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Mar 20, 2023
Silicone resin is called prepolymerized silicone resin (or called silicone resin prepolymer) before it is cured. The pre-polysilicone resin is based on the halo content of the trifunctional chain (T unit) or tetrafunctional chain (Q unit), the type of substituent (R), the R/Si ratio and the number of reactive functional groups (OH, OMe, OEt , Vi, H, etc.), there are original liquid (also known as solvent-free resin), solid or solvent type, water-based type, emulsion type, etc. in which the solid resin is dissolved in a solvent.
Silibase Silicone is a professional manufacturer of silicone and silicone resin.
Among solvent-free paints, those that are solid at room temperature are called solid resins, and those that are liquid are called solvent-free paints. In order to make it into a liquid state, it can be made into a low molecular weight or a straight chain structure, and a small polar reactive group (such as a vinyl group and a hydrogen group, etc.) is introduced on the side chain, and a ternary structure is formed by addition reaction. If the low-molecularized substance is still cured alone, the physical and mechanical properties will be reduced, so high-molecular siloxane crosslinking agents can be used, or organic resins and modified intermediates can be used. There are few functional groups in low molecular siloxane, and there are some substances with vapor pressure at room temperature. If these substances remain in the cured resin, they will slowly evaporate during use and adhere to the surrounding electrical contacts, causing The so-called absolute failure, this must be paid attention to. Although solvent-free paint does not pollute the working environment and has no foaming problem, its viscosity is about 10 times that of solution-based paint, so its working conditions are subject to certain restrictions. Generally, it contains Si-OR, silicone-modified intermediate It is now used as a sealant for coil impregnation, casing varnish and voltage part ends.