Epoxy Curing Agents for Civil Structural Reinforcement Ecure & Ecflex Series
Product Summary
Shanghai Feimi Material Technology specializes in R&D and supply of high-performance epoxy hardeners for civil structural reinforcement (Ecure-05/08/28/47, Ecflex-10). The series covers ambient fast cure, sub-zero low-temperature cure, 1:1 mix ratio formulation, and low-exotherm large-volume grouting systems. Ecflex-10 provides exceptional flexibility and thermal shock resistance. Featuring high bond strength, acid/alkali resistance, damp-heat aging resistance, and zero-VOC eco-friendly properties, these products are widely used in chemical rebar anchoring, epoxy crack injection, epoxy repair mortar, and carbon fiber (CFRP) structural reinforcement. Custom formulation services provided.
Products overview
The Ecure series and Ecflex-10 epoxy curing agent matrix, independently developed by Shanghai Feimi Material Technology, are high-performance modified amine curing systems engineered specifically for demanding civil structural reinforcement, concrete chemical rebar anchoring, deep crack injection, leveling epoxy mortar, and carbon fiber-reinforced polymer (CFRP) fabric/laminate bonding applications.
On modern construction and structural repair sites, working conditions can be extremely complex: emergency repairs require rapid room-temperature strength development; winter conditions demand high-efficiency crosslinking at sub-zero temperatures; mass continuous casting or deep crack injection calls for low exotherm to prevent thermal cracking; and environments subject to high-frequency vibrations and severe thermal cycling require the epoxy layer to possess outstanding flexibility and peel resistance.
To meet these challenges, Feimi Material offers a comprehensive cure solution portfolio:
Ambient Fast Cure: Ecure-05 / Ecure-47
Sub-Zero Low-Temp Cure: Ecure-28
Mass/Volume Low Exotherm: Ecure-08
High-Flexibility & Impact Resistance: Ecflex-10
The entire product lineup exhibits exceptionally high tensile and shear strengths, forming robust chemical bonds with concrete, rebar, steel, ceramics, and cementitious substrates. Compliant with strict national environmental standards, these hardeners deliver superior resistance to water, acids, alkalis, damp-heat aging, and fatigue. Featuring excellent resin compatibility and wet-out properties, they blend seamlessly with Bisphenol A, Bisphenol F, and various modified epoxy resins, enabling precise 1:1 (by volume or weight) formulation of two-component high-strength structural adhesives.
Products Advantages
- All-Scenario Versatility for Complex Engineering Conditions.From -15°C low-temperature fast curing to room-temperature low-exotherm mass grouting, our complete product matrix meets all-weather construction requirements—from winter chemical anchoring to large-scale concrete crack repairs.
- High-Density Chemical Bonding & Superior Anchoring Force.Formulated to build a dense crosslinked polymer network upon curing. Delivers exceptional tensile and shear strength with strong chemical adhesion to concrete, deformed rebar, metals, and cementitious substrates, fully meeting Grade-1 structural adhesive standards.
- High Flexibility & Outstanding Resistance to Thermal Shock & Cracking.The specially formulated Ecflex-10 flexible hardener absorbs internal mechanical stresses, effectively solving the cracking and debonding issues caused by thermal expansion/contraction during severe temperature cycling (-40°C to 120°C) or high-frequency dynamic loads.
- Superior Chemical Corrosion & Damp-Heat Aging Resistance.Proven through accelerated aging tests with zero blistering, delamination, or cracking. Offers outstanding resistance to water immersion, acids, alkalis, salt spray, and hydrolysis, ensuring decades of structural integrity and safety.
- Eco-Friendly & Safe for Confined Space Application.Strictly controls free amine content and hazardous substances. Free formaldehyde, benzene series, and heavy metal concentrations strictly comply with rigorous international and national standards. Non-toxic with low odor, ensuring applicator safety in elevated or enclosed workspaces.
