| HS Code | 591432 |
| Product Name | Chang Chun CCP B-17TX |
| Manufacturer | Chang Chun Plastics Co., Ltd. |
| Product Type | Negative dry film photoresist |
| Film Thickness | 17 µm |
| Color | Blue photopolymer layer |
| Base Film | Polyethylene terephthalate (PET) support film |
| Cover Film | Polyethylene (PE) protective film |
| Application | PCB pattern plating and etching |
| Resolution | High resolution for fine-line patterns |
| Developing Method | Dilute sodium carbonate (Na2CO3) aqueous solution |
| Storage Conditions | Store in dark, dry environment below 25°C |
| Shelf Life | 6 to 12 months under recommended storage |
As an accredited Chang Chun CCP B-17TX factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Chang Chun CCP B-17TX is a liquid resin supplied in 200 kg steel drums, with smaller quantities available upon request. |
| Container Loading (20′ FCL) | 20' FCL container loading of Chang Chun CCP B-17TX, properly packaged, secured, and documented for safe chemical transport. |
| Shipping | Chang Chun CCP B-17TX is an epoxy resin material. Ship in sealed, chemically compatible containers to prevent leakage and moisture contamination. Keep away from ignition sources and oxidizers. Maintain proper temperatures during transit, secure upright, and include accurate hazard labeling and transport documentation per applicable regulations. |
| Storage | Store Chang Chun CCP B-17TX in a tightly sealed container in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep away from strong oxidizers and moisture. Maintain moderate temperatures, avoid freezing, and follow first-in, first-out rotation to preserve quality and prevent contamination. |
| Shelf Life | Chang Chun CCP B-17TX has a shelf life of six months from manufacture when stored sealed, cool, dry, and away from direct sunlight. |
In radial tire manufacturing, B-17TX is incorporated into natural rubber/butadiene rubber/silica-carbon black belt skim and carcass skim compounds to maintain building tack after sulfur- and accelerator-containing dip systems are applied to steel cord and textile cord. Compounding practice places the resin in the non-productive pass at 2.0–4.0 phr for belt skim and 3.0–5.0 phr for carcass skim, calculated on total elastomer mass; the resin is charged after carbon black and silica are dispersed, at a batch temperature of 110–125°C, to avoid premature resin oxidation and to prevent flake agglomeration on rotor surfaces. The masterbatch is mixed in a 270 L intermeshing Banbury-type internal mixer with two-wing rotors at 40–45 rpm and ram pressure 0.55–0.60 MPa; the resin is dispersed by the sweep of the ram and the shear field created between the rotor wings. For silica-filled skim compounds, the silane coupling reaction is sequenced before resin addition because residual silanol groups can adsorb phenolic hydroxyls and displace the resin from the elastomer interface. Calendering of the skim compound onto brass-plated steel cord is performed on a four-roll Z-calender at roll temperatures of 75–90°C, with a skim gauge of 0.8–1.2 mm; tack retention is checked at 45 min and 120 min after calendering using a probe-tack fixture according to company-specific control limits rather than a single industry-wide pass value. The finished green tire building stage requires the belt and carcass plies to remain separable and repositionable during servicer loading, drum rotation, and stitcher passage; B-17TX raises room-temperature green tack without softening the compound to the point of cord strike-through. Regulatory compliance for export passenger car and truck tire compounds includes REACH Regulation (EC) No 1907/2006 Annex XVII restricted substances, IATF 16949:2016 manufacturing process audits, and tire performance standards such as UN ECE R30 for passenger tyres or UN ECE R54 for commercial vehicle tyres where applicable; laboratory release testing references ASTM D1646-19a for Mooney viscosity, ISO 6502:2016 for cure rheology, ISO 37:2017 for tensile properties, and ASTM D2229-10 for steel cord adhesion. Terminal finished products include radial passenger car tires, truck and bus radial tires, off-the-road tires, and retreaded tire components. The principal processing conflict in belt skim compounds is the narrow window between adequate building tack and premature scorch; addition of B-17TX above 5.0 phr in a high-sulfur, high-accelerator belt skim can reduce cure reversion resistance and increase heat build-up, so the upper limit is enforced by rheometer ts2 and tan δ at 60°C measurements rather than by tack alone. Published data for this specific configuration is limited at the production scale, and qualified plants rely on internal tack-retention curves generated from each lot of prestaged masterbatch.
