Chemical paint stripping

Phenolic wastes are one of the most prevalent forms of chemical pollutants in industry today. The major sources of phenolic waste are insulation fiberglass manufacturing, petroleum refineries, textile mills, steel making, plywood, hardboard production, manufacture of organic chemicals, paint stripping, and wood preservatives. Eisenhauer (1964) first studied oxidation of phenolic wastes with Fenton s reagent. It has been demonstrated that the oxidation of phenol involves the intermediate formation of catechol and hydroquinone (Merz and Waters, 1949 Stein and Weiss, 1951 Wieland and... 

Based on these tests, we conclude that chemical paint stripping is a practical and safe method of removing lead paint providing the stripper does not contain such volatile solvents as methylene dichloride or other materials such as... 

Chemical paint stripping is recommended where it is cost effective. Vacuum-abrasive cleaning should follow chemical paint stripping and heat gun treatment because a residual amount of lead remains on the substrate with the two latter methods. If the heat gun treatment is not carefully controlled, the paint may become too hot, causing the paint to decompose and produce fumes as a result, lead particles enter the atmosphere. Most interior surfaces are particle board, wood, or sheet rock. A test patch should be made to determine... 

Trichloroethylene use has declined as a result of environmental concerns. However, trichloroethylene may replace some 1,1,1-trichloroethane appHcations. Perchloroethylene used in small businesses for dry cleaning will be regulated for emissions under the same guidelines as those that govern the large chemical producers. This will cause replacement of perchloroethylene for those appHcations where recovery is uneconomical. Methylene chloride has been classified as a suspected carcinogen and its use will decline in aerosol and paint stripping appHcations because of health concerns. 

Eor use in paint strippers, one of its first appHcations, methylene chloride is blended with other chemical components to maximi2e its effectiveness against specific coatings. Typical additives include alcohols, acids, amines or ammonium hydroxide, detergents, and paraffin wax. Paint stripping formulations without methylene chloride have not as yet been shown to be as effective as those with methylene chloride. 

A profile of methylene chloride is presented including US production capacities, demand, growth rate, price, uses, strength, weakness and outlook. Paint stripping and removal accounts for 30% of MeC by end-use application, adhesives 20%, metal cleaning 10%, aerosols 10%, pharmaceuticals 10%, chemical processing 10% and flexible PU foams 5%. Because of occupational concerns, users of MeC are under pressure to limit use, restrict... 

Verhoeff, A.P., Suk, J. van Wijnen, J.H. (1988) Residential indoor air contamination by screen printing plants. Int. Arch, occup. environ. Health, 60, 201-209 Verschueren, K. (1996) Handbook of Environmental Data on Organic Chemicals, 3rd Ed., New York, Van Nostrand Reinhold, pp. 943-947 Vincent, R., Poirot, R, Subra, L, Rieger, B. Cicolella, A. (1994) Occupational exposure to organic solvents during paint stripping and painting operations in the aeronautical industry. Int Arch, occup. environ. Health, 65, 377-380... 

Chapter 4.3 Chemical Leasing in the Field of Paint Stripping... 

For years, the standby chemical for stripping paint has been methylene chloride however, it s exceedingly toxic and can even be fatal. Opt instead for benzyl alcohol or soy-based strippers, which are safer for you and the environment. (If you do use a methylene chloride-based paint stripper, you must wear a respirator, chemical-resistant gloves, and protective clothes, and catch all excess chemicals with a drop cloth and rags.)... 

Chemical Reactivity - Reactivity with Water No reaction Reactivity with Common Materials Will strip and dissolve paint dissolves most plastic materials can cause swelling of rubber by absorption. The reactions are not hazardous Stability During Transport Stable Neutralizing Agents for Aci and Caustics Flush with water Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

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