EPOTUF - Reichhold

1 EPOTUF Epoxy Resins & Curing AgentsAHEW of Curing Agent Blend = Total Weight of Curing Agent Blend Weight A + Weight B AHEWA AHEWBE xample: EPOTUF 37-127 epoxy resin is being used with a curing agent blend consisting of 80 parts EPOTUF 37-601 and 20 parts EPOTUF 37-127 epoxy resin EEW = 200 EPOTUF 37-601 curing agent AHEW = 85 EPOTUF 37-635 curing agent AHEW = 74 AHEW of Curing Agent Blend = 100 = 83 phr = 83 X 100 = 80 + 20 200 85 74 Therefore.

2 Parts of curing agent blend are needed to cure 100 parts of EPOTUF 37-127 epoxy of Epoxy Resin Blend = Total Weight of Epoxy Resin Blend Weight A + Weight B EEWA EEWBE xample:90 parts of EPOTUF 37-140 epoxy resin is being blended with 10 parts of EPOTUF 37-051 reactive diluent to reduce the viscosity. This epoxy resin blend will be reacted with EPOTUF 37-703 curing 37-140 epoxy resin EEW = 185 EPOTUF 37-051 epoxy resin EEW = 675 EPOTUF 37-703 curing agent AHEW = 93 EEW of Epoxy Resin Blend = 100 = 200 phr = 93 X 100 = 47 90 + 10 200 185 675 Therefore, 47 parts of EPOTUF 37-703 curing agent are needed to cure 100 parts of the epoxy resin calculate the stoichiometric use ratio.

3 The following information is needed: Amine Hydrogen Equivalent Weight (AHEW) of curing agent AHEW = Molecular Weight of Amine or 56,100 # of Amine Hydrogens (Amine Value) x (Average # H s per N) Epoxide Equivalent Weight (EEW) of epoxy resin PropertyExcess AmineExcess EpoxyWater ResistanceReducesIncreasesAcid ResistanceReducesIncreasesSolvent ResistanceReducesReducesHeat DistortionReducesReducesAlkali ResistanceNo EffectNo EffectFlexibilityIncreasesReducesCalcula te the AHEW of a blend of curing the EEW of a blend of epoxy = AHEW of Curing Agent X 100 EEW of Epoxy ResinExample.

4 EPOTUF 37-127 epoxy resin EEW = 200 EPOTUF 37-601 curing agent AHEW = 85phr = 85 X 100 = 200 Therefore, parts of EPOTUF 37-601 curing agent are needed to cure 100 parts of EPOTUF 37-127 epoxy resin for a 1:1 stoichiometric MIX RATIOSF ormulating coatings for marine, aerospace, industrial maintenance and flooring applications is a tough job made easier by using raw materials that provide tough performance. Reichhold s EPOTUF resins provide the epoxy coatings formulator with a broad selection of epoxy resins and curing are thermosetting resins that contain an oxirane or epoxide ring and form infusible, insoluble solids when crosslinked with amine or other types of curing agents.

5 Curing agent selection and conditions are key factors which determine the final properties of epoxy systems. Typically curing agents crosslink epoxy resins in one of two ways: by reacting with the epoxide group to become part of the final polymer network or by acting as a catalyst to promote homopolymerization of the YOUR COATINGPERFORMANCE WITH EPOTUF To achieve the optimum performance results from an epoxy / amine curing agent system, it is important to use the resin and curing agent in the appropriate stoichiometric mix ratio where calculations are based on the ratio of the reactive components.

6 After testing the stoichiometric 1:1 ratio it may be necessary to vary the ratio of epoxy to amine depending on the application and desired physical properties. The table below highlights some general trends observed when excess amine or epoxy are EPOXY RESIN & CURING AGENT MIX RATIO Excellent adhesion Low shrinkage Excellent mechanical properties Excellent solvent & chemical resistance Good electrical properties Protective coatings Construction / civil engineering Structural adhesives Composites Electronics / encapsulationPERFORMANCEMAJOR MARKETSC alculate the stoichiometric parts by weight of curing agent per 100 parts of epoxy resin (phr)

7 EPOXY RESINSEPOTUF 37-0512501 100 Aliphatic PolyfunctionalFDA = 675 Adhesives, sealants, laminates, high-solids flexible coatings, filament winding, potting and encapsulationHigh molecular weight aliphatic polyfunctional epoxy resin used as a modifier, improves adhesion, imparts flexibility and toughness, extends pot life, low viscosity EPOTUF 37-058131100 Aliphatic MonofunctionalFDA = 290 Flooring, laminates, tooling, adhesives, water reducible coatings, castings, potting and encapsulationAliphatic monofunctional epoxy diluent based on Alkyl Glycidyl Ether C12-C14, low viscosity, low volatility and toxicity, allows high filler levelsEPOTUF 37-14012,0001100 Liquid Bis-A ResinFDA , , , , = 185 Solvent-borne and high build coatings, high pressure laminating, castings, adhesives, flooring, potting and encapsulationStandard undiluted liquid epoxy resin based on Bisphenol-A (Bis-A)

8 , industry workhorse, good reactivity and resistance properties, high heat distortion temperature EPOTUF 37-1383,6002100 Liquid Bis-F ResinFDA = 170 High solids coatings, fiberglass reinforced plastics, electrical encapsulation and laminates, adhesives, flooring, sealantsUndiluted liquid epoxy resin based on diglycidyl ether of Bisphe-nol-F (Bis-F), used alone or as a modifier for EPOTUF 37-140, improves organic acid and solvent resistance, slows gel and thin film set times, greatly reduced crystallization potential EPOTUF 37-1433,000 MilkyWater78 Liquid Bis-A Resin DispersionEEW = 200 Industrial maintenance coatings, concrete floor coatings, architectural coatings, clear wood coatings, Dispersion of liquid epoxy resin, can formulate compliant two component water-borne epoxy coatings when cured with EPOTUF 37-680 and 37-685.

9 Freeze/thaw stable EPOTUF 38-50511,0003 Xylene75 Type 1 FDA , , , EEW = 500 High performance coatings, structural steel primers, concrete sealers and surfacers, tank linings, container coatings, flooring, marine coatingsSolvent cut solid Bis-A epoxy resin, fast dry, good flexibility and impact resistance, good corrosion and chemical resistanceEPOTUF 38-5019,7003 MIBK / Xylene75 Type 1 EEW = 525 High performance coatings, structural steel primers, concrete sealers and surfacers, tank linings, container coatingsSolvent cut solid Bis-A epoxy resin, high molecular weight, fast dry, excellent toughness and impact resistance, good corrosion and chemical resistanceFDA 38-5318,7003PM Acetate55 Type 6 FDA , , , = 1,825 Solvent cut solid Bis-A epoxy resin, high hydroxyl content, good adhesion, improved toughness and impact resistance, good corrosion and chemical resistanceHigh performance coil, can, powder coatings and drum liningsEPOTUF 37-1004.

10 0003100 Aliphatic PolyfunctionalEEW = 220 Adhesives, grouts, coating applications requiring high solids and/or substantially improved toughness and flexibility100% reactive Bis-A epoxy based resin diluted 20% by weight with EPOTUF 37-051, improves flexibility, extends pot life, good adhesion, medium viscosity FDA 37-1081,4002100 Aliphatic Bis-A / Bis-F BlendEEW = 190 High solids or 100% solids coatings and flooring, water-washable grouts, adhesives, composites100% reactive Bis-A / Bis-F epoxy resin blend diluted 12% by weight with EPOTUF 37-058, provides better thermal and chemical resistance th