LCY Chemical Huizhou Globalprene® SBS 3501F
- Product Name: LCY Chemical Huizhou Globalprene® SBS 3501F
- 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 Huizhou Globalprene® SBS 3501F is typically used in formulations when styrene content and melt flow rate must be controlled within specific ranges.
| HS Code | 198733 |
| Polymer Type | Styrene-Butadiene-Styrene (SBS) block copolymer |
| Structure | Linear |
| Bound Styrene Content | 31% |
| Density | 0.94 g/cm³ |
| Melt Flow Rate | 1.5 g/10 min (200°C/5 kg) |
| Hardness | 75 Shore A |
| Tensile Strength | ≥22 MPa |
| Elongation At Break | ≥700% |
| 300 Modulus | ≥2.0 MPa |
| Volatile Matter | ≤0.5% |
| Ash Content | ≤0.2% |
| Oil Content | 0% |
| Appearance | White to off-white pellets |
As an accredited LCY Chemical Huizhou Globalprene® SBS 3501F factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg net bags, palletized and stretch-wrapped: LCY Chemical Huizhou Globalprene® SBS 3501F. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with LCY Chemical Huizhou Globalprene® SBS 3501F, 25 kg bags, palletized, shrink-wrapped, secured for export. |
| Shipping | LCY Chemical Huizhou Globalprene® SBS 3501F is shipped as solid thermoplastic elastomer pellets in moisture-barrier bags or FIBCs. It is generally non-hazardous for transport; keep dry, away from heat and sunlight, and avoid contamination. Use clean, dry, covered trucks or containers. |
| Storage | Store in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, flames, and strong oxidizers. Keep containers or packages tightly closed and protect from moisture, dust, and physical damage. Avoid prolonged high temperatures and UV exposure. Maintain good housekeeping, prevent static buildup, and use first-in/first-out stock rotation. |
| Shelf Life | Typically 24 months in original sealed packaging, stored dry, away from direct sunlight, and below 30°C. |
In hot-applied bituminous waterproofing membrane lines using high-shear inline mixers, LCY Chemical Huizhou Globalprene® SBS 3501F is dosed at 6–10 wt% of the final blend. Oxidized bitumen is preheated to 160–170°C before the polymer enters the mixer. A rotor-stator mixer with tip speed above 15 m/s is required to break the styrene endblock clusters. Dispersion below 8 m/s leaves visible gel specks in the calendered membrane and produces phase separation during 24 h standing at 160°C. Aromatic process oil at 2–4 phr is introduced after the polymer is fully dispersed. Oil levels above 6 phr plasticise the styrene domains and reduce tensile retention after heat ageing when tested under ASTM D5147. Softening point is measured by ASTM D36/D36M, penetration under ASTM D5/D5M, flow resistance at elevated temperature under EN 1110, and low-temperature flexibility under EN 1109. The finished sheet must meet EN 13707 for roof waterproofing. Terminal products are torch-applied and self-adhered roofing underlayments and bridge deck membranes. Pre-drying of SBS 3501F is required when ambient RH exceeds 60% because residual moisture generates steam in the bitumen and causes foaming. Mixing must not exceed 190°C; above this threshold chain scission increases melt viscosity drift and gel formation.
| Control Parameter | Range / Requirement | Test / Equipment |
|---|---|---|
| SBS 3501F dosage | 6–10 wt% | Gravimetric weighbridge |
| Mix temperature | 160–170°C | Immersion thermocouple |
| Minimum rotor tip speed | >15 m/s | Inline rotor-stator mixer |
| Softening point | 95–115°C | ASTM D36/D36M |
| Low-temperature flexibility | −10 to −20°C | EN 1109 |
| Storage stability, Δ softening point | ≤2.5°C | ASTM D7173 |
What Limits SBS 3501F Loading in Polymer-Modified Asphalt for Dense-Graded Pavements?
