PA11 is a blue-pigmented polyamide 11 fine powder supplied for dry application to metallic substrates. The polymer backbone is synthesized from 11-aminoundecanoic acid, which is obtained from castor oil; the resulting semicrystalline polyamide 11 has a renewable carbon content above 90% when tested to ASTM D6866-21. The grade suffix RDP 15-10 FB identifies a ready-to-process blue PA11 powder with controlled particle-size distribution for electrostatic spray and fine fluidised-bed deposition. Published data for this specific pigment and lot combination is limited, and the current Arkema technical data sheet must be consulted for D10, D50, and D90 values. The product family is characterized by a density of 1.03–1.05 g/cm³ to ISO 1183-1, a melting endotherm near 183–189 °C to ISO 11357-3, and Shore D hardness of 70–78 to ISO 868 in fused films. Saturation moisture uptake to ISO 62 is approximately 1.8% by mass, which is higher than PA12 but lower than PA6 and PA66 at comparable immersion times.
Because PA11 is a thermoplastic, film formation does not involve a cure reaction. The powder melts, coalesces, and solidifies on cooling; this distinguishes the product from epoxy and polyester thermoset powders used in the same metal-coating sector. The blue pigmentation provides opacity and identification in finished components, but it may alter powder flow, melt viscosity, and accelerated weathering compared with the natural resin. The PA11 base also limits volatile organic compound emissions during application because no liquid carrier is required.
Particle-size distribution controls electrostatic charge acceptance, aerodynamic transport, and fluidised-bed expansion. Production-scale corona guns operating at 60–80 kV deliver acceptable transfer efficiency when the fraction below 10 µm is limited; excessive fines below 5 µm increase overspray and reduce penetration into recessed areas. The RDP 15-10 FB designation represents a controlled cut, but lot-specific values must be taken from laser diffraction data reported to ISO 13320-1. In fluidised-bed operations, single-pass film thickness is typically managed from 250 µm to 400 µm; electrostatic spray after preheating can deposit 100–150 µm films. Production lines report that powder moisture and the recycled-to-virgin powder ratio shift the effective D50 by several micrometres, requiring adjustment of venturi settings and hopper agitation.
Tribo-charging guns are used on complex geometries because blue PA11 powder is insulating. Tribo systems generate less free-ion current than corona systems and reduce Faraday-cage deposition failures, but output is lower. Powder resistivity, charge decay, and particle size interact with ambient relative humidity; above 60% relative humidity, surface moisture on the powder dissipates charge too rapidly and transfer efficiency falls.
Substrate preparation on production lines comprises alkaline degreasing, rinsing, grit blasting to Sa 2½ under ISO 8501-1, and application of a polyamide-compatible primer. Steel parts are preheated to 240–280 °C before powder application; after depositing the blue powder, residual heat melts and fuses the layer, or a short post-heat oven at 200–220 °C for 3–5 min is used. These temperatures bracket the ISO 11357-3 melting endotherm of PA11 and allow coalescence without crosslinking. Adhesion is commonly verified by cross-cut testing to ASTM D3359; zinc phosphate conversion coatings in the range 1.5–3.0 g/m² improve bond strength when paired with the correct primer. Degreasing alone is generally insufficient for long-term corrosion resistance on grit-blasted steel.
Ovens used for preheat and post-heat should maintain temperature uniformity within ±10 °C. Incorrect preheat temperature produces film defects: insufficient heat leaves unmelted powder at the metal interface, while excessive heat can degrade the organic primer and produce discoloration. The working envelope in a given plant is normally established by differential scanning calorimetry of the powder and by first-run adhesion trials on the production line.
| Process parameter | Electrostatic spray | Fluidised-bed dipping |
|---|---|---|
| Substrate preheat | 240–280 °C | 260–320 °C |
| Post-heat temperature | 200–220 °C | 200–220 °C |
| Post-heat time | 3–5 min | 3–8 min |
| Maximum powder moisture | 0.2% by mass | 0.2% by mass |
| Reclaimed powder addition | ≤30% | ≤20% |
Polyamide 11 is used in dishwasher baskets and water-treatment components because its amide concentration is lower than PA6 or PA66. The material withstands immersion in 5% sodium hydroxide at 60 °C for 1000 h in typical industrial evaluations, but strong acids, phenol, and formic acid are incompatible. Specifications for these applications often reference ASTM D543 for chemical immersion and ASTM D870 for water immersion. The blue pigment does not materially change the base chemical resistance; however, pigment loading can slightly increase melt viscosity and may influence weathering. When food-contact use is required, the relevant regulation is FDA 21 CFR 177.1500 for nylon resins or 21 CFR 175.300 for resinous coatings, but the pigmented variant must be confirmed by Arkema for the specific formulation.
