Ashland Hetron 922 Corrosion-Resistant Vinyl Ester vs. INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester
Ashland Hetron 922 Corrosion-Resistant Vinyl Ester (INEOS / Hetron US) and INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester (INEOS Composites US) achieve a 92.6% ASTM engineering compatibility score in Marine & Novolac Vinyl Ester Resins. Tensile strength delta is -2 MPa (-2.3%) and thermal HDT delta is -12 °C, making them qualified for direct drop-in substitution under standard cure schedules.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: Ashland Hetron 922 Corrosion-Resistant Vinyl Ester (INEOS / Hetron US) | B: INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester (INEOS Composites US) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | INEOS / Hetron US • HET-922-VE | INEOS Composites US • INE-DRK-441-400-DR | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 86 MPa (12,473 psi) | 88 MPa (12,763 psi) | -2 MPa (-2.3 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 106 °C (223 °F) | 118 °C (244 °F) | -12 °C (Verify Post-Cure) |
| ASTM D790 Flexural Strength (MPa) | 148 MPa | 154 MPa | -6 MPa (-3.9 %) |
| ASTM D2583 Barcol Hardness | 38 | 38 | 0 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 390 cPs | 400 cPs | -10 cPs (-2.5 %) |
| Gel Time @ 25°C (Minutes) | 28 min | 30 min | -2 min |
| ASTM D792 Specific Density (kg/m³) | 1130 kg/m³ | 1140 kg/m³ | -10 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Class 3 Flammable Liquid (UN1866) | Class 3 Flammable Liquid (UN1866) | Identical (UN1866) |
| Unit Price ($/kg USD) & Pack Price | $11/kg • $2,255 (205 kg Drum) | $11.8/kg • $2,419 (205 kg Steel Drum) | -0.8 $/kg (-6.8 %) |
| US Stocking Warehouses | Tampa, FL • Houston, TX • Minneapolis, MN | Dublin, OH • Houston, TX • Jacksonville, FL | 1–3 Days LTL Dispatch |
Both matrices cross-link via free-radical polymerization using 1.25%–2.0% MEKP (Methyl Ethyl Ketone Peroxide, UN3105) or Cumene Hydroperoxide (CHP) with Cobalt Octoate promoter. Low-hydrogen-peroxide MEKP (e.g., Norox MEKP-925H) is recommended to eliminate micro-foaming.
Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 12 °C (106 °C vs. 118 °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.
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Class 3 Flammable Liquid (UN Number: UN1866). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: Ashland Hetron 922 Corrosion-Resistant Vinyl Ester vs. INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester
1. Is Ashland Hetron 922 Corrosion-Resistant Vinyl Ester a direct drop-in equivalent for INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester?▼
Ashland Hetron 922 Corrosion-Resistant Vinyl Ester (INEOS / Hetron US) and INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester (INEOS Composites US) achieve a 92.6% ASTM engineering compatibility score in Marine & Novolac Vinyl Ester Resins. Tensile strength delta is -2 MPa (-2.3%) and thermal HDT delta is -12 °C, making them qualified for direct drop-in substitution under standard cure schedules.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between Ashland Hetron 922 Corrosion-Resistant Vinyl Ester and INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester?▼
Ashland Hetron 922 Corrosion-Resistant Vinyl Ester (INEOS / Hetron US) delivers ASTM D638 Tensile Strength of 86 MPa (12,473 psi) and ASTM D648 HDT of 106 °C, whereas INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester (INEOS Composites US) delivers 88 MPa (12,763 psi) and HDT of 118 °C. The net delta is -2 MPa (-2.3 %) tensile and -12 °C HDT.
3. Do Ashland Hetron 922 Corrosion-Resistant Vinyl Ester and INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester use the same catalyst or hardener cure system?▼
Both matrices cross-link via free-radical polymerization using 1.25%–2.0% MEKP (Methyl Ethyl Ketone Peroxide, UN3105) or Cumene Hydroperoxide (CHP) with Cobalt Octoate promoter. Low-hydrogen-peroxide MEKP (e.g., Norox MEKP-925H) is recommended to eliminate micro-foaming. Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 12 °C (106 °C vs. 118 °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 Ashland Hetron 922 Corrosion-Resistant Vinyl Ester and INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester?▼
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Class 3 Flammable Liquid (UN Number: UN1866). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105). In US B2B distribution, Ashland Hetron 922 Corrosion-Resistant Vinyl Ester is priced at $2,255 per 205 kg Drum ($11/kg) vs. $2,419 per 205 kg Steel Drum ($11.8/kg) for INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester (delta: -0.8 USD/kg).
Related Drop-In Comparisons in Marine & Novolac Vinyl Ester Resins
Ashland Hetron 922 Corrosion-Resistant Vinyl Ester (INEOS / Hetron US) and INEOS Derakane 441-400 Low-Styrene Structural Vinyl Ester (INEOS Composites US) 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).