| HS Code | 597827 |
| Product | NOVARES LA300 |
| Resin Type | Liquid hydrocarbon resin for flexible adhesives |
| Appearance | Clear viscous liquid |
| Solubility | Soluble in aromatic and aliphatic hydrocarbons |
| Compatibility | Compatible with EVA, SIS, SBS and natural rubber |
As an accredited NOVARES LA300 Liquid Hydrocarbon Resin for Flexible Adhesives factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 200 kg steel drums, with IBC totes and bulk options available for flexible adhesive applications. |
| Container Loading (20′ FCL) | 20′ FCL loaded with NOVARES LA300 in secure drums/IBCs, properly braced, ventilated, and labeled for safe transport. |
| Shipping | NOVARES LA300 ships in drums or bulk containers, requiring dry, ventilated conditions away from heat and ignition sources. Secure upright loads with proper bracing. Ensure compatibility with standard resin handling equipment. No special hazard classification is typically required; maintain spill containment and follow standard chemical transport protocols for safe delivery. |
| Storage | Store NOVARES LA300 in a cool, dry, well-ventilated area, away from direct sunlight, heat, and open flames. Keep containers tightly sealed to prevent contamination and moisture absorption. Recommended storage temperature is between 10°C and 30°C. Under these conditions, shelf life is typically 12 months from shipment. Avoid prolonged skin contact. |
| Shelf Life | Shelf life is typically 24 months from manufacture date when stored in original unopened containers under cool, dry conditions. |
On high-speed BOPP carton sealing tape lines operating at 300–500 m/min, the hot-melt pressure-sensitive adhesive layer is compounded from styrene-isoprene-styrene block copolymer, NOVARES LA300 liquid hydrocarbon resin, paraffinic process oil, and hindered phenolic antioxidant. The liquid resin is metered at 45–60 mass% of the total formulation to reduce melt viscosity and depress the isoprene block glass transition without inducing cold flow on the polypropylene carrier. Mixing is performed in a twin-screw extruder with L/D 48:1 at 150–170°C under nitrogen blanketing, followed by slot-die coating at 15–25 g/m² dry coat weight. Loop tack is measured according to ASTM D6195; 180° peel adhesion is determined on stainless steel according to ASTM D3330; static shear resistance is recorded under 1 kg load according to ASTM D3654. Adhesive transfer and clean peel on corrugated board at 5°C occur when the LA300 loading exceeds 65 mass%, which defines the upper formulation boundary. Compliance for incidental food contact is addressed under FDA 21 CFR 175.105 with additional migration testing on the finished tape. End products are carton sealing tapes for e-commerce case closing and industrial bundling.
High-speed nonwoven hygiene lines apply construction adhesive through multi-line slot nozzles at 150–170°C and line speeds above 400 m/min. NOVARES LA300 is combined with styrene-butadiene-styrene block copolymer at 25–30 mass%, paraffinic oil at 15–20 mass%, and antioxidant, while the liquid resin portion is held at 45–55 mass% to control elongational viscosity and prevent bead breakage on polyethylene backsheet. Melt viscosity is checked by ASTM D3236 with a Brookfield Thermosel spindle 27 at 150°C, with a production window below 3,000 mPa·s. Open time is 1–5 seconds; creep resistance is evaluated under 500 g static load at 40°C for 4 h on a stainless steel panel. Batch-to-batch viscosity drift above ±10% produces uneven elastic strand bonding and requires inline temperature adjustment. Compliance is maintained under REACH Regulation (EC) No 1907/2006 Annex XVII Entry 50 for polycyclic aromatic hydrocarbons, with a certified PAH level below the regulatory limit. End products are diaper leg cuffs, waistbands, and adult incontinence construction bonds.
Solvent-based moisture-cure polyurethane laminating adhesives for flexible packaging are diluted in ethyl acetate to 30–40% solids and coated by gravure cylinder at 2.5–4.0 g/m² dry weight. NOVARES LA300 is introduced at 10–20 phr on resin solids to extend pressure-sensitive open time on lines running at 150–250 m/min. The liquid resin is vacuum-dried to moisture content below 0.05% before addition because residual water reacts with aromatic isocyanate and raises adhesive viscosity within 30 minutes. Cure is monitored by ATR-FTIR disappearance of the NCO absorbance band at 2,270 cm⁻¹; residual isocyanate below 5% after 7 days at 25°C and 50% RH is required before slitting and lamination release. Addition above 20 phr reduces lap shear after 7 days and increases laminate haze; published data for this specific configuration is limited, so each film combination is qualified by pilot line runs. Compliance for dry food laminates is verified under FDA 21 CFR 175.105 and, where the adhesive is behind a functional barrier, migration is assessed by end-use testing under Regulation (EU) No 10/2011. End products are film-film laminates for stand-up pouches and flow-wrap packaging.
