| HS Code | 253583 |
| Brand | Jusage |
| Model | SBS 4402 |
| Product Type | SBS-modified bitumen waterproofing membrane |
| Base Material | SBS-modified bitumen |
| Reinforcement | Polyester mat |
| Thickness | 4 mm |
| Width | 1000 mm |
| Length | 10 m |
| Roll Area | 10 m² |
| Weight | 4.5 kg/m² |
| Upper Surface | PE film |
| Lower Surface | PE film |
| Color | Black |
| Tensile Strength | ≥800 N/50 mm |
| Elongation At Break | ≥40% |
| Heat Resistance | 105°C |
| Low Temperature Flexibility | -25°C |
| Water Impermeability | 0.3 MPa for 30 min |
| Service Temperature | -25°C to 105°C |
| Standard | GB 18242-2008 |
| Packaging | Roll |
| Application | Roof, basement, tunnel, bathroom waterproofing |
As an accredited Jusage SBS 4402 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Jusage SBS 4402 packaging: 25 kg polyethylene-lined paper bags, palletized and shrink-wrapped for safe industrial transport. |
| Container Loading (20′ FCL) | Jusage SBS 4402 loaded in a 20′ FCL: palletized 25 kg bags, shrink-wrapped, securely strapped, dry container, no hazardous classification. |
| Shipping | Jusage SBS 4402 is shipped as a non-hazardous thermoplastic elastomer, not regulated for transport by DOT, IMDG, or IATA. It is packaged in 25 kg bags or jumbo bags. Store in a cool, dry, ventilated area, away from moisture, ignition sources, and direct sunlight. Handle with care. |
| Storage | Store Jusage SBS 4402 in a cool, dry, well-ventilated area, away from direct sunlight, heat, sparks, and open flames. Keep containers tightly closed, upright, and clearly labeled. Protect from moisture, rain, and contamination. Separate from strong oxidizers, acids, and alkalis. Avoid excessive temperatures. Use secondary containment. Do not store near food, drink, or animal feed. Store in original packaging. |
| Shelf Life | Jusage SBS 4402 shelf life is about 12 months when stored sealed in a cool, dry, ventilated place, away from sunlight and moisture. |
In bitumen modification for highway paving, Jusage SBS 4402 is introduced into penetration-grade or viscosity-grade base bitumen at 4.0–6.0 wt% of the binder, with the upper range 6.0–7.0 wt% reserved for high-stress porous asphalt wearing courses and stress-absorbing membrane interlayers. The base bitumen is preheated to 165–175 °C before the polymer pellets are fed through a gravimetric screw feeder into an agitated tank equipped with a rotor-stator high-shear mill operated at tip speeds of 15–25 m/s and a dispersion temperature of 170–185 °C; the shearing stage is held for 20–40 min until a homogeneous dispersion is confirmed by fluorescence microscopy at 400×, after which the modified binder is transferred to a low-shear maturation tank at 170–175 °C for 2–4 h. Production-scale failures in this process are associated with short-duration high-shear dispersion and truncated maturation, which leave a two-phase system that separates during vertical storage at 160 °C. With highly asphaltenic or low-aromatic base bitumens, the compatibility margin narrows and the addition of an aromatic extender or compatibilizer may be required before the high-shear stage. The finished binder is controlled under EN 14023:2010, ASTM D5976, and AASHTO M 320; laboratory confirmation includes softening point by EN 1427, dynamic shear rheology by ASTM D7175, elastic recovery by ASTM D6084, and storage stability by EN 13399 with a maximum softening-point difference of 2.5 °C after 72 h at 163 °C. Terminal products include PG 76-22 and PG 82-22 polymer-modified binders, stone mastic asphalt mixtures, porous asphalt wearing courses, and stress-absorbing membrane interlayers. When the regional base bitumen differs from the qualification blend, published data for this specific configuration is limited, and plant-scale compatibility trials under EN 13399 are required before final binder approval.
