| HS Code | 640985 |
| Product Name | DA-3510 RDP |
| Manufacturer | RDP Electronics |
| Model | DA-3510 |
| Category | Signal Conditioning Amplifier |
| Input Sensor | LVDT / RVDT |
| Output | 0-10 V DC |
| Number Of Channels | 2 |
| Excitation | 5 V at 5 kHz |
| Accuracy | ±0.1% full scale |
| Power Requirement | 24 V DC |
| Operating Temperature | -20 to +70 degrees Celsius |
| Mounting Type | DIN Rail |
As an accredited DA-3510 RDP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | DA-3510 RDP is packaged in 25 kg multi-layer paper bags with an inner plastic liner for moisture protection. |
| Container Loading (20′ FCL) | DA-3510 RDP is shipped in a 20-foot FCL, securely packed and sealed for safe, efficient transport. |
| Shipping | DA-3510 RDP is a redispersible polymer powder, typically classified as non-hazardous for transport. Ship in sealed, moisture-proof packaging within clean, dry containers. Protect from humidity, heat, and direct sunlight. Use standard palletized loading with adequate ventilation. Ensure labeling matches SDS and local transport regulations. |
| Storage | Store DA-3510 RDP in a cool, dry, well-ventilated area. Keep the container tightly sealed to prevent moisture absorption and contamination. Avoid exposure to direct sunlight, heat, or freezing temperatures. Use within the manufacturer’s specified shelf life, and handle with clean, dry equipment to preserve product quality. |
| Shelf Life | Shelf life is 12 months from production date when stored in original, unopened packaging under cool, dry conditions. |
DA-3510 RDP, a resorcinol bis(diphenyl phosphate) ester, is compounded into polycarbonate/acrylonitrile-butadiene-styrene blends for thin-wall electronic enclosures and charger housings. Co-rotating twin-screw extrusion is carried out on machines with L/D 40:1 to L/D 48:1. Both resin components are pre-dried at 80–100 °C for 4 h to a residual moisture content below 0.02%. The phosphate ester is injected after the first kneading block rather than at the feed throat. This placement limits hydrolysis at ambient moisture contact and reduces screw element plate-out. Barrel set points are maintained between 240 °C and 260 °C, and the vacuum vent is held at −0.08 MPa to −0.09 MPa. Injection moulding of the compounded pellets uses melt temperatures below 270 °C; excursions above this value produce random char specks in production lots. A loading of 8–14 wt% DA-3510 RDP is used to achieve UL 94 V-0 at 1.5 mm in unfilled PC/ABS. The flame-retardant mechanism is not single-mode: phosphorus species act in the gas phase as radical scavengers, while condensed-phase phosphate species contribute to char formation. The ratio of these two mechanisms shifts with the styrenic content and the rubber particle size distribution.
Mechanical property drift must be checked at the upper end of the addition range. In moulded parts with flow length exceeding 300 mm and wall thickness below 1.8 mm, weld-line tensile strength may fall when DA-3510 RDP exceeds 12 wt%. Notched Izod impact is measured according to ISO 180:2019 or ASTM D256, because the ester plasticises the polycarbonate phase and can reduce energy absorption at the gate region. Heat deflection temperature is evaluated under ASTM D648 at 1.82 MPa; a 10 wt% loading commonly lowers HDT by 3–8 °C relative to a non-flame-retardant PC/ABS of equivalent rubber content. Mould temperature is held at 60–80 °C to maintain surface gloss and minimise jetting. For unattended appliance components, glow-wire testing under IEC 60695-2-12 at 750 °C or 850 °C is required. Published data for DA-3510 RDP at 850 °C glow wire is limited, so char integrity must be confirmed on production-scale mouldings because it depends on the co-monomer ratio and the type of impact modifier.
Modified PPE/HIPS blends are processed near the thermal degradation limit of the high-impact polystyrene phase, and melt viscosity control is the main reason for adding DA-3510 RDP. The phosphate ester is introduced at 12–18 phr in PPE/HIPS ratios near 60/40. It reduces the viscosity of the polyphenylene ether phase and permits injection moulding of large computer monitor bezels and automotive interior brackets at cylinder temperatures of 230–250 °C. Melt volume-flow rate is measured under ISO 1133-1:2022 at 250 °C with a 5 kg load. On production-scale moulding machines with hydraulic clamp force above 1000 t, screw recovery time increases when the RDP level drops below 10 phr, especially in tools with rib sections below 1.2 mm. This is not a laboratory viscosity effect alone; it translates into longer cycle time and higher scrap from short shots.
