| HS Code | 660267 |
| Chemical Family | styrene/alpha-methylstyrene hydrocarbon resin |
| Softening Point Ring And Ball | 120 °C |
| Glass Transition Temperature Dsc | 65 °C |
| Acid Number | <0.1 mg KOH/g |
| Melt Viscosity At 190c | 200 mPa·s |
| Flash Point Coc | 240 °C |
As an accredited High-Cohesion Piccotex 120 Hydrocarbon Resin for Hot-Melt Adhesives factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | High-Cohesion Piccotex 120 hydrocarbon resin supplied in 25 kg multi-wall paper bags for hot-melt adhesive formulations. |
| Container Loading (20′ FCL) | 20′ FCL: palletized bags of Piccotex 120 hydrocarbon resin, securely loaded and braced for safe multimodal transport. |
| Shipping | High-Cohesion Piccotex 120 Hydrocarbon Resin ships as solid pellets in sealed, moisture-resistant bags or drums. Keep cool, dry, and away from heat or direct sunlight. Secure pallets to prevent shifting during transit. Non-hazardous per shipping regulations, but handle with gloves and ensure ventilation. Avoid extreme temperatures to preserve adhesive performance. |
| Storage | Store High-Cohesion Piccotex 120 Hydrocarbon Resin in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep containers tightly closed to prevent moisture absorption and contamination. Avoid contact with strong oxidizers. Maintain temperatures below 40°C (104°F) and protect from prolonged exposure to high heat. Use appropriate handling and storage practices to preserve product quality. |
| Shelf Life | Shelf life is typically two years when stored in original, unopened packaging in a cool, dry place. |
Hot-melt units servicing high-speed case erectors melt Piccotex 120–modified EVA adhesives in 60–100 kg reservoirs where sump temperatures are held at 160–170°C and heated hoses are run at 1.5–3.0 MPa delivery pressure. Formulation addition of Piccotex 120 between 25 wt% and 40 wt% raises ring-and-ball softening point toward 120°C per ASTM E28 while Brookfield viscosity at 180°C measured per ASTM D3236 remains below 2,500 mPa·s for adequate nozzle shear. Industry compliance for food-corrugated packaging rests on FDA 21 CFR 175.105 for adhesive components and EU Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm², supplemented by REACH Regulation (EC) No 1907/2006 Article 33 SVHC declarations. The downstream production sequence includes board scoring, folding, bead application through slot nozzles with 0.8–2.5 mm orifice diameter, compression belt contact for 0.5–2.0 s, and palletizing within 8 h of bonding. Terminal product types include RSC corrugated cases, folding carton side seams, tray erectors, and multi-wall paper sack bottom seals. Operational boundaries concentrate on char growth in sump zones above 180°C and nozzle starve when viscosity exceeds 2,500 mPa·s; formulations with more than 40 wt% Piccotex 120 typically exhibit stringing at high-speed bead cut-off and are restricted to low-speed case lines.
| Piccotex 120 Content | Brookfield Viscosity at 180°C per ASTM D3236 | Softening Point per ASTM E28 | Line Observation |
|---|---|---|---|
| 20 wt% | 700–1,000 mPa·s | 95–105°C | Increased penetration into corrugated medium; lower fibre tear at frozen storage |
| 30 wt% | 1,000–1,600 mPa·s | 105–120°C | Balanced pump flow, compression window, and fibre tear |
| 40 wt% | 1,600–2,500 mPa·s | 120–135°C | Cohesion increases; stringing risk rises above 170°C reservoir setpoint |
In perfect-bound book production, the spine adhesive film between folded signatures and cover stock must balance penetration into uncoated offset paper and cohesion on coated cover board. Piccotex 120 is added at 15–30 wt% to EVA-based spine and side glues to raise the ring-and-ball softening point close to 120°C so that stacked books stored at 35–40°C resist creep under pallet load. The production line gathers signatures, mills the spine fold at rotary trimmers, applies a primer if the paper is coated, then extrudes the spine adhesive at 150–170°C through a heated nozzle slot with 0.3–0.8 mm gap before cover nipping at 0.2–0.5 MPa. Compliance obligations in this segment are product-specific: children’s board books require EN 71-3 migration testing when the adhesive is accessible, while general trade books require REACH Annex XVII restrictions documentation and 2009/48/EC Toy Safety Directive alignment when the finished book is marketed to children. Terminal products include paperback trade books, annual reports, notepads, catalogs, and telephone directories. Process limitation: open time in cold binderies below 18°C can drop under 3 s, producing weak cover hinge bonds if the Piccotex 120 content is above 30 wt% without plasticizer or wax adjustment.
