LCY Chemical Globalprene® SBS 3536
- Product Name: LCY Chemical Globalprene® SBS 3536
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- LCY Chemical Globalprene® SBS 3536 is typically used in formulations when styrene content and melt flow rate and processing temperature and shear rate must be controlled within specific ranges.
| HS Code | 829134 |
| Productname | LCY Chemical Globalprene® SBS 3536 |
| Chemicaltype | Styrene-butadiene-styrene block copolymer |
| Polymerstructure | Linear |
| Styrenecontent | 35 wt% |
| Butadienecontent | 65 wt% |
| Diblockcontent | 36 wt% |
| Density | 0.94 g/cm³ |
| Meltflowrate | 4.0 g/10 min (200°C/5 kg) |
| Shoreahardness | 70 |
| Tensilestrength | 20 MPa |
| Elongationatbreak | 700% |
| Volatilematter | ≤0.5 wt% |
| Ashcontent | ≤0.1 wt% |
| Antioxidant | Non-staining |
As an accredited LCY Chemical Globalprene® SBS 3536 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | LCY Chemical Globalprene® SBS 3536 is packaged in 25 kg bags, typically 40 bags (1,000 kg) per pallet. |
| Container Loading (20′ FCL) | 20′ FCL loading of LCY Chemical Globalprene® SBS 3536, palletized, stretch-wrapped, and securely stowed for ocean transport. |
| Shipping | LCY Chemical Globalprene® SBS 3536 is typically shipped in 25 kg bags or 1,000 kg jumbo bags, palletized and stretch-wrapped. It is a non-hazardous thermoplastic elastomer; keep dry, cool, ventilated, and away from direct sunlight, moisture, heat, and ignition sources. Follow local transport regulations. |
| Storage | Store in a cool, dry, well-ventilated warehouse, away from direct sunlight, UV radiation, heat, moisture, and ignition sources. Keep in original unopened packaging on pallets; avoid excessive stacking, physical damage, and contamination by dust, oils, or chemicals. Maintain temperatures below about 50 °C, store separately from incompatible materials, follow local regulations, and use oldest stock first. |
| Shelf Life | Typically 12 months under recommended storage conditions—dry, ventilated, original sealed packaging, away from direct sunlight and heat. |
Membrane-grade oxidized bitumen with a ring-and-ball softening point of 85–100°C and penetration of 25–40 dmm at 25°C per ASTM D5-13 serves as the continuous phase into which LCY Chemical Globalprene® SBS 3536 is dispersed at 10–14 wt% of the compound. The 35 wt% bound styrene content of the polymer increases the cohesive strength of the bituminous matrix after the blend passes through a rotor-stator high-shear mixer at 170–185°C for 45–90 min; production-scale batches with tip speeds below 15 m/s routinely show swollen polymer clusters that appear as raised surface defects on the finished waterproofing sheet. The resulting hot compound is calendered onto 100–250 g/m² polyester nonwoven or glass mat at net coating weights of 2.0–5.0 kg/m², and the finished sheet is tested for low-temperature flexibility at -15°C to -25°C per EN 1109 and flow resistance at 100°C per EN 1110. Export compliance for this application normally requires ASTM D6164-21 or EN 13969 declarations, with sampling performed under ASTM D5147-15; limestone filler is held at 20–30 wt% of the compound but is reduced when cold-climate flexibility must remain below -20°C. Terminal product types include torch-applied SBS cap sheets, self-adhesive underlayments, and bridge-deck waterproofing membranes.
What Causes Phase Inversion in Paving-Grade PMB at 5.0 wt% SBS Loading?
Paving-grade polymer-modified bitumen lines dosing SBS 3536 at 3.0–5.5 wt% on total asphalt exhibit a morphology shift from dispersed polymer particles to a continuous polymer-rich network between approximately 4.5 wt% and 5.5 wt%; on plant, this appears as a non-linear rise in softening point and stabilization of elastic recovery under EN 13398. The asphalt is preheated to 160–170°C, the polymer is metered into a high-shear mill at 3,000–6,000 rpm for 30–60 min, and digestion continues under low-shear agitation at 170–180°C for 60–120 min. Sulfur stabilizer at 0.1–0.3 wt% reduces the top-to-bottom softening point difference in the EN 13399 storage-stability tube to ≤5°C; exceeding 190°C during digestion oxidizes the unsaturated butadiene midblock and reduces elastic recovery below the national PMB class limit. Compliance is structured under EN 14023, and North American supply may reference ASTM D5976 for polymer-modified asphalt. Terminal products include PMB for stone mastic asphalt wearing courses, porous asphalt binders, polymer-modified chip seal emulsions after secondary emulsification, and bridge-deck waterproofing binders.
