Evaluation of Photochemical Reactivities of Commercial Paint Solvents

Abstract

The photochemical reactivities of 11 kinds of commercial paint solvents were investigated by smog chamber irradiation test and linear summation method. For linear summation methid, the mole fraction, Altshuller's reactivity scale, OH radical reaction rate constant and reactivity indices of each hydrocarbon were used. Altshuller's reactivity scales and OH radical reaction rate constants of oxygen contained hydrocarbons were estimated by use of the regression formula of nitrogen oxide depletion rate with the scale and the constant of hydrocarbons, which were already reported.
The photochemical reactivities of 11 kinds of commercial paint solvents were in the range of 2-4 by 5 graduation method, which were proposed by Suyama et al. The correlation of reactivity between irradiation test and linear summation method showed high correlativity. Especially in the case of OH radical reaction rate constant, the highest correlation was obtained. The coefficient of correlation was 0.970-0.918. As the result, it was found that linear summation method was very useful for the evaluation of photochemical reactivity of paint solvents, especially in the case of OH radical reaction rate constant.