Binder viscosity and phase angle, not mixing torque, define the effective loading window. The practical dosage is 3.5–5.5 wt% of total binder. At 3.0 wt%, the dynamic shear rheometer phase angle at 76°C remains above 55°, and elastic recovery under ASTM D6084 falls below 50%. At 5.0 wt%, the phase angle typically falls below 45°, depending on base crude. Softening point measured under ASTM D36/D36M rises from 46–52°C for unmodified binder to 68–85°C after high-shear mixing at 175–185°C. Mixing below 170°C fails to swell the polybutadiene midblock; mixing above 195°C accelerates oxidative chain scission and gel formation. A Siefer mill or rotor-stator mixer operating at 3,000–5,000 rpm for 45–90 min is common in batch plants. Sulfur-based stabilizer at 0.05–0.15 wt% reduces storage separation; additions above 0.2 wt% induce gelling and loss of workability. Separation tendency tested under ASTM D7173 must show a softening point difference between top and bottom samples no greater than 2.5°C. Multiple stress creep recovery under AASHTO T350 at 3.2 kPa is typically specified below 0.5 kPa⁻¹ for high-traffic grades. The modified binder is graded under AASHTO M 332 and should meet the PG 76-22 or PG 82-22 category depending on climate. Terminal products are dense-graded hot-mix asphalt and stone mastic asphalt for heavy-duty highways and airport aprons.
Compounding of SBS 3501F into injection-moulded footwear outsoles proceeds on co-rotating twin-screw extruders with L/D ratios of 36:1 to 44:1 and barrel zones set at 150–170°C. A typical compound contains 100 phr SBS 3501F, 30–50 phr general-purpose polystyrene, 20–40 phr naphthenic oil, and 5–15 phr calcium carbonate. Polystyrene content controls hardness from 55 Shore A to 90 Shore A, measured by ASTM D2240. Naphthenic oil addition above 50 phr increases abrasion loss above 250 mm³ under DIN 53516 and also lowers tear strength. The compound is pelletized under water-ring cutting; pellets must be dried to less than 0.1% moisture before moulding. Injection moulding requires a clamp force of 120–180 t for multi-cavity outsoles. Melt temperature must remain below 190°C at the nozzle; higher temperatures cause black specks and viscosity breakdown. Mould temperature is held at 20–40°C. Post-moulding shrinkage after 24 h is 0.8–1.4% in the flow direction. Tensile strength under ASTM D412 should exceed 10 MPa and elongation at break should exceed 500% for footwear soles. Terminal products include safety footwear outsoles, fashion soles, and expandable midsoles. REACH Annex XVII restrictions for consumer goods apply to polycyclic aromatic hydrocarbons and phthalates in the finished compound.
Hot-Melt Pressure-Sensitive Adhesive Viscosity Windows
Formulation starts with 100 phr SBS 3501F, 80–120 phr C5 tackifying resin, and 20–40 phr naphthenic oil. Application viscosity at 170°C is targeted at 8,000–20,000 mPa·s under ASTM D3236. Below 7,000 mPa·s, the adhesive mass bleeds from the siliconized polyethylene release liner. Above 25,000 mPa·s, slot-die coating produces ribbing and transfer voids at line speeds over 80 m/min. Mixing is performed in a vertical twin-blade mixer under nitrogen at 150–165°C for 60–90 min. Hindered phenol antioxidant is added at 0.5–1.0 phr to limit viscosity drift. The styrene endblock concentration should remain above 20 wt% of the total formulation to maintain cohesive strength. Peel adhesion at 180° on stainless steel per PSTC-101 is typically 12–25 N/25 mm. Loop tack under ASTM D6195 is 15–30 N/25 mm. Shear adhesion failure temperature under ASTM D4498 is typically 65–80°C. Terminal products are automotive interior attachment tapes, diaper tab adhesives, and floor marking tapes. FDA 21 CFR 175.125 applies for indirect food-contact labels only if all tackifier and oil components also comply. Processing above 180°C causes gel formation and char on the coating die; the melt should be filtered through a 100–200 mesh screen before slot-die coating.
When SBS 3501F replaces styrene-isoprene-styrene in butyl-based construction joint tapes, the compound is processed at 120–140°C because the styrene domains soften above 100°C and the polybutadiene segments degrade above 170°C. A formulation includes 100 phr SBS 3501F, 100–150 phr polyisobutylene, 40–70 phr hydrocarbon resin, and 3–5 phr fumed silica. The fumed silica controls cold flow; without it, 24-h cold flow exceeds 5 mm at 70°C under ASTM D2202. Tensile lap shear on aluminium under ASTM D1002 is 0.5–1.2 MPa. After 7 days at 70°C, lap shear retention should be at least 80% of initial value. The tape remains flexible at −20°C with a 10 mm bend radius without cracking. Terminal products are sealing tapes for roofing penetrations, window flashing, and automotive door liners. Compliance with ASTM D1970 for nail sealability applies to self-adhered flashing products. Aromatic resin above 70 phr raises peel strength but reduces low-temperature flexibility; aliphatic resin below 40 phr lowers cohesive failure temperature.
