| HS Code | 270338 |
| Polymertype | Linear triblock styrene-isoprene-styrene copolymer |
| Appearance | White to light yellow powder or pellet |
| Styrenecontent | 15% (typical) |
| Isoprenecontent | 85% (typical) |
| Blockstructure | S-I-S |
| Diblockcontent | ≤1% |
| Molecularweight | 110,000 g/mol (typical) |
| Meltflowrate | 8-12 g/10 min (200°C, 5 kg) |
| Density | 0.92-0.94 g/cm³ |
| Hardness | 35-45 Shore A |
| Tensilestrength | ≥15 MPa |
| Elongationatbreak | ≥800% |
| Modulusat300percent | 1.5-2.0 MPa |
| Solutionviscosity | 1200-1800 mPa·s (25% in toluene, 25°C) |
| Volatilematter | ≤0.5% |
| Ashcontent | ≤0.2% |
| Tolueneinsoluble | ≤0.1% |
| Softeningpoint | 70-90°C |
As an accredited Jusage Styrene-Isoprene-Styrene (SIS) Block Copolymer 1100 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Jusage SIS 1100 is supplied in 25 kg sealed bags, with 40 bags per 1,000 kg pallet. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): Jusage SIS 1100 chemical securely loaded, labeled, and stowed in a sealed 20-foot full container load. |
| Shipping | Jusage SIS 1100 is typically shipped as a non-dangerous solid polymer in sealed original packaging—bags, drums, or IBCs. Store and transport in a cool, dry, ventilated area, protected from moisture, heat, and direct sunlight. Confirm transport classification and requirements against the current supplier SDS and local regulations. |
| Storage | Store Jusage SIS 1100 in a cool, dry, well-ventilated area away from direct sunlight, heat, moisture, and incompatible materials such as oxidizers. Keep containers tightly closed, upright, and clearly labeled. Use secondary containment to prevent leaks. Avoid freezing if applicable; maintain recommended temperature limits. Follow the manufacturer’s SDS for specific shelf life and handling precautions. |
| Shelf Life | Store in a cool, dry, well-ventilated place in original sealed containers; shelf life is typically 12 months from date of manufacture. |
When Jusage SIS 1100 is incorporated into hot-melt pressure-sensitive adhesive formulations at mass fractions between 20 wt% and 35 wt%, the mixing sequence exerts a measurable effect on shear adhesion failure temperature. The diblock content reported on the lot-specific certificate of analysis must be checked before setting mixing time because a higher diblock mass fraction lowers cohesive strength but improves tack and melt flow. A jacketed sigma-blade mixer with working volume of 200 L is heated to 160 °C–170 °C; the C5/C9 aliphatic hydrocarbon tackifier and naphthenic/paraffinic process oil are added first and homogenised for 20 min before the SIS 1100 pellets are introduced gradually under nitrogen flow to reduce oxidative chain scission. The polymer phase is dispersed at 40 rpm for 45–60 min; the melt is then filtered through a 100 µm screen to remove microgel particles that produce visible coating defects on release liner. Viscosity at 160 °C is monitored by ASTM D3236-88 with a Brookfield Thermosel SC4-27 spindle; acceptable hot-melt coating viscosity typically falls between 1,200 mPa·s and 3,500 mPa·s depending on oil content. The melt flow rate provided on the certificate of analysis under ISO 1133-1:2022 at 200 °C/5 kg is used to set extruder pump speed; a lot with higher melt flow can be processed at a barrel temperature reduced by 5 °C. Pressure-sensitive properties are determined after coating onto 36 µm PET film at 20 g/m² dry coat weight: loop tack is evaluated under ASTM D1876-08, and static shear holding power on stainless steel is measured with 1 kg load at 40 °C according to ASTM D3654/D3654M-06. The formulation threshold is sharp: when tackifier exceeds 120 phr, the peel–cohesion balance shifts to cohesive failure, and the shear adhesion failure temperature drops by more than 15 °C. Because SIS 1100 contains an unsaturated isoprene midblock, the addition of hindered phenolic antioxidant and phosphite in the range of 0.1–0.3 phr is required before the polymer has fully melted; otherwise gel formation is observed after 90–120 s of high-temperature residence time. Food-contact adhesive requirements for labels in indirect contact are assessed under FDA 21 CFR 175.125 and EU 10/2011 where applicable; the production line must also confirm that residual volatile levels remain below the defined migration limits of the final packaging article.
