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Polyurethane foam material for use in future vehicles were evaluated for their potential to contribute to light scattering films (LSF), Methods used included the fog test, infrared analysis for amines, and development of a technique for gas chromatographic analysis of organic extracts of foams. Process amines, including 1,3,5-tris (dimethylamino) pentane, were detected in two samples. Acetonitrile was found to be the most effective of six organic solvents for both direct extraction of foam and washing the film sample from the glass used in the fog test.

Chemical analysis of the light scattering film (LSF) formed on interior glass surfaces of automobiles has been undertaken to identify the significant contributing species. Much of the LSF was found to be stable organic compounds, emanating from materials in the vehicle interior, and condensing on the glass. Some compounds found were actually produced by chemical reaction on the glass. The qualitative and quantitative nature of this film was extremely variable. Environmental conditions have been found to contribute to composition of these films. To identify, and reduce or eliminate the contributing materials appears to be the best means to control the LSF.