Cold paint removal

Cold Paint Removal. Up to a few years ago, cold paint removal based on the use of dichloromethane [75-09-2] (methylene chloride) was the most widely used paint removal method. Use of this method is declining in favor of chemical or thermal methods due to concern about the environmental and occupational safety of halo-genated hydrocarbons. 

Used industrially as a chemical intermediate in the production of rayon, carbon tetrachloride, xanthogenates, flotation agents, and pesticides used in the cold vulcanization of vulcanized rubber, in adhesive compositions for food packaging as a solvent for phosphorus, sulfur, selenium, bromine, iodine, fats, resins, rubbers, waxes, lacquers, camphor, resins and in the production of optical glass, paints, enamels, varnishes, paint removers, tallow, putty preservatives, rubber cement, soil disinfectants, explosives, rocket fuel, and electronic vacuum tubes. 

Cleaning polymer reactors, engines, machinery paint removers Water flushable. Removes vinyl, polyurethane, ABS. polystyrene, and other resin deposits. Residues usj ly dissolve vwlh mild agitation. Easily recovered. Can be used to improve formulations tor paint reriKivers ba on nonflammable solvents. Has synergistic effect in cold cleaners. 

Individual pieces of woodwork, spindles, molding, etc., can be removed and dipped into a dip tank of paint remover for thorough removal. The pieces should be neutralized, according to the directions for the particular stripper, and immediately repainted or otherwise sealed. A COLD TANK is preferable to a HOT TANK, which uses lye and can be more destructive to old and dried pieces that are stripped. Lead may remain in the grain of the wood. The use of particularly caustic strippers tends to leave potentially hazardous levels of lead on the surface of stripped wood. 

Table 15.13. This specification follows good industrial practice, with additional safeguards in rinsing to remove residues to treatment solutions. Nonaccelerated treatments must be followed by a single rinse which may contain chromate accelerated treatments must be followed by three rinses—cold water, hot water and a final chromate rinse. Table 15.14 shows the salt-spray test requirements for phosphate coatings with various finishes without formation of rust the paints and lacquer have the additional requirement that no rust shall be visible beyond 0-2 in (5 mm) from the deliberate scratches and no blistering, lifting or flaking beyond 0-05 in (1-27 mm) from the original boundaries of the scratches.

In architectural paints, continuous films are formed even in cold weather water-stains are sealed effectively with no bleed-through and fresh films are not removed by rain. 

Uses Defoamer, drainage aid for kraft pulp mill brownstock washing operations, cold-stock systems, pulp mill bleaching and screening grind and letdown defoamer for gloss and deep tint paints Features Removes entrained air and surface foam Regulatory FDA compliance... 

Use as solvent in paint and varnish removers manufacture of aerosols cold cleaning and ultrasonic cleaning and as a solvent in furniture stripping. General dilution ventilation local exhaust ventilation local exhaust ventilation personal protective equipment substitution. 

To thaw mount slices, one can either place a room temperature plate near a cold slice and allow the slice to melt onto the plate or use fine paint brushes to place a cold slice on a cold plate and warm both the plate and the slice together by removing them from the box into the room temperature air. The latter method has been shown to result in less peptide loss (25). 

Methyl chloroform is an excellent solvent for the cold (room temperature) cleaning of a wide variety of manufacturing equipment and products including yams, threads, finished cloth, reinforced fiberglass, plastics, and common and exotic metals. The solvent removes most greases, oils, lubricants, waxes, adhesives, inks, fluxes, paints, stamping and drawing compounds, tars, and other soils. 

Firstly, heavy greases, paints and lacquers are removed by hot alkali and cold alkali solutions. Surface contamination is removed by grit blasting. Scales and oxides are removed by pickling solution of H2SO4 or HCl. 

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