At addition levels between 18 wt% and 28 wt% of total hot-melt formulation, Jusage SBS 4402 supplies the elastic recovery and shear holding power required for packaging tapes and label stock, while the diblock content affects melt viscosity at coating temperature. The melt is compounded in a heated sigma-blade mixer or a co-rotating twin-screw extruder with 36:1–48:1 L/D at 150–170 °C, with residence time above 170 °C held below 45 min to limit thermal degradation of the unsaturated butadiene segment. A representative formulation is 20–25 wt% Jusage SBS 4402, 45–55 wt% C5/C9 hydrocarbon tackifier, 15–25 wt% naphthenic or paraffinic oil, and 0.5–1.5 phr antioxidant. Melt viscosity is measured by ASTM D3236 or ISO 1133-1:2022 with a Brookfield thermosel or rotational rheometer at 160 °C; values outside 2,000–15,000 mPa·s are corrected by oil addition or tackifier grade before slot-die coating at 18–25 g/m². Loop tack and peel are evaluated by ASTM D6195 and ASTM D3330/D3330M, respectively. Terminal pressure-sensitive products include packaging tapes, double-sided mounting tapes, label stock, and hygiene film attachment adhesives. For indirect food-contact tapes, the formulated adhesive must satisfy FDA 21 CFR 175.105 and, where rubber articles are involved, FDA 21 CFR 177.2600; EU supply additionally requires REACH Annex XVII compliance for restricted PAH and plasticizer content. Production-scale experience indicates that low oil levels cause die-lip accumulation on slot-die coaters, while Jusage SBS 4402 loadings above 30 wt% can create a rubbery plateau that reduces tack and increases coating pressure.
In direct injection footwear sole production, Jusage SBS 4402 is typically compounded at 35–55 phr of the total polymer matrix, together with 20–40 phr general-purpose polystyrene, 15–40 phr naphthenic oil, and 5–15 phr calcium carbonate or silica filler. Fillers with moisture content above 0.1 wt% are pre-dried before extrusion to prevent surface voids and hydrolytic degradation. The dry blend is melt-kneaded in a co-rotating twin-screw extruder with 36:1–48:1 L/D and a barrel profile from 150 °C to 180 °C, pelletised, and then fed to an injection moulding machine with clamp forces of 120–250 t; the barrel temperature is held at 150–170 °C and the mould at 30–50 °C. The compound is tested for melt flow index under ISO 1133-1:2022 at 190 °C/5 kg, Shore A hardness under ASTM D2240, tensile strength under ASTM D638-14 or ISO 527-2, and abrasion resistance under ISO 4649. Shore A values between 55 and 75 are typical for general SBS/oil/PS sole compounds, with exact values controlled by oil content and polystyrene modification. Safety footwear outsoles must meet EN ISO 20345:2022 and slip resistance under EN ISO 13287; compression set is evaluated by ASTM D395-18 after 22 h at 70 °C. Terminal parts include direct-injection casual shoe outsoles, safety shoe outsoles, and lightweight midsoles in which Jusage SBS 4402 is blended with EVA or SEBS to reduce density. A production bottleneck observed on twin-screw lines is the increase in melt pressure when oil is dosed too early into the feed throat; oil injection is therefore shifted to a downstream barrel port to maintain throughput and prevent screw slip.
Modified-bitumen waterproofing membrane lines operate on a different rheological boundary than paving PMB because the base oxidised bitumen has higher viscosity and lower solvency for the styrene domains of Jusage SBS 4402. In this application, Jusage SBS 4402 is added at 8–12 wt% of the binder weight for torch-applied and self-adhesive membranes, with 10–14 wt% used when low-temperature flexibility below −15 °C is specified under EN 1109. The mixing stage uses a heated high-shear tank at 170–190 °C; after homogeneous dispersion is confirmed by fluorescence microscopy, the modified binder is transferred to an impregnation line that coats a polyester or glass-fibre carrier at 170–185 °C. Sheet thickness is set by a calender or knife-over-roll station at 3–5 mm, followed by immediate cooling, sand or slate surfacing, and polyethylene film release liners. Finished-sheet compliance is verified against EN 13707:2013 or ASTM D6164 for polymer-modified bitumen membranes, ASTM D5147 for sampling and testing, EN 1928 for watertightness, EN 1107-1 for dimensional stability, and EN 12310-1 for tear resistance. Terminal products include torch-applied SBS-modified bitumen membranes, self-adhesive sheet membranes, bridge deck waterproofing systems, and cold-applied underlayments. One production-scale limitation is the formation of gels in the impregnation tank if the binder is held above 190 °C for more than 2 h; batch records should therefore track cumulative thermal history rather than instantaneous temperature only.