SBS 3501F Dispersed as an Impact Modifier in Compression-Moulded Recycled Polystyrene Sheet
Addition of 10–20 wt% SBS 3501F to post-industrial polystyrene regrind improves notched Izod impact resistance under ASTM D256 from 12–16 J/m to 35–70 J/m, depending on rubber domain size. Dispersion requires a co-rotating twin-screw extruder at 175–190°C with a screw speed of 300–400 rpm. Rubber domain size below 0.5 µm is achieved only when a 10:1 distributive mixing block is included; absence of the mixing block produces elongated domains above 2 µm and notched Izod values below 25 J/m. The compounded sheet is calendered at 160–170°C. Terminal products include refrigerator inner liners, stationery folders, and packaging trays. Pre-drying of recycled polystyrene is required when ambient RH exceeds 60% to prevent steam-induced voids. Compliance with REACH and RoHS limits residual styrene monomer and heavy metals. Published data for this specific SBS 3501F configuration is limited; the impact performance cited is representative of triblock SBS-modified polystyrene systems and should be confirmed on production equipment.
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- LCY Chemical Huizhou Globalprene® SBS 3501F 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 Huizhou Globalprene® SBS 3501F is a linear styrene-butadiene-styrene block copolymer supplied as a free-flowing porous pellet. The polymer consists of polystyrene end blocks joined by a polybutadiene midblock; the styrene content is reported as 31 wt% when measured by ASTM D5775 or an equivalent infrared procedure. This block architecture produces a two-phase morphology in which the polystyrene domains act as physical crosslinks below the glass transition temperature of polystyrene, while the polybutadiene midblock contributes elastomeric recovery. The grade is not vulcanised. Mechanical properties are obtained from compression-moulded specimens and tested according to ASTM D638 at 500 mm/min. Representative values from LCY product literature include a tensile strength of 18 MPa, an elongation at break of 700%, a 300% modulus of 2.5 MPa, and a hardness of 72 Shore A per ASTM D2240. Melt flow rate is measured under a 5 kg load at 190 °C according to ISO 1133-1 and is specified at 5 g/10 min. Specific gravity is 0.94 per ASTM D792. The current certificate of analysis should be consulted for lot-specific values.
| Property | Test Method | Representative Value |
|---|---|---|
| Styrene content | ASTM D5775 | 31 wt% |
| Melt flow rate | ISO 1133-1 | 5 g/10 min at 190 °C/5 kg |
| Tensile strength | ASTM D638 | 18 MPa |
| Elongation at break | ASTM D638 | 700% |
| 300% modulus | ASTM D638 | 2.5 MPa |
| Hardness | ASTM D2240 | 72 Shore A |
| Specific gravity | ASTM D792 | 0.94 |
What Distinguishes 3501F from Oil-Extended and Radial SBS Grades?
Relative to oil-extended SBS grades, 3501F contains no paraffinic or naphthenic extender oil. This preserves cohesive strength and reduces migration in polymer blends; oil-extended grades typically show Shore A hardness values 10–15 points lower and higher melt flow because of the plasticising oil, but can exude oil at high addition levels. 3501F is a linear SBS. Its melt flow rate of 5 g/10 min is higher than many neat linear SBS grades intended for asphalt modification and lower than high-flow radial grades. Compared with radial SBS types, the linear architecture of 3501F gives lower melt elasticity and lower die swell, which is advantageous in profile extrusion and injection moulding. Radial SBS grades generally provide higher elastic recovery and higher molecular weight, but require higher processing torque and can show higher melt viscosity. The butadiene midblock in 3501F has a 1,4-addition content typical of solution-polymerised SBS; published data for the specific vinyl content in this configuration is limited. Because the product is not oil-extended, formulators can select the type and amount of extender oil independently rather than being constrained by the oil content already present in the polymer.
During asphalt binder modification, 3501F is dispersed into paving-grade bitumen at 175–185 °C in a high-shear rotor-stator mixer. The recommended polymer addition is 3–6 wt% of the binder, with mixing tip speeds between 18 m/s and 25 m/s for 45–90 min depending on bitumen source. After digestion, the modified binder typically exhibits an increase in softening point of 20–30 °C over the base bitumen when tested according to ASTM D36, and a reduction in penetration at 25 °C measured by ASTM D5. Elastic recovery after 10 cm elongation at 25 °C per ASTM D6084 is commonly above 80% for 4 wt% polymer addition. Storage stability must be verified by the tube test method EN 13399 or ASTM D7175, because linear SBS without reactive crosslinking can phase-separate in bitumen with high asphaltene content. Addition of 0.1–0.2 wt% sulfur or a sulfur donor can stabilise the morphology, but the mixing temperature must remain below 190 °C to avoid premature gelation. Published data for 3501F in low-wax bitumen from specific crude slates is limited; plant trials should confirm separation temperature and low-temperature cracking behaviour.
