| HS Code | 555630 |
| Product Name | E06 PA RDP |
| Product Type | Redispersible Polymer Powder |
| Chemical Base | Vinyl acetate-ethylene (VAE) copolymer |
| Physical Form | Spray-dried free-flowing powder |
| Color | White to off-white |
| Bulk Density | 450-550 g/L |
| Residual Moisture | ≤1.0% |
| Particle Size | >95% through 400 µm sieve |
| Ph 10 Percent Dispersion | 6.0-8.0 |
| Minimum Film Forming Temperature | ~0°C |
| Glass Transition Temperature | ~-5°C |
| Shelf Life | 12 months in original unopened packaging |
As an accredited E06 PA RDP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | E06 PA RDP is supplied in sealed 25 kg multi-layer paper bags with PE liner, ensuring safe containment. |
| Container Loading (20′ FCL) | E06 PA RDP is loaded as a 20′ FCL, palletized, secured, and stowed safely for chemical transport. |
| Shipping | E06 PA RDP is a redispersible polymer powder supplied in sealed multi-layer paper bags with PE liners. Keep dry and avoid moisture during transport. It is non-hazardous under normal conditions, but handle with care to prevent dust exposure. Store in a cool, ventilated area. |
| Storage | Store E06 PA RDP in a cool, dry, well-ventilated area, away from direct sunlight, moisture, and heat sources. Keep the original container tightly sealed when not in use. Avoid exposure to frost and temperatures above 30°C. Ensure storage area is clean and free from ignition sources. Use within shelf life. |
| Shelf Life | Shelf life for E06 PA RDP is 12 months from manufacture date when stored unopened in original packaging under cool, dry conditions. |
Thin-wall PC/ABS enclosure compounds specified under IEC 62368-1:2018 clause 6.4 represent the highest-volume downstream use for resorcinol bis(diphenyl phosphate) (RDP). At enclosure wall thickness from 0.8 mm to 1.5 mm, RDP is incorporated at 8 wt% to 14 wt% of total compound mass, with the exact level determined by polycarbonate-to-ABS ratio, graft-rubber content, and anti-dripping package. The phosphate ester suppresses ignition by releasing polyphosphoric acid during thermal decomposition, which reacts with the polycarbonate-rich surface to form a crosslinked char barrier. Injection moulding requires a screw with 25:1 to 30:1 L/D, a shut-off nozzle, and front-zone barrel temperatures held between 240°C and 255°C; higher local melt temperatures cause phenyl phosphate volatilisation, mould vent residue, and splay on black-textured surfaces. Pre-drying at 85°C for 3 h to residual moisture below 0.02 wt% is mandatory because hydrolysed RDP increases weld-line failure risk. Finished parts are qualified under UL 94 V-0 at 1.5 mm, IEC 60695-2-12 glow-wire at 850°C for unattended appliance categories, and IEC 62368-1:2018 fire enclosure requirements. Mechanical trade-off data across the loading window show notched Izod impact strength falling from approximately 45 kJ/m² at 8 wt% to 30 kJ/m² at 14 wt%, while tensile yield strength measured under ISO 527-2:2012 declines by 4 MPa to 7 MPa over the same interval. Because RDP contains no brominated diphenyl ethers, the compound remains outside the restricted substance limits of RoHS 2011/65/EU Annex II and is screened for REACH SVHC compliance. Typical terminal articles include router covers, laptop base enclosures, set-top box frames, monitor bezels, and small appliance control housings.
Representative ranges compiled from PC/ABS supplier technical literature are shown below; actual values depend on graft-rubber content, polycarbonate molecular weight, and mould surface geometry.
