(3) Alkali dissolution method: Alkali dissolution method is a method that uses strong alkaline substances such as sodium hydroxide, potassium hydroxide, etc. to react with silicon atoms in silicone resin under high temperature and high pressure conditions to dissolve them in the solvent. method. The alkali dissolution method has the advantages of strong dissolving ability, fast speed, and low solvent consumption, but it requires the use of high-pressure equipment and has high equipment requirements.