MICROCRYSTALINE WAX (IMPORTED)
The MC Waxes are produced usually from distillate residues and are of following two types based on the melting point :
Flexible MCW : Low molecular weight, low melting point wax produced from heavy Petroleum residues of either Paraffinic or mixed base crude oils and also by refining bright slack waxes from the propane deasphalted (PDA) stocks. They can be further classified into two groups viz. Food Grade & Non-food Grade based on UV absorption test.
Hard MCW : High molecular weight, high melting point wax is produced from crude oil tank bottom or fractionation of residual MCWs.
Several blends with intermediate properties are also possible and marketed.
They differ from refined P. Waxes in size and structure of crystals due to difference in molecular weight. MCWs are more tougher, flexible and have high melting point & tensile strength. They are more adhesive and less lustrous and greasy. The binding properties are much better to P. Waxes thereby preventing the sweating out of the liquid