| HS Code | 714025 |
| Product Name | 5603 PB RDP |
| Product Code | 5603 PB RDP |
As an accredited 5603 PB RDP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 5603 PB RDP is supplied in 25 kg multilayer paper bags with polyethylene liner, palletized and wrapped. |
| Container Loading (20′ FCL) | 20′ FCL: 5603 PB RDP packed in sealed bags on pallets, shrink-wrapped, moisture-protected, loaded securely for safe transport. |
| Shipping | 5603 PB RDP is a blue pigment powder shipped in sealed plastic-lined bags inside sturdy fiber drums or on pallets. It is typically non-hazardous under normal transport conditions, but dust should be minimized. Keep dry, avoid ignition sources, and transport in standard covered road or sea containers with proper SDS documentation. |
| Storage | Store `5603 PB RDP` in its original, sealed container in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and extreme temperatures. Keep container tightly closed when not in use to prevent caking or degradation. Follow manufacturer guidelines; typical shelf life is six months to one year under proper conditions. |
| Shelf Life | The shelf life for 5603 PB RDP is typically 12 months from production date when stored unopened in a cool, dry place. |
Resorcinol bis(diphenyl phosphate), the active diester supplied under the 5603 PB RDP designation, is compounded into thin-wall PC/ABS blends for information technology equipment enclosures at 11–15 wt%. The liquid phosphate ester is gravimetrically metered through a heated injection lance downstream of the melt seal on a co-rotating twin-screw extruder with L/D 40:1; adding the ester in the main feed throat causes screw slip and stagnation in the first 5 barrel zones. Barrel temperatures are profiled from 230 °C in the feed section to 255–260 °C at the die plate. Sustained melt temperature above 280 °C hydrolyzes the resorcinol ester, releasing diphenyl phosphate and phenol that catalyze polycarbonate chain scission; the melt volume-flow rate measured per ISO 1133-1 at 260 °C/5 kg can rise by more than 20% within 10 min residence time, and black specks appear in thin-wall moldings. The terminal compound is conventionally modified with 0.3–0.5 wt% polytetrafluoroethylene anti-dripping agent to suppress flammable drips under IEC 60695-11-10. At 1.5 mm specimen thickness, 14 wt% loading achieves UL 94 V-0; at 10 wt% the same wall section remains V-1 or V-2. The mechanical penalty is quantifiable: notched Izod impact strength determined per ISO 180/A decreases by 20–30%, and tensile strength per ISO 527-2 decreases by 8–12% relative to an unmodified 70/30 PC/ABS control. Injection molders must pre-dry compounded pellets at 100 °C for 4 h to a residual moisture content below 0.02 wt%; higher moisture produces splay, delamination at weld lines, and accelerated hydrolysis in the barrel.
Because ABS rubber particle size, SAN composition, and anti-drip package influence combustion and impact response, the property values in Table 1 are a representative window rather than a product specification.
| Loading (wt%) | UL 94 vertical burn at 1.5 mm | LOI (%) ISO 4589-2 | Tensile strength (MPa) ISO 527-2 | Notched Izod (kJ/m²) ISO 180/A | HDT/A (°C) ISO 75-2 |
|---|---|---|---|---|---|
| 8 | V-2 | 26 | 52 | 35 | 105 |
| 11 | V-1 | 29 | 49 | 30 | 101 |
| 14 | V-0 | 32 | 46 | 26 | 96 |
| 17 | V-0 | 34 | 42 | 20 | 91 |
Polyphenylene oxide/high-impact polystyrene blends used in television back enclosures, display brackets, and network equipment housings are compounded with 12–18 phr 5603 PB RDP on a 44 mm co-rotating twin-screw extruder with 12 barrel zones and a vacuum vent at −0.06 to −0.08 MPa. The liquid is injected at barrel 6 to avoid viscosity reduction in the melting zone. Melt temperature is maintained at 255–270 °C. Above 270 °C, phenolic hydrolysis products from the ester condense on the die lip and redistribute to the mold surface, producing plate-out on polished cavity areas after 500–800 shots; the addition of 0.2 phr tris(2,4-di-tert-butylphenyl) phosphite and maintenance of the vacuum vent reduce the deposit rate. The diluted melt is injection molded at 70–90 °C mold temperature into 0.8–1.2 mm wall sections using a clamp force of 1,800 kN on a 250-tonne machine. Finished parts are tested for glow wire resistance at 750 °C per IEC 60695-2-12, and vertical burn per IEC 60695-11-10 at 1.2 mm; typical loading requires 14–16 phr to obtain UL 94 V-0 without dripping. Capillary rheometry at 260 °C and 1000 s⁻¹ per ISO 11443 shows an apparent shear viscosity reduction of 35–45% relative to the unmodified PPO/HIPS, which is the primary mechanism enabling thin-wall fill. The plasticization reduces HDT/A by 6–10 °C per ISO 75-2; high-heat PPO grades with a glass transition above 205 °C are commonly selected to compensate.
