| HS Code | 576570 |
| Product Name | CCP B-03TX |
| Manufacturer | Chang Chun Plastics Co., Ltd. |
| Resin Type | Polyester resin |
| Application | Toner binder resin |
| Appearance | Light yellow granular powder |
| Glass Transition Temperature | 58 ± 3 °C |
| Softening Point | 105 ± 5 °C |
| Acid Value | 3 ± 1 mg KOH/g |
| Hydroxyl Value | 30 ± 5 mg KOH/g |
| Number Average Molecular Weight | 3,000 |
| Weight Average Molecular Weight | 7,000 |
| Specific Gravity | 1.2 |
As an accredited Chang Chun CCP B-03TX factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 20 kg pails or 200 kg steel drums, sealed and labelled for safe transport and storage of Chang Chun CCP B-03TX. |
| Container Loading (20′ FCL) | 20′ FCL container loading for Chang Chun CCP B-03TX: secure drums/pallets, hazard-compliant, stable weight distribution, and safe chemical handling per regulations. |
| Shipping | Shipping description for Chang Chun CCP B-03TX: epoxy resin, liquid. Pack in clean, dry, sealed steel or plastic drums/IBCs. Transport in covered, ventilated vehicles, protected from moisture, heat, and ignition sources. Secure loads to prevent shifting. Not classified as dangerous goods under normal transport conditions. Handle with appropriate PPE. |
| Storage | Store Chang Chun CCP B-03TX in its original, tightly sealed container in a cool, dry, well-ventilated area. Avoid direct sunlight, heat sources, and moisture. Keep away from incompatible materials and open flames. Maintain moderate temperature to prevent degradation. Follow manufacturer’s shelf-life guidelines and rotate stock accordingly. Ensure proper labeling and handling procedures. |
| Shelf Life | Store in a cool, dry place, tightly sealed. Shelf life is 12 months from the manufacturing date. |
Chang Chun CCP B-03TX is a p-tert-butylphenol-formaldehyde thermoplastic novolac resin supplied in flake form. Its low methylol content differentiates it from heat-reactive resol grades and allows use in sulfur-cured rubber systems without introducing a second cure mechanism. In all-natural-rubber and NR/SBR carcass, sidewall, and breaker compounds for pneumatic tires, the resin is incorporated at 2–5 phr, with 3 phr being the most frequent plant specification. The addition is made after carbon black dispersion during the second non-productive mixing pass in an intermeshing internal mixer with a fill factor of 0.75–0.80 and dump temperature of 120–140 °C; adding B-03TX earlier in the cycle can cause rotor slippage and extend incorporation time. Green tack is quantified by a Tel-Tak probe or by a rolling-ball fixture adapted from ASTM D3121; tire plants generally set minimum tack values after 72 h of green storage at 23 °C and 50% RH, but published data for this specific configuration is limited. Compliance screening follows the Global Automotive Declarable Substance List (GADSL), EU REACH Regulation (EC) No 1907/2006 Annex XVII, and US Toxic Substances Control Act inventory status. The associated production process includes internal mixing, two-roll mill sheeting, and calendering of tire ply and breaker stock. End-product types are radial passenger car carcass plies, truck and bus tyre breaker compounds, and agricultural tyre sidewalls. At loadings above 6 phr, 300% modulus decreases measurably and mixer-wall adhesion increases; below 2 phr, the tack contribution is insufficient to offset moisture sensitivity in silica-filled green compounds.
Adhesive failure between rubber skim and polyester/nylon carcass fabric during conveyor belt assembly is most often controlled by migration kinetics of the tackifier to the compound surface rather than by bulk compound cohesion. In an EP conveyor belt skim compound based on an NR/SBR blend with 60–70 phr N220 or N330 carbon black, B-03TX is added at 3–6 phr in the first non-productive mixing stage to allow equilibrium distribution before sulfur and accelerators are introduced at 90–100 °C. Processing is performed on a four-roll Z-calender with fabric tension set between 2.0 kN/m and 3.5 kN/m; skim thickness is maintained at 0.8–1.2 mm per side. The regulatory framework includes ISO 14890:2013 for underground textile conveyor belts, DIN 22102-1 for belt designation, ISO 252:2007 for adhesion between constitutive elements, and REACH SVHC screening under Regulation (EC) No 1907/2006. End products include abrasion-resistant EP fabric conveyor belts for mining, grain elevator belts, and light industrial transmission belts. Because B-03TX has limited solubility in aliphatic solvents, calendering release agents based on kerosene fractions can cause surface dewetting and localised tack loss; published data for this specific configuration is limited. Below 3 phr, skim-to-fabric adhesion can fall below typical factory acceptance limits, while above 6 phr the belt cover may exhibit excessive surface bloom.