Compounding of Jusage SBS 4402 into polypropylene or polyethylene impact-modified grades is carried out at addition ratios of 5–15 wt% on total compound, with the upper level limited by the onset of phase inversion that reduces tensile yield strength under ISO 527-2. The material is pre-dried only when hygroscopic fillers are present; the resin blend is fed at the main hopper of a co-rotating twin-screw extruder with 40:1 L/D, a melt temperature profile from 180 °C to 210 °C, and a screw speed of 250–450 min⁻¹. Downstream, the pellets are injection moulded at 190–220 °C into test specimens and parts; impact strength is checked by ISO 180:2023 or ASTM D256, flexural modulus by ISO 178:2019, and tensile properties by ISO 527-2:2012. For electrical and consumer goods applications, the compound must comply with RoHS 2011/65/EU for restricted substances and REACH Annex XVII for PAH limits; food-contact uses require specific migration testing under EU 10/2011, because published data for Jusage SBS 4402 in this specific configuration is limited. Terminal components include appliance housings, automotive interior trim, garden furniture, and non-structural electrical enclosures. Production-scale experience on 50–75 mm twin-screw extruders shows that Jusage SBS 4402 pellets should not be added through a side feeder after the melt temperature exceeds 200 °C, because pre-mature softening at the side feeder throat can cause bridging; main-hopper feeding with a gravimetric feeder is preferred.
Solventborne contact adhesive formulations based on Jusage SBS 4402 use 15–20 wt% total solids, with the polymer dissolved in a solvent blend of toluene, hexane, and ethyl acetate where the aromatic content is held just high enough to keep the styrene domains solubilised. The dissolving vessel is a high-torque dissolver with nitrogen inerting and a jacket temperature below 45 °C; the mix is stirred until the Brookfield viscosity stabilises between 2,000 mPa·s and 8,000 mPa·s at 25 °C, depending on spray or roller coating. Tackifier resin, typically a rosin ester or C5 hydrocarbon resin, is added at 10–15 wt% of total formula to adjust open time and tack. Coating methods include roller coating for panel lamination, air-assisted spray for automotive headliners, and brush application for site adhesive work. The adhesive must meet ASTM D3330/D3330M for peel adhesion, ASTM D412 for tensile properties of the dried film, ASTM D3828 for flash point, and ASTM D3130 for solvent delivery volatility where applicable; EU supply requires CLP labelling and REACH Annex XVII compliance for toluene and cyclohexane restrictions. Terminal products include furniture lamination adhesives, construction panel adhesives, automotive headliner spray adhesives, and footwear repair cements. On production lines, the main batch-to-batch variance is caused by solvent evaporation during long mixing cycles; viscosity is therefore adjusted after 24 h ageing at 25 °C, not immediately after polymer dissolution.
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Jusage SBS 4402 is a linear styrene-butadiene-styrene block copolymer supplied in dense pellet or crumb form. The sequential anionic polymerisation route used for the 4402 class produces a tri-block architecture in which polystyrene end-blocks phase-separate into physical crosslink domains. The nominal styrene content is 40 ± 2 wt%; this positions the grade as medium-high styrene relative to 30 wt% lower-styrene SBS and >45 wt% styrenic reinforcing grades. The butadiene mid-block has a 1,2-vinyl fraction typically below 12 mol%. The polystyrene domains soften near 90–100 °C, while the butadiene phase retains low-temperature flexibility above approximately -85 °C. Because published grade-specific data for Jusage SBS 4402 outside the supplier batch certificate is limited, the following table is a 4402 class screening profile and not a guaranteed specification.
