Silicone resins are polymers with a three-dimensional branched-chain structure and a low molecular weight. Their various qualities, including great thermal stability, make them ideal for use as binders in paints, varnishes, and impregnating materials.
The amount of tri-functional T groups or, in some cases, quadri-functional Q groups injected into the polymer during production determines the structure of the resin. The type of non-reactive and reactive groups attached to the silicon atoms is also important.
The characteristics of the resin are also influenced by two of the most common types of non-reactive groups found in the siloxane chain: methyl groups impart water repellency, release properties, and surface hardness, whereas phenyl groups impart temperature and weathering resistance, especially by UV-radiation, flexibility at high temperatures, and compatibility with organic products.