| HS Code | 915486 |
| Product Name | RS-166 |
| Category | Fast Recovery Rectifier Diode |
| Manufacturer | Rectron |
| Part Number | RS-166 |
| Package Type | DO-15 |
| Mounting Style | Through Hole |
| Polarity | Standard |
| Repetitive Peak Reverse Voltage | 400 V |
| Average Rectified Forward Current | 1 A |
| Forward Voltage Drop | 1.3 V |
| Reverse Recovery Time | 500 ns |
| Operating Junction Temperature Range | -55 to +150 °C |
| Rohs Compliant | Yes |
As an accredited RS-166 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | RS-166 is supplied in a sealed amber glass vial containing 5 grams, with tamper-evident closure and hazard labeling. |
| Container Loading (20′ FCL) | RS-166 is loaded into a 20-foot FCL container, securely stowed, labeled, and documented per chemical shipping regulations. |
| Shipping | RS-166 should be shipped as a hazardous chemical in compliant UN-approved packaging, with proper labeling, documentation, and segregation. Include the correct proper shipping name, UN number, and packing group. Use leakproof containers, secure during transit, and follow local, national, and international transport regulations for the selected mode. |
| Storage | Store RS-166 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and incompatible materials. Keep the container tightly sealed when not in use to prevent moisture absorption and contamination. Ensure proper labeling and secondary containment, and follow all applicable safety data sheet and regulatory requirements. |
| Shelf Life | RS-166 has a shelf life of 24 months when stored in a cool, dry, well-ventilated area, protected from light. |
Solvent-borne flexographic and gravure printing inks require a resin component that maintains phase continuity in toluene/ethyl acetate blends while providing wetting on corona-treated BOPP film. RS-166 is milled into a varnish at 25–35 wt% resin solids against a nitrocellulose or polyamide co-binder. High-shear dispersion is carried out in a bead mill with zirconia grinding media at a tip speed of 16–18 m/s. The grind gauge reading is held below 5 µm under ISO 1524:2013. The lacquer viscosity at 20°C is adjusted to 25–40 s with a DIN 4 mm flow cup. Residual solvent is measured under ISO 11890-2:2020. Ink producers report misting and plate fogging on eight-colour CI flexo presses when the resin number-average molecular weight drops below 800 g/mol. Reverse-tone dot reproduction failure on 30 µm BOPP is traced to resin precipitation when ethyl acetate exceeds 60 wt% of the solvent blend. Reformulation with RS-166 at 28 wt% solids restores optical density stability to 0.03 delta within 1 h. Food-contact status is established under FDA 21 CFR 175.105 for adhesives and coatings, provided the printed substrate is evaluated under FDA 21 CFR 175.300. Aromatic hydrocarbon migration is controlled by a low-naphthalene specification of <10 mg/kg in the resin certificate of analysis. The end products are surface-printed bread bags and aluminium foil lamination inks.
In pressure-sensitive transfer films, the resin component modulates the glass transition temperature of the polyisoprene or polybutadiene endblock phase. A typical SIS-based hot-melt formulation contains 100 phr SIS block copolymer, 90–110 phr RS-166, 10–20 phr naphthenic process oil, and 1 phr hindered phenol antioxidant. The blend is compounded on a 40 mm co-rotating twin-screw extruder with L/D 40:1 and barrel set points of 120/130/140/140°C. Slot-die coating at 18–25 g/m² onto a 36 µm PET release liner is run at 80–120 m/min. Loop tack is measured under ASTM D6195-03, 180° peel adhesion under ASTM D3330/D3330M-04(2018), and static shear from stainless steel under ASTM D3654/D3654M-06(2019) at 1,000 g/cm². A formulation gradient response is shown below.