Automotive interior trim suppliers spray polychloroprene contact adhesives onto polyester textile and rigid ABS substrates after diluting with a toluene/methylcyclohexane blend. NOVARES LA300 is added at 20–40 phr on polychloroprene rubber, with magnesium oxide at 4 phr, zinc oxide at 5 phr, and alkyl phenol novolac resin at 10–15 phr. Flash-off time is 30–60 seconds at 50–60°C, followed by heat reactivation at 70–80°C under infrared panels. The liquid resin extends tack retention and improves wetting of low-energy grained ABS; peel strength after 72 h at 23°C is measured according to ISO 8510-2 at 100 mm/min, with cohesive failure of the textile core preferred over interfacial delamination. Fogging is characterized by VDA 278 thermal desorption analysis, with FOG condensate targets below 2 mg per sample to satisfy OEM interior air quality specifications. Compliance includes REACH Regulation (EC) No 1907/2006, RoHS Directive 2011/65/EU for electrical interior modules, and GADSL declarable substance reporting in the International Material Data System. End products are door trim inserts, seat back panels, and headliner edge wraps.
Removable carpet tile and luxury vinyl tile adhesives are prepared from solvent-based acrylic polymers and coated at 150–200 g/m² wet on nonwoven felt or glass-fiber scrim by knife-over-roll or reverse roll coaters. NOVARES LA300 is added at 10–20 phr to the acrylic binder to depress the composite glass transition temperature and improve initial grab without increasing residual tack after 30-day dwell on concrete. Peel adhesion to stainless steel is measured according to ASTM D3330 at 300 mm/min after 24 h contact; rolling ball tack is recorded per PSTC-6; shear adhesion failure temperature is determined by ASTM D4498 with a 1 kg ramp. Loadings above 20 phr produce adhesive transfer to concrete subfloors after accelerated aging at 60°C for 7 days, which is specified as the upper processing boundary. Indoor emissions are evaluated according to CDPH/EHLB Standard Method v1.2 and AgBB evaluation for VOC and SVOC after 28 days. End products are removable carpet tiles, entry matting, and luxury vinyl plank underlay.
Perfect-bound softcover book spines are bonded with hot-melt adhesives based on ethylene-vinyl acetate at 30–35 mass%, NOVARES LA300 at 35–45 mass%, paraffin wax at 5–10 mass%, and Fischer-Tropsch wax at 2–5 mass%. The compound is prepared in a jacketed melter with gear pump circulation at 150–170°C and applied by a two-wheel spine applicator. Open time is 2–8 seconds; cold crack resistance is checked by flexing bound books at 0°C and -10°C after conditioning, with substrate fiber tear preferred over adhesive fracture. Page-pull resistance is measured with a 500 N load cell at 100 mm/min crosshead speed, but the acceptance method is project-specific rather than an ISO standard. The liquid resin suppresses low-temperature stiffening in the EVA matrix; resin addition above 45 mass% lowers melt viscosity below the minimum wheel pick-up range and causes spine adhesive strike-through on uncoated paper. Compliance is maintained under REACH Regulation (EC) No 1907/2006 and low-PAH certification per Annex XVII Entry 50. End products are perfect-bound softcover books, catalogs, and annual reports.