| Property | Test standard | Batch-control note |
|---|---|---|
| Penetration at 25°C | EN 1426 | Class target set by national authority |
| Softening point | EN 1427 | Monitored for phase inversion shift |
| Elastic recovery | EN 13398 | Minimum set by PMB class |
| Storage stability | EN 13399 | ΔR&B between top and bottom ≤5°C |
Solvent-borne polychloroprene contact adhesives modified with SBS 3536 at 10–30 wt% of total solids are compounded in closed-top high-shear dissolvers running at 500–1,000 rpm; toluene, MEK, and ethyl acetate blends are used to maintain solution viscosity at 2,000–5,000 mPa·s at 25°C per ASTM D2196. Tackifier addition is held at 20–40 phr based on rubber, with aromatic hydrocarbon resin kept below 25 phr because higher aromatic content reduces open time and increases cold-flow in the dried adhesive film. The wet adhesive is applied at 150–250 g/m², flash-dried at 20–25°C for 3–5 min, and nip-roll laminated at 0.4–0.8 MPa. Regulatory compliance includes Directive 2004/42/EC category II.1 for VOC content and EU REACH Annex XVII screening for restricted solvent content; the applicable restriction entry depends on the solvent blend selected. Peel adhesion after 7 days is verified under ASTM D903-17, and creep resistance under ASTM D2294-96. Terminal products include flexible packaging laminates, construction panel adhesives, and foam-to-substrate bonding.
Hot-Melt PSA Viscosity Build: Tackifier Aromaticity and Oil Partitioning Limits
For hot-melt pressure-sensitive adhesive formulations based on SBS 3536, the polymer content is maintained at 25–35 wt%, tackifier content at 45–55 wt%, paraffinic or naphthenic oil at 10–20 wt%, and hindered phenolic antioxidant at 0.5–1.0 wt%. The mixture is processed in a sigma-blade kneader or twin-screw extruder at 160–180°C under a nitrogen blanket; Brookfield viscosity is held at 2,000–15,000 mPa·s at 180°C per ASTM D3236. Tackifier aromaticity above 20% of total resin weight raises viscosity and cohesive strength but narrows the slot-die coating window because the aromatic fraction preferentially solvates the styrene domains and retards stress relaxation. Slot-die coating at 160–180°C onto 60–100 µm siliconized release liner is followed by transfer lamination of 20–40 g/m² adhesive onto paper or film facestocks. Peel adhesion at 180° to stainless steel is determined under ASTM D3330-23, loop tack under ASTM D6195-19, and shear adhesion failure temperature under ASTM D4498-07 with a 0.5 kg load and 2°C/min ramp. In indirect food packaging adhesive applications, FDA 21 CFR 175.105 provides the regulatory route only when all tackifiers, oils, and stabilizers meet that section; published data for this specific formulation configuration is limited at oil loadings above 20 wt%. Terminal products include pressure-sensitive labels, carton-sealing tapes, and disposable hygiene attachment adhesives.
When SBS 3536 is used as the sole elastomer in footwear soling compounds, the formulation is set at 100 phr polymer, 30–50 phr general-purpose polystyrene, 10–25 phr paraffinic process oil, 20–50 phr calcium carbonate, 0.5–1.5 phr zinc stearate, and 0.3–0.8 phr phenolic antioxidant. The batch is discharged from an internal mixer at 120–150°C after 5–8 min, sheeted on a two-roll mill at 70–90°C, and injection molded at 160–190°C with a mold temperature of 20–30°C and injection pressure of 80–120 MPa. When ambient relative humidity exceeds 60%, calcium carbonate is pre-dried at 90–110°C for 2–4 h to keep compound moisture below 0.1% and prevent surface splay in molded soles. Compound targets include DIN 53505 Shore A hardness of 55–70, ISO 37 tensile strength of 12–18 MPa, and ISO 34 trouser tear strength of 15–25 kN/m. Regulatory control follows REACH Annex XVII entries 50, 51, and 52 for PAHs and phthalates in consumer footwear, and EN 71-3 migration limits apply when soles are intended for children’s products. Terminal products include casual shoe outsoles, sandal soles, and slipper soles.
