Epoxy-phenolic coatings

Epoxy phenolic coatings These materials are also cured at relatively high temperatures and are made by the reaction of the epoxy resin with the phenolic resin. They are slightly less critical in application requirements, are less sensitive to curing conditions and can be applied in thicker coats. The best use for both these materials is as tank linings used for the storage or food products, drinks, etc. or for process plant, evaporators, etc. that contain boiling water. 

Shipment and Storage Specifications. AT-Vinyl-2-pyrrolidinone is available in tank cars and tank trailers and in dmms of various sizes. Shipping containers are normally steel or stainless steel. Tank cars are provided with heating coils to facilitate unloading in cold weather. Rubber, epoxy, and epoxy—phenolic coatings are attacked and must be avoided. Carbon steel has been successfully used for storage tanks, but stainless steel preserves product quality better. Aluminum and certain phenolic coatings are also satisfactory. 

A as well as BADGE arising from the use of BADGE in organosol and epoxy phenolic coatings. Possible residues remaining in the coatings are listed below, all of which have been fovmd to contaminate the food ... 

Coat the steel surface with epoxy-phenolic coating. 

The thermal stabiUty of epoxy phenol—novolak resins is useful in adhesives, stmctural and electrical laminates, coatings, castings, and encapsulations for elevated temperature service (Table 3). Filament-wound pipe and storage tanks, liners for pumps and other chemical process equipment, and corrosion-resistant coatings are typical appHcations using the chemically resistant properties of epoxy novolak resins. 

In addition to electrical uses, epoxy casting resins are utilized in the manufacture of tools, ie, contact and match molds, stretch blocks, vacuum-forrning tools, and foundry patterns, as weU as bench tops and kitchen sinks. Systems consist of a gel-coat formulation designed to form a thin coating over the pattern which provides a perfect reproduction of the pattern detail. This is backed by a heavily filled epoxy system which also incorporates fiber reinforcements to give the tool its strength. For moderate temperature service, a Hquid bisphenol A epoxy resin with an aHphatic amine is used. For higher temperature service, a modified system based on an epoxy phenol novolak and an aromatic diamine hardener may be used. 

Figure 5.16 Delaminated, phenolic epoxy resin coating on an internal surface. (Magnification 7.5x.)...

Two-piece food cans may be made by a draw-redraw process, in which lacquer is first applied to and cured on sheet. Blanks are then cut from the sheet and the can is drawn from the blank in two or three stages. The lacquer deforms with the drawing process and lubricates the draw. It then becomes the interior protective coating. Although epoxy-phenolic solvent-borne lacquers are used, even better drawing properties are obtained from organosols. These are dispersions of colloidal polyvinyl chloride powder in solutions of other mixed resins in solvent, e.g. chosen from epoxy, polyester, vinyl and phenolic. 

The production test showed that the epoxy phenolic enamel was the preferred enamel for coating tinplate containers used in packaging irradiation-sterilized ham and beef. The preferred end-sealing compound for the same application was the blend of cured and uncured isobutylene-isoprene copolymer. 

Epoxy phenolic can coatings, 18 38 Epoxy phenol novolac (EPN) resins, 10 367-368 toxicity of, 10 461... 

Glass transition temperatures were determined refractometrically, as described by Wiley (20), with an Abbe refractometer supplied by Bellingham and Stanley. This instrument can normally be used only at temperatures up to 70°C. The prisms of this instrument were coated with a heat resistant adhesive (epoxy-phenolic resin mixture). After this modification the refractometer can be used at temperatures up to 200°C. 

Boric acid in conjunction with APP was reported in epoxy intumescent coating.30-31 Boric acid and its derivatives were used in phenolics to impart thermal stability and tire retardancy. For example, Nisshin steel claims the use of boric acid and aluminum trihydroxide (ATH) in phenolics for sandwich panel.32 It was also reported that the small amounts of boric acid (around 0.25% by weight) in polyether imide (PEI) and glass-filled and PEI can reduce peak HRR by almost 50% in the OSU Heat Release test for the aircraft industry.33 In applications where high modulus and high strengths are needed, boric acid can be added without the softening effects of other additives such as siloxanes. 

The best generic coatings for carbon steel that may be surrounded by wet insulation in the 140° to 250° F (60° to 120° C) range are the epoxy phenolic and the amine-cured coal tar epoxy formulations. 

Component Epoxy-phenolic 422J Part by Epoxy-phenolic solution coating weight... 

Julia D. Harp, Exec. VP/Pres., Coatings Inks Joseph P. Bevilaqua, Exec. VP/Pres., Epoxy Phenolic Resins Richard L. Monty, Exec. VP-Environmental Health Safety Craig O. Morrison, Chmn. 

Fig. 187. Features of phenolic Mannich bases used in epoxy electrophoretic coatings.

First 1930-1950 Vinyls, polystyrenes, acrylics, epoxies, phenolics Low density and ease of processing for applications in packaging, paints, coatings, laminates, and adhesives... 

The base-catalyzed reaction of an epoxy resin with the phenolic resin produces a cross-linked polyether structure that is resistant to chemicals and heat and is a good moisture vapor barrier. Since the curing mechanism does not produce byproducts, thick sections may be obtained without voids and low shrinkage. Applications that employ the advantages of epoxy-phenolic formulations Include molding materials, laminates, coatings, and adhesives. 

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