| RDP loading in PC/ABS (wt%) | Specimen thickness (mm) | Flammability result | Tensile yield (MPa, ISO 527-2:2012) | Notched Izod (kJ/m², ISO 180:2019) |
|---|---|---|---|---|
| 8 | 1.5 | UL 94 V-0 | 52–54 | 43–46 |
| 10 | 1.2 | UL 94 V-0 | 49–51 | 39–42 |
| 12 | 1.0 | UL 94 V-0 | 47–49 | 35–38 |
| 14 | 0.8 | UL 94 V-0, anti-dripping agent required | 44–47 | 30–33 |
Modified polyphenylene ether/high-impact polystyrene blends used in AC wallbox housings and photovoltaic combiner boxes are formulated with RDP at 10 phr to 18 phr relative to the PPE/HIPS resin mass. The flame-retardant action is amplified by the inherent char formation of PPE; RDP plasticises the styrenic phase and promotes intumescent residue during cone calorimetry under ISO 5660-1:2015. The upper loading boundary is set by processing behaviour: at 18 phr, the melt volume-flow rate measured under ISO 1133-1:2022 at 280°C/5 kg increases sharply, leading to sink marks around mounting bosses and dimensional drift after demoulding. Twin-screw compounding on a co-rotating 40:1 L/D extruder with barrel temperatures between 260°C and 280°C is preferred; atmospheric venting is used in the first vent zone, and vacuum is applied only after the phosphate has dispersed into the melt to limit vapour loss. Flame requirements in this segment are dominated by IEC 60695-2-11 glow-wire testing at 960°C on final wall thicknesses above 0.75 mm, supplemented by UL 94 V-0 at 1.5 mm and tracking index testing under IEC 60112:2020. Because RDP contains 10.8 wt% phosphorus, a total phosphorus concentration of 1.1 wt% in the compound requires roughly 10 wt% of the additive; this is the minimum design value for electrical enclosures with elevated unpermitted voltage. Heat-ageing data at 110°C for 1000 h in high-RDP PPE/HIPS compounds are limited; OEM qualification programmes therefore add impact retention and mandrel bend checks before series release. Formulators avoid combining RDP with amine-based light stabilisers because acidic phosphate hydrolysis products can deactivate hindered amine stabilisers and accelerate yellowing after long oven ageing. Terminal articles include wallbox housings, battery management system enclosures, photovoltaic combiner boxes, and internal busbar insulators.
PBT/PC blends for automotive and appliance connectors are a separate RDP application where the additive must satisfy two electrical safety parameters simultaneously: comparative tracking index under IEC 60112:2020 and glow-wire ignition temperature under IEC 60695-2-13:2021. RDP is added at 6 wt% to 12 wt%; the polycarbonate fraction in a 30/70 or 50/50 PBT/PC blend influences char morphology, while the PBT phase controls crystallisation after moulding. A processing conflict arises because PBT requires melt temperatures between 245°C and 260°C, but excessive barrel residence time at this temperature can volatilise the diphenyl phosphate species from RDP and deposit on the cavity surface. Injection moulds for these connectors require vent depths of 0.015 mm to 0.020 mm on the parting line and polished ejector pins to reduce plate-out during long production runs. RDP reduces the melt viscosity of PBT/PC, improving fill of thin connector walls but increasing the risk of flash in multi-cavity tools with clamp forces below 1200 kN. Compliance is assessed by UL 94 V-0 at 0.8 mm and IEC 60112:2020 tracking index values above 600 V for reinforced insulating parts. End products include automotive ECU connectors, appliance terminal blocks, and relay bases.
| Downstream segment | Primary flammability standard | Secondary electrical/mechanical standard | Typical RDP loading range | Critical limitation |
|---|---|---|---|---|
| PC/ABS thin-wall enclosures | UL 94 V-0 at 1.5 mm | IEC 62368-1:2018 clause 6.4 | 8–14 wt% | Notched Izod reduction |
| PPE/HIPS charging infrastructure | IEC 60695-2-11 at 960°C | UL 94 V-0 at 1.5 mm; IEC 60112:2020 | 10–18 phr | Sink marks above 18 phr |
| PBT/PC connectors | UL 94 V-0 at 0.8 mm | IEC 60112:2020 CTI > 600 V | 6–12 wt% | Vent plate-out |
| TPU cable sheathing | IEC 60332-1-2:2015 | UL VW-1; ISO 4589-2:2017 | 5–12 wt% | Migration to polycarbonate connectors |
Polyether-based TPU compounds for USB-C cable jackets and robot dress-pack cables use RDP at 5 wt% to 12 wt% on total polymer. RDP lowers Shore A hardness by 3–5 points; therefore the base resin is selected from 85 Shore A to 95 Shore A grades to maintain final jacket hardness above 80 Shore A. In single-screw extrusion of thin-wall cable sheathing, a 30:1 L/D screw with a five-zone barrel profile from 170°C to 195°C is used; die temperatures above 200°C increase phosphate ester volatilisation and die-lip deposit formation. Vertical flame performance is determined by IEC 60332-1-2:2015, with supplementary smoke density measurement under ASTM D2843. RDP-modified TPU can reach VW-1 ratings at 0.5 mm wall thickness when an anti-dripping additive is included; without the anti-dripping package, vertical burn tests typically show flaming drip that transfers ignition to the cotton indicator. Limiting oxygen index measured under ISO 4589-2:2017 shifts from approximately 25% O₂ for unfilled TPU to 28–30% O₂ at 10 wt% RDP. Because RDP is a liquid aromatic phosphate, migration into polycarbonate connectors must be screened after 7 days at 70°C using visual assessment under ISO 105-A02; this is a known incompatibility in mixed-material cable assemblies. Terminal products include medical device interconnects, USB-C charging cables, industrial robotic dress packs, and data centre server power cords.
