Methylene Chloride Reflux Extraction Development for Quantitative Determination of Solids in Silicone Oil Base Thermal Compounds
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15
Thermal grease is commonly used to remove heat from electronic components because of its dielectric properties. The thermal grease is composed of a mechanical mixture of zinc oxide, silicone dioxide and silicone oil. The solid content of this mixture is one of the most important criteria used in characterization and the final formulation of the thermal grease. Controlling the solid content of the thermal grease is essential in order to prepare a grease of the same quality and performance. Methylene chloride has the capability to remove silicone oil from thermal grease to such a degree that it can be used for quantitative determination of the percentage of solids in the grease. When this concept is used in combination with a reflux extraction technique, the percentage of solids can be determined to within #0.1%.