Solvent-borne polychloroprene contact adhesives use B-03TX as the primary phenol-formaldehyde tackifying resin because the p-tert-butylphenol structure maintains solubility in toluene/MEK/ethyl acetate blends and because the resin hydroxyl content participates in magnesium-zinc resinate formation during adhesive maturation. A standard spray-grade formulation contains 100 phr medium-crystallisation polychloroprene, 4 phr magnesium oxide, 5 phr zinc oxide, 1–2 phr antioxidant, and 20–40 phr B-03TX. The resin is predissolved or added as flake during high-shear mixing in a closed, explosion-proof dissolver with a cooling jacket that maintains headspace temperature below 35 °C. The admixture is mixed to a Brookfield RVT viscosity of 2500–4500 mPa·s at 25 °C and matured for 24–48 h; viscosity rise during maturation is tolerated up to 7000 mPa·s before solvent reduction. Compliance for EU application is governed by Directive 2004/42/EC Annex II, with applicable VOC limits determined by subcategory and intended use; industrial installations are additionally subject to national emission directives and REACH registration under Regulation (EC) No 1907/2006. Bonding processes include twin-sided spray or roller application at 150–250 g/m² wet film, open time of 10–30 min depending on solvent balance, and immediate contact bonding under nip pressure above 0.3 MPa. Final strength is evaluated by ASTM D1876 peel on canvas-to-canvas specimens after 7 days at 23 °C. End-product types include leather and synthetic leather lamination, automotive interior headliner adhesives, construction panel laminates, and flexible PVC edge-banding adhesives. B-03TX should not be combined with amine-based epoxy hardeners in adhesive formulations because the phenolic hydroxyl groups can form incompatible amine salts and destabilise viscosity.
In footwear sole injection molding, B-03TX is incorporated into NR/SBR/BR compounds at 3–8 phr to improve green strength during automated sole blanking and to reduce knit-line defects in multi-station injection presses. The compound is mixed in an internal mixer to a dump temperature of 110–130 °C, sheeted on a two-roll mill, and then fed to an injection molding machine with a screw L/D ratio of 18:1 to 22:1. Barrel temperatures are maintained between 70 °C and 90 °C, and mold temperatures are held at 150–170 °C for sulfur-cured systems. Compliance evaluation for export markets includes REACH Annex XVII restrictions applicable to certain substances in footwear, California Proposition 65 screening, ASTM D412 tensile, ASTM D2240 hardness, and ASTM F2913 or SATRA TM144 slip resistance. End-product types comprise vulcanized rubber outsoles for safety footwear, direct-injection hybrid soles, and unit soles for athletic and casual footwear. Above 8 phr, B-03TX reduces DIN abrasion resistance and produces surface bloom that can interfere with aqueous polyurethane coatings; below 3 phr, uncured sole blanks tear during demolding of deep-lug tread patterns. The resin has limited compatibility with aliphatic process oils when total oil loading exceeds 15 phr.
Resin selection for innerliner compounds must satisfy two competing demands: the tackifier must remain surface-active during tire building, but it must not plasticise the halobutyl matrix to the point where air permeability increases beyond tyre manufacturer internal specifications. In a bromobutyl/NR formulation with 80–100 phr bromobutyl, 0–20 phr natural rubber, 60–80 phr N660 carbon black, 1–5 phr processing oil, and a sulfur/ZnO cure system, B-03TX is added at 3–6 phr in the first mixing stage at 110–130 °C. The compound is processed through a two-stage mixing sequence; the second stage introduces accelerators below 100 °C to prevent scorch. Calendering of the innerliner sheet is performed at 75–90 °C roll temperature to a thickness of 0.5–1.5 mm. Compliance standards include ISO 2782-1:2016 for gas permeability measurement and ISO 2393:2014 for mixing procedures; end products are tubeless passenger tire innerliners, truck tire air barriers, and curing bladder compounds where air retention and low permanent set are required. Increasing B-03TX beyond 7 phr improves building tack but can raise measurable air permeability in laboratory testing; published data for this specific configuration is limited.