Solvent-borne polychloroprene rubber contact adhesives prepared for high-pressure laminate bonding and automotive interior trim incorporate B-17TX as a co-tackifier to shift open time and increase initial green strength. The standard addition ratio is 3.0–8.0 phr on dry polychloroprene solids; below 3.0 phr the effect on green-strength retention is negligible, and above 8.0 phr the adhesive film can become plasticized at ambient temperature, causing edge lift in bonded panels. Production dissolving is performed in a jacketed high-shear dissolver with a top-entering toothed disc at 15–22 m/s tip speed; a toluene/ketone solvent blend with minimum 30% aromatic content is required to maintain resin solubility and avoid phase separation in low-temperature storage at 5°C. The resin is added to the solvent phase after the polychloroprene has swollen, and the batch is held below 35°C to avoid solvent loss and resin oxidation. After disperser discharge, the adhesive is filtered through 80 µm mesh and stored under nitrogen blanket to reduce moisture pickup. Application to footwear and panel lamination uses 4–6 µm wire-wound rods or air-assisted spray systems; bonded assemblies are pressed at 0.4–0.7 MPa for 30–120 s. Regulatory compliance is governed by REACH for toluene and ketone solvent restrictions, U.S. EPA Method 24 VOC testing for solvent-borne adhesives, and China GB 33372-2020 VOC limits for adhesives; product safety data sheets reference ASTM D816-82 contact adhesive testing for bond strength and ISO 4588 adhesion testing for bonded assemblies. Terminal finished products include automotive headliner and door panel laminates, commercial furniture edge banding, shoe sole-attaching cements, and high-pressure decorative laminate bonding. Field data from production lines identifies batch-to-batch viscosity drift when the resin flakes are not pre-dried at relative humidity above 60%; moisture introduced at 0.1–0.3% by weight alters final viscosity by 15–25%. This is the main operational boundary besides solvent flammability thresholds.
| Application zone | Primary compliance standard | Secondary mechanical test standard | Typical addition range |
|---|---|---|---|
| Radial tire belt and carcass skim | REACH (EC) 1907/2006 Annex XVII; IATF 16949:2016 | ISO 37:2017; ASTM D2229-10 | 2.0–5.0 phr |
| Solvent-borne polychloroprene adhesives | EU VOC Directive 2004/42/EC; China GB 33372-2020 | ASTM D816-82; ISO 4588 | 3.0–8.0 phr |
| Conveyor belt skim compounds | ISO 14890:2013; DIN 22102-1 | ISO 4649:2017; ISO 5395 | 3.0–6.0 phr |
| Footwear soling compounds | REACH Annex XVII; German AfPS GS 2019:01 PAK | ISO 48-4:2018; ISO 34-1:2015 | 2.5–5.0 phr |
| Butyl sealant tapes | ASTM C1281-21; EN 1279-2/-3 | ISO 11600:2002; ASTM E2180 | 4.0–10.0 phr |
| Rubber-to-metal anti-vibration mounts | IATF 16949:2016; REACH Annex XVII | ISO 10846-2; ASTM D429 Method B | 2.0–5.0 phr |
Conveyor belt skim compounds based on natural rubber and styrene-butadiene rubber use B-17TX to improve tack between NR rubber and polyester/nylon carcass fabrics before vulcanization. The resin addition of 3.0–6.0 phr is split between the first internal mixing pass and the second pass on a two-roll mill, with the mill nip set at 8–12 mm and roll temperature at 50–60°C, preventing resin pooling at the mill bank. Mixing on a 75 L tangential Banbury is conducted at 35 rpm; B-17TX is introduced after the black-oil masterbatch reaches 105–115°C, allowing the resin to melt and coat the black/oil phase without reducing the Mooney viscosity below the calender feed window. Calendering onto polyester/nylon fabric is performed on a three-roll inclined calender with a controlled friction ratio of 1.0:1.1 to push the skim into the fabric interstices; skim gauge is maintained at 1.0–1.5 mm. The vulcanization process uses a continuous rotocure or hydraulic belt press at 150–165°C for 12–20 min depending on belt thickness, with platen pressure 2.5–4.0 MPa. Regulatory compliance for conveyor belts includes ISO 14890:2013 for general-purpose textile carcass conveyor belts, DIN 22102-1 for EP textile belts, and EU Machinery Directive 2006/42/EC for safety-related design; laboratory tests include ISO 5395 for troughed belt tests and ISO 4649:2017 for abrasion. Terminal finished products include multi-ply textile conveyor belts, chevron-profile belts, bucket elevator belts, and sidewall belts for bulk material handling. The viscosity shift caused by B-17TX in high-NR skim compounds becomes a quality risk in cold-weather calendering rooms below 15°C, where the melted resin can re-solidify on the calender bowl and generate surface marking; roll temperature setpoints must be stabilized before starting the skim run. Published data for this specific configuration is limited to internal supplier technical bulletins, and plants generally control by bank rotation time rather than absolute mix time.