| Property | Screening range or value | Test method |
|---|---|---|
| Styrene content | 40 ± 2 wt% | Supplier FTIR calibrated with certified styrene-butadiene reference materials |
| Melt mass-flow rate | 0.5–5.0 g/10 min at 5 kg, 200 °C | ISO 1133-1:2022 |
| Tensile strength | ≥ 18 MPa | ISO 37:2017 |
| Elongation at break | ≥ 700% | ISO 37:2017 |
| Hardness | 70–80 Shore A | ISO 868:2003 |
| Density | 0.94–0.96 g/cm³ | ISO 1183-1:2019 |
| Diblock content | ≤ 10 wt% | Supplier size-exclusion chromatography |
| Volatile matter | ≤ 1.0 wt% | ISO 248-1:2011 |
The 40 wt% styrene content differentiates Jusage SBS 4402 from lower-styrene SBS grades by increasing tensile modulus, hardness, and softening point at equal addition, but it narrows the compatibility envelope with fully naphthenic extender oils and raises minimum processing temperatures. Primary usage includes polymer-modified bitumen, thermoplastic elastomer compounds for footwear and injection-moulded goods, hot-melt and solvent-borne adhesives, and asphalt roofing membrane modification. The grade is not a drop-in replacement for SIS or SEBS. Compared with styrene-isoprene-styrene block copolymers, it gives lower hot-melt tack but higher tensile strength and abrasion resistance. Compared with hydrogenated SEBS, it provides stronger room-temperature oil gelation at equal concentration but lower thermo-oxidative and UV stability. Substitution trials are therefore required when replacing lower-styrene SBS, SIS, or SEBS in an existing formulation.
Storage of unopened Jusage SBS 4402 should be below 35 °C in a dry area away from direct sunlight. Opened packaging exposed to relative humidity above 60% should be consumed within 30 days or re-dried at 70 °C for 2 h before processing. Volatile matter and gel content are common causes of surface defects in moulded goods, so incoming inspection should include the tests listed above.
Melt mass-flow rate for Jusage SBS 4402 is measured at 200 °C under 5 kg load according to ISO 1133-1:2022. Declared lot values for the 4402 class commonly fall between 0.5 g/10 min and 5.0 g/10 min. A lower MFR correlates with higher molecular weight or lower diblock content and raises mixing torque in bitumen and compound applications; a higher MFR improves wetting of fillers and fibres but may reduce cohesive strength. The test is sensitive to residual moisture and thermal history. If opened bags are exposed to relative humidity above 60%, pre-drying at 70 °C for 2 h is applied before extrusion or moulding, and volatile matter is checked according to ISO 248-1:2011. Ash content by ISO 247-1:2018 should remain below 0.5 wt% for most adhesive and moulding applications. During twin-screw compounding with an L/D ratio of 40:1, the melt temperature is held below 220 °C; sustained operation above this threshold accelerates chain scission of the unsaturated mid-block and increases gel-particle formation. The 4402 designation does not by itself specify molecular weight distribution, so lot-specific MFR and solution viscosity should be obtained from the certificate of analysis. Published data correlating single-point MFR to final bitumen viscosity for this specific Jusage grade is limited, so incoming target windows should be established from retained plant samples and validated against EN 13302:2018 viscosity measurements.
In polymer-modified bitumen, Jusage SBS 4402 is dispersed in a high-shear mixer at 175–185 °C. Typical polymer addition is 3–5 wt% based on binder mass. The rotor-stator mill operates with a gap of 0.2–0.5 mm and a tip speed of 20–25 m/s. At 40 wt% styrene, the grade develops a physical polymer network faster than a 30 wt% styrene SBS; this translates to a higher dynamic viscosity at 135 °C under EN 13302:2018 for the same addition and frequently allows a lower polymer dosage to reach a specified softening point under EN 1427:2015. The same network raises mixing torque. If the binder temperature falls below 170 °C or the mixing time is shorter than 30 min, undispersed gel specks can remain and fail the storage-stability test. A second-stage low-shear agitation at 150–160 °C permits polymer swelling without excessive oxidation.
Storage stability is assessed according to EN 13399:2017 by comparing ring-and-ball softening points between top and bottom thirds of a conditioned sample. Modified binders based on the 4402 class generally target a difference of ≤ 5 °C. Values above this threshold indicate incomplete polymer dispersion, an incompatible extender oil, or oxidative crosslinking during production. Production-scale silos handling SBS-modified binders at 180 °C are often nitrogen-blanketed to reduce oxygen contact; otherwise the unsaturated mid-block can crosslink and raise storage-stability failure rates. Performance-graded binder testing under AASHTO M 320 and framework specification EN 14023:2010 includes penetration by EN 1426:2015, softening point by EN 1427:2015, and low-temperature stiffness. The higher styrene content may shift the low-temperature performance grade stiffer than lower-styrene SBS at equal addition, but the exact shift depends on the base bitumen source. Formulators therefore adjust oil extension or polymer loading only after verifying storage stability and low-temperature cracking resistance.
