ASTM D3235 Standard Test Method for Solvent Extractables in Petroleum Waxes
3. Summary of Test Method
3.1 The sample is dissolved in a mixture consisting of 50 % by volume methyl ethyl ketone and 50 % by volume toluene. The solution is cooled to -32 °C (-25 °F) to precipitate the wax, then filtered. The solvent extractables content is determined by evaporating the solvent from the filtrate and determining the mass of the residue.
4. Significance and Use
4.1 The solvent extractables in a wax may have significant effects on several of its properties such as strength, hardness, flexibility, scuff resistance, coefficient of friction, coefficient of expansion, melting point, and staining characteristics. Whether these effects are desirable or undesirable depends on the intended use of the wax.