When 3501F Is Compounded Through a 40:1 L/D Co-Rotating Twin-Screw Extruder at 180–200 °C
Barrel temperatures are set with a flat profile of 180–200 °C, and screw speed is maintained at 250–350 rpm to control melt temperature below 210 °C. Feed rate depends on screw diameter; for a 40 mm extruder, throughput of 20–30 kg/h is typical without oil injection. Because the pellets are porous, the feed throat should be kept below 40 °C to prevent pellet bridging. Polystyrene block domains remain intact under these conditions, and residence time should not exceed 90 s to limit thermal degradation. Melt pressure measured before the die is typically 6–12 MPa. Processors adding 3501F to polypropylene at 10–20 wt% for impact modification observe an increase in Charpy notched impact strength when tested according to ISO 179-1, but the effect depends on the viscosity ratio of the polypropylene matrix. A twin-screw extruder with distributive mixing elements is preferred over a single-screw extruder because the dispersed SBS particle size controls low-temperature impact efficiency. If melt temperature exceeds 230 °C, the polybutadiene midblock can undergo crosslinking or gel formation, which appears as hard specks in extrudate and raises screen-pack pressure.
Footwear unit soles are injection-moulded with 3501F at barrel temperatures of 160–190 °C and mould temperatures of 20–40 °C. Injection pressure at the machine nozzle is typically 60–90 MPa using a 1200 kN clamp force machine for multi-cavity sole moulds. Because 3501F is a neat linear SBS with a hardness of 72 Shore A, abrasion resistance of the finished compound tested according to DIN 53516 is typically below 250 mm³ volume loss for unfilled formulations; the exact value depends on filler and plasticiser loading. Cycle time is controlled by solidification of the polystyrene domains, and ejection can occur when the mould temperature is below the glass transition of the styrene phase. Compounds containing 3501F are often blended with polystyrene or high-styrene SBS to increase hardness to 80–90 Shore A for sports shoe outsoles. Pre-drying at 70 °C for 2 h is recommended when pellets have been stored above 60% relative humidity. If surface moisture is not removed, splay marks and inconsistent shot weight occur because moisture vaporises at the melt front.
Adhesive Formulation Variables and Solvent Release from Linear SBS
Contact adhesives based on 3501F are typically prepared at 15–25 wt% solids in a solvent blend of toluene, ethyl acetate, and aliphatic hydrocarbon. Solution viscosity at 25 °C and 20 wt% solids is governed by the molecular weight of the polybutadiene midblock and the polystyrene association; published data for this specific concentration is limited. Open time after coating is influenced by the evaporation rate of the solvent blend, and initial bond strength develops after the solvents are flashed off and the polystyrene domains re-form. Peel strength on aluminium substrates, tested according to ASTM D903, is commonly reported in the range of 2–4 N/mm for 20 wt% solutions, but the result depends on coating weight and substrate surface preparation. Solvent retention after lamination can plasticise the polybutadiene midblock and delay final strength; forced-air drying at 40–60 °C for 10–20 min is used. 3501F can be compounded with tackifying resins such as C5 hydrocarbon resins at 20–50 phr, but the ratio of styrene endblock resin to midblock resin must be balanced to avoid loss of cohesive strength.
Regulatory declarations for 3501F are established under EU Regulation (EC) No 1907/2006 for REACH and Directive 2011/65/EU for RoHS restricted heavy metals and brominated flame retardants. The product is not classified as dangerous according to the Globally Harmonized System; the typical safety data sheet lists no acute toxicity hazard. For food-contact applications, compliance with 21 CFR 177.1810 for styrene block copolymers should be verified with the manufacturer’s specific confirmation because not all 3501-series grades are equivalence-listed. The material should be stored below 40 °C, away from direct sunlight and ignition sources, and should not be exposed to strong oxidising agents or excessive shear at temperatures above 230 °C. Pellet bags should be kept sealed when not in use to limit moisture uptake above the 0.1 wt% moisture specification.
