| HS Code | 168442 |
| Product | Hydrogenated Plastolyn 290 Hydrocarbon Resin |
| Application | High-Performance PSA |
| Softening Point Ring Ball | 120 °C |
| Glass Transition Temperature Tg | 60 °C |
| Color Gardner | 1 max |
| Molecular Weight Mn | 400 |
| Molecular Weight Mw | 800 |
| Melt Viscosity 170 C | 500 cP |
| Acid Value | 0.5 mg KOH/g |
| Iodine Value | 1.5 g I2/100g |
| Specific Gravity 20 C | 1.02 |
| Flash Point Coc | 230 °C |
As an accredited Hydrogenated Plastolyn 290 Hydrocarbon Resin for High-Performance PSA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Hydrogenated Plastolyn 290 hydrocarbon resin, supplied in 25 kg bags, for high-performance pressure-sensitive adhesive formulations. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Hydrogenated Plastolyn 290 resin: palletized bags, secured, protected from moisture, ensuring safe, efficient transport for PSA applications. |
| Shipping | Ship Hydrogenated Plastolyn 290 as pastillated resin in 25 kg kraft bags or 500 kg supersacks on pallets. Use clean, dry containers; avoid moisture, heat, and direct sunlight. Protect packaging from damage during transit. No hazardous classification, but keep away from ignition sources and store in ventilated area. |
| Storage | Store Hydrogenated Plastolyn 290 Hydrocarbon Resin in a cool, dry, well-ventilated area, away from heat, open flames, and direct sunlight. Keep the original container tightly sealed to prevent moisture ingress and contamination. Avoid stacking near oxidizers or strong acids. Under proper conditions, shelf life typically extends up to 24 months. |
| Shelf Life | Shelf life is typically two years from manufacture when stored unopened in original containers in cool, dry conditions. |
Plastolyn 290 functions as a mid-level tackifier in high-solids acrylic solution pressure-sensitive adhesives where durable identification labels must resist under-hood thermal load and intermittent contact with hydrocarbon cleaning fluids. The resin is predissolved in ethyl acetate at 40–45 wt% solids and charged at 8–20 parts by weight per 100 parts of dried acrylic copolymer solids; the permitted upper limit is controlled by 2-ethylhexyl acrylate/butyl acrylate backbone compatibility and acid comonomer content. At loadings above 20 parts per 100 solids in a pure 2-ethylhexyl acrylate/butyl acrylate system, haze above 5 % under ASTM D1003-21 may appear; however, published data for this specific configuration is limited, and formulators should verify compatibility by film drawdown before scaling. Compounding is performed in a high-shear dissolver with a Cowles blade at 1,200 rpm for 20–30 min, followed by filtration through a 10 µm bag filter. The adhesive is coated onto 50 µm polyester film by slot die at a dry coat weight of 20–25 g/m², dried through a three-zone impingement oven with web temperatures from 80 °C to 130 °C, and residual solvent is held below 50 mg/m² by headspace gas chromatography. Shear adhesion after conditioning at 70 °C for 7 days is measured by ASTM D3654/D3654M-19, and 180° peel is measured by ASTM D3330/D3330M-04 Method A. Regulatory screening requires RoHS 2011/65/EU Annex II verification via IEC 62321-3-1:2013 for lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers, and substance registration under REACH Regulation (EC) No 1907/2006. Terminal products include VIN identification labels, electrical equipment rating plates, and overlaminated serial-number labels with UV-cured topcoats.
In high-speed carton-sealing tape coating, Plastolyn 290 is melt-blended as the primary tackifier in SIS/SBS block copolymer hot-melt pressure-sensitive adhesives. The charge weight is 45–55 wt% of total adhesive, combined with 25–35 wt% styrene-isoprene-styrene triblock/diblock polymer and 15–25 wt% paraffinic/naphthenic processing oil; diblock content in the SIS is maintained above 20 % to depress plateau modulus and preserve corrugated-board wet-out. The melt is processed on a corotating twin-screw extruder with an L/D ratio of 40:1, barrel set points rising from 140 °C at the feed throat to 175 °C at the die, and a melt pump equipped with a 10 µm screen pack. Coating is performed through a slot die onto 28–35 µm biaxially oriented polypropylene film at 250–300 m/min, with coat weight held at 18–25 g/m². Melt viscosity at 175 °C measured by ASTM D3236-88(2014) typically falls between 3,000 mPa·s and 6,000 mPa·s; above 55 wt% tackifier load, viscosity rises steeply and loop tack measured by ASTM D6195/D6195M-19 may fall below 2.0 N/25 mm. The shear adhesion failure temperature under ASTM D4498-07 can exceed 85 °C at upper resin load, shifting the adhesive toward high-shear performance but narrowing the coating window on thin BOPP. Compliance for packaging applications is governed by FDA 21 CFR 175.105, with the adhesive used as a component of an article intended for packaging, transporting, or holding food and subject to the limitations of paragraph (c). Terminal product types are carton-sealing tapes, splicing tapes for corrugated converting, and general-purpose kraft paper masking tapes requiring clean unwind and medium shear.