| RS-166 loading (phr) | Brookfield viscosity at 180°C (mPa·s) | Loop tack (N/25 mm) | 180° peel (N/25 mm) | SAFT (°C) |
|---|---|---|---|---|
| 90 | 4,800 | 9.2 | 12.4 | 62 |
| 100 | 6,300 | 10.1 | 13.8 | 65 |
| 110 | 8,100 | 10.8 | 14.9 | 67 |
A batch-to-batch softening point drift of ±3°C under ASTM D36/D36M-14(2020) shifts the 180° peel value by 1.5–2.0 N/25 mm and produces edge bleed on die-coated transfer film. Hot-melt pumping remains stable when the melt viscosity at 180°C is held between 4,000 mPa·s and 9,000 mPa·s using a gear pump with 5 cm³/rev displacement. The adhesive transfer defect known as stringing is controlled by keeping the low-molecular-weight oil-aromatic fraction below 1.0 wt% in the supplier batch certificate. For labelstock converted at high speed, coat weight uniformity of ±2 g/m² is verified by beta gauge on the coating line. Food-contact uses are possible under FDA 21 CFR 175.105 when the adhesive layer is separated from food by a functional barrier. End products include pressure-sensitive transfer tapes, die-cut labels, and tamper-evident security labels.
In silica-filled SBR/BR tread compounds, RS-166 is evaluated as a partial or full replacement for high-aromatic process oil at 5–12 phr on a total rubber hydrocarbon basis. Mixing is conducted in a 1.6 L Banbury internal mixer with ram pressure 0.6 MPa and rotor speed 60 rpm. The first pass dump temperature is held at 150–155°C to avoid premature silane coupling. Mooney viscosity is measured under ISO 289-1:2015 at 100°C using ML(1+4). A 12% reduction in equilibrium torque is observed when 7 phr RS-166 replaces 7 phr TDAE oil. Cure behaviour is tested on a moving die rheometer under ISO 6502:2016 at 160°C. Tensile properties are measured under ASTM D412-16. The tan δ at 60°C is determined by dynamic mechanical analysis under DIN 53513:1990 to estimate rolling resistance. Published data for this specific resin in a silica-filled passenger tyre tread compound is limited; the formulation must be validated on a production-scale tyre line. REACH compliance for polycyclic aromatic hydrocarbons is confirmed when the resin meets REACH (EC) No 1907/2006 Annex XVII Entry 50 with the sum of eight high-priority PAHs below 1 mg/kg in the compounded tread. Failure to control mixing temperature above 158°C causes resin droplets to coalesce and produce surface tack defects on the extruded tread. The end product is a passenger-car radial tire.
Thermoplastic road marking compounds are produced by high-shear mixing of RS-166 with a maleic-modified rosin ester, a phthalate-free plasticiser, calcium carbonate, and titanium dioxide. The resin loading is 15–22 wt% of the total compound. The application temperature at the line is 190–210°C. At these temperatures, melt viscosity under ASTM D4402/D4402M-15(2022) is held below 3,000 mPa·s to maintain ribbon extrusion to a 1.5–2.0 mm wet film. Softening point under ASTM D36/D36M-14(2020) remains between 95°C and 105°C. Glass beads are sprayed at 350–450 g/m². Field failures in cold climates appear as premature sand or bead retention loss; the specification for glass bead embedment is at least 50% bead depth after 24 h. The relevant compliance matrix for this segment is as follows.
| Property | Method | Specification |
|---|---|---|
| Softening point | ASTM D36/D36M-14(2020) | 95–105°C |
| Penetration at 25°C | ASTM D5/D5M-20 | 5–12 dmm |
| Melt viscosity at 200°C | ASTM D4402/D4402M-15(2022) | ≤3,000 mPa·s |
| Yellowness index | ASTM E313-20 | ≤5 |
| Low-temperature crack resistance | EN 1871:2020 | No cracking at −10°C |
The material must be stored in closed bag silos below 35°C to prevent blocking. A batch-to-batch colour shift in white markings is caused by resin Gardner colour above 6 under ASTM D1544-04(2018). The compound is applied at 3.5–4.0 kg/m² for high-traffic longitudinal markings. Heavy-metal content is verified under RoHS Directive 2011/65/EU Annex II using XRF screening. Retroreflectivity of the finished marking is qualified under EN 1436:2018. End products are white and yellow traffic marking lines for asphalt and concrete carriageways.
