Coatings vinyl-epoxy

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. 

Corrosion has been encountered infrequently to date and has been a surface type, as opposed to pitting corrosion that can result in perforations. Entrapped air in the beverage or in the cans headspace increases the corrosive action of the product according to Koehler et at (21). As with beer and other canned foods, aluminum ends provide electrochemical protection when combined with tinplate or tin-free-steel can bodies. The level of iron pickup is reduced while the amount of aluminum dissolved in soft drinks increases without detrimental effect. Aluminum containers with vinyl epoxy and vinyl organosol coatings are compatible with carbonated soft drinks. 

Protective coatings and lacquers may be applied as a roller or spray coating, usually based on vinyl, epoxy, polyester, phenol-alkyd resin, or wax coatings. 

Coatings based on vinyl-epoxies are used as corrosion barrier coatings for storage tanks containing corrosive chemicals. Vinyl-epoxies are a very efficient and long-lasting means of protection for the repair of cured-in-place pipes. This is comparable to replacing a pipe. 

Methyl isobutyl ketone (MIK) is used as a solvent for vinyl, epoxy, acrylic, natural resins, nitrocellulose, paints, varnishes, lacquers, protective coatings, rare metal extraction, and dyes. In addition, it is used as a denaturant for rubbing alcohol, as a synthetic flavoring adjuvant, and as a fruit flavoring agent. 

Use For inks and coatings based on resins of vinyl, epoxy, acrylic, polyurethane, polyamide, nitrocellulose, chlorinated rubber. Also used in automotive finishes, extractions, crystallization, diesel fuel additives, and intermediates. 

If colour is very strong, litho in thin layers is not so rub-resistant as letterpress because of low varnish level. Note that rub resistance and brightness can usually be improved by the addition of over-lacquers or varnishes (based on shellac (spirit), nitrocellulose, Saran, vinyl, epoxy, water varnishes, etc.) or lamination (cellulose acetate, polypropylene, PVC, etc.). Coatings or laminations may also provide heat sealability. 

NiPar. [Angus] Nitropropane intermediate, solvent for inks and coatings esp. for NC, chlorinated rubber, vinyl, epoxy, acrylic, PU, polyamide systems automotive finishes. 

C3 Interiors with high relative humidity, some air pollution. Exteriors in urban and industrial Sa2 /2 Zinc-rich primer. Finishing coats vinyl, chlorinated rubber or epoxy 3-4 175-240... 

Chem. Descrip. Proprietary org. compd. in xylene Uses Antisettling agent for solv.-based systems, acid-catalyzed systems, coatings (acrylic, alkyd, vinyl, epoxy, polyester, silicone alkyd), aerosol paints, antifouling paints, automotive OEM, refinish, and primers, zinc dust primers, anticorrosive primers, marine topcoats, wood furniture coatings... 

Uses Thixotrope for high polarity and oxygenated solv. systems such as nail lacquers, paints/coatings (nitrocellulose lacquers, sol n. vinyls, epoxies, acrylics, wash primers, inorg. zinc-rich primers, chlorinated mb-ber, unsat. polyesters)... 

Uses Monomer producing high modulus polymers with high chemTwater resist, for coatings, powd. coatings, aciylate/epoxy and vinyl ether/ep-oxy coating systems... 

Uses Monomer, flexibilizer, weatherability improver in powd. coatings, actylate/epoxy, vinyl ether/epoxy coating systems Features Low melting fast cure speed low coloration fast wet-out Properties Wh. solid, melts to colorless liq. 100-110 C melt vise. 15 cps (106 C) m.p. 100-110 C flash pt. (Pensky) 309 F Storage Store R.T. 

Uses Monomer, flexibilizer, weatherability improver in powd. coatings, acrylate/epoxy, vinyl ether/epoxy coating systems Trade Names VEctomer VE 4230... 

Acrylates copolymer Epoxy, bisphenol A 2-Hydroxyethyl acrylate Hydroxypropyl acrylate Meroxapol 105 Meroxapol 108 Meroxapol 171 Meroxapol 172 Meroxapol 174 Meroxapol 178 Meroxapol 251 Meroxapol 252 Meroxapol 254 Meroxapol 255 Meroxapol 258 Meroxapol 311 Meroxapol 312 Meroxapol 314 Methacryllc acid Methyl hydroxyethylcellulose PEG-14M PEG-2 stearate PEG-2 tallowate Polyethylene , Styrene/acrylates copolymer binder, textiles adhesives Hydroxypropyl methacrylate binder, textured coatings Vinyl acetate/butyl acrylate copolymer binder, textured finishes Vinyl acetate/ethylene/vinyl chloride terpolymer... 

The most common system comprised vinyl size, acrylic coating and epoxy ester varnish. This system was successfully modified to eliminate the use of size, but more recently, polyester coatings and varnishes have become the most commonly used systems, because of their greater flexibility. 

Uses Antisettiing agent, suspending agent for polar and nonpolar, nonaq. high-solids coatings (aikyds, epoxies, acrylics, vinyls)... 

Types of internal enamel for food containers include oleoresins, vinyl, acryflc, phenoHc, and epoxy—phenoHc. Historically can lacquers were based on oleoresinous products. PhenoHc resins have limited flexibiHty and high bake requirements, but are used on three-piece cans where flexibiHty is not required. Vinyl coatings are based on copolymers of vinyl chloride and vinyl acetate dissolved in ketonic solvents. These can be blended with alkyd, epoxy, and phenoHc resins to enhance performance. FlexibiHty allows them to be used for caps and closures as weU as drawn cans. Their principal disadvantage is high sensitivity to heat and retorting processes this restricts their appHcation to cans which are hot filled, and to beer and beverage products. 

Vinyl organosol coatings, which incorporate a high molecular weight thermoplastic PVC organosol dispersion resin, are extremely flexible. Soluble thermosetting resins, including epoxy, phenoHc, and polyesters, are added to enhance the film s product resistance and adhesion. 

For many moderate-duty films for operating temperatures below 80 to 120°C, M0S2 is used in combination with acryflcs, alkyds, vinyls, and acetate room temperature curing resins. For improved wear life and temperatures up to 150—300°C, baked coatings are commonly used with thermosetting resins, eg, phenohcs, epoxies, alkyds, siUcones, polyimides, and urethanes. Of these, the MlL-L-8937 phenoHc type is being appHed most extensively. 

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