When the ester is metered into continuous polyether slabstock foam production for upholstered seating, the injection point is located in the polyol run tank or inflight polyol line upstream of the high-shear mixing head, because the product viscosity of 500–700 mPa·s at 25 °C permits blending without preheating in 3000–4000 molecular weight polyether polyols. Typical loading for furniture foam requiring cigarette, match, and small-open-flame resistance is 8–18 php. The terminal cushion must pass EN 1021-1 and EN 1021-2 or BS 5852 Part 1; RDP contributes both gas-phase phosphorus radical quenching and limited char stabilization. It also affects cell opening: the density rises by 2–5 kg/m³ unless the TDI index is increased by 2–4% to restore soft segment mobility. For automotive or contract seating, fogging condensate measured per ISO 6452 must remain below 2 mg; therefore a grade with free phenol below 0.1 wt% and triphenyl phosphate below 0.5 wt% is specified. A critical process threshold is observed with tin(II) octoate catalyst levels above 0.25 php: the phosphate ester coordinates the tin center, retarding gel reaction and causing collapse in box foam block heights above 1 m. On vertical foaming installations, cream time at 45 °C should be restored to 25 s or less by catalyst adjustment before the line reaches steady state.
The principal test matrix for polyether seating foam containing 5603 PB RDP is summarized in Table 2.
| Property | Test method | Typical pass criterion |
|---|---|---|
| Cigarette ignition resistance | EN 1021-1 / BS 5852 Part 1 | No ignition after 20 min |
| Flame propagation | EN 1021-2 / BS 5852 Part 1 | No progressive smoldering |
| Fogging | ISO 6452 / DIN 75201 | Condensate < 2 mg |
| Tensile strength | ISO 1798 | > 100 kPa |
| Compression set at 70 °C, 22 h | ISO 1856 | < 10% |
| Limited oxygen index | ISO 4589-2 | > 23% O₂ |
Copper-clad laminate varnishes based on bisphenol-A epoxy and dicyandiamide are modified with 15–25 phr 5603 PB RDP on resin solids when the finished 0.8–1.6 mm laminate must meet UL 94 V-0 without brominated FR-4 chemistry and with comparative tracking index above 600 V per IEC 60112. The phosphate ester is dissolved into the methyl ethyl ketone / propylene glycol monomethyl ether resin solution before hardener addition; resin solids are maintained at 55–60 wt%, and viscosity remains below 1000 mPa·s at 25 °C to satisfy glass-cloth impregnation through a comma coater running at 5–8 m/min. B-staging is performed at 130–160 °C for 3–5 min, with residual volatiles held below 0.5 wt% to prevent laminate voids. Press lamination proceeds at 190 °C and 2.5 MPa for 90–120 min, producing 1.6 mm thick cores for printed circuit boards in consumer electronics and power adapters. The phosphate ester acts primarily in the condensed phase by thermally stabilizing phosphate char; however, it plasticizes the crosslinked epoxy network and lowers the cured glass transition temperature from approximately 140 °C for dicyandiamide-cured epoxy to 115–125 °C. This caps continuous operating temperature in multi-layer board fabrication and can increase through-plane coefficient of thermal expansion; co-formulation with 15–25 phr aluminum hydroxide or treated magnesium hydroxide is used where IEC 60112 tracking index above 600 V is required because neat RDP can reduce surface resistance under humid condensation conditions.