Low-Temperature Curing Series (Ecure-05, Ecure-28, Ecure-47) Typical Properties
| 项目 / Parameter | Ecure-05 | Ecure-28 | Ecure-47 |
|---|
| 外观 Appearance | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid |
| 色泽(Gardner) Color | <11 | <11 | <11 |
| 粘度(25℃,mPa.s) viscosity | ~600 | ~9000 | ~3000 |
| 活泼氢当量(g/mol) AHEW | 108 | 87 | 185 |
| 适合使用量(NPEL-128:Ecflex) Recommended Use Level | 100:55 | 100:45 | 100:100 |
| Gel time(25℃ min) 10g | 7 | 4 | 7 |
| 特点 | Rapid curing at room temperature, high glass transition temperature, low viscosity, and low odor | Curing rapidly at low temperatures with a high glass transition temperature | Rapid curing at low temperatures, low odor, can be made into a 1:1 ratio |
Room-Temperature Low-Exotherm Curing Series (Ecure-08) Typical Properties
| Products | Ecure-08 | Ecure-27 |
|---|
| 外观 Appearance | 琥珀色 Amber liquid | 琥珀色或棕红色液体 Amber liquid or Brownish-red |
| 颜色 Gardner | <12 | <12 |
| 粘度 Viscosity (25℃, mPa.s) | ~450 | ~100 |
| 活泼氢当量 AHEW (g/mol) | 110 | 44 |
| 适合使用量 (NPEL-128:固化剂) Recommended Use Level | 100:55 | 100:23 |
| 凝胶时间 Gel Time (min 25℃) | 35 | >360 |
| 玻璃化转变温度 Tg (℃) (NPEL-128) | 58 | ~160 |
| 特性 Characteristics | Room-temperature curing; excellent resistance to acids and chemical corrosion | High-temperature curing, excellent chemical resistance, and an exceptionally long working time |
High-Flexibility Modified Amine Series (Ecflex-10) Physical & Mechanical Properties
| 项目 / Parameter | Ecflex-01 | Ecflex-02 | Ecflex-03 | Ecflex-05 | Ecflex-07 | Ecflex-10 |
|---|
| 外观 Appearance | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid | 琥珀色液体 Amber liquid |
| 色泽 Color (Gardner) | <=12 | <=12 | <=12 | <=12 | <=12 | <=12 |
| 粘度 viscosity (25℃,mPa.s) | 17000 | 25000 | 9000 | 10700 | 4500 | 1900 |
| 活泼氢当量 AHEW (g/mol) | 390 | 390 | 185 | 185 | 251 | 170 |
| 推荐使用量(NPEL-128:Ecflex) Recommended Use Level | 100:200 | 100:200 | 100:100 | 100:100 | 100:130 | 100:90 |
| Gel time (25℃ min) | 35 | 50 | 40 | 15 | 70 | 55 |
Mechanical Properties
| 产品 / Product | 拉伸强度 MPa Tensile strength | 拉伸模量 MPa Tensile Modulus | 拉伸延伸率 % Elongation | 拉伸韧性 J/cm²[1] Tensile toughness |
|---|
| 400#聚酰胺 Versamid 140 | 44 | 2800 | 5.1 | 13 |
| Ecflex-01 | 10 | 10 | 280 | 36 |
| Ecflex-02 | 10.3 | 25 | 225 | 48 |
| Ecflex-03 | 44 | 1957 | 25 | 187 |
| Ecflex-05 | 37 | 1932 | 15 | 191 |
| Ecflex-07 | 18 | 392 | 120 | 190 |
| Ecflex-10 | 40 | 1800 | 28 | 183 |
3. Adhesion Performance
| 测试项目 / Test Item | Ecflex-01 | Ecflex-02 | Ecflex-03 | Ecflex-05 | Ecflex-07 | Ecflex-10 | 聚酰胺 Versamid 140 |
|---|
| 搭接剪切 LSS（Fe/Fe）MPa | 11 | 17 | 27 | 24 | 18 | 23.6 | 18 |
| 搭接剪切 LSS（Al/Al）MPa | 8.1 | 12.9 | 18 | 17 | 8.93 | 18.9 | 12.7 |
| 老化后搭接剪切 LSS（Al/Al）MPa [2] | | 15.6 | 26 | | 8.77 | 19.6 | failed |
| 搭接剪切 LSS（ABS/ABS）MPa | 4.5 | 4.6 | 4.3 | 4.5 | 4.3 | 4.2 | |
| 搭接剪切 LSS（ABS/ABS不打磨 no sanded）MPa | 4.4 | 4.6 | 4.5 | 4.5 | 4.4 | 4.5 | |
| 搭接剪切 LSS（PC/PC）MPa | 6.9 | 6.9 | 7 | 6.9 | 6.3 | 6.3 | |
| 搭接剪切 LSS（PC/PC不打磨 no sanded）MPa | 6.6 | 6.6 | 6.5 | 6.4 | 6.1 | 6.1 | |
注 [2]： 85℃ 85% immerse aging for 1000h。
Target Applications