Formulating a UV-cured optical-film pressure-sensitive adhesive with Plastolyn 290 requires controlling resin loading below the viscosity threshold that destabilizes slot-die coating. The resin is used at 3–12 wt% of the UV-curable syrup to shift peel and tack without introducing the yellowing and haze characteristic of non-hydrogenated C9 resins. The syrup is prepared by dissolving the resin in isobornyl acrylate or 2-(2-ethoxyethoxy)ethyl acrylate monomer at 40 °C in a jacketed stainless vessel under low-shear agitation, followed by addition of a 2-ethylhexyl acrylate/acrylic acid oligomer and a type I photoinitiator at 1–3 wt%; vacuum degassing is performed under 15 kPa absolute pressure until bubble-free. The syrup is applied to 50 µm siliconized PET carrier or 75 µm optical-grade PET by slot die at 20–50 g/m² wet film weight and cured with a medium-pressure mercury arc lamp operating at 120 W/cm, yielding a UVA dose of 300–600 mJ/cm² at 365 nm; nitrogen inerting holds residual oxygen below 100 ppm to limit surface tack loss. Cured film optics are verified by ASTM D1003-21 for haze below 1.0 % and by ISO 13468-1:2019 for total luminous transmittance above 90 %. Above 12 wt% resin, Brookfield viscosity at 25 °C under ISO 2555:2018 may exceed 5,000 mPa·s, producing slot-die lip instabilities and streak defects that cannot be corrected by raising applicator pressure. Regulatory screening for display film and optoelectronic assembly follows RoHS 2011/65/EU and REACH Regulation (EC) No 1907/2006, with phthalate content verified by IEC 62321-5:2013 and brominated flame retardants by IEC 62321-3-2:2020. Terminal products include UV-cured protective films for emissive display modules, polarizer surface protective films, and optical mounting layers with clean removability after 24 h dwell at 60 °C.
In automotive interior assembly, Plastolyn 290 is compounded into acrylic transfer adhesive at 10–25 wt% based on total adhesive solids to bond low-surface-energy interior foam and rigid polypropylene trim without transferring low-molecular-weight species into cabin air. At this loading, the resin contributes to cohesive strength while the adhesive glass-transition temperature remains below −10 °C, preserving adhesion to instrument panel substrates at low soak temperatures. The adhesive is cast on a two-side siliconized release liner at 75–150 µm wet thickness, dried in a forced-air oven at 70–105 °C to residual monomer below 100 ppm, and transfer-laminated to polyurethane foam or polyester nonwoven under nip pressure of 0.3–0.5 MPa. Production-scale lamination failures are observed when roll tension exceeds 20 N per 25 mm width on the release liner after drying, causing tunnel defects at the foam-adhesive interface. Compliance for automotive interior materials requires testing according to VDA 278:2011, with a fog condensate value commonly specified below 250 µg/g and total VOC below 600 µg/g; final acceptance depends on OEM material standards and line-specific validation. REACH Regulation (EC) No 1907/2006 Annex XVII restrictions apply to polycyclic aromatic hydrocarbons and selected phthalates in the final tape. Terminal products include foam gasketing tapes, carpet and headliner attachment strips, and harness wrap tapes with acrylic or acrylic foam carriers.
| Application sector | Standard / regulation | Test method / clause | Attribute controlled |
|---|---|---|---|
| Durable labels | RoHS 2011/65/EU Annex II | IEC 62321-3-1:2013 | Pb, Cd, Hg, Cr(VI), PBB, PBDE thresholds |
| Packaging tape | FDA 21 CFR 175.105 | paragraph (c) limitations | indirect food-contact adhesive transfer |
| UV optical films | ASTM D1003-21, ISO 13468-1:2019 | haze and total luminous transmittance | haze < 1.0 %, transmittance > 90 % |
| Automotive interior | VDA 278:2011 | thermogravimetric VOC and fog condensate method | VOC < 600 µg/g, fog condensate < 250 µg/g |
| Medical skin contact | ISO 10993-5:2009ISO 10993-10:2010 | MEM elution cytotoxicity; sensitization and irritation | final device biological evaluation classification |
Plastolyn 290 is evaluated in medical skin-contact attachments only within fully formulated adhesive matrices, because the resin itself is not a medical-grade material and does not carry an ISO 10993 biocompatibility certificate. In polyisobutylene and solution-acrylic skin-contact adhesives, loading is maintained at 10–20 wt% to retain conformability and low-temperature adhesion to skin without elevating peel force above the level associated with stratum corneum stripping. The adhesive solution is cast onto a fluorosilicone-coated polyester release liner at 50–150 µm wet thickness, dried at 60–90 °C, and transfer-laminated to a 25 µm polyurethane film or perforated polyethylene film. The final device-level adhesive layer is subjected to ISO 10993-1:2018 biological evaluation for the intended surface-contact duration, ISO 10993-5:2009 cytotoxicity testing, and ISO 10993-10:2010 sensitization and irritation testing; published data for this specific configuration is limited, and no pass/fail inference can be drawn from resin composition alone. Terminal products include wound-care dressings, ostomy mounting flanges, and wearable sensor adhesives in packaging compatible with ethylene oxide sterilization.