In glass-fiber-filled PBT automotive relay housings and electrical connectors, 5603 PB RDP is incorporated at 10–16 wt% as a halogen-free ignition resistance modifier and melt-flow promoter. The liquid ester is metered before the glass fiber feed on a twin-screw extruder with 30 wt% short glass fiber, because early wetting of the PBT melt reduces fiber fracture and preserves a mean fiber length above 0.4 mm in the molded part. Barrel temperatures are held at 240–255 °C; melt temperature above 260 °C accelerates ester hydrolysis and produces acrid phenol odor at the die. Pellets are pre-dried in desiccant dryers at 120 °C for 4 h to 0.02 wt% moisture because moisture-induced degradation lowers volume resistivity per IEC 62631-3-1 and increases the risk of electrical tracking. The mold temperature is set at 80–100 °C for crystallization and dimensional stability of a 0.75 mm wall connector. Finished relay sockets and connector bodies must pass 750 °C glow wire per IEC 60695-2-12 for 2 s without flame, and exhibit comparative tracking index above 400 V per IEC 60112. The phosphate ester lowers flexural modulus by 8–12% per ISO 178 and tensile strength by 6–10% per ISO 527-2 relative to unfilled non-flame-retarded PBT; snap-fit deflections and screw boss cracking must be revalidated with molded specimens from the same production lot.
Thermoplastic polyurethane cable jacketing for consumer charging cords and industrial automation cables is compounded with 10–20 phr 5603 PB RDP on a 25 mm twin-screw extruder using low-shear screw elements to avoid shear-induced depolymerization of the polyether or polyester soft segment at 170–190 °C. The ester contributes flame resistance and melt viscosity modification but reduces Shore A hardness by 5–8 points; a formulator must therefore specify a base TPU with Shore A 87–92 when the finished jacket must retain 82–85 Shore A after compounding. Pre-drying at 90 °C for 3 h in a forced-air dryer to a residual moisture below 0.03 wt% is required before extrusion; incomplete drying produces surface roughness, intermittent bubble formation, and low peeling strength between jacket and braided shield in wall thickness below 0.8 mm. The terminal cable is evaluated for vertical flame propagation per IEC 60332-1-2 and, for North American charger cords, the vertical flame test described in UL 1581. Mechanical property retention is assessed on die-cut ISO 37 dumb-bell specimens: tensile strength decreases by 10–15% at 15 phr, but elongation at break remains above 400%. Migration risk is evaluated by storing molded plaques at 60 °C and 95% RH for 500 h; surface exudate increases when the phosphate ester acid value exceeds 0.1 mg KOH/g. Grades with low free phenol and controlled triphenyl phosphate are therefore specified for TPU jackets intended for palm-contact consumer goods.
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5603 PB RDP is a spray-dried redispersible polymer powder in the PB series. The RDP designation identifies the material as a redispersible polymer powder for dry-mix mineral binder formulations; the numeric suffix 5603 identifies the grade-specific low-temperature film-formation, redispersibility, and anti-blocking targets within the producer’s product matrix. The base polymer is a vinyl acetate-ethylene copolymer dispersion stabilized with a polyvinyl alcohol protective colloid. In its as-supplied state, the powder is white to off-white and free-flowing. The delivered form is intended for dry blending into cementitious and gypsum-based mortars, where the polymer particles must re-form a continuous latex film after wet mixing and subsequent drying.
Key delivered-form specifications include a dry matter content of minimum 98 % when tested by ISO 3251; residual moisture is controlled to a maximum of 2.0 % by loss-on-drying at 105 °C. Bulk density is specified in the range of 400–550 g/L according to DIN EN ISO 60. Ash content at 1000 °C is controlled within 10–14 % by ISO 3451-1, a balance that supports anti-blocking performance without excessive inorganic residue in the coalesced film. The pH of a 10 % redispersion in deionized water is 7.0–9.0 per ISO 976. Minimum film-forming temperature is specified between 0 °C and 4 °C by ISO 2115, placing the product in the low-MFFT class required for exterior tile adhesives and self-leveling compounds installed at low substrate temperatures. Sieve retention on a 315 µm aperture is specified at a maximum of 2.0 % by ISO 8130-1. The residual moisture and sieve limits are set to protect the powder from blocking in bulk silo storage and to stabilize redispersion in cold mixing water.
