Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy vs. INEOS Derakane Signia 470-300 Novolac Vinyl Ester
Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy (Huntsman Advanced Materials) and INEOS Derakane Signia 470-300 Novolac Vinyl Ester (INEOS Composites) achieve a 81.3% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +6 MPa (+7%) and thermal HDT delta is +45 °C, making them interchangeable with post-cure temperature and viscosity flow adjustments.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy (Huntsman Advanced Materials) | B: INEOS Derakane Signia 470-300 Novolac Vinyl Ester (INEOS Composites) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | Huntsman Advanced Materials • HUN-MY721-50KG | INEOS Composites • INE-DRK470-55DR | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 92 MPa (13,343 psi) | 86 MPa (12,473 psi) | +6 MPa (+7 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 195 °C (383 °F) | 150 °C (302 °F) | +45 °C (Verify Post-Cure) |
| ASTM D790 Flexural Strength (MPa) | 136 MPa | 152 MPa | -16 MPa (-10.5 %) |
| ASTM D2583 Barcol Hardness | 42 | 42 | 0 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 4500 cPs | 300 cPs | +4200 cPs (+1400 %) |
| Gel Time @ 25°C (Minutes) | 52 min | 30 min | +22 min |
| ASTM D792 Specific Density (kg/m³) | 1145 kg/m³ | 1135 kg/m³ | +10 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Class 9 Environmentally Hazardous (UN3082) | Class 3 Flammable Liquid (UN1866) | UN3082 vs. UN1866 |
| Unit Price ($/kg USD) & Pack Price | $34/kg • $6,800 (200 kg Drum Kit) | $9.2/kg • $1,885 (205 kg (55 Gal Drum)) | +24.8 $/kg (+269.6 %) |
| US Stocking Warehouses | Bay City, MI • Tampa, FL • Seattle, WA | Houston, TX • Lakeland, FL • Rock Hill, SC | 1–3 Days LTL Dispatch |
Both systems utilize stoichiometric Amine / Polyetheramine Hardeners. Verify exact mix ratio by weight (pbw) on the batch TDS before metering—never substitute hardeners across manufacturers without DSC glass-transition (Tg) qualification.
Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 45 °C (195 °C vs. 150 °C). For elevated-temperature tooling or dark-colored marine hulls, perform a 4–6 hour post-cure ramp at 60–80 °C (140–176 °F) to lock in full cross-link density.
Divergent Hazmat Profiles: Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy is classified as Class 9 Environmentally Hazardous (UN3082), whereas INEOS Derakane Signia 470-300 Novolac Vinyl Ester is classified as Class 3 Flammable Liquid (UN1866). Consolidate LTL freight accordingly.
Engineering FAQ: Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy vs. INEOS Derakane Signia 470-300 Novolac Vinyl Ester
1. Is Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy a direct drop-in equivalent for INEOS Derakane Signia 470-300 Novolac Vinyl Ester?▼
Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy (Huntsman Advanced Materials) and INEOS Derakane Signia 470-300 Novolac Vinyl Ester (INEOS Composites) achieve a 81.3% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +6 MPa (+7%) and thermal HDT delta is +45 °C, making them interchangeable with post-cure temperature and viscosity flow adjustments.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy and INEOS Derakane Signia 470-300 Novolac Vinyl Ester?▼
Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy (Huntsman Advanced Materials) delivers ASTM D638 Tensile Strength of 92 MPa (13,343 psi) and ASTM D648 HDT of 195 °C, whereas INEOS Derakane Signia 470-300 Novolac Vinyl Ester (INEOS Composites) delivers 86 MPa (12,473 psi) and HDT of 150 °C. The net delta is +6 MPa (+7 %) tensile and +45 °C HDT.
3. Do Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy and INEOS Derakane Signia 470-300 Novolac Vinyl Ester use the same catalyst or hardener cure system?▼
Both systems utilize stoichiometric Amine / Polyetheramine Hardeners. Verify exact mix ratio by weight (pbw) on the batch TDS before metering—never substitute hardeners across manufacturers without DSC glass-transition (Tg) qualification. Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 45 °C (195 °C vs. 150 °C). For elevated-temperature tooling or dark-colored marine hulls, perform a 4–6 hour post-cure ramp at 60–80 °C (140–176 °F) to lock in full cross-link density.
4. How do US DOT 49 CFR Hazmat shipping rules and B2B drum/pack prices compare between Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy and INEOS Derakane Signia 470-300 Novolac Vinyl Ester?▼
Divergent Hazmat Profiles: Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy is classified as Class 9 Environmentally Hazardous (UN3082), whereas INEOS Derakane Signia 470-300 Novolac Vinyl Ester is classified as Class 3 Flammable Liquid (UN1866). Consolidate LTL freight accordingly. In US B2B distribution, Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy is priced at $6,800 per 200 kg Drum Kit ($34/kg) vs. $1,885 per 205 kg (55 Gal Drum) ($9.2/kg) for INEOS Derakane Signia 470-300 Novolac Vinyl Ester (delta: +24.8 USD/kg).
Related Drop-In Comparisons in Structural Infusion & Laminating Epoxy Systems
Huntsman Araldite MY 721 Tetrafunctional Aerospace Epoxy (Huntsman Advanced Materials) and INEOS Derakane Signia 470-300 Novolac Vinyl Ester (INEOS Composites) are trademarks of their respective owners. CompositeMatrix Technologies Inc. is an independent North American B2B composite material intelligence registry; comparative ASTM D638, D648, D790, D2583, and D2196 figures are presented under the US legal doctrine of Nominative Fair Use (Lanham Act, 15 U.S.C. § 1125) and Feist Publications, Inc. v. Rural Telephone Service Co. (499 U.S. 340) for scientific and industrial cross-reference. Cure schedules, exotherm behavior, and laminate qualification must be verified by a licensed Naval Architect or Professional Engineer (PE) against current manufacturer batch Technical Data Sheets (TDS) and Safety Data Sheets (SDS).