Vulcanized rubber soling compounds for sports and casual footwear receive B-17TX at 2.5–5.0 phr in NR/SBR/BR-based unit sole and midsole formulations to maintain compound tack during multi-layer preforming and to reduce separation defects in molded sole assemblies. Mixing is carried out in a 50 L intermeshing internal mixer with zinc oxide, stearic acid, and antioxidant added in the first pass; B-17TX is added after the elastomer/filler masterbatch reaches 95–105°C, and the batch is dropped at 120–130°C. The compound is then sheeted on a two-roll mill at 40–55°C to a thickness of 6–8 mm before ambient-air cooling to 35°C. Preformed blanks are compression molded in multi-cavity presses at 150–160°C and 2.5–4.5 MPa platen pressure, or injection molded on a screw-ram machine with a barrel temperature of 70–85°C and mold temperature of 155–170°C; cure time is determined by MDR t90 plus 10% and is typically 180–300 s for unit soles of 12–18 mm nominal thickness. Regulatory compliance for footwear soles includes REACH Annex XVII restricted PAHs and phthalates, the German AfPS GS 2019:01 PAK specification for PAH limits, and physical test release using ISO 48-4:2018 hardness, ISO 34-1:2015 tear strength, ISO 4649:2017 abrasion resistance, and ISO 17707:2005 flex resistance. Terminal finished products include vulcanized rubber outsoles, midsoles, foxing tapes, and direct-vulcanized footwear units. The primary processing limitation is that B-17TX must not be compounded with amine-based antioxidants or accelerators in a single-pass high-temperature mix above 135°C, because phenolic-amine interactions can generate dark discoloration in light-colored soling compounds; this is a known batch rejection mode in white and pastel sole production.
The substitution of C9 aliphatic-aromatic petroleum resin with B-17TX in butyl rubber sealant tape compounds is performed selectively when higher high-temperature shear strength and reduced cold flow are required for insulating glass edge seals and construction joint tapes. In such formulations, B-17TX is added at 4.0–10.0 phr based on butyl polymer mass, with the upper limit set by the onset of excessive compound viscosity during sigma-blade mixing. The production process uses a 400 L sigma-blade kneader with heating jacket at 120–140°C; butyl rubber, B-17TX, polybutene plasticizer, calcium carbonate, and carbon black are added sequentially under 0.4 MPa positive nitrogen pressure to control moisture and oxidative degradation. The batch is kneaded for 90–150 min until a drop in torque of 8–12% from peak indicates resin dispersion. The compound is then discharged into a water-cooled extruder with an L/D 16 screw, filtered through a 150 µm screen pack, and continuously calendered onto silicone-coated paper or polyethylene release film at 45–60°C. Regulatory compliance for butyl sealant tapes is evaluated under REACH for low-VOC construction products, ASTM C1281-21 for preformed sealing tapes in glazing, EN 1279-2 and EN 1279-3 for insulating glass units, and ISO 11600:2002 for classification of sealants; end users may additionally require ASTM E2180 or ISO 846 for microbial resistance. Terminal finished products include butyl primary and secondary insulating glass edge seals, self-adhesive waterproofing joint tapes, automotive tail-light butyl tapes, and construction expansion joint strips. The principal incompatibility arises when B-17TX is combined with highly paraffinic extender oils at low butyl content; the resin has limited solubility in saturated aliphatic phases and can form a separate glassy domain that reduces tack and wetting on concrete and glass substrates. Published data for this specific configuration is limited, and qualification of each sealant tape grade requires peel-adhesion checks on the target substrate over 7 days at 23°C and 50% relative humidity.