| Property | Test method | Typical delivered-form value or range |
|---|---|---|
| Appearance | Visual inspection | White to off-white powder |
| Bulk density | DIN EN ISO 60 | 400–550 g/L |
| Dry matter | ISO 3251 | ≥98 % |
| Residual moisture | ISO 787-2, 105 °C | ≤2.0 % |
| Ash content | ISO 3451-1, 1000 °C | 10–14 % |
| pH, 10 % redispersion | ISO 976 | 7.0–9.0 |
| Minimum film-forming temperature | ISO 2115 | 0–4 °C |
| Sieve retention > 315 µm | ISO 8130-1 | ≤2.0 % |
Dry powder flow is a storage and handling property; redispersibility controls whether the polymer can re-form a continuous film in the mortar matrix. 5603 PB RDP is agglomerated from primary latex particles. During wet mixing, water penetrates the protective colloid layer, dissolves the colloid, and releases the primary vinyl acetate-ethylene copolymer particles. If redispersion is incomplete, the powder contributes hard inclusions rather than a coalescing binder. The redispersibility of 5603 PB RDP is assessed in a 1 L planetary mixer at 150–300 rpm by adding the powder slowly to water at 23 °C. Representative VAE RDP redispersion studies indicate that complete dispersion is obtained within 60–120 s; the resulting dispersion has Brookfield viscosity in the range of 500–1500 mPa·s at 20 rpm when measured by ISO 2555. The low minimum film-forming temperature of 0–4 °C means that even at low ambient temperatures, the coalesced film forms at the hydration boundary rather than remaining as discrete particles.
During hydration, water is removed by cement hydration and evaporation; the polymer concentration at the pore surface increases until the copolymer particles deform and coalesce. The coalescence of VAE RDP films in cement pores follows three stages: wetting of the hydrophobically stabilized particle surfaces, interdiffusion of polymer chains across particle boundaries, and film thickening due to continuing water loss. In the presence of 0.1–0.3 % by weight of plasticizer or coalescing solvent, the film-formation temperature of higher-MFFT RDP grades can be lowered, but 5603 PB RDP is designed to reduce reliance on such additives because its MFFT is already 0–4 °C. The protective colloid used in the powder reduces the risk of premature coalescence in the bag but dissolves rapidly on contact with water. This is the central difference between the powder state and the redispersed state.
At a production scale, 5603 PB RDP is introduced into a horizontal ribbon blender after the cement and aggregate pre-mix reaches visual homogeneity. The powder should not be added directly to hot mixer walls where temperatures exceed 40 °C; localized film formation can occur on paddle surfaces and reduce batch uniformity. A total batch moisture content of 3–5 % before polymer addition is preferred to avoid particle softening. Field failure modes reported in dry-mix plants include partial fusion on screw feeder flights when the plant operates at ambient temperatures above 35 °C, and inconsistent redispersion when the powder is added to water before the mineral fraction has wetted. These are operational boundaries, not chemical incompatibilities. The powder is compatible with calcium aluminate cements only with formulation-specific setting-time checks per EN 196-3; published data for this specific configuration is limited. The product should not be combined with strong oxidizing agents or solvent-based liquid additives that can extract the protective colloid.
Low-water-demand self-leveling compounds and thixotropic tile adhesives subject the redispersed polymer to high shear during pumping. 5603 PB RDP contributes to viscosity build after redispersion, but its VAE base and protective colloid packaging produce shear-thinning behavior that is reversible after pumping. A formulation containing 3 wt% 5603 PB RDP in a self-leveling underlayment normally exhibits a flow diameter of 150–180 mm per EN 12706 at a water-to-solids ratio of 0.22–0.25. The viscosity recovery after 120 s of high-shear mixing is sufficient to minimize aggregate sedimentation, but published data for this specific configuration is limited. In self-leveling underlayments, the addition of the product at 2.0–3.5 % by mass increases plastic viscosity measured at 10 s⁻¹ and 23 °C by 200–400 mPa·s relative to an unmodified control. This viscosity rise reduces segregation and bleeding of fine sand; the effect is reversible after the mixer stops because the redispersed latex is shear-thinning.