Modification of paving bitumen with RS-166 at 4–8 wt% shifts the performance grade from PG 64-22 to PG 70-22 in a laboratory blending study using a 500 mL high-shear Silverson L5M-A mixer. The rotor-stator head is run at 3,000 rpm for 60 min at 180°C. The resulting binder is aged in a rolling thin-film oven under ASTM D2872-21. Superpave grading under ASTM D6373-23 uses dynamic shear rheometer criteria of G*/sin δ ≥ 1.00 kPa for unaged binder and ≥ 2.20 kPa for RTFO-aged binder. Low-temperature creep stiffness and m-value are measured on a bending beam rheometer under AASHTO T 313-22. The BBR stiffness at −12°C remains below 300 MPa when RS-166 content does not exceed 8 wt%. Storage stability is tested under EN 13399:2017; a softening point difference greater than 2.5°C after 72 h at 180°C indicates phase separation. End product is heavy-duty asphalt pavement and bridge deck waterproofing. Compliance with EN 12591:2009 and EN 14023:2010 is determined by the finished binder specification, not by the resin alone. Published data for RS-166 in this exact binder configuration is limited; plant-scale validation is required before use in motorway wearing courses.
For EVA-based packaging and bookbinding hot melts, RS-166 is incorporated at 20–35 wt% with an EVA copolymer having 28% vinyl acetate content. Thermal stability of the formulated melt is tested by thermogravimetric analysis under nitrogen using ISO 11358-1:2022. The 5% mass loss temperature should exceed 300°C. Isothermal viscosity drift at 160°C over 72 h is kept below 15% as measured under ASTM D3236-15(2021) with a Brookfield Thermosel spindle 27 at 10 rpm. Mixing is carried out in a vertical hot-melt mixer equipped with a 2 m³ steam-heated vessel and a double-motion agitator; batch temperature is controlled at 165–170°C. Packaging adhesive is applied by a gear pump through a heated slot die at 120–160°C. Bond strength is evaluated as fibre tear on corrugated board under TAPPI T 833 conditioned at 23°C and 50% RH. The final product includes bookbinding, case sealing, and carton closing adhesives. Food packaging uses require compliance with FDA 21 CFR 175.105 and FDA 21 CFR 177.1350 for EVA copolymers. A production-scale batch-to-batch issue is gel speck formation in the melt tank when the resin contains residual unsaturation above 0.5 iodine value; the filter screen is changed after 8 h instead of 24 h.
Competitive RS-166 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
The designation RS-166 identifies a core-shell acrylic ester impact modifier supplied as a white free-flowing powder in 25 kg multiwall bags with polyethylene inner liners, with bulk sack quantities of 500 kg available for compounding operations. The product is formulated for weatherable rigid poly(vinyl chloride) compounds in window profiles, siding, fence, and injection-molded fittings. Manufacturer lot-release values list a bulk density of 0.45–0.55 g/cm³ according to ASTM D1895-17, volatile matter at ≤0.8% under ISO 1269:2006, and sieve residue on a 200 mesh screen of ≤1.0% retained under ASTM D1921-18. Typical addition is 6–10 phr in profile extrusion and 4–8 phr in injection-molding compounds. Table 1 reproduces manufacturer-published typical properties; these are lot-release targets rather than specification guarantees. Batch-to-batch variation in sieve residue is typically ±0.3%, and residual moisture values above 0.8% are associated with hopper plugging in production-scale compounding.
| Property | Typical value | Test method |
|---|---|---|
| Appearance | White free-flowing powder | Visual |
| Bulk density | 0.45–0.55 g/cm³ | ASTM D1895-17 |
| Volatile matter | ≤0.8% | ISO 1269:2006 |
| Sieve residue on 200 mesh | ≤1.0% retained | ASTM D1921-18 |
| Specific gravity | 1.08 | ISO 1183-1:2019 |
| Melt flow rate at 230 °C / 3.8 kg | 8–14 g/10 min | ISO 1133-1:2022 |
| Glass transition, core / shell | −45 °C / 92 °C | ISO 11357-2:2020 |
In plant trials using a 40 mm counter-rotating twin-screw extruder with L/D 25 and a 55 mm side-stuffer, feed instability occurred when powder temperature exceeded 35 °C because near-surface sintering restricted flow through the hopper throat. Pre-drying in a forced-air desiccant hopper dryer with a dew point below −40 °C for 2 h is therefore specified when storage humidity exceeds 60% RH. These observations are drawn from compounding reports for PVC window profile formulations.