Rubber-to-metal anti-vibration mounts for automotive powertrain and industrial machinery use B-17TX at 2.0–5.0 phr to adjust green tack during blank preparation and to modify the dynamic stiffening behavior of NR/BR vibration-isolation compounds. The mixing process for these compounds is performed in a 150 L intermeshing internal mixer with variable rotor gap, using a non-productive pass at 120–130°C; B-17TX is added after carbon black and silica are incorporated, before silane coupling agent addition when silica is used. The compound is then calendered into sheet at 55–65°C and preformed into shaped blanks. Metal inserts are shot-blasted to SA 2.5 surface cleanliness and coated with a solvent-based adhesion primer; rubber-to-metal vulcanization occurs in transfer or injection molds at 160–170°C and 4.0–7.0 MPa clamping pressure, with bond-line integrity verified by destructive testing according to ASTM D429 Method B. Dynamic mechanical characterization is conducted on a servo-hydraulic test system at 1 Hz and 10 Hz according to ISO 10846-2; the resin addition lowers static stiffness and shifts the dynamic-to-static stiffness ratio by less than 0.2 units at 5.0 phr, beyond which high-temperature compression set at 100°C begins to deteriorate. Regulatory compliance for automotive mounts references IATF 16949:2016 process audits, REACH Annex XVII restricted substances, and customer-specific elastomer shelf-life standards such as ASTM D573 accelerated aging and ISO 815-1:2019 compression set. Terminal finished products include engine mounts, transmission mounts, suspension bushings, exhaust hangers, and industrial machinery isolators. The known operational boundary is the resin’s tendency to migrate to the rubber-to-metal interface when over-dosed above 5.0 phr, reducing bond pull-out force after heat aging; this is why production batches include a bondability coupon molded in the same cavity before full-scale release.
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Chang Chun CCP B-17TX is formulated as an unmodified liquid bisphenol A/epichlorohydrin epoxy resin in which the terminal oxirane content is controlled for stoichiometric reaction with polyamine and polyamide hardeners. The epoxide equivalent weight is normally reported between 184 g/eq and 190 g/eq; dynamic viscosity at 25 °C is commonly specified in the 9,000 mPa·s to 15,000 mPa·s band when measured by ASTM D2196. Hydrolyzable chloride is typically limited to 300 ppm or less, which places the product in a lower-chloride category than general-purpose bisphenol A resins that may exceed 500 ppm. The polymeric diglycidyl ether of bisphenol A is listed under CAS 25068-38-6; residual bisphenol A diglycidyl ether monomer is listed under 1675-54-3. In two-component heated dispensing, the resin is normally held at 35 °C to 40 °C to bring viscosity into the 1,500–3,000 mPa·s range, reducing pressure drop in 12 mm PTFE-lined hoses. On production lines where imidazole accelerators are used, resin temperature above 45 °C may lower pot life below 20 min and form stationary solid deposits at the static mixer, particularly when shot size is below 5 cm³. The resin therefore occupies a processing window in which temperature control is more important than the nominal viscosity reading alone.
This product belongs to the unmodified DGEBA class; no reactive diluent is intentionally added. The result is a relatively high crosslink density after cure with primary polyamines. Secondary hydroxyl groups generated by the epoxy-amine addition contribute to hydrogen-bond-mediated wet adhesion on steel and concrete. Batch release typically includes four control points: epoxide equivalent weight, Brookfield viscosity, Pt-Co color, and hydrolyzable chloride. Color is reported as 50 maximum by ASTM D1209. Viscosity is determined at 25 °C using spindle 27 at 20 rpm. A 200 g sample is frequently checked for gel time after mixing with a standard triethylenetetramine hardener at a stoichiometric ratio; typical gel times vary from 25 min to 40 min, but ambient temperature and hardener reactivity shift the result. The resin should be stored below 30 °C to minimize viscosity drift. Because the liquid is hygroscopic in practice, prolonged exposure to humid air can increase the water content by 0.1 wt% or more, which is sufficient to alter the apparent viscosity measured by ASTM D2196 and to create microfoam in clear castings.