Solvent-borne pressure-sensitive adhesives based on SIS 1100 are typically prepared at 35–45% solids in a toluene/n-hexane or cyclohexane/acetone blend; the solvent mix is selected to keep the Hansen solubility parameter below the solubility sphere edge for the styrene blocks while dissolving the isoprene midblock. The solvated polymer is handled in a high-torque dissolver with jacket temperature at 35 °C–45 °C; viscosity after 24 h of mixing is controlled to 800–2,000 mPa·s by ISO 2555:2018. Coating onto PET or BOPP release liner uses a comma bar or slot-die coater at 18–22 g/m² dry coat weight, with line speed between 12 m/min and 25 m/min. The three-zone drying oven is set to 55 °C, 75 °C, and 95 °C; zone 3 must not exceed 110 °C for more than 30 s because the unsaturated midblock oxidises rapidly under high residual solvent conditions. The lower explosion limit is maintained below 25% LEL as required by 2014/34/EU, and additional interlocks are specified for 200 L mixing vessels where vapour accumulation occurs. Residual solvent after drying is quantified by headspace gas chromatography and should be below 50 µg/g for direct food-label constructions under FDA 21 CFR 175.105. The main failure mode on production lines is residual tack shift after ageing; this is traced to incomplete solvent removal rather than raw polymer variability when coat weight or line speed is increased beyond drying capacity.
The compliance matrix below summarises the principal testing and equipment boundary across the main downstream conversions for SIS 1100.
| Downstream segment | Primary standard designations | Critical measured property | Production equipment / boundary |
|---|---|---|---|
| Hot-melt PSA | ASTM D3236-88, ASTM D1876-08, ASTM D3654/D3654M-06 | Viscosity, loop tack, shear adhesion | Sigma-blade mixer 160–170 °C, 100 µm filtration |
| Solvent PSA | ISO 2555:2018, FDA 21 CFR 175.105 | Solution viscosity, residual solvent | Slot-die coater 12–25 m/min, 3-zone drying |
| Asphalt modification | AASHTO T 350, ASTM D7173-20, AASHTO T 313 | MSCR recovery, storage stability, low-temperature grade | High-shear mill 2,800–3,500 rpm, 175–185 °C |
| Cast film | ISO 527-3:2018, ASTM D6287 | MD elongation, gauge uniformity | Single-screw 30:1 L/D, draw ratio 6:1–8:1 |
| Footwear soling | ISO 17707:2017, ISO 4649:2021 | Flex fatigue crack initiation, abrasion | Hydraulic press 160–170 °C, 8–12 min |
In terminal blending of PG 76-22 asphalt with SIS 1100, the polymer is added at 3.0–4.5 wt% of total binder into a high-shear mill operating at 2,800–3,500 rpm and 175 °C–185 °C. The as-received SIS 1100 pellets are metered into the preheated straight-run binder over 30–45 min; after high-shear dispersion, the blend is transferred to a low-shear digestion tank for 2–4 h. A crosslinker-free formulation is preferred because sulfur-based crosslinking at this temperature can produce uncontrolled gelation across the unsaturated isoprene block. Storage stability is evaluated by ASTM D7173-20 after 48 h at 163 °C; for SIS 1100, a softening point difference of less than 1.5 °C between the top and bottom sections is frequently specified, which is tighter than the usual 2.5 °C limit for SBS-modified binders. MSCR recovery after rolling thin film oven aging is determined by AASHTO T 350 at 3.2 kPa and 64 °C; recovery values require confirmation against the supplier certificate of analysis because aromatic content of the base binder changes the phase morphology of the isoprene domain. Low-temperature grade is confirmed by AASHTO T 313, where excessive aromatic oil above 4 wt% can shift the m-value failure to warmer temperatures. The end products are stress-absorbing membrane interlayers, bridge deck waterproofing membranes, and polymer-modified wearing courses for intersections, port pavements, and bus lanes.
For cast film and elastic diaper ear laminates, SIS 1100 is processed on a single-screw extruder with 30:1 L/D, barrier screw geometry, and a 300 mm flex lip die with a 0.6 mm die gap. Melt temperature at the die is held between 185 °C and 195 °C, and the chrome-plated chill roll is maintained at 15 °C–20 °C. The melt draw ratio is limited to 6:1–8:1; above 8:1, draw resonance appears as cyclic gauge bands within 12–18 m/min line speeds. Gauge uniformity is measured by ASTM D6287; film tensile properties are tested under ISO 527-3:2018, with machine-direction elongation above 700% retained only when the chill roll temperature stays below 25 °C and post-extrusion residence time is minimal. Pre-compounding with 10–20 wt% polypropylene or a higher-styrene block copolymer reduces blocking but permanently increases set by 15–20 percentage points. Medical-grade elastic films for skin fixation and over-plaster applications require additional biocompatibility testing under ISO 10993-5 and ISO 10993-10; food-contact mechanical compliance alone does not satisfy skin-contact regulatory requirements.