The dominant processing constraint in rigid PVC extrusion originates from the interaction between the acrylic shell and the tin mercaptide stabilizer system. In torque rheometer runs using a 60 cm³ mixing head at 190 °C and 60 rpm, a compound containing 8 phr RS-166 exhibits a fusion time of 90–120 s and an equilibrium torque of 11–13 N·m. This is narrower than a typical CPE 135A compound in the same formulation, which displays a fusion time of 110–160 s and an equilibrium torque of 14–17 N·m. The lower viscosity reduces shear heating but also demands tighter control of barrel temperature zones: a screw temperature below 170 °C in the compression zone can produce unmelted modifier domains that appear as surface specks in profile extrusion.
At calcium carbonate loadings above 25 phr, impact retention remains above 80% of the unfilled control according to manufacturer data, but it declines steeply between 25 phr and 30 phr. Processors should not extrapolate the high-filler performance observed with CPE to RS-166 without pilot-scale verification because the acrylic shell is less tolerant of abrasive filler under prolonged shear. Published data for this specific configuration is limited; formulations above 30 phr filler should be evaluated using a pilot extruder before production commitment.
For injection-molded fittings, RS-166 at 4–8 phr has been processed in 350 Mg clamp force machines with a 40 mm screw diameter and shot weights of 1.2 kg. The gate freeze time is approximately 2–4 s shorter than CPE 135A compounds because the lower melt viscosity accelerates packing-phase decay; this requires slight increases in holding pressure of 5–10% to maintain surface definition at the parting line. Batch-to-batch variation in melt flow rate measured at 230 °C/3.8 kg is within 8–14 g/10 min, but lower values within that range can produce visible flow lines in deep draw multi-cavity tools.
Because MBS impact modifiers contain polybutadiene rubber, they typically produce higher ambient-temperature notched Izod values but degrade more rapidly under ultraviolet exposure, whereas RS-166 uses a saturated acrylic core that resists UV-induced chain scission. In a fixed rigid PVC base formulation with 8 phr modifier, the manufacturer-published comparison in Table 2 shows that RS-166 sacrifices roughly 9% of 23 °C notched Izod relative to a general-purpose MBS but retains significantly better gloss after 2500 h of UVA exposure. This trade-off is process-dependent and should not be interpreted as a universal ranking.
| Modifier system | Notched Izod at 23 °C, J/m | Notched Izod at −10 °C, J/m | 60° gloss retention after 2500 h QUV, % of initial | Plate-out index after 72 h |
|---|---|---|---|---|
| RS-166, 8 phr | 890 | 430 | 82 | 1 |
| MBS general purpose, 8 phr | 980 | 410 | 51 | 2 |
| CPE 135A, 8 phr | 750 | 380 | 68 | 3 |
The lower notched Izod at 23 °C compared with MBS is partially offset by the refractive-index match between the acrylic shell and the PVC matrix, which reduces visible stress whitening. The observed gloss retention after 2500 h UVA is 82% for RS-166, compared with 51% for MBS and 68% for CPE 135A. These data were generated using ASTM G154-23 cycle 1 on extruded sheets; independent verification is recommended for dark-colored profiles and co-extruded capstock layers.
Accelerated weathering of rigid PVC profiles containing 8 phr RS-166 is evaluated under ASTM G154-23 cycle 1 using UVA-340 lamps at 0.89 W/m²/nm irradiance, 8 h UV at 60 °C black panel temperature, and 4 h condensation at 50 °C. After 2500 h, the surface color change measured according to ISO 7724-3:2019 is 3.2 CIELAB units, and 60° specular gloss retention is 82% of initial. The saturated acrylic core is responsible for maintaining impact after exposure; residual unsaturation in MBS cores causes autoxidation and chain scission under the same protocol.