In halogen-free epoxy potting compounds for low-voltage power modules, RDP is incorporated at 10 wt% to 20 wt% on resin weight when the cured glass transition temperature requirement remains below 140°C. The additive is dispersed in the bisphenol A epoxy resin phase before hardener addition under high shear to avoid localised phosphate-rich domains that reduce hardness after cure. The principal process limitation is viscosity: RDP at 25°C has a dynamic viscosity of 4.0 Pa·s to 7.0 Pa·s, which raises mixed-system viscosity and alters vacuum degassing time. Cure schedules of 2 h at 100°C followed by 4 h at 130°C are common; post-cure above 150°C is not recommended because the phosphate ester can hydrolyse in the presence of anhydride hardeners and reduce crosslink density. Flame compliance is demonstrated under UL 94 V-0 at 3.0 mm and glow-wire testing under IEC 60695-2-12 at 750°C. End articles include LED driver modules, small power supply encapsulants, and terminal block potting seals. Published data on thermal shock performance in RDP-modified epoxy under IEC 60068-2-14 is limited; qualification programmes typically use 500 cycles from -40°C to 105°C with dielectric strength verification under IEC 60243-1.
Polycarbonate/acrylonitrile-styrene-acrylate blends used in outdoor camera housings, antenna radomes, and electrical cabinets are formulated with RDP at 7 wt% to 13 wt% to achieve UL 94 V-0 at 1.5 mm while retaining UV resistance. The ASA component contributes weatherability, but the presence of RDP increases surface migration of phosphate species after thermal cycling; this can reduce paint adhesion and promote gloss change under ISO 4892-2:2013 xenon-arc exposure. Moulding parameters are similar to PC/ABS, with barrel temperatures between 235°C and 250°C, but a lower front-zone temperature is required because ASA has a narrower processing window. Drying at 80°C for 3 h to below 0.02 wt% moisture is specified; failure to dry causes silver streaks near gates and a measurable drop in weld-line strength. Phosphate migration is assessed by cleaning and contact-angle measurement after 72 h at 80°C under OEM-specific methods. End products include outdoor IP camera housings, antenna radomes, photovoltaic junction boxes, and weatherproof electrical enclosures.
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E06 PA RDP is a spray-dried redispersible polymer powder based on a polyacrylic ester copolymer. The PA portion of the designation identifies the polymer backbone as polyacrylate rather than vinyl acetate-ethylene or styrene-butadiene rubber. The product is supplied as a free-flowing powder containing a protective colloid and a mineral anti-caking agent. When incorporated into cementitious, gypsum, or blended-binder dry-mix systems, the powder redisperses under mechanical mixing, and the polymer particles coalesce during water loss to form a continuous film across capillary pores and aggregate-paste interfaces. This film increases tensile adhesion, flexural toughness, and resistance to microcracking in the cured mortar.
E06 PA RDP is used in factory-produced tile adhesives, repair mortars, self-leveling underlayments, waterproofing slurries, and exterior insulation and finishing systems. The effective addition level is not a fixed product constant; formulators typically screen between 1.5 wt% and 5.0 wt% of total dry batch depending on cement type, sand grading, and the required EN 12004 classification. In production-scale ribbon blenders of 1,000 L working volume, the powder is generally introduced after the coarse silica sand to reduce localized polymer accumulation. Dry blending for 120 s followed by 180 s of wet mixing at a tip speed above 1.5 m/s has been reported to produce acceptable dispersion in ordinary Portland cement–based formulations. Operators also report that storage at relative humidity above 60% RH without resealing can create surface lumps that fail to redisperse completely under standard mortar mixing.
In hydrating cementitious systems, the pore solution pH can exceed 13. Vinyl acetate-ethylene copolymers may undergo ester hydrolysis under prolonged wet-cure conditions, releasing acetic acid and reducing film cohesion. Polyacrylic ester polymers are selected for their lower saponification rate under alkaline conditions. E06 PA is therefore positioned for wet-cured mortars and water-immersed adhesive applications where long-term alkaline exposure would otherwise soften the polymer network. In adhesion tests conducted according to EN 1348, C2 tile adhesives based on acrylic powders commonly retain a higher fraction of initial tensile adhesion after 21 d water immersion than comparable VAE formulations at equal polymer solids. The absolute retention is formulation-specific; published data for this specific E06 PA configuration is limited, so batch-specific screening remains necessary.
