Paints economics

Screen Printing Ink is applied to part through a finely woven screen. Screen is masked in areas that won t be painted. Economical means for decorating flat or curved surfaces, especially in relatively short runs. Screens, fixture, squeegee conveyorized press setup (for any kind of volume). Dryers Manual screen printing possible, for very low-volume items... 

The alternative to painting economical and ecologically friendly. The Senoplast In-Mold Film Brochure, 1997. 

Aluminum Paints. Mica is substituted for up to 25% of the aluminum in this type of paint (qv) as an economic measure. Mica is inert which tends to protect the more reactive aluminum from corrosive atmospheres, thus helping the paint to maintain its luster. 

Copolymers with butadiene, ie, those containing at least 60 wt % butadiene, are an important family of mbbers. In addition to synthetic mbber, these compositions have extensive uses as paper coatings, water-based paints, and carpet backing. Because of unfavorable reaction kinetics in a mass system, these copolymers are made in an emulsion polymerization system, which favors chain propagation but not termination (199). The result is economically acceptable rates with desirable chain lengths. Usually such processes are mn batchwise in order to achieve satisfactory particle size distribution. 

Economic Aspects. Table 3 shows that mbber production is the largest market for zinc oxide the downturn in 1980 resulted from a drop in tire production because of the production trend to smaller tires, more importation of tires, and a recession. The drop in paint usage reflects the trend to water-base paints, which originally contained no zinc oxide. However, its growing use in such paints is based upon improved formulations based on zinc oxide. The increased use in agriculture is a result of the realization of the importance of zinc as a trace element. The rise in use of zinc-oxide-coated paper for photocopying is followed by a slackening in use because of a shift to plain-paper copiers. 

In the case of whey, paint, and other midflux process fluids, mechanical energy at the membrane surface produces a larger dividend. For these applications, pumping for depolarization is much more important economically, but the trend toward lower-cost membranes has nonetheless shifted systems toward more membrane area. 

It is essential to dry passivated surfaces promptly to protect them from moisture and atmospheric contamination. The drying may be carried out by blowing compressed air, which is easier and more economical, or by placing in the same oven as for the paint. Special care need be taken with hidden surfaces, such as in corners, bends and crevices, to ensure that there is no trapped moisture. 

Many engineers appreciate that painting, which should be a minor part of an engineering project, can assume major proportions if there are problems or premature failures. For any painting work for which premature failure is economically or practically unacceptable, it is advisable to use full-time, qualified paint inspection. Note that part-time inspection, or visit inspection, can in some ways be worse than no inspection at all. 

Organic and inorganic paint systems are widely used to protect and enhance appearance because they are often economic and always flexible in use. In many industries paint is chosen when other coating processes are technically impossible or uneconomic. Because it is so often used upon subjects which are difficult to coat, sensible design detailing becomes even more important. 

Sprayed coatings can be used as a base for painting and it is recommended that a minimum of 0-075 mm of aluminium be used. In practice a combination of 0-1-0-2 mm of aluminium plus paint coatings will give maximum economic durability on long-term structures. 

The corrosion resistance of zinc is discussed in Section 4.7, and it is only necessary here to say that zinc is protected against further attack by a film of corrosion products. It is remarkably resistant to atmospheric corrosion except perhaps in the most heavily contaminated industrial areas, and even there its use as a protective coating is still a sound practical and economic proposition. The value of zinc coatings as a basis for painting under very aggressive conditions has been clearly demonstrated. 

Methyl Acetone. Commercial product .a water-white, anhydr liq, consisting of various mixts of acet (45 to 65%), methyl acetate (20 to 30%) and methanol (20 to 40%). Density about 0.83g/cc, boiling range 50 to 70°, flash p near 0°F. Miscible with hydrocarbons, oils and w. Obtained as a by-product in the manuf of acet and methanol from wood distn, representing fractions which cannot be economically sepd. The mixt can be used as such, being an excellent solv and plasticizer for NC and other cellulose esters, such as the acetate. It also dissolves rubber, gums, resins, lacquers, paint and varnish Refs 1) T.H, Durrans, Solvents , Van-Nostrand, NY (1938), 122 2) CondChemDict... 

For the majority of merchant ships, which dry-dock at intervals of about 12 to 18 months, the conventional paint-formulations containing simple triorganotin additives are quite satisfactory, and provide adequate protection over this period. However, giant tankers involve capital investment that runs into millions of pounds, and their economical... 

EC (2002) Assessment of the risks to heaith and the environment posed by the use of organostannic compounds (exctuding use as a biocide in antifouiing paints) and a description of the economic profiie of the industry. Final report prepared for the European Commission (Enterprise Directorate-General), July (Contract No. ETD/FIF.20010617). 

The commercial process for the production of vinyl acetate monomer (VAM) has evolved over the years. In the 1930s, Wacker developed a process based upon the gas-phase conversion of acetylene and acetic acid over a zinc acetate carbon-supported catalyst. This chemistry and process eventually gave way in the late 1960s to a more economically favorable gas-phase conversion of ethylene and acetic acid over a palladium-based silica-supported catalyst. Today, most of the world s vinyl acetate is derived from the ethylene-based process. The end uses of vinyl acetate are diverse and range from die protective laminate film used in automotive safety glass to polymer-based paints and adhesives. 

---