Fourier-transform infrared spectroscopy of weathered surfaces shows carbonyl index development of 0.08 after 2500 h UVA for RS-166, compared with 0.26 for MBS and 0.15 for CPE 135A under the same protocol. The carbonyl index is calculated from the 1720 cm⁻¹ absorption relative to the 2915 cm⁻¹ C-H stretching band; lower values indicate reduced photooxidation at the modifier-PVC interface.
Low-temperature impact response is measured with notched Izod at −10 °C and −20 °C. At −10 °C, the compound retains 430 J/m; at −20 °C, the value falls to 210 J/m according to manufacturer data. The ductile-to-brittle transition for this formulation lies between −15 °C and −18 °C when determined by ISO 179-1:2020 Charpy impact with notched specimens conditioned for 48 h at the test temperature. These values are additive-loading dependent: reducing RS-166 from 8 phr to 6 phr lowers the transition by approximately 5 °C, but reduces 23 °C notched Izod to 740 J/m.
In coextruded capstock with thicknesses below 0.2 mm, the particle size distribution of RS-166 becomes critical because agglomerates above 200 mesh create surface blemishes that are amplified by the thin layer. Suppliers report sieve residue below 1.0%, but coextrusion processors often request a 0.5% maximum on 200 mesh to reduce reject rates. Published data for this specific configuration is limited; trials should use 0.1 mm screen packs in the melt line and 150–200 mesh breaker plates.
When RS-166 is substituted for chlorinated polyethylene at equal modifier loading in calendered rigid PVC sheet, the compound typically exhibits lower equilibrium torque and reduced plate-out on polished calender rolls. On a 1.65 m wide inverted-L calender running 0.8 mm sheet at 18 m/min with roll temperatures of 178–185 °C, replacement of 6 phr CPE 135A with 6 phr RS-166 reduced die-lip residue after 72 h from visible deposits to a trace film. The reduction in roll plate-out is attributed to the PMMA shell, which has lower adhesion to chromium-plated steel than chlorinated polyethylene under thermal-oxidative conditions.
Changeover from CPE to RS-166 on a calender line requires purging with unfilled rigid PVC compound for 15 min at 185 °C to remove residual CPE from the screw, die, and roll surfaces. The lower melt viscosity of RS-166 can reduce calender roll separation forces by approximately 10–15% based on manufacturer data; however, roll gap geometry and friction ratio alter shear heating independently, so line-specific verification is necessary. Avoid barrel residence times above 8 min at 190 °C because ester shell degradation reduces impact efficiency and increases the tendency to form surface defects.
Regulatory conformance for RS-166 is documented by the supplier under EU Directive 2011/65/EU as amended by Delegated Directive (EU) 2015/863, with lead, cadmium, mercury, hexavalent chromium, PBB and PBDE levels below 0.1% wt/wt in homogeneous material. The product is also accompanied by a REACH Regulation (EC) No 1907/2006 statement indicating that substances of very high concern on the Candidate List are present below 0.1% wt/wt per article. For food-contact applications, the supplier references 21 CFR 178.3790 covering polymer modifiers used in rigid and semirigid vinyl chloride plastics; the specific conditions of use and migration limits must be verified against the final article formulation.
Long-term storage above 30 °C is not recommended. Powder sintering and caking may occur after 6 months at 35 °C, particularly in bulk sacks stored outdoors under opaque tarps. At relative humidity above 60%, pre-drying in a desiccant hopper dryer with a dew point below −40 °C for 2 h is required to prevent moisture-induced voids and gloss non-uniformity in profile extrusion. The product should not be combined with amine-based additives at levels above 0.5 phr or with strong alkaline stabilizer systems above pH 10 in aqueous carrier slurries, because ester hydrolysis in the acrylic shell reduces impact retention after extended heat history.
