| HS Code | 183594 |
| Resin Type | Aliphatic-Modified C9 Hydrocarbon Resin |
| Appearance | Pastilles |
| Softening Point | 120 °C (Ring & Ball) |
| Color | 2 Gardner |
| Acid Value | < 1 mg KOH/g |
| Saponification Value | < 1 mg KOH/g |
| Density | 1.08 g/cm³ at 20 °C |
| Melt Viscosity At 180 C | 800 mPa·s |
| Melt Viscosity At 200 C | 500 mPa·s |
| Glass Transition Temperature | 70 °C |
| Flash Point | 220 °C (COC) |
| Number Average Molecular Weight | 900 g/mol |
| Solubility Parameter | 8.4 (cal/cm³)^0.5 |
As an accredited NOVARES TK120 Aliphatic-Modified C9 Resin for High-Heat Sealants factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | NOVARES TK120 aliphatic-modified C9 resin for high-heat sealants, supplied in 25 kg bags as free-flowing pastilles. |
| Container Loading (20′ FCL) | 20′ FCL loading: NOVARES TK120 aliphatic-modified C9 resin packed in sealed bags on shrink-wrapped pallets, safely secured for transport. |
| Shipping | NOVARES TK120 is shipped as pastilles in sealed multi-wall bags or bulk containers to prevent moisture ingress. Store in a cool, dry area away from direct sunlight and ignition sources. Handle with care to avoid dust generation. Transport per standard non-hazardous resin regulations. |
| Storage | Store NOVARES TK120 in a cool, dry, well-ventilated area away from direct sunlight, ignition sources, and strong oxidizers. Keep containers tightly sealed when not in use to prevent contamination or moisture pickup. Avoid prolonged exposure to excessive heat. Follow all applicable safety and handling regulations. |
| Shelf Life | NOVARES TK120 has a typical shelf life of 24 months when stored in original, unopened containers under recommended conditions. |
Formulated high-heat sealants require a tackifier package that does not phase-separate from siloxane or silane-terminated polymer matrices during thermal aging. NOVARES TK120 is an aliphatic-modified C9 hydrocarbon resin with a nominal softening point near 120°C. The aliphatic fraction is selected where lower color and reduced aromatic fragment release are required in continuous service above 100°C. In compounding, the resin serves as a melt-flow modifier during application, a tack promoter on metal and glass substrates, and a hard-segment viscosity adjuster in filled systems. The following application scenarios separate the processing criteria, ratio windows, terminal parts, and compliance instruments relevant to high-heat sealant production.
In automotive powertrain sealants, the resin is screened in one-component oxime-cure RTV silicone for valve covers and oil pans. The recommended starting window is 3–8 percent by weight of total compound, added after fumed silica has been dispersed into the silanol-terminated polydimethylsiloxane base. Addition before silica wet-out causes thick masterbatch lumps that break down poorly in planetary mixing. The mixing vessel is a 200-L planetary mixer with vacuum capability below 10 kPa; final vacuum is held for less than 30 min to avoid low-molecular-weight siloxane stripping. Cured specimens are tested for tensile strength and elongation per ASTM D412-16, with elongation below 200 percent indicating the upper loading limit has been crossed. Adhesion to cast aluminium flanges is assessed by lap shear per ASTM D1002-10 after surface degreasing with n-heptane. Regulatory compliance for EU and US powertrain service is handled through REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU Annex II. The terminal component is a formed-in-place gasket for timing covers, oil pans, and valve covers, where continuous oil contact and intermittent exhaust-side heating determine the service envelope.