- Chemical Rebar Anchoring Epoxy (Post-Installed Rebar & Anchor Bolts)。Formulated as the core hardener for epoxy anchoring adhesives. Used to post-install rebar and threaded rods into hardened concrete, providing high pull-out resistance and load-bearing capacity.
- Epoxy Crack Injection & Structural Grouting System。Used in low-viscosity epoxy grouting liquids for repairing deep cracks, voids, and honeycomb structures in concrete elements. Excellent flowability and penetrability restore structural integrity.
- High-Strength Epoxy Repair Mortar。Blended with graded quartz aggregates for filling deep voids, repairing spalled concrete surfaces, and floor leveling, significantly boosting mechanical impact resistance and wear strength.
- CFRP Bonding Epoxy Adhesives (Impregnating & Surface Leveling Resins)。Formulated into carbon fiber saturants and leveling adhesives for bonding CFRP sheets or laminates onto concrete beams, columns, and slabs for flexural and shear capacity upgrading.
Shelf Life:
- Minimum 12 months from the manufacturing date when stored in unopened original containers.
Storage Requirements:
- Keep tightly sealed in a cool, dry, and dark environment (shaded from direct sunlight). Prevent exposure to moisture, ambient air, and direct contact with water.
FAQ
- Q1: What are the technical advantages of using Ecure-47 to formulate 1:1 (v/v or w/w) two-component chemical anchoring adhesives?
A: Ecure-47 is chemically modified at the molecular level to adjust both its reactivity and viscosity. This allows formulators to achieve a precise 1:1 volume or weight ratio with standard liquid epoxy resins (e.g., NPEL-128) without compromising cure speed or mechanical strength. A 1:1 ratio significantly simplifies field application via dual-cartridge caulking guns or automated meter-mix dispensing systems, eliminating incomplete curing or reduced bond strength caused by field-mixing ratio errors.
- Q2: Why is Ecure-08 specifically recommended for large-area epoxy mortar screeds and deep-section structural grouting?
A: When casting thick sections or mass grouting deep concrete cracks, standard fast-curing hardeners generate intense peak exotherms (thermal runaway), causing significant internal thermal stress, air entrapment, cracking, or substrate thermal shock. Ecure-08 features an extended pot life and a mild, controlled exotherm curve. This effectively dissipates internal stress and ensures a dense, bubble-free, structurally sound polymer matrix across deep grouts and large-area floor overlays.
- Q3: How does the flexible hardener Ecflex-10 enhance the performance of CFRP structural bonding and rebar anchoring systems?
A: Rigid epoxy adhesives can embrittle and debond under dynamic structural loads (such as bridge vibrations or wind loads) and severe thermal expansion cycles. Ecflex-10 imparts superior toughness, ductility, and elongation at break to the cured matrix. This enables the bonded structural joints to withstand severe thermal shocks (-40°C to 120°C) without micro-cracking or bond failure, markedly extending the fatigue life and seismic reliability of reinforced structures.