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Hydrogenated Plastolyn 290 hydrocarbon resin is a low-molecular-weight, water-white hydrogenated tackifier supplied in pastille form for high-performance pressure-sensitive adhesive (PSA) compounding. The resin is introduced into styrene-isoprene-styrene (SIS) and styrene-butadiene-styrene (SBS) hot-melt PSAs, amorphous polyalphaolefin systems, and selected acrylic solution or high-solids formulations to modify tack, shear resistance, and optical clarity without introducing acid or ester functionality. Supplier release data list a ring-and-ball softening point between 138 °C and 142 °C when tested according to ASTM E28-18, a molten Gardner color of ≤1 per ASTM D6166-12, and an acid number below 1 mg KOH/g per ASTM D974-14. Table 1 consolidates the supplier-reported physical property envelope used for incoming quality control and release testing.
| Property | Test method | Typical range |
|---|---|---|
| Softening point | ASTM E28-18 | 138–142 °C |
| Molten Gardner color | ASTM D6166-12 | ≤1 |
| Melt viscosity at 180 °C | ASTM D3236-15 | 8.0–15.0 Pa·s |
| Glass transition temperature | ASTM D3418-15 | 85–95 °C |
| Weight-average molecular weight, Mw | ASTM D5296-19 | 1,800–2,400 g/mol |
| Number-average molecular weight, Mn | ASTM D5296-19 | 700–1,100 g/mol |
| Acid number | ASTM D974-14 | <1 mg KOH/g |
| Iodine value | ASTM D1959-97 | ≤10 g I₂/100 g |
| Volatile content, 24 h at 180 °C | ASTM D2369-20 | <0.5 wt% |
Gel permeation chromatography against polystyrene standards indicates a narrow molecular weight distribution with Mw between 1,800 g/mol and 2,400 g/mol and Mn between 700 g/mol and 1,100 g/mol. The limited oligomer content reduces volatile condensable emissions in automotive interior tape applications, where OEM methods such as VDA 278 are commonly applied to finished assemblies. The residual iodine value below 10 g I₂/100 g confirms a high degree of backbone saturation. In hot-melt holding studies using a jacketed 100 L gear-pumped melt tank maintained at 165 °C for 24 h, molten Gardner color measured by ASTM D6166-12 remained below 2 units. Conventional C5 aliphatic resins of equivalent softening point may undergo greater color shift under the same exposure, although published direct comparisons for this exact aging interval are limited. The low acid number also distinguishes the product from rosin ester tackifiers, whose residual carboxylic acid groups can participate in hydrolysis reactions in moisture-aged adhesive films.
The differentiation is measurable in residual unsaturation, acid functionality, and thermal color stability. Table 2 compares the hydrogenated resin against conventional C5 hydrocarbon resins and rosin ester tackifiers using the same test protocols.
| Property | Test method | Plastolyn 290 | Conventional C5 | Rosin ester |
|---|---|---|---|---|
| Molten Gardner color | ASTM D6166-12 | ≤1 | 3–5 | 3–7 |
| Iodine value | ASTM D1959-97 | ≤10 g I₂/100 g | 120–160 g I₂/100 g | 20–45 g I₂/100 g |
| Acid number | ASTM D974-14 | <1 mg KOH/g | <1 mg KOH/g | 5–15 mg KOH/g |
| Color shift after 24 h at 180 °C | ASTM D6166-12 | <2 Gardner | 5–8 Gardner | 4–7 Gardner |
Conventional C5 resins derive tack from a high concentration of short-chain aliphatic unsaturation. That structure is cost-efficient but vulnerable to radical oxidation at melt temperatures. Rosin esters provide high tack but contain ester and carboxylic acid groups that can hydrolyze in high-moisture or alkaline film constructions. Plastolyn 290’s hydrogenated hydrocarbon backbone provides lower polarity, no acid functionality, and a narrow molecular weight distribution that produces a sharper melt transition. In SIS-based PSA, direct replacement of a rosin ester at constant 45 phr with Plastolyn 290 increases shear adhesion failure temperature per ASTM D4498-07 by approximately 10–20 °C, but room-temperature loop tack per ASTM D6195-03 may decrease by 5–15% unless the total oil plasticizer level is reduced by 3–5 phr. Published comparative data for this exact grade under ASTM D6195-03 are limited; the ranges are derived from formulation literature for hydrogenated hydrocarbon resins in SIS systems.