When SBS 3536 Replaces Impact Modifier in Polystyrene Compounds
In intermeshing co-rotating twin-screw extruders with L/D ratios of 32:1–40:1, SBS 3536 is compounded into general-purpose polystyrene at 5–20 wt% with barrel temperatures of 180–220°C and screw speeds between 250 rpm and 400 rpm to disperse the butadiene-rich phase without severe chain scission. At loadings above 15 wt%, melt flow rate measured by ISO 1133-1:2022 at 200°C/5 kg drops sharply on production extruders; published data for this specific configuration is limited, so the melt flow target is normally set by the injection molder’s minimum spiral-flow requirement rather than a fixed grade specification. Barrel zones above 220°C increase gel formation on the die lips, and the resulting die-lip build-up is managed by interval cleaning based on extruder torque rise. Notched Izod impact is characterized according to ISO 180, flexural modulus according to ISO 178, and heat deflection temperature according to ISO 75-2. The application is limited to non-food-contact injection molded goods because residual butadiene unsaturation and hydrocarbon oil migration restrict fatty-food suitability; UL 94 HB is commonly specified for electronic accessory housings, while EN 71-3 migration limits are tested for toy components. Terminal products include non-food-contact housewares, hangers, toy components, and office equipment housings.
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- LCY Chemical Globalprene® SBS 3536 is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
LCY Chemical Globalprene® SBS 3536 is a linear styrene-butadiene-styrene block copolymer produced by organolithium-initiated anionic polymerisation. The molecular architecture consists of glassy polystyrene end-blocks and an unsaturated polybutadiene midblock. The polystyrene domains act as physical cross-links that dissociate above 100°C and re-form upon cooling, giving the material its thermoplastic processing character without vulcanisation. The polybutadiene midblock provides elastomeric recovery and low-temperature flexibility, but its residual unsaturation also requires stabilisation against thermo-oxidative degradation. The grade is supplied as solid porous pellets and is typically compounded with hindered phenolic antioxidants at 0.1–0.5 phr to control degradation during high-temperature processing.
Because the bound styrene content is reported as 35 wt% by ASTM D5775, Globalprene SBS 3536 occupies an intermediate position between lower-styrene SBS grades and high-styrene types such as Globalprene 3546. The lower polystyrene volume fraction reduces room-temperature stiffness and increases melt flow relative to higher-styrene grades, while retaining sufficient endblock association for tensile strength and elastic recovery. The trade-off between melt processability and service stiffness is a primary selection criterion when this grade is evaluated against non-oil-extended and oil-extended styrene block copolymers.
What specification values define Globalprene SBS 3536?
The manufacturer’s technical datasheet lists typical physical properties determined on homogenised compression-moulded specimens. Lot-specific values are governed by the certificate of analysis and should be used for acceptance testing. The tabulated values below are not absolute batch limits, but they establish the grade profile against standardised test methods.
| Property | Test method | Typical value |
|---|---|---|
| Bound styrene content | ASTM D5775 | 35 wt% |
| Specific gravity | ASTM D792 | 0.94 |
| Melt mass-flow rate, 190°C/5 kg | ASTM D1238 | 5.0 g/10 min |
| Tensile strength, Type 2 dumbbell, 500 mm/min | ISO 37 | 17.7 MPa |
| Elongation at break | ISO 37 | 600% |
| Hardness, 15 s reading | ASTM D2240 | 70 Shore A |
The melt mass-flow rate of 5.0 g/10 min at 190°C under 5 kg load indicates a lower-viscosity SBS type than many non-oil-extended grades used in extrusion. That flow enhancement is accompanied by a lower Shore A hardness and lower room-temperature modulus than high-styrene SBS products. In applications where dimensional stability at elevated temperature is dominant, a higher-styrene grade should be evaluated instead. Published data for direct comparative creep resistance between Globalprene SBS 3536 and high-styrene LCY grades is limited; selection therefore requires application-specific test programmes under load and temperature.
Rheological response and shear-heating limits in twin-screw compounding
Compounding of Globalprene SBS 3536 is performed on co-rotating intermeshing twin-screw extruders with screw length-to-diameter ratios between 40:1 and 52:1. Barrel set-points are staged from 120°C in the feed zone to 180°C at the die. Melt-temperature readings above 200°C indicate excessive shear heating, insufficient screw cooling, or excessively restrictive die pressure. Because the polybutadiene midblock undergoes thermo-oxidative degradation at elevated temperature, melt temperature limits are treated as a process safety boundary. A processing window of approximately ±10°C around the mid-barrel set-point is often used because incomplete polymer melting and thermal degradation overlap at the lower and upper limits respectively.
Oil or plasticiser injection is delayed until the polymer is fully molten to reduce screw slip and torque fluctuation. In production-scale trials, premature oil injection into partially melted pellets causes load instability and inconsistent dispersion of stabilisers. The feed throat is water-cooled to prevent softening of pellets before the compaction zone. For filler loadings above 20 phr, downstream side-feeding is preferred to reduce barrel wear and local melt-temperature spikes. Batch-to-batch variation in dilute solution viscosity can shift screw fill and residence time distribution; torque limits on the extruder drive should be established with a safety margin of at least 10–15% below motor rating.