In injection moulded footwear soling compounds, SIS 1100 is dry-blended with ethylene-vinyl acetate copolymer, filler, azodicarbonamide blowing agent, and dicumyl peroxide in a low-speed ribbon blender until batch homogeneity approaches ±2 wt%. The blend is foamed in a temperature-controlled hydraulic press at 160 °C–170 °C and 8–12 min; the main process conflict is that azodicarbonamide decomposition is exothermic and can carry the core above 175 °C, accelerating isoprene block chain scission before the EVA network reaches complete crosslinking. Hardness, rebound, and abrasion are measured by ISO 868, ISO 8307, and ISO 4649:2021. Soles with SIS 1100 addition of 10–15 phr show improved flex fatigue resistance under ISO 17707:2017, with crack initiation observed after 30,000 cycles at 0 °C without rapid propagation; above 20 phr, compression set increases and cell structure becomes coarser, causing density variation across the sole. Zinc stearate should not exceed 0.5 phr when SIS 1100 is compounded with high-acid EVA grades because the acidic residues can produce open-cell morphology and demoulding tears. Finished soles for EU distribution are screened against REACH (EC) No 1907/2006 Annex XVII PAH entries; SIS 1100 itself is not a PAH source, but extender oil quality must be verified by the supplier.
Toys and soft-touch gel articles based on SIS 1100 are compounded with white mineral oil at loadings of 300–600 phr, producing clear gels with Shore OO hardness values below 35. Mixing is conducted in a vacuum planetary mixer at 120 °C–140 °C to remove air bubbles; the melt is cast into moulds and annealed for 4–6 h to stabilise syneresis. Oil migration is assessed gravimetrically under accelerated aging at 70 °C for 72 h. Toy-grade formulations must comply with EN 71-3:2019+A1:2021 migration limits, ASTM F963-23, and the phthalate restrictions in REACH (EC) No 1907/2006 Annex XVII; US food-contact conformance is not automatically obtained by relying on FDA 21 CFR 177.2600 when the article is not rubber intended for repeated use. Published peer-reviewed data for this specific grade in high-oil toy gels is limited, so commercial batches require lot-specific certificate of analysis review and bench-scale migration testing before scaling.
Construction sealants formulated with SIS 1100 are produced at 12–18 phr polymer, 20–30 phr butyl rubber, 10–15 phr polybutene, and 35–45 phr fine calcium carbonate. Mixing is performed in a planetary mixer under a vacuum of 0.85–0.95 bar to minimise moisture absorption; the paste is extruded into aluminium or plastic cartridges and tested for movement capability under ISO 11600:2022 class 25. Tensile adhesion at 23 °C and -20 °C is measured by ISO 8339, and dynamic fatigue is assessed by ASTM C719-14. The limiting property is plasticizer migration into porous substrates, which accelerates above 40 °C and causes adhesion loss after 500–700 h of QUV exposure; butyl rubber content above 30 phr reduces this migration but raises low-temperature stiffness. The end uses are perimeter joint fillers, window frame sealants, and expansion joints in precast concrete panels.
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Jusage SIS 1100 is a linear styrene-isoprene-styrene block copolymer supplied as a low-odor porous pellet. The polymer is specified for hot-melt pressure-sensitive adhesive compounding where the polystyrene end-blocks provide reversible physical crosslinks, while the polyisoprene mid-block contributes rapid wetting and conformability at low coating weights. Published grade-specific data for Jusage SIS 1100 is limited to manufacturer certificate-of-analysis fields; the specification ranges in Table 1 are representative of the SIS 1100 product class and must be checked against each incoming lot.
Incoming quality control for hot-melt coaters typically screens melt flow rate at 200°C/5 kg by ASTM D1238 and solution viscosity at 25% solids in toluene by ASTM D2196. A lot is held if the melt flow rate deviates by more than ±1.5 g/10 min from the target value. Fourier-transform infrared spectroscopy can confirm the absence of butadiene contamination: the trans-1,4-butadiene absorption at 965 cm⁻¹ should remain below 0.2% of the polystyrene reference peak height. If that band exceeds the threshold, the lot may contain SBS or butadiene-rich block copolymer and should be segregated.