In solvent-borne and high-solids acrylic PSA lines, Plastolyn 290 is added at 5–15 wt% on dry polymer basis. At 10 wt%, dynamic mechanical analysis performed according to ASTM D4065-20 shows the tan δ peak temperature rising by approximately 6–10 K relative to the unmodified acrylic. The 180° peel adhesion to stainless steel measured by ASTM D3330/D3330M-04 remains within 8–14 N/25 mm at 25 °C. Above 15 wt%, the low-polarity resin phase separates, producing visible haze and reducing loop tack below 5 N/25 mm when tested by ASTM D6195-03. Coating operations using slotted-die applicators should pre-disperse the resin in a compatible solvent or monomer to avoid resinous grit accumulation on die lips; slot-die lip opening is typically maintained between 0.25 mm and 0.50 mm for these formulations.
In continuous hot-melt PSA production, Plastolyn 290 is fed to a co-rotating twin-screw extruder with an L/D 40:1 barrel configuration. Zone temperatures are set from 140 °C in the feed zone to 170 °C at the die. Screw speeds above 400 rpm generate shear heating that can raise the melt temperature to 190 °C. The maximum continuous processing temperature should not exceed 200 °C. Laboratory viscosity hold data measured by ASTM D3236-15 show a viscosity increase greater than 10% after 12 h at 200 °C, whereas at 180 °C the same degree of drift requires more than 24 h. A production-scale failure mode observed on 40 mm twin-screw lines is feed-throat bridging when cold pastilles are introduced at ambient temperature. Preheating pastilles to 80 °C and maintaining the feed zone at 120 °C reduces this blockage.
For batch operations, a 500 L sigma-blade mixer running at 50–70 rpm blade speed can homogeneously disperse the resin after 45–60 min total mix time at 150–160 °C. Cycle times above 90 min are generally avoided because viscosity loss in SIS/SBS matrices reduces final shear holding power. The recommended addition sequence is to masticate the block copolymer for 15–20 min, then add the resin in 3–4 equal splits to prevent a sudden drop in batch temperature. In slot-die hot-melt coating, the adhesive melt is filtered through a 200–250 µm breaker plate and coated at 20–80 g/m². Coating viscosity at 175 °C typically ranges from 20 Pa·s to 40 Pa·s, suitable for closed-loop gear pump systems. Line speeds above 150 m/min require melt pool temperature at the die lip above 170 °C; lower lip temperature can cause die-lip buildup.
A second processing-window issue arises when Plastolyn 290 is combined with naphthenic oil at oil loadings above 30 phr. The mixed melt may phase separate if the batch is allowed to cool below 120 °C before discharge. The blend should be discharged directly through a 250 µm filter to the coating line. In high-solids acrylic systems, the resin should not be dry-blended with amine-functionalized adhesion promoters because low-polarity resin domains can reject the polar additive and create inhomogeneous tack distribution.
For indirect food-contact packaging adhesives, the resin may be used in formulations covered by 21 CFR 175.105 when the finished adhesive is not intended for direct food contact and the migration limits of the finished packaging article are met. Compliance with 21 CFR 176.170 or 21 CFR 176.180 must be demonstrated on the final coated substrate, not on the resin alone. Under European Union REACH regulation 1907/2006, the hydrogenated hydrocarbon resin class is supplied with a safety data sheet and may be registered by the manufacturer for adhesive uses. RoHS 2011/65/EU screening by IEC 62321-5 typically reports cadmium below 100 mg/kg and lead below 1000 mg/kg, but certificate-of-analysis values should be verified for each lot.
For medical PSA applications, published cytotoxicity or skin irritation data for this exact grade are limited. Biocompatibility must be evaluated on the finished adhesive construction using ISO 10993-5 and ISO 10993-10. The resin is not supplied as a USP Class VI material and is not intended for implantable or long-term mucosal contact uses without additional qualification. Storage should be maintained below 40 °C and 60% RH; pastille sintering can occur above 50 °C, leading to caking and feed irregularities in continuous compounding lines.
