Adhesion epoxy resin

Epoxy resins find a large number of uses because of their remarkable chemical resistance and good adhesion. Epoxy resins are excellent structural adhesives. When properly cured, epoxy resins can yield very tough materials. They are used in industrial floorings, foams, potting materials for electrical insulations, etc. One of the principal constituents in many of the Fibre-reinforced plastics (FRP) is an epoxy polymer. 

Some specs under which these structural adhe-sivesmay be procured are MIL-A-5090B, "Adhesive Airframe, Metal to Metal MIL-A-8431, "Adhesive, Heat Resistant, Airframe Structural, Metal to Metal MIL-A-8623A, Adhesive, Epoxy Resin, Metal to Metal Structural Bonding and MIL-A-14042, "Adhesive, Epoxy ... 

As with amidoamine and polyamide cured adhesives, epoxy resins cured with aliphatic amines exhibit tensile shear strength that is dependent on the type of filler and concentration. Table 11.10 shows the effect of filler loading on strength of a simple general-purpose, room temperature curing epoxy adhesive composed of liquid DGEBA epoxy mixed with 10 pph of a tertiary amine. 

Typically tape or film epoxy adhesives are modified with synthetic thermoplastic polymers to improve flexibility in the uncured film and toughness in the cured adhesive. Epoxy resins can also be blended with phenolic resins for higher heat resistance. The most common hybrid systems include epoxy-phenolics, epoxy-nylon, epoxy-nitrile, and epoxy-vinyl hybrids. These hybrid film adhesives are summarized in Table 13.2, and structural properties are shown in Table 13.3. 

TRADE NAMES AND MANUFACTURERS EPOXY ADHESIVES, EPOXY RESINS, CURING AGENTS AND CATALYSTS, ADDITIVES AND MODIFIERS... 

Adhesive, Epoxy Resin, Metal to Metal Structural Bonding Strong Linoleum Cement Adhesive, Metal to Wood... 

Dispensible electrically conductive adhesive Epoxy Resin (Bisphenol-F) 15-25% Diepoxide diluent 1-15% Aromatic amines 5-15% Silver flake (Ferro 26 LV, Silflake 282, etc.) 50-80% Ablebond 84-1 series, Epo-Tek 3001, Ablebond 967-1, Epo-Tek H20 series... 

The two parallel surfaces of the specimens are bonded to the loaded platens with adhesive (epoxy resin compound) before testing in both procedures. 

The use of adhesives/sealants in both the industrial and consumer spheres has increased dramatically in the past 20 years. In the industrial segment, both reactive and nonreactive systems are used in a wide variety of applications. The increasing use of reactive systems has, however, tended to overshadow that of the nonreactive systems. Most prominent amongst the reactive systems favored in industrial applications are anaerobic sealants (methacrylate ester based), instant adhesives (alkyl cyanoacrylate ester based), acrylic (toughened) adhesives, epoxy resin adhesives, polyurethane/isocyanate-based adhesives, silicone adhesives/sealants, and phenolic resin adhesives. 

The scope of epoxy-resin application is broad. Epoxy resins are used mostly in two-component paints and other protective coatings, and two-component adhesives. Epoxy resins are used to provide good resistance against water, most chemicals, corrosion, heat and... 

The pretreated polyolefins can be bonded with contact adhesives, epoxy resin adhesives, one- and two-component polyurethane adhesives, and hot-melt adhesives. 

In the electrical industry, it is above all the bonding of sheet packs (dynamo sheets, transformers, motors) and the fixing of small parts (ferrite cores) that are increasing in significance (epoxy resins, cyanoacrylates). Adhesives (epoxy resins) containing conductive additives also are used, for example, for printed circuits. 

MlL-A-8623 Adhesive epoxy resin, metal-to-metal structural bonding... 

MIL-A-60091 Adhesive for Bonding Demolition Charges. MIL-A-81236 Adhesive, Epoxy Resins. 

MMM-A-260 Water-resistant Liquid Adhesive. MMM-B-00350 Binder Adhesive, Epoxy Resin-Flexible. SS-S-1996 Sealer, Water and Weather Resistant. TT-C-00598 Caulking Compound. 

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