Domestic oven door gaskets use condensation-cure silicone pastes extruded onto glass-ceramic frames and cured at room temperature. NOVARES TK120 is pre-dissolved in a cyclic methylsiloxane carrier at a 1:1 mass ratio before metering into the batch; final resin solids are kept between 2 and 6 weight percent to prevent excessive Shore A hardness buildup. The processing line uses a 25-L butterfly mixer with scrape-wall agitation, jacket temperature set at 30°C ± 5°C, and vacuum below 5 kPa during final mixing. If the resin is not pre-dissolved, semi-solid residue lodges in the butterfly blade hub and requires hot-solvent cleaning between batches. The extruded bead is tested for peel adhesion to borosilicate glass-ceramic per ASTM C794-18 after 7 days cure at 23°C and 50% RH. Finished gaskets are evaluated for thermal resistance under the household cooking appliance safety standard EN 60335-2-6:2015; no visible exudation or coating separation is permitted. The terminal product is a heat-cured or room-temperature-cured oven door gasket sealant for ceramic glass and metal frames.
In ventilation duct flange sealants for industrial baking lines, NOVARES TK120 acts as a non-reactive rheology modifier in oxime-cure silicone compounds. The recommended screening range is 5–12 phr on hydrocarbon resin supplier data sheets for high-viscosity sealant tackification. The resin is added after calcium carbonate filler is wetted into the silanol PDMS; a high-shear rotor-stator head running at 1500 rpm improves distribution and shortens the masterbatch cycle. Vertical flange slump is evaluated with ASTM D2202-19, because the primary function is pseudoplastic thickening without destroying pumpability. Compression set is measured per ISO 815-1:2019 after 22 h at 175°C; published data for this specific configuration is limited, so production validation uses slump and compression set as pass-fail gates. The sealant is packed into 300-mL cartridges and applied as a continuous bead on flanged bakery tunnel oven ducts with continuous air temperatures between 160°C and 180°C. The terminal system is a high-temperature duct sealant where clean service and reduced volatile condensate accumulation are required.
Firestop sealants used in pipe penetrations require melt-flow control during the early phase of furnace exposure. NOVARES TK120 is compounded at 3–6 weight percent into an intumescent silicone base containing expandable graphite, ammonium polyphosphate, and zinc borate. The resin is added on a 60-L planetary mixer after the flame-retardant fillers have been wetted into the siloxane binder; this order prevents dry agglomerates from forming low-viscosity pockets that slump under fire loading. Fire test data are generated per ASTM E814 or EN 1366-4:2013, depending on target market. The aliphatic modification is assessed by residue integrity and smoke release during furnace testing; published data specific to this resin in intumescent silicone firestops is limited, so each batch is screened using a 1-hour furnace curve. The terminal product is a cartridge-applied firestop sealant for metallic and non-metallic pipe penetrations in concrete or masonry walls. Market compliance is addressed through EN 15651-1:2012 and the EU Construction Products Regulation for relevant sealant uses.
For heavy-duty charge-air duct boots in turbodiesel trucks, high-consistency silicone rubber compounds require a tackifier that does not release volatile condensate under post-cure. NOVARES TK120 is mixed at 2–4 weight percent into methyl silicone gum on a 40-L two-roll mill with a friction ratio of 1.2:1; the resin is added as a molten stream at 130°C to avoid roller band release and crumbing. After peroxide cure activation, the boot seal is post-cured for 4 h at 175°C. Residual volatiles are checked by noting condensation on a cooled glass plate after 24 h at 150°C; the aliphatic modification should reduce condensed residue compared with unmodified C9 controls under the same test. Published performance limits for this exact boot-seal configuration are not available in excipient databases, so validation remains product-specific through charge-air pressure decay tests. EU and US market access is assessed under REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU Annex II. The terminal part is a silicone boot and clamp seal for turbocharger-to-intercooler ducting.
Because butyl edge sealants are processed in heated gear-pump lines, the addition of NOVARES TK120 must be staged after elastomer breakdown to avoid uncontrolled tack rise in the feed throat. The resin is evaluated at 10–20 phr of the butyl elastomer, melted via a bulk melter at 170–180°C, and supplied through a gear pump into a continuous twin-screw kneader with an L/D of 44. Mixing time after resin injection remains between 20 and 40 min depending on temperature and shear. The tackified butyl compound is tested for melt mass-flow rate per ISO 1133-1:2022 and for static shear creep at 60°C under a 1-kg dead load for 24 h. Thermal stability is screened under oxidative aging because hydrocarbon resins above 120°C can contribute to surface skinning if oxygen access is not minimized. The terminal product is a heat-resistant butyl tape or block sealant for industrial glazing, sheet-metal overlap joints, and insulated edge sealing where hot-melt application and transport heat resistance are required.
