How to distinguish the pure silicone oil and ungraded silicone oil?
If you want to reduce the hardness of silicone rubber to operate easier, you may choose to add silicone oil. Where there is industry, there is demand. Accordingly, More widely used silicone rubber, silicone oil will also be used more, However, how do we distinguish pure silicone oil and ungraded silicone oil?
There are three ways to distinguish:
1.Observe by your eyes: ungraded silicone oil is murky and foul-smelling. But pure silicone oil is clear and odorless.
2.Test by fire: light glass rod or pontil with a little silicone oil, if it can be lighted and black smoke, it is white mineral oil. Because white mineral is petrochemical. Pure silicone oil will not burn with the features of odorless, transparent and non-toxic. The ignition temperature of pure silicone rubber is 320 ℃, and the white mineral oil is 100 ℃.
3.Text by freezing point: take 100g of pure silicone oil and the same to white mineral oil, put them to refrigerator, the temperature is adjustable to -5 to -10 ℃. After two hours, we will see that the white mineral oil is murky or frozen, however, the pure silicone oil is still clear and transparent, and it will not frozen until -50℃.