Paraffin wax is a colorless to white translucent lump. Pure paraffin is white, while paraffin containing impurities is yellow. It is tasteless, odorless, and greasy. It is stable at room temperature, melts at 47°C-64°C, and is soluble in ether, chloroform, benzene, petroleum ether, volatile oil or various fatty oils.
Safety precautions regarding the melting point and stability of paraffin:
Under the specified conditions, the melted paraffin sample is cooled, and the temperature when the stagnation period first appears on the cooling curve. Various wax products require paraffin wax to have good temperature resistance, that is, it will not melt or soften and deform at a specific temperature. Commercial paraffin wax is required to have a series of different melting points depending on the conditions of use, the region and season of use, and the use environment. The main factor affecting the melting point of paraffin is the weight of the raw material fraction selected. The paraffin wax extracted from the heavier fraction has a higher melting point. In addition, the oil content also has a great influence on the melting point of paraffin wax. The more oil contained in paraffin wax, the lower its melting point.
Paraffin wax products are in a hot melt state for a long time during the modeling or coating process and are in contact with air. If the stability is not good, they will easily oxidize and deteriorate. The color becomes darker and even smells bad. In addition, paraffin wax will turn yellow when exposed to light during use. Therefore, paraffin wax is required to have good thermal stability, oxidation stability and light stability. The main factor affecting the stability of paraffin wax is the trace amounts of non-hydrocarbon compounds and condensed aromatic hydrocarbons it contains. In order to improve the stability of paraffin wax, it is necessary to deeply refine the paraffin wax to remove these impurities.
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