The carboxylic acid functionality on the polyacrylate chain participates in calcium ion complexation during early cement hydration. This interaction can increase paste viscosity and reduce over-flocculation, but it may also retard setting at higher polymer loadings. At addition levels above 4.0 wt%, E06 PA may delay initial set by 30 min to 90 min in CEM I 52.5 R systems because of adsorption onto aluminate surfaces. This is not a universal defect; it is an operational boundary that can be managed through accelerator adjustment or the use of low-alkali cement.
In cementitious tile adhesives, E06 PA is used to support C2TE performance under EN 12004 and ISO 13007-1. C2TE classification requires an initial tensile adhesion strength of at least 1.0 MPa, with equivalent minimum values after water immersion, heat ageing, and freeze-thaw cycling when tested by EN 1348. Extended open time of 30 min requires not less than 0.5 MPa. The polyacrylate powder contributes to these thresholds by increasing cohesion and improving substrate wetting, but it does not act alone. The slip resistance parameter T is influenced primarily by cellulose ether rheology, particle packing, and aggregate angularity rather than by the polymer chemistry alone.
For self-leveling underlayments, E06 PA reduces segregation and surface crusting while improving flexural strength measured by ASTM C348. The dry-mix typically contains Portland cement, calcium aluminate cement, calcium sulfate, polycarboxylate superplasticizers, and fine silica sand. E06 PA addition between 2.0 wt% and 4.0 wt% supports cohesive flow, but air entrainment should be managed with a separate defoamer. In a 20 mm pour, powder dosage alone does not prevent surface blisters; defoamer selection and mixing shear are the controlling factors.
The powder is hygroscopic and should be stored in closed silos with a controlled air supply. Pneumatic conveying velocity below 20 m/s reduces impact fusion and electrostatic wall build-up in similar polymer powders. In continuous weighing, E06 PA is dispensed through vibratory feeders, and flow consistency is controlled by accepting only the batch certificate values for bulk density and sieve residue. If the powder is added too early with fine fillers, localized polymer-rich agglomerates can form and may not redisperse under low-shear truck mixing. Production-scale field observations indicate that adding E06 PA after the coarse sand but before cellulose ether improves dispersion without excessive fines loss.
At relative humidity above 60%, open powder bags should be consumed within 24 h or transferred to sealed containers with desiccant. Moisture adsorption increases sieve residue and reduces flowability, causing dosing errors in gravimetric batch hoppers. Pre-drying at 40 °C for a maximum of 4 h may restore flowability. Higher drying temperatures should be avoided because they can initiate blocking of the protective colloid. Compatibility with amine-based accelerators should also be confirmed before batching; premature stiffening caused by polymer-amine interaction may be mistaken for flash setting in field conditions.
For redispersion evaluation, a common laboratory procedure disperses 100 g of powder in 300 mL of water at 20 °C under mechanical shear and passes the resulting dispersion through a 125 µm screen. The retained residue should be negligible if the powder has not been exposed to moisture. Viscosity of the redispersion can be measured using a Brookfield viscometer, but the value is not a specification for tile adhesive performance and should not be used for batch acceptance without a defined testing protocol.
In waterproofing slurries exposed to sulfate-rich groundwater or seawater mixing, E06 PA provides lower water uptake than VAE films at equal polymer volume fraction. Specimens tested according to ASTM D638-14 or ISO 178 frequently show that acrylic-modified cementitious films exhibit higher elongation but lower low-temperature impact resistance than VAE-modified systems. The selection therefore depends on whether the service condition requires deformation capacity or low-temperature toughness. Polyacrylate RDPs generally possess a glass transition temperature below 0 °C, which permits film formation without an external coalescing agent at application temperatures above 5 °C.
Polyacrylate films resist saponification and are less likely to lose film integrity under sulfate and carbonate exposure. They may, however, show higher tack and lower cured-film hardness than VAE. In two-component systems that must bridge cracks, E06 PA is dry-blended into the cementitious component before the liquid polymer is added. The powder contributes to the fine aggregate matrix, while the liquid resin supplies additional film continuity. In commercial waterproofing systems tested by EN 14891, crack-bridging values from 0.2 mm to 0.5 mm at −10 °C have been reported for acrylic-modified formulations, but published data for this specific configuration is limited. Systems must be validated for the intended crack width and water exposure class.
