L DOW IQUID EPOXY RESINS - Science | Engineering

1 DOWLIQUIDEPOXYRESINSDOWLIQUIDEPOXYRESINS C ontentsContentsIntroduction ..2 Products and Properties ..3 Resin Structure ..5 Curing Agents ..6 Primary and Secondary Polyfunctional Amines ..6 Aliphatic Polyamines ..7 Aromatic Polyamines ..7 Calculation of Stoichiometric Ratios ..7 Anhydrides ..9 Polyamides ..10 Catalytic Curing Agents ..11 Reactive Diluents, Modifiers, Fillers ..12 Reactive Diluents ..12 Resin Modifiers ..13 Fillers ..14 EPOXY Formulating Techniques ..15 Equipment ..15 Temperature Control ..15 Viscosity vs Temperature of EPOXY RESINS .

2 15 Resin Performance Data ..16 Test Methods ..17 Chemical and Solvent Resistance ..17 Cure Schedules ..18 Liquid EPOXY RESINS Cured with * 24 Physical Properties ..19 Electrical Properties ..20 Chemical, Solvent Resistance, andThermal Degradation ..21 Liquid EPOXY RESINS Cured with 1,2-Cyclohexane DiaminePhysical Properties ..22 Electrical Properties ..22 Chemical, Solvent Resistance, and Thermal Degradation ..23 Liquid EPOXY RESINS Cured with NadicMethyl AnhydridePhysical Properties ..24 Electrical Properties ..25 Chemical, Solvent Resistance, and Thermal Degradation.

3 26 Liquid EPOXY RESINS Cured with BF3 MEAP hysical Properties ..27 Electrical Properties ..28 Chemical, Solvent Resistance, and Thermal Degradation ..29 Liquid EPOXY RESINS Cured with Polyamide Curing AgentPhysical Properties ..30 Electrical Properties ..31 Chemical, Solvent Resistance, and Thermal Degradation ..32 Liquid EPOXY RESINS Containing a Reactive DiluentPhysical Properties ..32 Electrical Properties ..33 Chemical, Solvent Resistance, and Thermal Degradation ..33 Additional Property Data ..34 Storage ..35 Hazards And Handling Precautions.

4 36 Health Hazards ..36 Handling Precautions ..38 Flammability ..39 Spill Containment and Cleanup ..39 Appendix Abbreviations ..40 Product Stewardship ..41 DOWLIQUIDEPOXYRESINSDOWLIQUIDEPOXYRESINS Note: Safety information on the handlingof novolac RESINS , EPOXY RESINS , solvents,diluents, modifiers, and other common EPOXY formulation materials is , plant conditions and environ-ments vary so widely, no warranty of anykind can be given. Formulators-customersshould contact their suppliers of each ofthese materials for specific safe handlingrecommendations.

5 Companion bulletins,DOW EPOXY RESINS Product Stewardship,Safe Handling and Storage Manual(Form No. 296-00312) and DOW EpoxyCuring Agents Product Stewardship, Safe Handling and Storage Manual (Form No. 296-01331), are available from theDow Plastics (Thermoset Applications)Department or your Dow sales representative. 1966, 1969, 1976, 1988, 1990, 1998, 1999 The Dow Chemical CompanyAll rights * liquid EPOXY RESINS , developedand marketed by The Dow ChemicalCompany, are commercially establishedas major raw materials in the fields oftooling, encapsulation, adhesives, lami-nates, and commercial success has beenearned by the families of solidand solution EPOXY RESINS , flexibleepoxy RESINS , brominated EPOXY RESINS , * EPOXY novolac RESINS , * EPOXY curing agents.

6 Alsoproduced and marketed by Dow. And since these products are used withvarious curing agents, diluents, andmodifiers, an almost unlimited range andvariety of properties may be bulletin describes the bisphenol A-based liquid EPOXY RESINS and aliphaticglycol EPOXY RESINS offered by on other DOW EPOXY andepoxy-related products may beobtained from your Dow sales repre-sentative or by calling curing of a liquid EPOXY resin , converting it to a thermoset solid is fundamental to its commercialuse. This is also true of EPOXY , poly-ester, phenolic, and melamine , liquid EPOXY RESINS , becauseof their structure and the method oftheir cure, are superior to these otherresins in the following properties: No volatile lossduring cure of product.

7 Dimensional stability exhibit little shrinkageand can be used for ver y accurate reproduction. Chemical resistance. Good resistance to a variety of chemicals(including solvents, acids, and bases)results with properly cured formulations. Chemical inertness. They accept awide range of fillers and pigments;they do not affect encapsulated partsor common containers. Durability. Cured formulationsexhibit good hardness, impactstrength, and toughness. Adhesion. The tenacity of epoxyadhesion to almost any surface is without equal among organic coatings.

8 Versatility in curing agent choiceand curing , bisphenol A/epichlorohydrinbased RESINS , novolac based epoxyresins, and other di- or multifunctionalresins containing the aromatic ringstructure will cure to hard, rigid com-positions having rather low impact andelongation characteristics. There aremany approaches to improving theseproperties and increasing flexibility inepoxy resin systems. Among them aremodifications with vegetable oils,polyamide or polysulfide curing agents,or long chain polyglycols. However,such modifiers often adversely affectthe physical, chemical, or solvent resis-tance properties of an EPOXY system, orthey limit the choice of curing agentsand thus limit use in many 732 and 736 flexibleepoxy RESINS are designed to overcomemany of the specific disadvantages ofthese other flexibilizing systems.

9 Theyare compatible with practically all otherepoxy RESINS and are shelf stable aftermixing. Because they are true epoxyresins, they react with all EPOXY curingagents and become an integral part ofthe cured 1 on page 4 lists the typical properties of DOW liquid EPOXY RESINS ;Table 2 lists the typical properties of two liquid EPOXY RESINS that contain a reactive diluent (a C12-C14aliphatic glycidyl ether), which provides reducedviscosities. Each resin is brieflydescribed in the following 3 lists the typical properties oftwo flexible EPOXY : Prior to handling any of these RESINS ,or related curing agents, diluents, catalysts,or solvents, be certain you have acquiredfrom your supplier(s) adequate information pertaining to safe operations for your workersand your plant.

10 Request Material Safety Data(MSD) sheets for each product from its supplier. See Hazards section, pages 39-42,and the bulletins mentioned in the note onthe inside of the front *Trademark of The Dow Chemical 317 EPOXY ResinA high viscosity, fast reacting (20% fasterthan 331) liquid EPOXY resindesigned for adhesive applicationsrequiring quick gelling with amine cur-ing 324 EPOXY ResinA formulated blend of 331 and aC12-C14aliphatic glycidyl ether to producea low viscosity product. The product hasutility in filled formulations for flooringcompounds, grouts, adhesives,decoupage coatings, and high solidscoatings.