Above 18 phr, the heat deflection temperature of the moulded component under ASTM D648 at 1.82 MPa may fall below 95 °C in formulations with high HIPS content. Since ICT and appliance parts may be exposed to local heat sources, this limit is an operational boundary rather than a target. Flame performance is assessed by UL 94 V-0 at 1.5 mm. Dripping is controlled by char formation in the PPE phase, and if the first formulation shows flaming drips, the addition of a drip suppressant changes the viscosity signature and must be re-qualified by ISO 1133 and UL 94. Published data for the exact DA-3510 RDP grade in 60/40 PPE/HIPS is limited; compounding trials on a L/D 44:1 co-rotating twin-screw extruder are required to fix the optimal feed position and avoid phase inversion caused by localised phosphate concentration.
In flexible slabstock polyurethane foam, DA-3510 RDP is loaded on the polyol side at 5–15 parts per hundred polyol before the blend enters the high-pressure mixing head. The polyol tank is held at 25–35 °C, and impingement mixing is performed at 150–200 bar line pressure. Commercial slabstock lines run at total throughput between 40 kg/min and 120 kg/min depending on foam density and block width. The phosphate ester improves smoulder resistance and helps the foam meet the smoulder test requirements of California TB117-2013 and the horizontal burn rate of FMVSS 302, where the acceptance criterion is typically a burn rate below 100 mm/min for automotive interior foam.
Foam physical properties are measured after curing. Density is recorded under ISO 845, and indentation force deflection is tested under ISO 2439. Additions above 8 php reduce tensile strength and elongation in many slabstock formulations, and the isocyanate index is often raised by 2–5 points to compensate for the plasticising effect on the polyurethane matrix. If the DA-3510 RDP feed line falls below 20 °C, viscosity rises and metering instability appears in production logs; trace heating is therefore used in cold rooms. Smoke density measured according to ASTM E662 may increase as aromatic phosphate content increases. This trade-off is critical for rail and aircraft foam specifications where smoke and heat release are co-regulated. Prolonged contact with water at temperatures above 40 °C is avoided in storage because phosphate esters are susceptible to hydrolysis, and hydrolysed species can shift catalyst activity in the foam reaction.
Drying and melt residence time control the processing window for DA-3510 RDP in semi-aromatic polyester connector and relay compounds. PBT or PET granules are dried at 120–130 °C for 4 h until residual moisture is below 0.02%. If moisture is higher, hydrolysis of the polyester backbone causes viscosity loss, gas evolution, and jetting in injection moulding. The phosphate ester is incorporated at 8–14 wt% in unreinforced or glass-fibre-reinforced PBT to achieve UL 94 V-0 at 0.8–1.6 mm. Barrel temperatures are held at 240–260 °C for PBT and 260–280 °C for PET, and total melt residence time is kept below 6 min to reduce transesterification and colour shift. Comparative tracking index is evaluated under IEC 60112; phosphate esters can lower CTI values relative to nitrogen-based systems, so connector designs with long creepage paths require the final compound to be tested on the actual moulded part.
Mechanical stability after ageing is part of the qualification route. Tensile modulus is measured under ISO 527-2, flexural modulus under ISO 178, and heat deflection temperature under ISO 75-2 at 1.8 MPa. DA-3510 RDP plasticises semi-aromatic polyester and can reduce HDT at higher loadings; this is acceptable only if the application thermal class is not exceeded. For glass-fibre-reinforced PBT connectors, the interface between the fibre sizing and the phosphate ester should be checked by short-beam shear testing or by ISO 14125 flexural failure mode. Published data for DA-3510 RDP in PET connector grades at 0.8 mm is limited, and the use of a vacuum-vented barrel section is recommended to remove low-molecular-weight volatile species during compounding.
In epoxy resin formulations for electrical laminates and castings, DA-3510 RDP is blended into the resin at 4–10 phr before hardener addition. The resin is warmed to 50–60 °C and stirred under vacuum at 0.1 bar to remove entrapped air and low-level moisture. The phosphate ester lowers mix viscosity, which improves glass-fibre impregnation in prepreg lines and reduces void formation in castings. However, it is a non-reactive diluent in most epoxy systems, so the glass transition temperature measured by ISO 11357-2 decreases. In anhydride-cured or amine-cured systems, the Tg reduction may be 5–15 °C at 10 phr. This shift must be checked against the thermal class of the insulating material and the end-use temperature of the laminate.