Compared with VAE powders, E06 PA typically requires a slightly higher defoamer dosage because polyacrylate films stabilize small air bubbles in high-shear mixing. This is managed by adding a mineral oil or silicone defoamer at 0.05 wt% to 0.20 wt% of the dry mix. Compared with SBR latex, the redispersible powder provides one-component packaging, lower shipping weight, and reduced freeze-thaw storage risk. Compared with VAE, the acrylic grade offers improved resistance to ultraviolet exposure in thin skim coats and external thermal insulation composite systems, but it does not automatically deliver higher wet shear adhesion on porcelain tile.
The polymer film also reduces chloride ion diffusion in the cement matrix, but the reduction becomes significant only above 4.0 wt% addition. Below this level, capillary absorption remains dominated by cement paste porosity. E06 PA is therefore specified with silica fume or metakaolin to densify the interfacial transition zone in marine repair mortars. The use of polymer without supplementary cementitious materials does not guarantee increased chloride resistance.
For dry-mix plant acceptance, the critical powder parameters are bulk density, residue on 125 µm or 250 µm, moisture content, ash content, and minimum film formation temperature. The following ranges are representative of polyacrylate and VAE redispersible powder classes and should not be interpreted as batch-specific E06 PA values.
| Parameter | Method | Polyacrylate RDP class | VAE RDP class |
|---|---|---|---|
| Bulk density | ISO 60 | 350–650 g/L | 400–550 g/L |
| Residue above 125 µm | ISO 565 | ≤2.0% | ≤2.0% |
| Ash content | ISO 3451-1 | 8–12% | 10–14% |
| Minimum film formation temperature | ISO 2115 | ≤5 °C | 0–8 °C |
| pH at 10% dispersion | ISO 976 | 7–9 | 6–8 |
The ash content represents the non-polymeric protective colloid and anti-caking fractions and should not be treated as filler. Minimum film formation temperature below 5 °C permits film coalescence at lower ambient temperatures, but mortar open time is governed primarily by water retention from cellulose ethers and cement hydration rate. The glass transition temperature of polyacrylate RDPs, measured by ISO 11357-2, commonly falls between −15 °C and 0 °C, providing film flexibility without cold blocking when sufficient anti-caking agent is present.
In exterior insulation and finishing systems, E06 PA can be incorporated at 3.0 wt% to 5.0 wt% in the base coat adhesive to improve impact resistance and reduce microcracking after thermal cycling. The polymer film lowers the modulus of the cement-rich matrix and allows stress relaxation during freeze-thaw exposure. Historically, ETAG 004 has been used to guide impact and weather resistance in such systems. The powder alone does not confer exterior insulation system performance; the reinforcing mesh, base coat thickness, and finishing render also control crack control and impact resistance.
In repair mortars, E06 PA is selected where low water permeability and improved adhesion to concrete substrates are required. The powder improves flexural strength and reduces the elastic modulus of the repair layer, lowering the risk of restrained shrinkage cracking. Performance is typically evaluated by ASTM C1583 for pull-off adhesion and ASTM C157 for length change. When high substrate roughness and saturated surface-dry concrete are present, E06 PA improves the bond strength of thin overlays. The powder does not eliminate the need for proper surface preparation, curing, and substrate profiling.
The matrix below lists the test methods and minimum thresholds for C2TE classification under EN 12004 and ISO 13007-1. Actual results depend on the full formulation and are not implied by the powder alone.
| Property | Test method | C2TE threshold | Test condition |
|---|---|---|---|
| Tensile adhesion, initial | EN 1348 | ≥1.0 MPa | Standard cure |
| Tensile adhesion after water immersion | EN 1348 | ≥1.0 MPa | Water immersion |
| Tensile adhesion after heat ageing | EN 1348 | ≥1.0 MPa | Aged at 70 °C |
| Tensile adhesion after freeze-thaw cycling | EN 1348 | ≥1.0 MPa | Freeze-thaw cycles |
| Extended open time | EN 1348 | ≥0.5 MPa | Open time 30 min |
In comparative formulation work, E06 PA is evaluated against VAE powders by holding identical polymer solids and adjusting water to constant slump or flow. The acrylic grade often produces a smoother trowel finish and lower dusting, but these handling characteristics are not performance qualifications. Only tensile adhesion, shrinkage, water uptake, and deformation tests using the specified standards provide batch-relevant data. If the intended service condition includes continuous water immersion above 20 °C, the hydrolysis resistance of polyacrylate chemistry becomes the primary selection criterion. If the requirement is low-temperature crack bridging at −20 °C, a VAE or VAE/VeoVa grade may outperform a pure polyacrylate because of its lower elastic modulus under cold conditions.