| Application segment | Governing standard | Test method | Operational boundary |
|---|---|---|---|
| Carton sealing tape | FDA 21 CFR 175.105 | ASTM D6195, ASTM D3330, ASTM D3654 | Clean peel above 65 mass% LA300 |
| Nonwoven hygiene | REACH Annex XVII Entry 50 | ASTM D3236, creep 500 g/40°C/4 h | Melt viscosity below 3,000 mPa·s at 150°C |
| Moisture-cure PU lamination | FDA 21 CFR 175.105, Regulation (EU) No 10/2011 | ATR-FTIR NCO at 2,270 cm⁻¹ | Residual NCO below 5% after 7 days |
| Automotive interior contact adhesive | VDA 278, RoHS 2011/65/EU, GADSL | ISO 8510-2 at 100 mm/min | FOG condensate below 2 mg |
| Removable flooring adhesive | CDPH/EHLB v1.2, AgBB | ASTM D3330, PSTC-6, ASTM D4498 | Transfer above 20 phr after 60°C/7 days |
| Bookbinding hot melt | REACH Annex XVII Entry 50 | ASTM D3236, project-specific page pull | Resin above 45 mass% causes strike-through |
In footwear sole attachment, a two-sided spray application of polychloroprene contact adhesive is modified with 10–20 phr NOVARES LA300 to extend open time on dense rubber outsoles and polyurethane midsoles. The adhesive is applied at 0.5–1.0 MPa air pressure through 1.3–1.5 mm nozzle openings, air-dried for 10–20 minutes, and heat-reactivated at 60°C before pressing. Initial green strength is measured by lap shear according to ASTM D1002 within 5 minutes of bonding; full strength is recorded after 72 h. Compliance is reviewed against REACH Annex XVII and California Proposition 65 for solvent mixtures. End products are athletic shoe soles, casual footwear, and safety boot midsoles.
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Flexible adhesive formulation begins with the selection of a tackifying resin that can modify viscoelastic response without introducing crystalline domains or volatile solvent. NOVARES LA300 is a low-molecular-weight liquid hydrocarbon resin produced from aromatic feedstock streams; it is supplied as a dark, pourable liquid at ambient temperature and is used in hot-melt, solvent-borne, and low-VOC flexible adhesive systems. The resin is differentiated from solid C9 aromatic hydrocarbon resins by its ambient liquid state and from aliphatic C5 liquid resins by its higher aromatic carbon content, which shifts the solubility parameter toward polar substrates.
The batch-release profile typically includes viscosity, acid number, saponification number, density, flash point, and Gardner colour. Viscosity at 25 °C is determined by rotational viscometry under ISO 2555 and is reported by the manufacturer in the range 200 000–400 000 mPa·s; this range reflects the liquid resin’s pumpability and metering behaviour in continuous mixing equipment. Heating to 60–80 °C reduces viscosity sufficiently for drum unloaders and gear pumps. Acid number and saponification number are specified below 1.0 mg KOH/g using ISO 2114 and ISO 3681 respectively, indicating low residual acid and ester content. Density at 20 °C is reported as 1.07–1.09 g/cm³ using ISO 1183-1 or ASTM D4052; the value is higher than that of typical C5 aliphatic liquid resins and reflects the aromatic ring mass fraction. Flash point is reported above 200 °C by Cleveland open cup ISO 2592. Gardner colour is typically above 16 under ISO 4630-1, which places the product in dark-colour adhesive, sealant, and sound-deadening applications rather than water-white or optically clear products.
The viscosity-temperature relationship is a critical processing variable. Although vendor data commonly quote viscosity at 25 °C, production metering often occurs at 60–80 °C; the temperature coefficient of viscosity is steep enough that a 10 °C change can alter mass flow through a gear pump by more than 20 %. Loss-in-weight and mass-flow metering systems should therefore be tuned using actual liquid density at the metering temperature rather than the reference density at 20 °C. No single published data set for this configuration is available across all equipment types, so calibration runs are required.
For solvent-borne flexible adhesives, NOVARES LA300 is dissolved with the base elastomer in toluene, cyclohexane, methyl ethyl ketone, or mixed ester-aromatic solvents. Because the resin is liquid, it reduces solution viscosity while contributing tack rather than simply diluting the polymer. The polar aromatic structure supports adhesion to aluminium, epoxy-coated steel, and flexible polyvinyl chloride; however, the dark Gardner colour imposes an operational boundary in white or pastel adhesive films. Solvent retention after coating and drying should be checked by ISO 3251 or ASTM D5403 when the resin loading exceeds 10 wt% of total solids. At higher loadings the low-molecular-weight fraction can influence drying-rate-dependent residual volatiles, particularly in thick films or low-air-flow ovens.
In hot-melt pressure-sensitive adhesive lines, NOVARES LA300 is metered into the mixing zone of a twin-screw extruder or heated paddle mixer at addition levels typically between 5 phr and 30 phr, depending on the base polymer and the target loop tack. The liquid resin reduces melt viscosity in SIS and SBS block copolymer formulations, permitting lower processing temperatures and lower shear heating. Production-scale compounding has shown that downstream injection after the polymer melting section avoids screw torque peaks and reduces thermal history; when the resin is added in the feed throat with dry polymer, screw torque and melt temperature can rise, and batch-to-batch viscosity drift may occur unless barrel zone temperatures are adjusted. Typical production twin-screw extruders use L/D ratios from 40:1 to 52:1, and liquid injection is placed after the melt seal. In continuous coating of hot-melt PSAs, the resin contributes to substrate wetting on corona-treated polyethylene terephthalate. Wetting should be verified by dyne solutions or peel testing under ASTM D903, because the resin alone does not guarantee adhesion without adequate surface treatment.