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NOVARES TK120 is an aliphatic-modified aromatic C9 hydrocarbon resin supplied in solid flake or pastille form. The numerical designation 120 corresponds to a nominal ring-and-ball softening point of 120 °C when tested in accordance with ASTM E28 or ISO 4625-1. The product belongs to the NOVARES series of hydrocarbon tackifiers produced by Rain Carbon Inc. In high-heat sealant formulations, it functions as a tackifier and cohesion promoter, not as a low-cost diluent. The aliphatic modification lowers the aromatic character relative to pure C9 grades while retaining a higher glass-transition temperature than conventional C5 resins. Typical molecular weight distribution lies in the low oligomer range, with weight-average molecular weight measured by GPC generally below 2000 g/mol and polydispersity below 2.5; lot-specific values should be taken from the certificate of analysis.
Because the product retains a softening point above 100 °C, it can be used where sealants are exposed to engine compartment temperatures or hot-air ducting; however, the actual upper service temperature of the finished sealant is controlled by the polymer network, filler volume fraction, and crosslink density as well as the resin softening point. No claim for continuous service temperature should be derived from resin softening point alone; the parameter is a viscous-flow indicator, not a thermal stability limit. In a high-temperature butyl sealant, the resin is added at 10–40 phr relative to base polymer. The final addition level is determined by slump resistance, low-temperature flexibility, and peel adhesion requirements measured under the applicable end-use standard.
High-temperature sealant applications include engine compartment joint sealing, duct sealing in HVAC systems, and fire-rated penetration seals. In these systems, cold flow at elevated temperatures is a primary failure mode. The addition of a resin with a ring-and-ball softening point of 115–125 °C under ASTM E28 raises the temperature at which the compound begins to flow under its own weight. In butyl-based formulations, the resin is typically incorporated at 10–30 phr relative to the elastomer; above 35 phr, room-temperature peel adhesion measured by ASTM C794 may become brittle because the formulation glass-transition temperature moves above 60 °C.
Processing is usually carried out in a planetary mixer or sigma-blade compounder at 160–190 °C. The resin should be added after polymer mastication and filler dispersion to prevent prolonged high-torque mixing; torque increases of 10–20 % are typical during resin incorporation. Discharge temperature should not exceed 200 °C because Gardner color can increase by more than 2 units within 1 h at 210 °C as a result of oxidative reactions in residual unsaturation. Filled butyl sealants containing 20 wt% NOVARES TK120 have been processed on 40:1 L/D twin-screw extruders with barrel zones held at 150–170 °C. Batch-to-batch variation in filler moisture above 0.2 wt% at ambient relative humidity greater than 60 % requires pre-drying at 105 °C for 2 h to prevent bead void formation.
The manufacturer’s certificate of analysis for NOVARES TK120 should be checked against the property set below. The values are typical ranges for this grade; specification limits may vary by production site and should be confirmed with the supplier before incoming QC acceptance criteria are fixed.
| Property | Typical range | Test method |
|---|---|---|
| Softening point, ring and ball | 115–125 °C | ASTM E28 / ISO 4625-1 |
| Acid number | ≤1 mg KOH/g | ASTM D974 |
| Gardner color, 50 % in toluene | 5–7 | ASTM D1544 / ISO 4630 |
| Melt viscosity at 200 °C | 800–1600 mPa·s | ASTM D3236 |
| Glass transition temperature | 70–85 °C | ASTM D6604 / ISO 11357-2 |
| Volatile loss, 2 h at 180 °C | ≤0.5 wt% | ISO 3251 |
| Ash content | ≤0.1 wt% | ISO 3451-1 |
| Density at 25 °C | 1.04–1.08 g/cm³ | ISO 1183-1 |
Softening point is the critical incoming QC parameter because a shift of ±5 °C can alter melt viscosity at 180 °C by approximately 10–15 %. Melt viscosity is measured with a Brookfield viscometer and Thermosel system according to ASTM D3236; spindle and shear rate must be recorded because hydrocarbon resins are mildly shear-thinning at high filler loadings. Acid number below 1 mg KOH/g ensures minimal interaction with calcium carbonate fillers and no significant hydrolysis risk in humid service. Gardner color in the 5–7 range is acceptable for many light-grey sealants but may be visible in white top-coat systems; for water-white requirements, hydrogenated C9 grades with Gardner <1 under ASTM D1544 are required. Volatile loss is controlled to avoid bubble generation during hot-melt processing; at 180 °C, mass loss should remain below 0.5 wt% over 2 h. A sudden increase in volatile loss often indicates incomplete stripping of low-molecular-weight oligomers and can correlate with die-lip build-up.