Pre-drying at 60°C for 2 h is applied when pellet surface moisture exceeds 0.1 wt%. Higher drying temperatures are avoided because pellet blocking can occur in hopper systems. The stabiliser package is normally based on hindered phenolic antioxidants; amine-based antioxidants are not required and may contribute to colour development. The compounded material should be cooled in a water bath and pelletised under conditions that avoid retained heat above 40°C in bulk packaging, since slow oxidative degradation of the unsaturated midblock can occur during warehouse storage in warm environments.
When Globalprene SBS 3536 is substituted for non-oil-extended block copolymers in injection-molded footwear components
Injection moulding with Globalprene SBS 3536 is conducted with barrel temperatures between 150°C and 180°C, with the nozzle set 5–10°C below the final barrel zone to reduce stringing and flashing. Mould temperatures of 20–40°C permit sufficiently rapid re-formation of the polystyrene domains during cooling. The higher melt-flow rate of the grade shortens fill time in multi-cavity tooling, but cavity-pressure transducers should be used to prevent overpacking. Overpacking produces gate blush, non-uniform shrinkage, and residual stress that can reduce flex fatigue resistance in footwear midsoles.
Linear mould shrinkage is assessed by ASTM D955; reported values for SBS grades commonly fall between 0.4% and 0.8%, depending on wall thickness, gate design, and holding pressure. Because the polystyrene endblock content of Globalprene SBS 3536 is lower than that of high-styrene SBS grades, post-mould hardness develops as the styrene domains age. Dimensional measurement should therefore be delayed until the specimen has cooled to room temperature and stabilised for at least 24 h. Published data for this specific grade in thin-wall footwear foaming operations is limited, and tooling prototypes should be evaluated with the intended blowing agent system to determine gas-loss effects on surface quality.
Substitution into skin-contact or enclosed footwear components requires emission testing under VDA 277 or ISO 12219, because residual oligomers and antioxidant byproducts vary with reactor grade and post-reactor finishing conditions. The grade is not a direct drop-in for higher-styrene SBS where upper service temperature is fixed by specification, because the lower polystyrene content reduces load-bearing capacity at elevated temperature.
In solvent-borne adhesive and sealant formulations, Globalprene SBS 3536 is solvated in cyclohexane, toluene, or aliphatic/aromatic hydrocarbon blends. Dissolution is controlled by the polystyrene endblocks, which must be solvated before the polybutadiene midblock disperses fully. Tackifier compatibility is formulation-critical: aliphatic C5 resins associate with the polybutadiene phase, while aromatic C9 resins and rosin esters interact with the polystyrene domains. Resin addition levels of 20–40 phr modify peel and loop tack, but excess aromatic resin plasticises the styrene domains and lowers the upper service temperature. Peel adhesion and shear resistance are evaluated according to ASTM D3163 or ASTM D1002 depending on substrate type and joint geometry.
Specific solution viscosity data should be obtained from the supplier for the target solvent composition; published data for this exact grade in low-VOC and high-solids systems is limited. The unsaturated midblock is incompatible with strong oxidising agents, and certain chlorinated solvents may promote degradation or gelation. Storage of compounded adhesives under nitrogen blanketing is used when extended shelf life beyond 6 months is required, because oxidative degradation can increase solution viscosity and reduce adhesive tack.
Polymer modification and asphalt binder storage stability
Globalprene SBS 3536 is evaluated as a bitumen modifier at addition levels of 3–5 wt% of binder mass. High-shear blending is carried out at 180°C for 4–6 h with a rotor-stator mill operating between 3,000 rpm and 5,000 rpm. The grade’s styrene content and molecular weight are positioned to balance elastic recovery against mixing viscosity. Higher-styrene SBS grades typically yield larger softening-point increments, but they demand higher mixing energy and may produce binders with higher viscosity at paving temperatures.
Storage stability is assessed by static hot storage at 163°C for 48–72 h using procedures such as EN 13399 or ASTM D7173. The difference in softening point between the top and bottom layers of a stored sample should remain below 2.5°C in a storage-stable formulation. Softening point is measured by ASTM D36 or EN 1427; elastic recovery by ASTM D6084; and high-temperature viscosity by ASTM D4402 using a Brookfield viscometer. Because the polybutadiene midblock is unsaturated, oxidation during extended hot storage can consume the stabiliser package and cause viscosity drift. Sealed blend tanks with nitrogen blanketing are specified to reduce oxidative ageing in plant-scale modifications.
Addition levels above 5 wt% may produce binder viscosity that exceeds construction workability limits and may require aromatic process oils. Such oils reduce the high-temperature performance grade of the binder and shift the rheological profile. Published data for Globalprene SBS 3536 in polymer-modified asphalt under long-term field ageing is limited; project-specific testing under AASHTO M 332 or regional performance-grade specifications is required before full-scale paving use.
