MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters
Essential chemical initiators, organic peroxides, and stoichiometric amine hardeners required to cross-link Vinyl Ester, Polyester, and Epoxy resin matrices. Cure & Process Rule: HAZMAT SEGREGATION RULE: Organic Peroxides (Class 5.2 UN3105) must be shipped and stored in isolated cabinets away from Cobalt/Amine promoters to prevent self-accelerating decomposition.
1. Indexed ASTM Materials in MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters (15 SKUs)
| Material & OEM Brand | SKU | ASTM D638 Tensile | ASTM D648 HDT | ASTM D790 Flex | Viscosity / Density | US DOT 49 CFR | US Pack Price | Compare / Specs |
|---|---|---|---|---|---|---|---|---|
| Araldite® LY 1564 / Aradur® 22962Huntsman Advanced • Epoxy System | HNT-LY1564-DRUM | 88.9 MPa 12,900 psi | 120 °C | 128.9 MPa | 220 cPs | Non-Reg US DOT Class 8 / 9 (Corrosive Polyamine Hardener) | $2,340 Drum + Hardener Kit | Datasheet → |
| Arkema Luperox DDM-9 Marine Grade MEKP InitiatorArkema Inc. • MEKP Peroxide Initiator | ARK-LUPDDM9 | — | — | — | 18 cPs | UN3105 Class 5.2 Organic Peroxide Type D | $229 4 x 3.6 kg Hazmat Case | Datasheet → |
| NouryonButanox LPT-IN Long Gel-Time Infusion PeroxideNouryon (AkzoNobel) • Infusion Peroxide Initiator | NRY-BUTLPTIN | — | — | — | 17 cPs | UN3105 Class 5.2 Organic Peroxide Type D | $279 4 x 3.6 kg Hazmat Case | Datasheet → |
| Nouryon Butanox M-50 Methyl Ethyl Ketone PeroxideNouryon (AkzoNobel) • MEKP Peroxide Initiator | NRY-BUTM50-CASE | — | — | — | 20 cPs | UN3105 Class 5.2 Organic Peroxide Type D | $225 4 x 3.6 kg Hazmat Case | Datasheet → |
| Nouryon Trigonox 239 Non-Foaming Cumyl PeroxideNouryon (AkzoNobel) • Cumyl Hydroperoxide Initiator | NRY-TRIG239 | — | — | — | 28 cPs | UN3109 Class 5.2 Organic Peroxide Type F | $295 4 x 3.6 kg Hazmat Case | Datasheet → |
| OMG 6% Cobalt Naphthenate Cure Promoter SolutionBorchers / OMG Americas • Cobalt Cure Accelerator | OMG-COBALT6-5G | — | — | — | 45 cPs | UN1993 Class 3 Flammable Liquid | $353 4 x 3.6 kg Hazmat Case | Datasheet → |
| PRO-SET INF-210 Fast Cure Infusion Epoxy HardenerGougeon Brothers (PRO-SET) • Cycloaliphatic Amine Hardener | PRO-INF210-15G | — | — | — | 32 cPs | UN2735 Class 8 Corrosive Polyamine | $276 4 x 3.6 kg Hazmat Case | Datasheet → |
| PRO-SET INF-211 Medium Infusion Epoxy HardenerGougeon Brothers (PRO-SET) • Cycloaliphatic Amine Hardener | PRO-INF211-15GAL | 79 MPa 11,458 psi | 91 °C | 126 MPa | 35 cPs | UN2735 Class 8 Corrosive Polyamine | $998 52 kg Drum (15 Gal) | Datasheet → |
| PRO-SET INF-212 Slow Tropical Infusion Epoxy HardenerGougeon Brothers (PRO-SET) • Cycloaliphatic Amine Hardener | PRO-INF212-15G | — | — | — | 38 cPs | UN2735 Class 8 Corrosive Polyamine | $282 4 x 3.6 kg Hazmat Case | Datasheet → |
| PRO-SET INF-213 Extra-Slow Thick-Section Epoxy HardenerGougeon Brothers (PRO-SET) • Cycloaliphatic Amine Hardener | PRO-INF213-15G | — | — | — | 42 cPs | UN2735 Class 8 Corrosive Polyamine | $289 4 x 3.6 kg Hazmat Case | Datasheet → |
| United Initiators Benox B-50 Dibenzoyl Peroxide PasteUnited Initiators • BPO Peroxide Initiator | UIN-BENOXB50 | — | — | — | 8500 cPs | UN3108 Class 5.2 Organic Peroxide Type E | $252 4 x 3.6 kg Hazmat Case | Datasheet → |
| United Initiators Norox MCP-75 Cumyl Hydroperoxide BlendUnited Initiators • Low-Exotherm Peroxide Initiator | UIN-MCP75-CASE | — | — | — | 22 cPs | UN3105 Class 5.2 Organic Peroxide Type D | $262 4 x 3.6 kg Hazmat Case | Datasheet → |
| United Initiators Norox MEKP-925H Low-H2O2 CatalystUnited Initiators • Organic Peroxide Initiator | UI-NRX925H-4X8LB | — | — | — | 22 cPs | UN3105 Class 5.2 Organic Peroxide | $182 4 x 8 lb Case (14.5 kg) | Datasheet → |
| United Initiators Norox MEKP-9 Industry Standard PeroxideUnited Initiators • MEKP Peroxide Initiator | UIN-MEKP9-CASE | — | — | — | 19 cPs | UN3105 Class 5.2 Organic Peroxide Type D | $213 4 x 3.6 kg Hazmat Case | Datasheet → |
| WEST SYSTEM 206-B Slow Marine Epoxy HardenerGougeon Brothers (WEST SYSTEM) • Polyamine Epoxy Hardener | WST-206B-1GAL | — | — | — | 120 cPs | UN2735 Class 8 Corrosive Polyamine | $302 4 x 3.6 kg Hazmat Case | Datasheet → |
2. Drop-In Equivalence Matrix & Head-to-Head ASTM Comparisons
Standard MEKP group: United Initiators Norox MEKP-925H (Low-Hydrogen Peroxide for Vinyl Ester) ↔ Nouryon Cadox L-50a ↔ Arkema Luperox DDM-9. Low-exotherm group: Norox CHP (Cumene Hydroperoxide).