For storage, the product should be kept below 40 °C and protected from moisture. Flakes or pastilles can block if stored above 50 °C. As a thermoplastic solid, no polymerization occurs in storage, but blocking may require mechanical break-up before automatic feeding. Regulatory documentation should include REACH registration status and confirmation that the product is not classified as hazardous under CLP. Where sealants are intended for food-contact applications, separate verification against FDA 21 CFR requirements is mandatory; hydrocarbon resin compliance cannot be assumed without reviewing the specific adhesive formulation and service conditions.
Pure C9 hydrocarbon resins provide high softening point at low cost, but their aromatic content produces Gardner color values commonly above 8 and a strong tendency to yellow under ultraviolet exposure. Aliphatic modification in NOVARES TK120 reduces the aromatic hydrogen-to-carbon ratio; the result is a resin that is still not water-white but is acceptable in many light-grey and off-white sealant compounds. QUV accelerated weathering under ASTM G154 cycle 1 shows a smaller ΔE shift for aliphatic-modified C9 than for pure C9 at equal softening point, although published data for this specific grade is limited.
Relative to hydrogenated C9 resins, NOVARES TK120 retains more residual unsaturation and therefore has lower oxidative stability at continuous temperatures above 180 °C. Hydrogenated grades with Gardner <1 are specified when color and UV stability are critical, but they often carry a 20–40 % higher price per kilogram and may require higher addition levels to match the cohesive strength of a 120 °C softening-point C9 resin. Relative to C5 hydrocarbon resins, TK120 has a higher softening point and glass-transition temperature; C5 resins typically soften at 80–110 °C and are preferred for low-temperature flexibility but do not provide the same slump resistance at 130 °C.
Relative to rosin ester tackifiers, NOVARES TK120 has an acid number below 1 mg KOH/g; rosin esters typically have acid numbers of 5–15 mg KOH/g and can interact with calcium carbonate fillers, increasing viscosity aging. However, rosin esters improve adhesion to polar substrates such as concrete and EPDM. Selection of TK120 should be based on the substrate and the required high-temperature cohesion rather than adhesion alone. Relative to DCPD hydrocarbon resins, TK120 may have a broader compatibility window with ethylene-vinyl acetate and APAO; DCPD resins contain cyclic unsaturation that can contribute to darkening under high-shear mixing above 200 °C. Manufacturer technical literature describes the aliphatic modification as broadening compatibility with EVA and APAO relative to standard C9 grades; quantitative solubility parameters can be obtained from the supplier for specific polymer grades.
On a 40:1 L/D twin-screw extruder operating at 160 °C, NOVARES TK120 is metered into the melt through side-feeding or liquid injection after the first kneading block. If the resin is mixed with solid elastomer at ambient feed, feed-zone blockage can occur because the resin softens at 115–125 °C and may coat screw flights. At 20 wt% addition in a filled EVA compound, the melt viscosity at 180 °C measured by ASTM D3236 is typically reduced by 30–50 % relative to the unfilled base polymer, depending on filler type. At addition levels above 35 wt%, the formulation glass transition can exceed 65 °C by ASTM D6604, reducing low-temperature peel flexibility. Addition level is therefore a property cliff-edge, not a linear adjustment, and must be optimized against the full sealant specification for high-temperature slump, adhesion, and cold-flex performance.