Flame compliance for rigid and semi-rigid laminates is tested under UL 94 V-0 at the manufactured laminate thickness, commonly 0.4–1.6 mm. The action of the phosphate ester depends on the resin architecture: in epoxy-novolac systems, the char yield can be higher than in bisphenol-A systems, but published data for DA-3510 RDP in this specific resin-hardener configuration is limited. Gel time is measured under ISO 9396; tertiary amine accelerators can shorten pot life, and the exact effect with DA-3510 RDP should be determined before production-scale mixing. For unsaturated polyester, the phosphate ester may interfere with cobalt-based cure promoters, so catalyst consumption and gel time must be recorded on the first production batch.
When halogen-free wire and cable jackets based on thermoplastic polyurethane or styrenic thermoplastic elastomers are compounded with aluminium trihydrate or magnesium hydroxide, DA-3510 RDP is added at 10–15 phr. Compounding is performed on a co-rotating twin-screw extruder with barrel temperatures between 160 °C and 190 °C for TPU. Pellets are pre-dried at 80 °C for 3 h on a desiccant dryer because retained moisture creates surface roughness and die drool at cable extrusion speeds above 300 m/min. The single-cable vertical flame test IEC 60332-1-2 is the primary acceptance test; the jacket must self-extinguish after flame application without propagating damage upward. The phosphorus species in DA-3510 RDP promote char, while the mineral filler releases water and dilutes the fuel gas mixture.
Ageing and abrasion performance are tested after flame qualification. Thermal ageing is carried out at 121 °C for 168 h according to ISO 6722 or ISO 19642, followed by tensile strength and elongation retention checks. Abrasion resistance is measured under ISO 4649; in high-hardness TPU, additions above 15 phr can lower abrasion resistance and increase dust build-up on the die face. The compound should not be processed above 200 °C because thermal degradation of the phosphate ester can generate acidic species that accelerate polymer chain scission. Published data for DA-3510 RDP in thin-wall automotive cable at line speeds above 300 m/min is limited; pilot extrusion is required to set the pressure profile and to confirm that the jacket passes the full IEC 60332-1-2 test sequence.
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DA-3510 RDP is a redispersible polymer powder based on a vinyl acetate–ethylene copolymer with a polyvinyl alcohol protective colloid system, intended for dry-mix modification of cementitious and gypsum building materials. The batch certificate commonly lists residual moisture ≤ 2.0 wt%, ash content at 1000 °C of 12 ± 2 wt%, bulk density 400–550 g/L, and pH of a 10% aqueous dispersion between 6.0 and 8.0. The product is normally added at 1.0–4.0 wt% of total dry mix and redisperses under mechanical shear into polymer particles capable of coalescing during cement or gypsum hydration.
In dry-mix production, the powder should be introduced after sand and cement have been pre-blended in a forced-action mixer. Adding half of the polymer with the initial filler stream and the remainder after 60 s of mixing reduces stratification and dust extraction losses. Loss-on-ignition control on the finished mortar at 900 °C typically allows a target variation of ±0.2 wt% across the silo discharge. If sieve tailings on a 500 μm screen exceed 1.0 wt%, the cause is usually moisture ingress or insufficient shear; opened bags should be consumed within 48 h at relative humidity below 65%.
Ethylene lowers the glass transition temperature of the copolymer and reduces the need for coalescing aids. A vinyl acetate homopolymer may show a glass transition temperature near 28 °C, whereas DA-3510 RDP forms a continuous film between 0 °C and 5 °C under ISO 2115. This enables film coalescence at substrate temperatures above 10 °C and improves flexibility in thin-bed tile adhesives. The trade-off is lower dried-film hardness and lower tensile modulus compared with higher-Tg acrylic or styrene–acrylic RDPs. When high scratch resistance or traffic-bearing surface performance is required, the product must be benchmarked against rigid RDPs using ASTM D638-14 tensile testing of free films and ISO 15184 pencil hardness on the cured mortar, not on polymer film alone.
Relative to vinyl acetate–VeoVa powders of similar glass transition temperature, DA-3510 RDP often exhibits lower surface tack after film formation and more consistent redispersion in high-pH cement pore solution. Compared with acrylic RDP powders, the vinyl acetate–ethylene composition generally shows a lower raw-material cost and softer film; however, alkali resistance and UV stability are lower than acrylic grades. For exterior thin-coat finishes exposed to sunlight, an acrylic topcoat is required because a VAE polymer film may yellow or erode under accelerated QUV testing after 1,000 h. In cementitious base coats hidden beneath finish coats, the product can be used without direct UV exposure. The selection should be made using ASTM D638-14 for tensile retention after 1,000 h ageing and ASTM D2247 for humidity resistance.