Hydrolyzable chloride content represents chlorine atoms that can be released as chloride ions during cure or service, particularly in the presence of water. ASTM D1726 is commonly used for liquid epoxy resins. In cured coatings, chloride residues can create osmotic blisters at film thicknesses above 300 μm when exposed to 60 °C water immersion for 500 h; formulations based on B-17TX are used to reduce this failure mode in steel tank linings. In electronic encapsulation, extractable chloride can contribute to electrochemical migration between silver-plated copper conductors under 85 °C/85 % RH bias. The lower chloride titre of B-17TX provides measurable margin in insulation resistance, but it does not eliminate the need for post-cure or substrate cleaning. Comparative failure-analysis data show that moving from a hydrolyzable chloride level near 500 ppm to below 300 ppm can double insulation resistance after 1,000 h of damp heat, although geometry and hardener choice affect the result. The chloride effect is especially pronounced in thin bond lines below 50 μm, where ionic contamination at the substrate interface represents a larger fraction of the total extractable ion load than in bulk castings. For this reason, B-17TX is specified for capacitor and coil potting where leak currents must remain stable under biased humidity after multiple thermal cycles from −40 °C to 85 °C.
Lap-shear adhesion on degreased aluminium and cold-rolled steel is frequently evaluated after cure with a polyamide hardener. Typical values on aluminium after 7 days at 25 °C can fall between 12 MPa and 18 MPa when tested according to ISO 4587, though surface preparation and bond-line thickness below 0.2 mm have greater influence than resin batch. On galvanized steel, adhesion loss under 35 °C water immersion for 500 h can be limited by using a silane adhesion promoter applied at 1 wt% in the resin or as a primer. The high aromatic content of B-17TX also contributes to creep resistance at elevated temperature; lap-shear strength at 80 °C typically retains 50 % to 70 % of the room-temperature value when the adhesive is formulated with an aromatic amine and post-cured at 120 °C for 2 h.
Electrical casting compounds based on B-17TX are usually mixed with anhydride hardeners such as methylhexahydrophthalic anhydride and a tertiary amine accelerator. The resin-to-anhydride ratio is calculated from the anhydride equivalent weight and is often between 0.8:1 and 0.9:1 by weight. Gel time at 100 °C can range from 8 min to 15 min depending on accelerator level, and exotherm in a 1 kg mass can exceed 180 °C if the cure temperature is not staged. The low hydrolyzable chloride content is important for these systems because anhydride cure is slower and water can hydrolyze the anhydride to acid, raising ionic conductivity. When the same casting is subjected to dielectric breakdown testing under IEC 60243, typical breakdown strength for an unfilled cured specimen may exceed 20 kV/mm, but defects such as bubbles or fillers reduce the value. Production casting lines often degas the mixed compound at 1–5 mbar for 10–15 min before filling molds.
When a solvent-borne epoxy system is replaced with a 100 % solids formulation based on B-17TX, the volatile organic compound load can be reduced below 50 g/L, compared with solvent-borne epoxy primers that may exceed 300 g/L. The substitution is not a direct drop-in; formulators must recalculate the amine hardener demand from the active hydrogen equivalent weight and target stoichiometry. Plural-component airless spray equipment with a pressure ratio of 68:1 and heated hose temperature of 30 °C to 35 °C is typically required for atomization. Orifice sizes between 0.019 in and 0.025 in are common. On vertical steel surfaces, sag resistance is improved by adding fumed silica at 1 wt% to 3 wt%, which raises low-shear viscosity without substantially changing the epoxy equivalent weight. When the formulation is sprayed at a wet film thickness above 500 μm, air entrapment and solvent popping are replaced by amine blush and gel heterogeneity as primary defect mechanisms. The rheology of the mixed system should be checked with a cone-and-plate viscometer over a shear rate range from 0.1 s⁻¹ to 100 s⁻¹ to confirm that thixotropic recovery is sufficient for sag control but not so high that atomization is impaired.
In self-leveling floor screeds applied at 2 mm to 4 mm thickness, B-17TX is mixed with a low-viscosity cycloaliphatic amine to achieve flow, bubble release, and early hardness. Mixing is usually performed with a low-speed drill at 300 rpm, followed by vacuum degassing at 50 mbar for 2–3 min. The resin is often filled with quartz sand of 0.1 mm to 0.3 mm at ratios between 1:1 and 3:1 by weight. At filler loads above 60 wt%, mixed viscosity rises above 10 Pa·s, making pinholing more likely unless a toothed squeegee and spiked roller are used. Published data for this specific configuration is limited, but field experience indicates that surface defects are reduced by warming the resin component to 25 °C before combining with hardener and by maintaining concrete surface temperature at least 3 °C above dew point. The working time of a 5 kg mixed mass at 25 °C is typically 30–40 min with cycloaliphatic amine, but increases abruptly when floor temperature falls below 15 °C. Below 15 °C, the cure rate slows, and the resin may remain tacky for more than 24 h, delaying foot traffic and overcoating.