Because nonwoven construction lines expose the adhesive to high surface-area circulation at 145–160°C, Piccotex 120 is introduced into styrenic block copolymer construction adhesives at 20–35 wt% to reduce cold flow and provide high cohesion after compression bonding. Viscosity at 150°C per ASTM D3236 is maintained between 1,200 and 2,000 mPa·s for consistent transfer from gear pumps to multi-nozzle heads. Compliance for hygiene articles relies on REACH SVHC absence, ISO 10993-5 and ISO 10993-10 for skin contact validation when required, and EDANA NWSP 010.1-19 guidelines for nonwoven laminate construction, while EU (EC) No 1223/2009 remains outside direct cosmetic adhesive scope but is often referenced in brand specifications. The production process applies construction adhesive by spiral spray, bead, or slot coat onto polyethylene backsheet or nonwoven carrier at line speeds between 400 m/min and 600 m/min, followed immediately by elastomeric strand laydown and embossing roll nip at 0.4–0.8 MPa. Terminal products include baby diapers, adult incontinence briefs, feminine hygiene pads, and disposable underpads. Operational boundaries: substrates with surface moisture above 6% require pre-drying, and chamber temperatures above 165°C accelerate thermal oxidation of stabilizer packages, causing char sloughing that blocks fibreized nozzles.
Running slot dies below 25 g/m² coat weights, hot-melt pressure-sensitive label coaters use Piccotex 120 at 15–25 wt% in SIS/SBS-based block copolymer formulations to raise shear holding power without sacrificing the low-temperature wet-out needed for silicone release liner transfer. The adhesive is melted at 160–180°C and coated through a closed slot die onto a siliconized release liner, transferred to face stock at cooling cylinders held to 10–15°C, and die-cut after lamination; coat weight variation across the web is held within ±1.5 g/m² to avoid edge bleed. Compliance is governed by FDA 21 CFR 175.125 for pressure-sensitive adhesives in food-contact labelling and EU Regulation (EU) No 10/2011 where labels contact packaged food surfaces, with overall migration limits of 10 mg/dm². Terminal product types include price labels, logistics labels, industrial tapes, decals, and tamper-evident labels. A noted boundary is that Piccotex 120 contents above 25 wt% can raise loop tack values measured per ASTM D6195 only marginally while reducing cold flow enough to prevent adhesive transfer during unwind; below 15 wt% the cohesive strength becomes insufficient for high-speed die-cutting, producing stringing at cutting edges.
On furniture edge banding lines, the applied melt must transfer to both the board substrate and the decorative edge in a single nip pass before the adhesive solidifies. Piccotex 120 is formulated at 30–45 wt% with EVA and filler in edge banding hot melts to bring the softening point to 120–135°C and resist transient heat from edge trimming and fine sanding. Application equipment includes pre-melt tanks at 170–190°C, roller or slot coaters that deposit 120–180 g/m² onto PVC, ABS, or PP edge bands, and nip pressure rollers operating at 0.3–0.6 MPa. Compliance for woodworking adhesives commonly references EN 204 for non-structural wood adhesive durability classification, REACH Annex XVII, and indoor air quality specifications such as the German AgBB scheme when assembled furniture is tested. Terminal products include kitchen cabinets, office furniture edge banding, wardrobe shelves, and laminated panel components. Process limitations: particleboard moisture above 8% generates steam blisters at the bond line, and line speeds above 25 m/min with Piccotex 120 content beyond 45 wt% produce open joints because the melt viscosity exceeds acceptable transfer thresholds.
Interior laminates for automotive cabins require hot-melt films that remain dimensionally stable under dashboard surface temperatures that can reach 100–110°C in solar soak. Piccotex 120 is incorporated at 20–30 wt% into EVA or polyolefin hot-melt laminating adhesives to increase heat resistance and reduce fogging compared with lower-softening-point tackifiers. Coating is performed with roll coaters or slot dies at 160–180°C, followed by lamination of foam, fabric, or film substrates at nip pressures between 0.2 and 0.5 MPa. Compliance for interior adhesives is anchored to VDA 278 for VOC and FOG emissions, DIN 75201 Method B gravimetric fogging with a typical OEM alert limit below 2 mg per 10 cm², ISO 6452 for trim material fogging, and GADSL-screened raw material declarations under REACH Article 33. Published quantitative limits for Piccotex 120 in this specific configuration are limited; the cited 2 mg per 10 cm² threshold is an OEM alert level rather than a universal regulatory ceiling. Terminal products include headliners, door panel inserts, carpet fixation, interior mirror housing wraps, and instrument panel skin lamination. Operational boundaries include mandatory pre-drying of hygroscopic foam and nonwoven substrates when ambient RH exceeds 60% to prevent bubble defects at the bond line, and exclusion of amine-based catalysts that cause exothermic destabilization in the melt reservoir during shift hold periods above 2 h.