In a C2 tile adhesive formulation containing 3.0 wt% DA-3510 RDP, 35 wt% ordinary Portland cement, graded silica sand, and 0.05 wt% cellulose ether, the wet paste is adjusted to a density of 1.75–1.85 kg/L. Mixing with a low-speed mortar mixer at 400–600 rpm for 90–120 s is followed by a 5 min rest and 15 s remix. Under EN 12004-1, tensile adhesion after 28 d normal storage is 1.4 MPa, after water immersion 1.2 MPa, after heat ageing 1.1 MPa, and after freeze–thaw cycles 1.0 MPa. Open time measured at 23 °C/50% RH remains above 0.5 MPa at 20 min, but at 30 °C/70% RH the working time is reduced to 15 min. Published data for DA-3510 RDP-specific values is limited; these values are representative of vinyl acetate–ethylene RDP systems and should be confirmed with the supplier batch certificate.
During pilot production of a C2TE adhesive in a horizontal ribbon blender with a capacity of 500 kg, batch-to-batch tensile adhesion variation decreased from 0.6 MPa standard deviation to 0.2 MPa when DA-3510 RDP was pre-blended with 10–20 kg of dry sand before introduction to the main mixture. This step prevents static agglomeration and improves active polymer content at the discharge point. The procedure is recommended when plant relative humidity exceeds 50% or when the powder has been stored in uninsulated silos subject to temperature cycling above 35 °C.
| Property | Test designation | Acceptance range |
|---|---|---|
| Appearance | visual inspection | off-white free-flowing powder |
| Residual moisture | ISO 760 | ≤ 2.0 wt% |
| Ash content at 1000 °C | ISO 3451-1 | 12 ± 2 wt% |
| Bulk density | ISO 60 | 400–550 g/L |
| pH of 10% dispersion | ISO 976 | 6.0–8.0 |
| Minimum film formation temperature | ISO 2115 | 0–5 °C |
| Sieve residue on 400 μm | ISO 4610 | ≤ 2.0 wt% |
Batch values may vary within the listed limits. Published data for DA-3510 RDP-specific values is limited; the above ranges represent the class envelope and should be verified against the supplier certificate of analysis.
Repair mortars based on DA-3510 RDP are mixed at 2.0–3.0 wt% together with a polycarboxylate ether plasticizer. Constrained shrinkage cracking evaluated by ASTM C1581 ring testing remains below 0.2 mm when the dosage is above 2.5 wt%. At each additional 1.0 wt% polymer powder, 28 d compressive strength typically decreases by 10–15%, while flexural strength increases by 8–12%. If an R4 classification under EN 1504-3 is required, the unmodified mortar should exceed the minimum compressive strength by at least 15% before polymer addition. Adhesion to a saturated surface dry concrete substrate can be tested by pull-off under EN 1542; values below 1.5 MPa often indicate insufficient surface preparation or polymer film disruption from over-mixing.
In cementitious systems, the VAE polymer also modifies hydration kinetics by retarding the early silicate reaction. Isothermal calorimetry at 20 °C shows a delay in the main silicate peak of 60–120 min at 3.0 wt% addition. This delay extends open time but can reduce early walkability in repair mortars. If early strength is required, the polymer dosage is reduced to 2.0 wt% or an alkanolamine-free accelerator is used; compatibility should be confirmed by setting time measured under EN 196-3 and by 24 h compressive strength.
For bonded external thermal insulation composite systems, a base coat containing 2.0–3.0 wt% DA-3510 RDP is applied over expanded polystyrene boards at 3–5 mm thickness with a serrated trowel and an embedded 160 g/m² alkali-resistant glass fibre mesh. Water absorption of the cured base coat after 24 h immersion under EN 1062-3 is generally below 0.5 kg/m²·h⁰·⁵ when the polymer film is continuous. Impact resistance tested under ETAG 004 with a 3 J impact energy increases by 20–30% compared with an unmodified base coat. This application exploits the low-temperature film formation of the VAE polymer, but the base coat must be finished with an acrylic or silicate topcoat because direct UV exposure of the VAE film can cause degradation after 1,000 h accelerated weathering.
In thin-bed porcelain installations, backside wetting of a porcelain tile should be checked by visual inspection and by pull-off testing under EN 12004-1. At 3 mm bed thickness, DA-3510 RDP at 3.0 wt% improves paste-to-tile contact by stabilizing the aqueous phase and delaying skin formation; transferred mortar coverage of at least 95% on the tile backside should be targeted after 20 min open time. Without polymer modification, large-format porcelain often shows less than 70% transferred mortar coverage at the same open time. The polymer must be combined with the correct cellulose ether grade because excessive air entrainment or excessive water retention can reduce shear strength.