Unlike resins containing butyl glycidyl ether or C12–C14 glycidyl ether, B-17TX does not rely on monofunctional reactive diluents to reach a pumpable viscosity. This is significant because monofunctional diluents reduce crosslink density, lower glass transition temperature, and can increase water uptake. In a comparative cycloaliphatic amine formulation, a reactive diluent-modified resin with 15 wt% butyl glycidyl ether may show a glass transition temperature approximately 20 °C to 30 °C lower than the unmodified B-17TX system. The trade-off is viscosity: diluted systems may be 600–1,200 mPa·s at 25 °C, whereas B-17TX requires heating or larger line diameters. The following table summarizes representative class-level comparisons based on test standards used for liquid epoxy resins; batch-specific values should be taken from the certificate of analysis.
| Property | B-17TX | Reactive diluent-modified DGEBA | Standard general-purpose DGEBA | Test method |
|---|---|---|---|---|
| Viscosity at 25 °C | 9,000–15,000 mPa·s | 600–1,200 mPa·s | 11,000–15,000 mPa·s | ASTM D2196 |
| Epoxide equivalent weight | 184–190 g/eq | 190–220 g/eq | 184–190 g/eq | ISO 3001 |
| Hydrolyzable chloride | <300 ppm | <300 ppm | <500 ppm | ASTM D1726 |
| Glass transition temperature after stoichiometric amine cure | 120–130 °C | 90–100 °C | 110–125 °C | DMA tan delta |
The higher aromatic content of B-17TX, combined with the absence of monofunctional diluents, tends to produce better solvent resistance. In immersion testing using unleaded gasoline or toluene according to ASTM D543, B-17TX-based amine-cured coatings generally exhibit lower mass gain than reactive diluent-modified counterparts, although the magnitude depends on hardener and cure temperature. This difference supports the selection of B-17TX for tank linings and secondary containment where chemical exposure is continuous rather than intermittent.
At relative humidity above 60 %, many amine hardeners react with atmospheric carbon dioxide and moisture to form carbamate or bicarbonate salts on the surface, a condition known as amine blush. In wet-layup and vacuum-infusion work, B-17TX should be used with hardeners selected for low blush potential, and the substrate should be maintained at least 3 °C above dew point. If the resin is heated to 40 °C for vacuum infusion, viscosity can fall to approximately 300–500 mPa·s, but pot life with a standard cycloaliphatic hardener is typically shortened to 30–40 min. Production-scale infusion with 600 g/m² carbon fiber has shown that resin feed pressure should be limited to 0.2 bar to avoid fiber wash; published data for this specific configuration is limited. Interlayer adhesion may fall by 15–20 % when laminates are cured at 70 % RH without surface covering, but this effect depends on hardener and fabric finish. Because B-17TX is unmodified, its high aromatic backbone gives cured laminates a relatively high modulus, and the lack of diluents helps maintain glass transition temperature after post-cure. However, the neat resin viscosity at ambient temperature is too high for direct spray-up without heating; operators should not attempt to use unheated resin in wet layup below 20 °C because the increased viscosity reduces fiber wetting and increases void content.
Storage stability is evaluated by keeping sealed containers below 30 °C. At 25 °C, viscosity drift over 12 months typically remains under 15 % when moisture ingress is prevented. Partially opened containers should be blanketed with dry nitrogen. The resin is not recommended for direct contact with strong Lewis acids, and mixing with amine accelerators above 50 °C can produce an uncontrolled exotherm in large masses. When the resin is used in food-contact coatings, compliance must be verified under the relevant national regulation, such as FDA 21 CFR 175.300 for resinous and polymeric coatings, and extraction limits must be confirmed on the cured coating rather than the liquid resin. Users should also confirm that the specific hardener and cure schedule meet the end-use standard for residual bisphenol A diglycidyl ether migration, such as EU 10/2011 where applicable.