| Property | Test method | Typical value or range |
|---|---|---|
| Melt flow rate, 200°C/5 kg | ASTM D1238 | 9–14 g/10 min |
| Styrene end-block content | Internal MIR | 14–16 wt% |
| Diblock content | SEC-UV | 15–20% |
| Tensile strength at break, Type IV | ASTM D638 | 2.0–3.5 MPa |
| Elongation at break | ASTM D638 | 800–1000% |
| Hardness, Shore A, 10 s | ASTM D2240 | 36–42 |
| Specific gravity | ISO 2781 | 0.92–0.94 |
| Solution viscosity, 25% in toluene at 25°C | ASTM D2196 | 1200–2000 mPa·s |
Because the isoprene mid-block contains tertiary allylic carbon positions, oxygen attack at 150°C and above can generate hydroperoxides that accelerate chain scission and gel formation. In a jacketed sigma-blade mixer with a fill factor of 0.65–0.75, a melt temperature of 150°C typically allows a stable Brookfield viscosity plateau within 20–30 min. At 170°C, residence beyond 60 min shifts melt flow rate by more than 10% from the initial value and may raise the yellowness index by 2–5 units per ASTM D6290. A hindered phenolic primary antioxidant at 0.2–0.4 wt% and a phosphite secondary stabilizer at 0.1–0.2 wt% are therefore used in compounding. Process operators also limit headspace oxygen by purging the mixer with nitrogen at 0.5–1.0 L/min; without purging, the same batch at 150°C can develop fish-eye gel particles after 45 min of mixing.
In continuous twin-screw extrusion with L/D 32:1, barrel setpoints should not exceed 160°C in the final two zones. A temperature profile of 110°C, 130°C, 145°C, 150°C, 145°C from feed to die produces a melt temperature of approximately 155°C at 400 kg/h. Specific mechanical energy input above 0.15 kWh/kg can increase melt temperature by 8–12°C, so screw speed is maintained below 350 rpm when the extruder diameter is 53 mm.
Capillary rheometry at 150°C shows a shear-thinning index of 0.35–0.45 between 100 s⁻¹ and 1000 s⁻¹; a tenfold increase in shear rate lowers apparent viscosity by 60–70%. The non-Newtonian response is important for nozzle flow but less relevant for sigma-blade mixing because shear rates there remain below 50 s⁻¹.
Substitution of a styrenated C5 tackifier at 40–60 phr per 100 phr of Jusage SIS 1100 shifts shear adhesion failure temperature from approximately 55°C to 70°C when measured under ASTM D4498; loop tack measured under ASTM D6195 decreases from 8.5 N/25 mm to 6.0 N/25 mm. If the tackifier is replaced with a hydrogenated hydrocarbon resin at equivalent loading, 180° peel adhesion on stainless steel under ASTM D3330 falls below 4 N/25 mm, indicating poorer specific adhesion at higher hardness. Wax addition above 2 phr reduces blocking but can reduce loop tack by 15–20%; in low-temperature label applications, wax is usually omitted.
The same formulation changes alter dynamic mechanical response. At 1 Hz and 1% strain, the tan delta peak for a 50 phr tackifier blend is near 20°C; at 60 phr it rises to 30°C, narrowing the temperature window for quick stick below 10°C. Published data for the exact Jusage SIS 1100 in this ternary tackifier system is limited; the ranges above are class-level values based on SIS polymers with equivalent styrene content and melt flow rate.
Low-temperature label lines running an EVA 28/400 formulation require melt tanks at 170–180°C and heated transfer hoses; Jusage SIS 1100 runs in the same equipment at setpoints of 140–150°C. The lower melt temperature reduces thermal degradation but shortens open time on the substrate. At a slot-die coat weight of 20 g/m², the SIS 1100 adhesive retains wet-out on paper label stock at 5°C; the EVA 28/400 comparison typically shows fiber-tearing adhesion only above 10°C at the same coating weight. Peel adhesion at 180° on stainless steel under ASTM D3330 is 6–9 N/25 mm for the SIS 1100 system, compared with 3–5 N/25 mm for the EVA system. Melt flow rate of SIS 1100 at 200°C/5 kg is higher than SBS 1301 by a factor of 3–5, which reduces pump pressure in slot-die coating by 20–30% at equivalent throughput.
| Variable | Jusage SIS 1100 | SBS 1301 typical | EVA 28/400 typical |
|---|---|---|---|
| Melt temperature at 2,000 mPa·s | 150°C | 165°C | 175°C |
| Styrene content | 14–16 wt% | 29–31 wt% | not applicable |
| Mid-block Tg by DSC | −58°C | −80°C | −25°C |
| 180° peel, stainless steel, ASTM D3330 | 6–9 N/25 mm | 4–6 N/25 mm | 3–5 N/25 mm |
| Loop tack, ASTM D6195 | 7–9 N/25 mm | 5–7 N/25 mm | 2–4 N/25 mm |
| Shear adhesion failure temperature, ASTM D4498 | 60–70°C | 75–85°C | 60–65°C |
The principal replacement boundary is shear resistance at elevated temperatures: SBS 1301 maintains a higher shear adhesion failure temperature of 75–85°C under ASTM D4498, while SIS 1100 is limited to 60–70°C. SIS 1100 is therefore not recommended for hot-fill label applications or for cases requiring sustained shear resistance above 50°C. Direct comparative data for this specific formulation is limited, so the substitution threshold should be confirmed on production-scale coating equipment with the final tackifier package.