Solvent-borne and hot-melt adhesive formulations incorporating Jusage SBS 4402 require separate solvation of the polystyrene end-blocks and the polybutadiene mid-block. The 40 wt% styrene content raises solution viscosity and room-temperature cohesive strength but narrows the tackifying window with aliphatic C5 resins and rosin esters. A starting pressure-sensitive adhesive formula may contain 25–35 phr of the SBS grade, 80–120 phr of a mid-block-compatible tackifier, and 20–40 phr of a naphthenic or paraffinic oil. Loop tack is measured under ASTM D6195; peel adhesion is measured under ASTM D3330. Final viscosity of solvent adhesives is typically controlled below 5,000 mPa·s at 25 °C for knife or comma coating.
Footwear compounds based on Jusage SBS 4402 are mixed with polystyrene, oil, and silica in an internal mixer or corotating twin-screw extruder with L/D 40:1. Dump temperature is held at 150–170 °C to avoid premature oxidation of the butadiene segment. Compared with SIS, SBS 4402 displays lower hot-melt tack but higher tensile strength and abrasion resistance, making it better suited to unit soles, sheet goods, and sidewalls than to low-temperature pressure-sensitive label applications. Compared with SEBS, SBS 4402 swells more readily in aliphatic solvents and may not be suitable for gaskets or seals exposed to hot aliphatic oils. The unsaturated mid-block also limits continuous service temperature in air to approximately 80–100 °C unless additional stabilisers are used.
Compounds based on Jusage SBS 4402 are injection moulded with the feed throat held below 50 °C and the compression and metering zones set between 160 °C and 195 °C. Nozzle temperature is maintained at 200–210 °C. The lower boundary is set by the polystyrene end-block glass transition, and the upper boundary is controlled by the thermal sensitivity of the butadiene mid-block; sustained melt temperatures above 220 °C produce chain scission, gas generation, and gel defects. Mould temperatures between 20 °C and 50 °C accelerate physical crosslinking and reduce cycle time. On hydraulic injection moulding machines with clamp force between 800 kN and 1,200 kN, injection pressure for standard wall sections typically falls in the 60–80 MPa range. Screw speed is kept below 100 min⁻¹ to limit shear heating. Shrinkage of unfilled SBS compounds can reach 1.5–2.5% depending on wall thickness and gate design; determination follows ISO 294-4:2018. Weld lines in high-styrene SBS compounds are sites of tensile weakness, so gate placement should move weld lines away from flexing regions. Published data for this specific Jusage grade in microcellular foaming or gas-assisted injection moulding is limited.
Thermal-oxidative resistance of Jusage SBS 4402 is controlled by the unsaturation of the butadiene mid-block. Compounds intended to retain tensile strength after oven ageing at 70 °C for 168 h under ISO 188:2023 are stabilised with a hindered phenolic antioxidant at 0.1–0.3 phr and a phosphite secondary antioxidant at 0.1–0.2 phr. Outdoor applications add carbon black at 2–3 phr or a UV absorber package; unprotected SBS loses surface integrity rapidly under xenon-arc exposure per ISO 4892-2:2013. The raw polymer is generally supplied without intentionally added lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE, bringing it within the materials scope of Directive 2011/65/EU, but final article compliance depends on the complete formulation. REACH obligations under Regulation EC No 1907/2006 are evaluated by the downstream formulator for compounds imported or placed on the EU market. Food-contact uses may fall within 21 CFR 177.1810, but migration testing is required because residual oil, tackifier, or processing aids can alter overall migration. Compared with hydrogenated SEBS, Jusage SBS 4402 is less suited to prolonged outdoor exposure without carbon black and to hot potable-water seals requiring chlorine resistance. For these boundary applications, end-use validation is required rather than reliance on supplier declarations alone.