When the resin is used in styrenic block copolymer systems, dynamic mechanical analysis in shear mode from -40 °C to 120 °C at 1 Hz under ISO 6721-1 can be used to track the shift in loss tangent and plateau modulus. In SIS-based PSAs, aromatic liquid resin tends to associate with the styrene end-blocks and reduce the storage modulus in the rubbery plateau, which often increases room-temperature tack but lowers elevated-temperature shear resistance. Published data for this specific configuration is limited; formulators typically run a design-of-experiments panel including loop tack ASTM D6195, 180° peel ASTM D903, and shear adhesion failure temperature ASTM D4498 to establish the practical addition window for a given polymer-oil-resin combination.
A direct mass-for-mass replacement of a solid C9 hydrocarbon resin with NOVARES LA300 shifts the adhesive balance toward tack, wetting, and lower viscosity. The solid C9 resin, with a softening point of 90–110 °C under ASTM E28, contributes cohesive strength and hardness; the liquid aromatic resin has no comparable softening point and therefore reduces shear adhesion failure temperature and can lower peel strength at elevated temperature unless the base polymer or oil content is adjusted. Replacement of a rosin ester with NOVARES LA300 reduces acid number from typical rosin ester values of 5–15 mg KOH/g to below 1.0 mg KOH/g, which lowers hydrolysis potential in high-humidity service. The absence of rosin acid groups can reduce specific adhesion to some polar surfaces, so adhesion to metal and flexible PVC should be re-verified under ASTM D903 or ISO 11339.
| Resin type | Thermal state / viscosity | Acid number | Polarity | UV stability | Principal function |
|---|---|---|---|---|---|
| NOVARES LA300 liquid aromatic hydrocarbon resin | liquid; 200 000–400 000 mPa·s at 25 °C | <1.0 mg KOH/g | high | limited | tack and wetting |
| Solid C9 aromatic hydrocarbon resin | solid; softening point 90–110 °C | <1.0 mg KOH/g | high | limited | cohesion and hardness |
| C5 aliphatic liquid resin | liquid; 10 000–50 000 mPa·s at 25 °C | <1.0 mg KOH/g | low | better | nonpolar tackifier |
| Rosin ester | solid; softening point 80–105 °C | 5–15 mg KOH/g | moderate to high | moderate | specific adhesion |
Differences between NOVARES LA300 and other products arise from molecular architecture as well as polarity. The resin’s liquid state corresponds to a lower number-average molecular weight and a broader oligomer distribution than solid C9 grades. This shifts the glass transition temperature and viscosity but also increases the effective free volume in the adhesive, which can improve pressure-sensitive tack at ambient temperature while reducing elevated-temperature holding power. Conversely, a solid C9 resin builds elastic modulus and can withstand higher shear loads in structural or semi-structural flexible bonding. Selection therefore depends on whether the adhesive specification prioritizes loop tack and wetting or cohesive strength and thermal resistance.
In ethylene-vinyl acetate-based flexible adhesives, NOVARES LA300 modifies low-temperature flexibility and open time. Addition levels above 20 phr can depress Vicat softening temperature and increase creep at 40 °C; such formulations should be checked by ASTM D1525 or ISO 306 for Vicat temperature and by ASTM D4498 for shear resistance. Because the aromatic resin has limited compatibility with highly linear polyolefins, blends based on metallocene polyethylene or amorphous poly-alpha-olefin require pilot-scale compatibility screening before production commitment.
Operational boundaries for NOVARES LA300 include prolonged exposure to temperatures above 180 °C, which can accelerate oxidative darkening and volatile formation in open mixing vessels. Closed-container storage under nitrogen is recommended when ambient relative humidity exceeds 60 % RH, not because of hydrolysis but to prevent moisture ingress that causes pump cavitation during metering. The product should not be used as a direct food-contact adhesive component unless a functional barrier or migration study under EU Regulation 10/2011 or FDA 21 CFR 175.105 is completed for the specific packaging construction. Regulatory compliance with EC 1907/2006 or regional VOC limits should be confirmed against the current safety data sheet, because aromatic hydrocarbon resins may contribute to total aromatic compound emissions in high-temperature application.