In multi-line disposable hygiene construction, Jusage SIS 1100 is metered through a continuous loss-in-weight gravimetric feeder into a twin-screw extruder with screw diameter 53 mm and L/D 32:1. Barrel temperature setpoints are 110°C, 130°C, 145°C, 150°C, 145°C; die pressure remains below 35 bar at 400 kg/h. The melt is applied through a Nordson contact slot die at 1.5–3.0 g/m² to nonwoven backsheets. Coating-weight variation measured by beta gauge is held within ±5% when melt flow rate is controlled to ±1.0 g/10 min. Batch-to-batch viscosity variation in SIS 1100 has a larger effect on coat-weight uniformity than tackifier lot variation; therefore incoming melt flow rate is screened before release to the coating line.
For low-application-temperature assembly adhesives, 0.3–0.6 mm spiral spray patterns at 140–150°C are used. Compressed air pressure of 1.0–1.5 bar and a nozzle-to-substrate distance of 10–15 mm produce fiber diameters between 80 and 150 µm. Sudden nozzle clogging occurs if gel particles exceed 200 µm, which is controlled by passing the melt through a 100 µm screen pack before the die.
At peel rates below 50 mm/min, the adhesive response of Jusage SIS 1100 is dominated by polyisoprene chain mobility and the tackifier resin glass transition. Raising tackifier loading from 40 phr to 60 phr shifts the tan delta peak temperature from 10°C to 30°C under dynamic mechanical analysis at 1 Hz and 1% strain. The same change increases the storage modulus at 25°C by 40–60%, but it decreases the high-rate peel work because the adhesive cannot dissipate energy through viscous flow. At 300 mm/min, failure moves from interfacial to cohesive when the styrene end-block content is below 15 wt%. In contrast, SBS 1301 with a styrene content of 30 wt% retains a higher cohesive plateau under the same peel rate; the butadiene mid-block can undergo strain-induced crystallization during extension, whereas polyisoprene does not. The measurable result is a 15–25% lower storage modulus at 25°C for SIS 1100 compared with SBS 1301 at the same styrene content, as determined by dynamic mechanical analysis at 10 rad/s and 1% strain.
Formula adjustments that increase cohesive strength, such as adding 10–20 phr of an end-block reinforcing resin or increasing styrene content, also raise melt viscosity. A 10°C increase in application temperature lowers viscosity by 20–30%, but above 170°C the polyisoprene block begins oxidative scission faster than the viscosity-reduction benefit. The practical operating window is therefore 140–160°C for slot-die coating and 150–170°C for spiral spray.
Jusage SIS 1100 is supplied with a shelf-life recommendation of 24 months from production when stored below 30°C and at relative humidity below 60%. Because the unsaturated isoprene mid-block is ozone-sensitive, original sealed UV-opaque bags should remain intact until use. Under REACH Regulation 1907/2006/EC, the product is classified as non-hazardous; processing fumes generated above 180°C require local exhaust ventilation and thermal oxidizer control. For food contact applications, the adhesive formulator may rely on FDA 21 CFR 175.105 for pressure-sensitive adhesives used in food packaging, provided the finished adhesive is separated from food by a functional barrier or used in compliance with the conditions of that section. EU food contact evaluation should follow Regulation 10/2011/EU when the adhesive is formulated into a multi-layer structure, with migration testing under OM2 conditions for non-fatty foods at 40°C for 10 days if direct contact is not excluded. RoHS Directive 2011/65/EU compliance for heavy metals is satisfied for general adhesive applications because lead, cadmium, mercury, and hexavalent chromium are not intentionally added; certificate-of-analysis verification is still required when final articles are exported.
Operational boundaries include the incompatibility of SIS 1100 with amine-based curing agents and with metal carboxylates at elevated temperature; these can accelerate gel formation and shift melt flow rate outside control limits. Pre-drying is not required when storage humidity is below 60%; at higher relative humidity, moisture absorbed on pellets can be removed by 2 h drying at 40°C in a desiccant dryer with a −40°C dew point. Do not exceed 40°C during drying because pellet blocking can occur in the dryer cone.
