Лако-красочные материалы — производство

Flash point is one important indicator of the relative flammabi­lity hazard of solvents and solvent-containing products; therefore, this is a very important specification for solvents and paints. The flash point of a liquid may be defined as the lowest temperature at which the liquid, in contact with air, is ignited by a spark or flame under specified conditions. The Abel method (Institute of Petroleum Test Method 170), the Pensky-Martens closed-cup method (ASTM D 93), the Tag open-cup method (ASTM D 1310), the Tag closed-cup method (ASTM D 56), the Setaflash closed-cup method (ASTM D 3278), and ISO 3679 and ISO 3680 are some of the test methods used to determine flash point of a system; each method requires specific protocols and equipment. For compliance with regulations related to transportation and storage, the flash point must be determined by a specified method.

Flash point is roughly inversely proportional to volatility. When there are mixtures of miscible solvents, which is true for most coa­tings, in most cases the flash point can be assumed to be that of the solvent with the lowest flash point, provided that a substantial proportion of that component is present, such as 5 % or more.