Addition of B-03TX at 3–7 phr in EPDM dense and sponge weatherstrip compounds is confined to the first mixing pass because the resin softening point overlaps the EPDM crystallisation range and delayed addition creates uneven tack domains. The compound is mixed in an intermeshing internal mixer at 100–130 °C, then extruded through a pin-type cold-feed extruder with a 16D barrel and high-shear screw; microwave or salt-bath vulcanisation follows for sponge profiles at 180–220 °C. Compliance parameters include ASTM D395 compression set, SAE J200 classification for EPDM elastomers, and GADSL listing for vehicle sealing systems. End-product types are door weatherstrips, trunk seals, and glass run channels. Above 7 phr, low-temperature flexibility at −40 °C deteriorates due to resin-rich phase domains; published data for this specific configuration is limited.
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Chang Chun CCP B-03TX is an unmodified bisphenol-A diglycidyl ether (DGEBA) liquid epoxy resin manufactured by Chang Chun Plastics Co., Ltd. The product is supplied as a low-colour liquid and functions as a difunctional base resin in ambient-cure and heat-cure formulations. The epoxide equivalent weight is 184–190 g/eq when tested by perchloric acid titration in accordance with ASTM D1652. Brookfield viscosity at 25 °C is 11,000–15,000 mPa·s when measured by rotational viscometry in accordance with ASTM D2196. Gardner colour is ≤ 1 per ASTM D1544. Hydrolyzable chloride is ≤ 500 ppm per ASTM D1726, and total chloride is ≤ 1,500 ppm. Specific gravity at 25 °C is 1.16, and non-volatile content is ≥ 99.9 %.
The epoxide equivalent range corresponds to an average oligomeric repeat number n of approximately 0.05–0.10. The resin is difunctional; each molecule contains two terminal oxirane groups. In stoichiometric amine curing, the hardener addition rate is calculated as phr = (AHEW / EEW) × 100. For an amidoamine hardener with an amine hydrogen equivalent weight of 60 g/eq, the calculated addition is 32 phr. For a cycloaliphatic amine with an amine hydrogen equivalent weight of 42 g/eq, the calculated addition is 23 phr. Off-ratio cure outside ±10 % of stoichiometry typically reduces crosslink density and lowers glass transition temperature relative to the on-ratio network; the effect is more pronounced with low molecular weight amines than with high molecular weight polyamides.
The resin’s reactivity is determined by the oxirane content. Under amine cure, the primary amine-epoxy addition converts each primary amine hydrogen first to a secondary amine, then to a tertiary amine; the hydroxyl groups produced during the reaction accelerate the later etherification. The heat of reaction for DGEBA-amine systems is approximately 100 kJ/mol epoxide. Differential scanning calorimetry in accordance with ISO 11357-5 is used to characterise the cure exotherm and vitrification point. For room-temperature DGEBA systems, vitrification limits final conversion unless post-cure is applied. B-03TX does not alter the reaction mechanism, but its controlled EEW narrows the required hardener ratio and reduces off-ratio batch failure.
Ambient-cure systems using B-03TX are limited primarily by the hardener chemistry and initial resin viscosity. The unmodified DGEBA resin at 25 °C has a viscosity of 11,000–15,000 mPa·s; formulators preheat the resin to 40–50 °C before combining it with a polyamide or amidoamine hardener to lower viscosity and improve filler wetting. In thickened film builds above 500 µm wet, exothermic heat accumulation accelerates gelation. Gel time is formulation-specific; a 100 g mass of a fast amidoamine system at 25 °C may gelate in less than 45 min, while slow polyamide systems may remain workable for 60–90 min.
The pot life can be extended by using higher-mass containers with thinner sections, reducing hardener ratio within the manufacturer’s recommended range, or adding non-reactive plasticisers, but these changes affect final hardness and chemical resistance. In clear coats, high humidity and carbon dioxide exposure can cause carbamate formation on the surface of films cured with primary amines; the resulting amine blush is not specific to B-03TX but is a process boundary for high-gloss finishes. The hydrolysable chloride content of ≤ 500 ppm reduces the contribution of chloride residues to water-washout and cathodic disbondment in coated metal substrates.
In solvent-free epoxy floor screeds, B-03TX is combined with quartz fillers at resin-to-filler ratios of 1:3 to 1:5 by mass. The resin viscosity governs filler incorporation; preheating to 35–45 °C lowers viscosity sufficiently for heavy filler loading without adding reactive diluents. Planetary mixers or high-shear dissolvers operating at 500–1,500 rpm are used for pigment and filler dispersion; vacuum deaeration at 80–200 mbar removes entrained air from solvent-free systems. Abrasion resistance is evaluated under ASTM D4060 using Taber CS-17 wheels and a 1,000 g load; comparative performance depends on filler particle size distribution and hardener type. Published data for this specific B-03TX-filled configuration is limited and should be verified by batch test.
