The smoking issue with dimethicone oil
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Newly purchased dimethyl silicone oil, with a viscosity of 1000. It was placed in an oil bath to be heated; smoke kept coming out of it. At first, I thought it was due to the old oil already present, but then the temperature gradually increased. After reaching 150 degrees, after an hour, I noticed that the level of the oil in the oil bath had dropped significantly, and its viscosity had also increased greatly. Have you all ever seen such a situation?
What color is the smoke? Is it because the silicone oil isn’t pure?
Personally, I think it’s probably because the temperature is too high; some of it has evaporated. You can refer to the MSDS of this product for more information. The viscosity of dimethyl silicone oil is 1000; what is it used for?
Is it that high at room temperature, 1000? ? Are there any other light components that can volatilize more easily at lower temperatures? !
Yes, the silicone oil is impure and of poor quality; replacing it with fresh oil makes a big difference. .
Counterfeits and substandard products have always been a specialty of China. Methyl silicone oil does not emit smoke at 150 degrees under normal pressure; the presence of smoke indicates the presence of impurities with low volatility.
Too many impurities! ! Dizzy! Attention, original poster: it’s fine if there are impurities, but don’t damage the equipment or you’ll face big problems! ! !
No, use some imported silicone oil with the same viscosity. Measure the specific gravity of these two types of silicone oil to see if there is any difference, thereby determining whether the silicone oil is impure
Silicone oil has a parameter related to volatile components, and these volatile components are the unreacted epoxy silanes. However, it does not emit smoke at 150 degrees; smoking should occur only if low-boiling-point solvents such as toluene are present.
A new silicone oil needs to be replaced; the dimethyl version doesn’t produce smoke at high temperatures