| Standard or Regulation | Scope | Relevance to Piccotex 120 Laminates |
|---|---|---|
| VDA 278 | Thermal desorption of VOC and FOG | Quantifies condensable emissions from interior assemblies |
| DIN 75201 Method B | Gravimetric fogging | Measures condensed volatile mass on cooled glass |
| ISO 6452 | Trim material fogging | Cross-checks fogging of coated laminate surfaces |
| REACH (EC) No 1907/2006 Article 33 | SVHC declaration | Substance communication in assembled articles |
| GADSL | Automotive substance restrictions | Screens raw material compliance before adhesive registration |
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Hot-melt adhesive production for case and carton sealing, bookbinding, profile wrapping, and non-pressure-sensitive product assembly uses tackifier selection to control cohesive failure, substrate wetting, and thermal resistance. High-Cohesion Piccotex 120 Hydrocarbon Resin for Hot-Melt Adhesives is a low molecular weight aromatic hydrocarbon tackifier supplied as solid flakes or pastilles. The 120 designation corresponds to the nominal ring-and-ball softening point of 120°C when tested according to ASTM E28. Gardner color is specified at ≤1 under ASTM D1544. Acid number is below 1 mg KOH/g under ASTM D465. The product is used in hot-melt formulation practice where cohesive failure, not initial tack, limits adhesive performance.
Neat resin density is approximately 1.08 g/cm³ under ASTM D792, and Cleveland open cup flash point is above 200°C under ASTM D92. These values are typical neat resin parameters, not batch limits. Lot-specific certificates of analysis govern incoming inspection. The aromatic structure increases resistance to flow at elevated service temperatures but also increases melt viscosity relative to aliphatic C5 resins with equivalent softening point. At relative humidity below 60%, the flake surface remains free-flowing; cyclic condensation can generate surface moisture and steam voids during extrusion. Pre-drying at 40–50°C for 2–4 h is recommended before continuous compounding if storage exceeds 6 months or visible surface moisture is present. In production hoppers, batch-to-batch flake size variation can affect gravimetric feeder stability; lobe-screw feeders or screens of 2–4 mm reduce bridging.
Aliphatic C5 resins reduce plateau modulus and promote cold adhesion but contribute less to upper service temperature. Hydrogenated C9 resins offer improved color and ultraviolet stability; however, hydrogenation reduces the polar aromatic functionality available for adhesion to printed paperboard, aluminum foil, and polar polymer surfaces. Piccotex 120 contains a high aromatic content and is therefore associated with increased cohesive energy and higher shear adhesion failure temperature. In a closely controlled EVA packaging adhesive comparison, replacement of a nominal 100°C softening point C5 resin with Piccotex 120 at equal loading raised SAFT by 6–12°C under a 500 g dead-load ramp of 2°C/min in a circulating air oven. The same substitution increased application viscosity and reduced cold-flex performance; wax and plasticizer adjustments are required to reclaim low-temperature flexibility. Published formulation-specific data for this exact comparison is limited, so ASTM D4498 and ASTM D6195 should be used as validation methods.
The solubility parameter of Piccotex 120 is closer to aromatic styrenic block domains than to aliphatic rubber midblock segments. In SIS-based systems, selective association with the styrene end-block phase is detectable by dynamic mechanical analysis as a shift in the end-block glass transition. This association increases stiffness and heat resistance but can reduce low-temperature tack. In EVA systems, the resin is most compatible with vinyl acetate contents between 18% and 33%. In polyethylene-rich polyolefin formulations, compatibility is more limited and should be screened by hot-stage microscopy before scale-up.
| Property or Performance Attribute | Piccotex 120 | Aliphatic C5 resin | Hydrogenated C9 resin | Rosin ester resin |
|---|---|---|---|---|
| Nominal softening point (ASTM E28) | 120°C | 90–110°C | 90–120°C | 80–110°C |
| Gardner color (ASTM D1544) | ≤1 | ≤1 | ≤1 | 3–6 |
| Acid number | <1 mg KOH/g | <1 mg KOH/g | <1 mg KOH/g | 5–15 mg KOH/g |
| Polar/aromatic character | High aromatic | Low aliphatic | Intermediate alicyclic/aromatic | High ester and acid |
| Contribution to hot shear cohesion | High | Moderate | Moderate-high | Moderate |
| Low-temperature tack contribution | Lower | High | Moderate | High |
In SIS-based assembly and pressure-sensitive adhesives, Piccotex 120 associates with the styrene end-block domains and raises the glass transition temperature of those domains. This reduces loop tack at 23°C compared with a partially hydrogenated C9 tackifier at equal loading. The shift in failure mode from cohesive to adhesive can occur on low-energy substrates such as untreated polypropylene with surface energy below 36 mN/m; corona treatment or flame treatment is required for acceptable bond formation. The observed loss of tack is formulation-specific and should be measured by ASTM D6195 rather than inferred from softening point alone.