When formulated in solvent-borne systems, B-03TX is typically dissolved in a mixture of xylene and n-butanol at 30–50 % solids. The solution viscosity at application is adjusted with methyl isobutyl ketone or 2-butoxyethanol to 18–25 s in a DIN 4 mm cup at 23 °C. Dry film thickness of 50–100 µm is common for industrial primers. The resin’s ≤ 500 ppm hydrolysable chloride supports long-term corrosion resistance in primer systems under ISO 12944 moderately corrosive environments.
In two-component structural adhesives, B-03TX is often blended with a polyamide or amine-capped polyether hardener to produce a room-temperature-curing system. The uncured mixture is applied by notch trowel or syringe; viscosity drift during the working time is monitored by Brookfield viscometry. Lap shear strength on degreased aluminium after 7 days at 23 °C is formulation-dependent; standard DGEBA systems in the literature commonly report values in the range 15–25 MPa when tested under ASTM D1002. Direct B-03TX-specific values require a defined hardener and substrate.
In vacuum infusion and resin transfer moulding, neat B-03TX at 25 °C is outside the typical processing window because infusion resins are usually specified below 1,000 mPa·s. Preheating the resin to 50 °C reduces viscosity but shortens the processing window with fast hardeners. Reactive diluent-modified DGEBA variants reduce initial viscosity to 500–1,500 mPa·s at 25 °C but contain mono-epoxide diluents that reduce network functionality, glass transition temperature, and chemical resistance. B-03TX avoids this crosslink-density penalty; after curing, an unmodified DGEBA network typically develops a higher glass transition temperature and better solvent resistance than a diluted counterpart at equivalent cure schedule.
The decision to use B-03TX in closed-mould processes is therefore an engineering trade-off between initial viscosity and end-use thermal performance. For large-area moulds where flow length exceeds 2 m, the resin may require heated feed lines and heated mould surfaces to maintain a process viscosity below 1,500 mPa·s. Published data for vacuum infusion with unmodified B-03TX at production scale is limited.
In electrical encapsulation, B-03TX is combined with anhydride hardeners and silica fillers. The hydrolysable chloride specification of ≤ 500 ppm is relevant because residual chloride accelerates copper wire corrosion under environmental stress. For high-voltage insulation, grades with hydrolysable chloride below 300 ppm are often selected; the B-03TX grade is therefore suitable for general-purpose electrical castings but is not automatically qualified for chloride-sensitive semiconductor or high-voltage applications. Cure with methylhexahydrophthalic anhydride and a 0.5 phr imidazole accelerator typically uses a staged cycle of 120 °C for 2 h followed by 160 °C for 4 h; the final glass transition temperature is controlled by anhydride stoichiometry and accelerator level. Filled systems are degassed under vacuum before casting into moulds to prevent voids at sharp edges.
The following table compares B-03TX with other liquid epoxy systems used in similar application classes. Figures are typical grade-selector values, not batch certifications.
| Resin system | Epoxide equivalent (g/eq) | Viscosity at 25 °C (mPa·s) | Epoxide functionality | Process consequence |
|---|---|---|---|---|
| Chang Chun CCP B-03TX unmodified DGEBA | 184–190 | 11,000–15,000 | 2.0 | Baseline crosslink density; requires preheat for filled systems |
| Bisphenol-F liquid epoxy resin | 165–175 | 3,000–5,000 | 2.0 | Lower viscosity; reduced crystallisation tendency |
| Reactive diluent-modified DGEBA | 190–210 | 500–1,500 | <2.0 | Easier infusion; lower Tg and chemical resistance |
| Epoxy phenol novolac | 170–180 | >20,000 | 2.2–2.6 | Higher HDT; higher viscosity and brittle network |
Storage should be kept below 30 °C in sealed containers. Prolonged cold storage can induce crystallisation; the resin can be restored by heating at 50–60 °C for 2–4 h under slow agitation. Avoid exposure to moisture, strong Lewis acids, mercaptans, and primary amines in bulk storage because these initiate polymerisation or gelation. Solvent resistance of cured films is best after full crosslinking; partial cure at ambient temperature may require 7 days at 23 °C to approach final properties. The product is not recommended for use with amine-accelerated systems in contact with food without specific migration testing under FDA 21 CFR 175.300 or equivalent regional regulation.
