Formation and Determination of Paint Films

Formation and Deterioration of Paint Films

“…The same arguments seem to rule out the possibility of the peroxide polymer V as suggested by Staudinger (14)• On the basis of these deductions it seems improbable, then, that the polymer is formed through bridges involving C-O-C or C-0-0-C linkages. This deduction receives considerable support from the observation that there are only insignificant differences between the amount of oxygen found in oxidized drying oil esters by ultimate analysis and the sum of oxygen present in ester, peroxide, aldehyde, and hydroxyl groups (10,11,12). It appears reasonable to existed in the final film, they would not have been detected or measured quantitatively by the analytical methods for the determination of the oxygen-containing groups enumerated above.…”

“…The first step is the period of induction before oxidation is appreciable; the second step is the period where oxidation occurs most rapidly; this is followed by a third step where the oxygen apparently rearranges, forming conjugated systems if they are not already present; the fourth step is polymerization accompanied by a rapid increase in density, a rapid decrease in THIS investigation was undertaken to gather experimental data needed for a hypothesis of the process or processes involved in the formation and deterioration of complex drying oil film systems. The three previous papers described the changes in chemical and physical properties of methyl (10), glycol (11), and glyceryl (12) esters of unsaturated fatty acids on prolonged exposure to ultraviolet light.…”

Mechanism of the Oxidation of Drying Oils

“…If peroxides in drying oils decomposed largely in this manner, a much higher content of hydroxyl groups would be found. Oxidized oils often contain less than 2% hydroxyl (28).…”

Proposal - "Mechanism of Drier Action"

“…Significantly, it has been demonstrated that the alcohol attached to the fatty acid chains has no apparent effect upon the oxidation mechanism of the fatty acids (15,51). Oxygenated Compounds and Derivatives.…”