On a corotating twin-screw extruder with L/D 40:1, Piccotex 120 is preferably side-fed after the polymer melting section. Premature addition into the main feed throat can produce localized melt blockage, elevated motor amperage, and feed surge. Feed-zone temperatures are set between 120–140°C, mid-barrel zones at 150–170°C, and the die at 170–180°C. Melt temperature should not exceed 200°C because aromatic hydrocarbon tackifiers undergo thermo-oxidative chain scission and color-body formation. A vacuum vent at -0.08 MPa or a nitrogen sweep in the vent zone removes volatile residuals and reduces gel formation. Filtration through 100–250 µm screen packs before the gear pump reduces char and undispersed resin particles.
In batch sigma-blade mixers with working volume 200–500 L, polymer and wax are melted first at 150°C; Piccotex 120 is then added gradually under high shear to prevent resin lumps. Mixing continues for 30–60 min after resin addition. Total melt residence time at 180°C should not exceed 4 h because viscosity drift and color development can occur. Heated storage tanks at 160–170°C feed slot-die coating stations. Coating lines operating at 170–180°C with 0.2–0.5 mm die gaps typically apply 15–40 g/m² for carton sealing adhesive; coat weight is determined by pump speed, line speed, and substrate heat capacity rather than by the resin grade alone.
Melt viscosity after resin addition is quality-controlled by ASTM D3236 using a Brookfield Thermosel at 180°C. In EVA packaging adhesives, addition of Piccotex 120 at 35 wt% generally increases Brookfield viscosity compared with an equal loading of low-softening-point C5 resin. The increase can be managed by reducing high-melt-viscosity wax or selecting a lower molecular weight EVA grade. Open time is influenced by aromatic content but remains more sensitive to wax choice and application temperature. Equipment cleaning after Piccotex 120 processing may require purging with a lower-viscosity polyolefin. Residual aromatic resin that remains in static heated zones can carbonize and create black specks. Thermal cleaning at 180–190°C under nitrogen, followed by mechanical cleaning of die lips, reduces contamination transfer to subsequent light-colored products.
Rosin ester tackifiers reduce melt viscosity and increase initial tack, but their ester functionality and residual acid number can interact with amine-based stabilizers and can hydrolyze in humid service. Replacement of a rosin ester with Piccotex 120 in an SIS assembly adhesive at 30–40 wt% lowers acid number and increases cohesive strength. However, loop tack may decrease by an indicative 10–25% under ASTM D6195 at 23°C. The decrease is generally larger on untreated low-surface-energy substrates and at high coating speeds. In EVA-based packaging adhesives, Piccotex 120 raises dynamic storage modulus in the rubbery plateau. Dynamic mechanical analysis at 1 Hz shows a shift in the tan δ peak associated with the aromatic resin phase; exact shifts depend on vinyl acetate content and resin loading.
Formulations with paraffin wax above 10 wt% may show limited compatibility between Piccotex 120 and the wax phase. Hot-stage microscopy at 150°C or small-angle rheology can detect phase separation before production. Published data for this specific configuration is limited; line trials with 250 kg batch sizes are often used for feed behavior and color-stability verification before full production approval. Prolonged ultraviolet exposure in clear films causes yellowing of the aromatic resin; a hindered amine light stabilizer or UV absorber package is required for exterior clear hot-melt films. The resin is therefore better suited to pigmented or interior packaging adhesives unless light stability is validated by accelerated weathering under ISO 4892-3.
Typical neat resin parameters used for incoming inspection are listed in Table 2.
| Parameter | Test method | Typical value |
|---|---|---|
| Ring-and-ball softening point | ASTM E28 | 120°C |
| Gardner color | ASTM D1544 | ≤1 |
| Acid number | ASTM D465 | <1 mg KOH/g |
| Density at 25°C | ASTM D792 | 1.08 g/cm³ |
| Cleveland open cup flash point | ASTM D92 | >200°C |
| Physical form | Visual inspection | Solid flakes or pastilles |
For indirect food-contact adhesive applications, the final formulation should be evaluated under FDA 21 CFR 175.105. The resin supplier’s compliance statement must be reviewed for lot-specific migration limits and end-use restrictions. Under European Union chemical legislation, the substance is evaluated within the framework of REACH Regulation (EC) No 1907/2006; downstream users should confirm relevant exposure scenarios in the extended safety data sheet. Workplace volatile emissions during prolonged melt processing are monitored by thermal desorption sampling according to ISO 16000-6 or equivalent validated methods, with local occupational exposure limits for hydrocarbon vapors applied. The final adhesive formulation, including all additives, remains responsible for total regulatory compliance.