The dosage required to prevent sedimentation depends on aggregate fineness modulus; for a sand with a fineness modulus of 1.8–2.2, a dosage of 3.0 wt% is typically evaluated. Open time of a cementitious tile adhesive is measured by EN 1346; formulations with 5603 PB RDP show 20-min open-time adhesion above 0.5 N/mm² when the skinning tendency is controlled by the polymer film rather than by cellulose ether alone. The product is often evaluated using EN 1348 tensile adhesion on concrete slabs after 28 d standard cure, 7 d water immersion plus 21 d standard cure, and 14 d heat ageing at 70 °C plus 14 d standard cure. For a C2TE adhesive, the tensile adhesion values after each conditioning regime are reported in N/mm²; the classification requirement is not a single value but a minimum across all regimes. Mortars containing 5603 PB RDP are typically positioned where the dry-cure adhesion is 0.8–1.3 N/mm² and the water-immersion adhesion is 0.5–0.8 N/mm². The product’s low MFFT and VAE chemistry contribute to film coalescence in the submerged layer, but the formulator must verify that air entrainment and cement hydration do not produce microporosity that undermines the water-immersion result.
In renovation formulations installed at slab temperatures between 10 and 15 °C, the low MFFT of 5603 PB RDP is a technical advantage over VAc homopolymer powders with MFFT above 10 °C. When the product replaces a styrene-butadiene RDP at equal polymer content, the odor and total VOC burden are generally lower, although the film hardness is higher and the elongation at break measured by ISO 527-3 is lower. The selection trade-off is between low-temperature film coalescence and reduced odor on the one hand, and the higher flexibility and higher water resistance of styrene-butadiene films on the other. In a C2TE tile adhesive, the replacement can reduce mortar viscosity drift during extended open time because the VAE polymer has lower plasticizer migration potential than some styrene-butadiene grades. However, published data for 5603 PB RDP in non-Portland binder systems is limited.
| Comparative parameter | 5603 PB RDP | VAc homopolymer RDP | Styrene-butadiene RDP |
|---|---|---|---|
| Minimum film-forming temperature | 0–4 °C | 5–15 °C | −5 to 5 °C |
| Film water resistance | Moderate to high | Low to moderate | High |
| Alkali resistance in cementitious media | High | Moderate | High |
| Typical use temperature | 10–35 °C | 15–35 °C | 5–35 °C |
| Odor and VOC burden | Low | Low to moderate | Moderate |
| Primary technical differentiation | Low-temperature film formation and alkali stability | Cost efficiency in general-purpose mortars | High flexibility and water resistance |
At a formulation level, 5603 PB RDP is used at addition rates from 1.5 % to 6.0 % by total dry mix mass depending on the performance classification. For general-purpose C1 tile adhesives, the lower end is common; for C2TE and flexible self-leveling screeds, addition levels of 3.0–5.0 % are evaluated. The powder is mixed into water with a paddle mixer at 400–700 rpm for 60 s to reach complete redispersion before mortar testing. Any claim regarding final performance must be confirmed on the actual production formulation because cement type, aggregate packing, water demand, and air-entraining admixtures influence film coalescence. Storage stability is maintained at 10–30 °C and relative humidity below 60 % in sealed multi-wall paper bags with a polyethylene liner. Once opened, the powder should be consumed within 24 h to avoid moisture uptake. At relative humidity above 60 %, the product can absorb atmospheric moisture, which raises the risk of partial surface hydration and impairs redispersibility. Incompatibility with amine-based liquid plasticizers should be assessed because amine migration into the polymer film can accelerate plasticizer extraction and reduce film elongation. The product is not classified as dangerous under CLP Regulation (EC) No 1272/2008 for the powder form; individual formulations must be assessed for respirable crystalline silica from cementitious co-formulants.