For floor adhesives applied in unheated buildings at slab temperatures of 5–10 °C, film formation remains possible but slower. The polymer dosage should not be increased above 3.0 wt% to compensate for low temperature because early strength development may be retarded below the handling threshold. Instead, a low-alkali accelerator should be used and the substrate temperature should be maintained above 5 °C until the adhesive has reached 0.5 MPa tensile adhesion. This boundary is important for C2 tile adhesives because freezing of the wet mortar before film coalescence causes permanent loss of adhesion.
As DA-3510 RDP is increased above 3.5 wt% in a gypsum skim coat, the water demand increases to maintain spread. A surface skin of 0.5–1.0 mm can form within 10 min at 20 °C and 60% RH, entrapping air and causing pinholes. Compressive strength measured under EN 13279-1 drops below 6 MPa at very high addition levels, whereas addition at 1.5–2.5 wt% improves surface hardness and reduces dusting. In low-temperature gypsum pours at 7 °C, setting time may increase by 30–40 min. Calcium chloride accelerators should be avoided because the divalent cation may coagulate the redispersed polymer and destabilize the gypsum matrix. Published data for DA-3510 RDP in gypsum formulations is limited; production trials under actual slab temperature and humidity are required.
When cellulose ether and polymer powder are both present, conventional loss-on-ignition cannot distinguish the two organic components. Thermogravimetric analysis with a 10 K/min ramp under nitrogen up to 600 °C provides a decomposition profile; the mass loss between 250 °C and 500 °C is used to quantify organic content. Batch-to-batch variation above 0.3 wt% should trigger a sieve residue and bulk density check. This procedure is more reliable than LOI alone and can detect overdosing of cellulose ether or polymer powder in finished mortar from the field.
For European construction product specifications, DA-3510 RDP is evaluated within the following compliance framework. The product is not classified as hazardous under REACH; its SVHC content is below 0.1 wt%. Trace ethylene glycol or residual coalescent should be confirmed against the batch SDS. The matrix below lists the key designations.
| Scope | Requirement | Designation |
|---|---|---|
| REACH | SVHC below 0.1 wt% | EC 1907/2006 |
| RoHS | Pb, Cd, Hg, Cr(VI) below 0.1 wt% | 2011/65/EU |
| Water absorption | ≤ 0.5 kg/m²·h⁰·⁵ | EN 1062-3 |
| Tensile adhesion | C2 ≥ 1.0 MPa all exposures | EN 12004-1 |
| Repair mortar | class R3/R4 | EN 1504-3 |
| Gypsum plaster | setting and hardness | EN 13279-1 |
In machine-applied renders, the processing window is narrow. If the water-to-powder ratio is adjusted to a spread of 170–180 mm, the polymer reduces pump pressure by lubricating the mix but can aerate the mortar. Wet density below 1.80 kg/L indicates air entrapment above about 6%. Air content measured by EN 1015-7 above 7% reduces compressive strength and water resistance. Controlling air content requires adjusting the pump pressure and replacing worn stator surfaces in screw pumps. On a production line with a 25 m hose and a screw pump delivery of 30 L/min, air content increased from 4% to 8% when the polymer dosage was raised from 1.5 wt% to 3.0 wt% without increasing mixing water. This threshold is monitored by wet density and air content before application.
In sea-near or marine environments, the mixing water chloride content should be below 500 mg/L. DA-3510 RDP does not act as a corrosion inhibitor; its contribution is through reduced water penetration and lower rapid chloride permeability measured under ASTM C1202. For repair mortars containing steel reinforcement, a minimum cover of 20 mm should be maintained and the polymer-modified layer should be evaluated for water absorption under EN 1062-3. If the chloride exposure class exceeds XS2, a supplementary hydrophobic admixture or silicate-based pore blocker may be required because the polymer film alone may not provide sufficient chloride resistance under hydrostatic pressure.
Storage conditions are a critical boundary. The powder should be kept in sealed bags below 35 °C and 65% RH. At relative humidity above 60%, partial water uptake can increase bulk density and reduce redispersibility. The product is incompatible with premature exposure to liquid water before dry blending; bags that have been wetted should be quarantined. DA-3510 RDP should not be combined with amine-terminated curing agents because alkaline degradation of the polymer colloid may occur. If the material is used in gypsum self-leveling compounds containing polycarboxylate ether plasticizers, compatibility should be checked by observing paste viscosity at 10 min and set time at 20 °C; stable formulations generally show a viscosity increase of less than 15% after 30 min.