For potable-water contact, the applicable test protocol may include migration testing under EN 12873-1 or national hygiene approvals. These approvals are formulation-specific and cannot be assumed for a blue PA11 grade unless Arkema has been requested to provide documented compliance for the exact product designation.
Selection between PA11 and PA12 coating powders usually involves melting point, moisture response, and renewable-carbon content. PA11 exhibits a higher melting point and higher abrasion resistance but slightly higher saturation moisture uptake than PA12. Compared with epoxy or polyester thermoset powder coatings, PA11 is thermoplastic and does not require a stoichiometric hardener or cure window. Film formation proceeds by melting and coalescence; local damage can be thermally repaired, and unmelted overspray is recoverable. The lack of a crosslinked network lowers solvent resistance and hardness relative to epoxy but increases elongation and repairability. The table below summarizes comparative ranges; exact values for 5229 BLUE RDP 15-10 FB should be confirmed from the current datasheet.
| Property | Test method | PA11 fine powder class | PA12 coating powder reference | Epoxy thermoset powder reference |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.03–1.05 g/cm³ | 1.01–1.03 g/cm³ | 1.20–1.40 g/cm³ |
| Melting or cure range | ISO 11357-3 | 183–189 °C | 172–180 °C | 140–200 °C cure |
| Shore D hardness | ISO 868 | 70–78 | 65–75 | 80–90 |
| Saturation water absorption | ISO 62 | 1.8–2.0% | 1.4–1.6% | 0.5–1.5% |
| Film formation mechanism | Not applicable | Thermoplastic coalescence | Thermoplastic coalescence | Crosslinking |
| Renewable carbon content | ASTM D6866-21 | >90% | 0% | 0% |
Within the Rilsan Fine Powders range, the blue 5229 variant differs from natural and black grades by pigment loading and particle-size cut. Natural grades are often selected when optical neutrality or lower melt viscosity is required; black grades may be used for ultraviolet resistance or aesthetic requirements. The blue grade should not be substituted into an existing qualified coating system solely on the basis of the same polyamide 11 base because pigment loading changes powder charging, melt flow, and final adhesion after thermal cycling.
Polyamide 11 powder is hygroscopic. If stored above 60% relative humidity, surface moisture can reduce electrostatic charge acceptance and produce pinholes during fusion. Pre-drying at 80 °C for 4 h in a desiccant dryer with a dew point below −40 °C is a standard recovery procedure for polyamide powders exposed to uncontrolled humidity. Moisture content above 0.2% by mass should be avoided before application. After drying, the powder should be consumed within the shift or held in closed containers under dry air. Recycled powder recovered from the booth should be blended with virgin material at a controlled ratio and re-dried before return to the feed hopper.
Powder that has been wetted or exposed to condensation cannot be restored by simple surface drying if moisture has advanced into the polyamide particles; such material may display microvoiding after fusion. In these cases the material should be quarantined and tested by loss-on-weight methods before release.
Fused PA11 films are specified for sliding wear and impact-prone assemblies because the polyamide retains ductility below 0 °C. Typical unfilled PA11 materials exhibit tensile yield stress in the range 35–45 MPa by ISO 527-2 and elongation at break above 200%. Taber abrasion testing to ASTM D4060 is commonly used for comparative purchasing specifications; published values for 5229 BLUE RDP 15-10 FB should be taken from Arkema’s current data, with CS-17 wheels and load parameters stated on the purchase specification. Because the film is thermoplastic, scratch damage can be repaired by local reheating to 200–220 °C; thermoset epoxy films with comparable damage usually require stripping and recoating.
Low-temperature impact is another differentiator in specifications. PA11 coating films are generally evaluated by falling-dart impact according to ASTM D2794 or ISO 6272-1; values depend strongly on substrate thickness and primer, so direct comparison between suppliers requires identical preparation and reporting of failure mode.
Regulatory status for the blue variant under REACH, RoHS, and the ATEX Directive 2014/34/EU should be verified in the Arkema safety data sheet and supplied declaration. Fine organic powders form combustible dust clouds; dust extraction, earthing, and explosion protection systems are required during bulk handling. Airborne concentration should remain below the applicable occupational exposure limit for organic nuisance dust. In applications involving food-contact or potable-water contact, the specific pigmented grade must be confirmed against FDA 21 CFR 177.1500, 21 CFR 175.300, or the relevant national approximation before use. The product is not supplied as a self-priming coating; adhesion to untreated steel and aluminium is insufficient for most service environments. Substitution of this blue grade for natural or black PA11 grades should trigger re-qualification because pigment loading and particle-size distribution can shift process windows.
