STUDIES ON SENSITIVITY TO PLASTICIZERS

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Abstract
PLASTICIZERS are important materials in the manufacture of plastics from synthetic resins. They are added to the resins to introduce new physical properties. Selection of the proper plasticizer may decrease the brittleness, improve the flow or change the melting point of the resin. Dermatitis occurs in workers engaged in the manufacture of synthetic resins and in persons using the finished materials. In a comprehensive survey of the subject, Schwartz1wrote of the causation of dermatitis from these resins. He stated that dermatitis was of frequent occurrence among workers in the industry, but was not usually caused by the finished product. He expressed the belief that the usual causes of dermatitis were the basic materials from which the resin was made, the incompletely condensed resin, the uncombined components and the catalysts or the by-products. For example, during the manufacture of any phenol-formaldehyde resin the phenol or the formaldehyde may cause

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