EXTRACTABLES SOLVENT EXTRACTABLES IN PETROLEUM WAXES: ASTM D3235
EXPLANATION
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 not depends on the intended use of the wax.
TEST SUMMARY
The sample is dissolved in a mixture of 50 volume % methyl ethyl ketone and 50 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 weighing the residue.
TEST PRECISION
In the extractables range 15 to 55 %, the test method has a repeatability of 2 % and a reproducibility of 5 %.
This test method has no bias.