Direct Head-to-Head Engineering Comparisons in MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters (Click any pair for full Δ ASTM & Cure Analysis):
3. Mandatory Companion Materials, Cure Ratios & Hazmat Segregation
HAZMAT SEGREGATION RULE: Organic Peroxides (Class 5.2 UN3105) must be shipped and stored in isolated cabinets away from Cobalt/Amine promoters to prevent self-accelerating decomposition.
Required Companion Material Groups for MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters:
- Marine & Novolac Vinyl Ester Resins
- Isophthalic & DCPD Marine Polyester Resins
- Structural Infusion & Laminating Epoxy Systems
- Marine ISO/NPG Gelcoats
Category Profile: DOT Class 5.2 Organic Peroxide (UN3105) / Class 8 Corrosive Amine (UN2735). Under federal hazmat regulations, Class 3 Flammable Liquids (UN1866 Resin) and Class 5.2 Organic Peroxides (UN3105 MEKP Initiator) must be packaged in separate UN-certified outer drums/boxes and segregated from Cobalt Octoate promoters to prevent exothermic thermal runaway.
Recommended Companion SKUs in Stock (Add to Kit BOM):
4. Qualified Process Methods, Finished Parts & ASTM Standards
Qualified Molding & Layup Methods
- Metered Catalyst Dispenser
- Chopper Gun Internal/External Mix
- Vacuum Infusion Degassed Batch Mixing
Finished Marine, Aerospace & Industrial Structures
- Cross-Linked Vinyl Ester & Polyester Hull Laminates
- Blister-Free Marine Gelcoat Barrier Coats
- Post-Cured Aerospace & Wind Epoxy Structures
Governing ASTM / ISO Test Standards
- Active Oxygen Assay (8.8% – 9.2% AO)
- ASTM D2196 Viscosity
- Amine Value (mg KOH/g)
Engineering FAQ: MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters (ASTM & Cure Specification)
1. What are the ASTM mechanical (D638 Tensile) and thermal (D648 HDT) ranges for MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters?▼
Across the 15 verified North American SKUs in MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters (CAT-CHEM-CAT), ASTM D638 tensile strength spans 79–88.9 MPa and ASTM D648 heat deflection temperature (HDT) spans 91–120 °C. Primary reference standards include Active Oxygen Assay (8.8% – 9.2% AO), ASTM D2196 Viscosity, Amine Value (mg KOH/g).
2. What companion catalyst, hardener, or cure system is required for MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters?▼
HAZMAT SEGREGATION RULE: Organic Peroxides (Class 5.2 UN3105) must be shipped and stored in isolated cabinets away from Cobalt/Amine promoters to prevent self-accelerating decomposition. Required companion categories include: Marine & Novolac Vinyl Ester Resins; Isophthalic & DCPD Marine Polyester Resins; Structural Infusion & Laminating Epoxy Systems; Marine ISO/NPG Gelcoats.
3. What are the approved cross-brand drop-in equivalents in MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters?▼
Standard MEKP group: United Initiators Norox MEKP-925H (Low-Hydrogen Peroxide for Vinyl Ester) ↔ Nouryon Cadox L-50a ↔ Arkema Luperox DDM-9. Low-exotherm group: Norox CHP (Cumene Hydroperoxide). Top stocked manufacturers in the US registry include Huntsman Advanced, Arkema Inc., Nouryon (AkzoNobel), Borchers / OMG Americas, Gougeon Brothers (PRO-SET), United Initiators, Gougeon Brothers (WEST SYSTEM).
4. What is the US DOT 49 CFR and Transport Canada TDG Hazmat shipping classification for MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters?▼
Materials in MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters are regulated under DOT Class 5.2 Organic Peroxide (UN3105) / Class 8 Corrosive Amine (UN2735). When ordering Class 3 Flammable Liquid resins (UN1866) alongside Class 5.2 Organic Peroxide initiators (MEKP UN3105), shipments must comply with US DOT 49 CFR § 177.848 hazmat segregation and isolated packaging rules.
5. Which composite fabrication methods and finished structures use MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters?▼
MEKP Peroxide Initiators, Amine Hardeners & Cure Promoters is qualified for Metered Catalyst Dispenser, Chopper Gun Internal/External Mix, Vacuum Infusion Degassed Batch Mixing. Typical finished B2B applications include Cross-Linked Vinyl Ester & Polyester Hull Laminates, Blister-Free Marine Gelcoat Barrier Coats, Post-Cured Aerospace & Wind Epoxy Structures.